Panasonic U-4..6ML5XPQ Service Manual
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Panasonic U-4..6ML5XPQ Service Manual

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U-4..6ML5XPQ/DPQ
Urban Multi - Mini UM - Heat Pump

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Summary of Contents for Panasonic U-4..6ML5XPQ

  • Page 1: Service Manual

    Service Manual U-4..6ML5XPQ/DPQ Urban Multi - Mini UM - Heat Pump...

  • Page 3: Table Of Contents

    Panasonic Mini UM ML4 - R-410A Heat Pump 50Hz 1. Introduction ....................v 1.1 Safety Cautions ..................v 1.2 PREFACE ....................ix Part 1 General Information ............1 1. Model Names of Indoor/Outdoor Units............2 2. External Appearance................3 2.1 Indoor Units ....................3 3. Capacity Range..................4 Part 2 Specifications ..............
  • Page 4 Urban Multi ML5 · Mini UM · Heat Pump Restart Standby..................58 Stopping Operation ................59 Protection Control .................60 High Pressure Protection Control............60 Low Pressure Protection Control............61 Discharge Pipe Protection Control ............62 Inverter Protection Control ..............63 Other Control..................64 Demand Operation .................64 Heating Operation Prohibition ..............64 6.
  • Page 5 Panasonic 3.10 “C1” Indoor Unit: Failure of Transmission (Between Indoor unit PC Board and Fan PC Board)......154 3.11 “C4” Indoor Unit: Malfunction of Thermistor (R2T) for Heat Exchanger ................156 3.12 “C5” Indoor Unit: Malfunction of Thermistor (R3T) for Gas Pipes ..157 3.13 “C6”...
  • Page 6 Urban Multi ML5 · Mini UM · Heat Pump 3.48 “UA” Excessive Number of Indoor Units ..........200 3.49 “UC” Address Duplication of Central Remote Controller......201 3.50 “UE” Malfunction of Transmission between Central Remote Controller and Indoor Unit ..........202 3.51 “UF” System is not Set yet..............204 3.52 “UH”...

  • Page 7: Introduction

    Panasonic Introduction 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” Warnings items are especially important since they can lead to death or serious injury if they are not followed closely.
  • Page 8 Urban Multi ML5 · Mini UM · Heat Pump Introduction Caution Do not repair the electrical components with wet hands. Working on the equipment with wet hands can cause an electrical shock. Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock.
  • Page 9 Panasonic Introduction Warning Be sure to use the specified cable to connect between the indoor and outdoor units. Make the connections securely and route the cable properly so that there is no force pulling the cable at the connection terminals.
  • Page 10 Urban Multi ML5 · Mini UM · Heat Pump Introduction Caution Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure. Improper installation and connections can cause excessive heat generation, fire or an electrical shock.

  • Page 11: Preface

    Thank you for your continued patronage of Panasonic products. This is the new service manual for Panasonic's Year 2008 UM ML5 series Heat Pump System. Panasonic offers a wide range of models to respond to building and office air conditioning needs.
  • Page 12 Urban Multi ML5 · Mini UM · Heat Pump Introduction...

  • Page 13: Part 1 General Information

    Panasonic Part 1 General Information 1. Model Names of Indoor/Outdoor Units............2 2. External Appearance................3 2.1 Indoor Units ....................3 3. Capacity Range..................4 General Information...

  • Page 14: Model Names Of Indoor/Outdoor Units

    Urban Multi ML5 · Mini UM · Heat Pump Model Names of Indoor/Outdoor Units 1. Model Names of Indoor/Outdoor Units *Indoor Units Type Model Name Power Supply Ceiling Mounted — Cassette Type (Double Flow) Ceiling Mounted Cassette Type (Round Flow) 600×600 Ceiling —...

  • Page 15: External Appearance

    Panasonic External Appearance 2. External Appearance Indoor Units Roundflow Ceiling Mounted Cassette Concealed Ceiling Unit (Large) S-20UM4JPQ S-40EM3HPS S-25UM4JPQ S-50EM3HPS S-32UM4JPQ S-63EM3HPS S-40..125EM3HPS S-40UM4JPQ S-80EM3HPS S-50UM4JPQ S-100EM3HPS S-63UM4JPQ S-125EM3HPS S-80UM4JPQ S-200EM3HPS S-100UM4JPQ S-250EM3HPS S-200..250EM3HPS S-125UM4JPQ 600×600 4-Way Blow Ceiling Suspended Unit...

  • Page 16: Capacity Range

    Urban Multi ML5 · Mini UM · Heat Pump Capacity Range 3. Capacity Range Outdoor Units Capacity Range U-ML5 No of Indoor Units to be Connected Total Capacity Index of Indoor 50~130 62.5~162.5 70~182 Units to be Connected Indoor Units Capacity Range 0.8HP 1.25HP...

  • Page 17: Part 2 Specifications

    Panasonic Part 2 Specifications 1. Specifications ..................6 1.1 Outdoor Units ...................6 1.2 Indoor Units ....................10 Specifications...

  • Page 18: Specifications

    Urban Multi ML5 · Mini UM · Heat Pump Specifications 1. Specifications Outdoor Units Heat Pump 50Hz <U-4..6ML5XPQ> 1-1 TECHNICAL SPECIFICATIONS U-4ML5XPQ U-5ML5XPQ U-6ML5XPQ Cooling 11.2 14.0 15.5 Capacity Heating 12.5 16.0 18.0 Cooling 3.88 3.88 3.33 Heating 4.43 4.03 3.83...
  • Page 19 Panasonic Specifications 1-1 TECHNICAL SPECIFICATIONS U-4ML5XPQ U-5ML5XPQ U-6ML5XPQ Sound Power (Nominal) Cooling Sound Pressure Sound level (Nominal) Sound Heating Pressure (Nominal) Name R-410A Charge Refrigerant Control Expansion valve (electronic type) Nr of Circuits Name Daphne FVC68D Refrigerant Charged Volume Type...
  • Page 20 Urban Multi ML5 · Mini UM · Heat Pump Specifications Heat pump 50Hz <U-4..6ML5DPQ> 1-1 TECHNICAL SPECIFICATIONS U-4ML5DPQ U-5ML5DPQ U-6ML5DPQ Cooling 11.2 14.0 15.5 Capacity Heating 12.5 16.0 18.0 Cooling 3.99 3.99 3.42 Heating 4.56 4.15 3.94 Capacity range PED category Category I Max n°...
  • Page 21 Panasonic Specifications 1-1 TECHNICAL SPECIFICATIONS U-4ML5DPQ U-5ML5DPQ U-6ML5DPQ Name R-410A Charge Refrigerant Control Expansion valve (electronic type) N× of circuits Name Daphne FVC68D Refrigerant Charged Volume Type Flare connection Liquid Diameter (OD) 9.52 9.52 9.52 (OD) Type Flare connection Flare connection...

  • Page 22: Indoor Units

    Urban Multi ML5 · Mini UM · Heat Pump Specifications Indoor Units Ceiling Mounted Cassette Type (Double Flow) 1-1 TECHNICAL SPECIFICATIONS S-20LM3HPQ S-25LM3HPQ S-32LM3HPQ S-40LM3HPQ S-50LM3HPQ Cooling 2.20 2.80 3.60 4.50 5.60 Nominal Capacity Heating 2.50 3.20 4.00 5.00 6.30 Cooling 0.077 0.092...
  • Page 23 Panasonic Specifications 1-1 TECHNICAL SPECIFICATIONS S-20LM3HPQ S-25LM3HPQ S-32LM3HPQ S-40LM3HPQ S-50LM3HPQ Air Filter Resin net with mold resistance Air direction control Up and downwards Refrigerant control Electronic expansion valve Temperature control Microprocessor thermostat for cooling and heating Safety devices PC board fuse, Fan motor thermal fuse, Drain pump fuse...
  • Page 24 Urban Multi ML5 · Mini UM · Heat Pump Specifications Ceiling Mounted Cassette Type (Double Flow) 1-1 TECHNICAL SPECIFICATIONS S-63LM3HPQ S-80LM3HPQ S-125LM3HPQ Cooling 7.10 9.00 14.00 Nominal Capacity Heating 8.00 10.00 16.00 Cooling 0.161 0.209 0.256 Power input (Nominal) Heating 0.126 0.176 0.223...
  • Page 25 Panasonic Specifications Ceiling Mounted Cassette Type (Round-flow) 1-1 TECHNICAL SPECIFICATIONS S-20UM4JPQ S-25UM4JPQ S-32UM4JPQ S-40UM4JPQ S-50UM4JPQ Cooling Capacity Heating Cooling 0.053 0.053 0.053 0.063 0.083 Power Input Heating 0.045 0.045 0.045 0.055 0.067 Casing Material Galvanised steel Height Packing Width Depth...
  • Page 26 Urban Multi ML5 · Mini UM · Heat Pump Specifications Ceiling Mounted Cassette Type (Round-flow) 1-1 TECHNICAL SPECIFICATIONS S-63UM4JPQ S-80UM4JPQ S-100UM4JPQ S-125UM4JPQ Cooling 11.2 14.0 Capacity Heating 10.0 12.5 16.0 Cooling 0.095 0.120 0.173 0.258 Power Input Heating 0.114 0.108 0.176 0.246 Casing...
  • Page 27 Panasonic Specifications 600×600 Ceiling Mounted Cassette Type (Multi Flow) 1-1 TECHNICAL SPECIFICATIONS S-20YM3HPQ S-25YM3HPQ S-32YM3HPQ S-40YM3HPQ S-50YM3HPQ Cooling 2.20 2.80 3.60 4.50 5.60 Nominal Capacity Heating 2.50 3.20 4.00 5.00 6.30 Cooling 0.073 0.073 0.076 0.089 0.115 Power input (Nominal) Heating 0.064...
  • Page 28 Urban Multi ML5 · Mini UM · Heat Pump Specifications Ceiling Mounted Cassette Corner Type 1-1 TECHNICAL SPECIFICATIONS S-25DM3HPS S-32DM3HPS S-40DM3HPS S-63DM3HPS Cooling 2.80 3.60 4.50 7.10 Nominal Capacity Heating 3.20 4.00 5.00 8.00 Cooling 0.066 0.066 0.076 0.105 Power input (Nominal) Heating 0.046...
  • Page 29 Panasonic Specifications Slim Ceiling Mounted Duct Type (with Drain Pump) 1-1 TECHNICAL SPECIFICATIONS S-20NM3HPQ S-25NM3HPQ Cooling 2.20 2.80 Nominal Capacity Heating 2.50 3.20 Cooling 0.050 0.050 Power input (Nominal) Heating 0.050 0.050 Colour Non painted Casing Material Galvanised steel Height...
  • Page 30 Urban Multi ML5 · Mini UM · Heat Pump Specifications Ceiling Mounted Built-in Type 1-1 TECHNICAL SPECIFICATIONS S-20FM3HPQ S-25FM3HPQ S-32FM3HPQ S-40FM3HPQ S-50FM3HPQ Capacity Cooling 2.20 2.80 3.60 4.50 5.60 (Conditions Heating 2.50 3.20 4.00 5.00 6.30 specified in 1) Cooling 0.110 0.110 0.114...
  • Page 31 Panasonic Specifications Ceiling Mounted Built-in Type 1-1 TECHNICAL SPECIFICATIONS S-63FM3HPQ S-80FM3HPQ S-100FM3HPQ S-125FM3HPQ Capacity Cooling 7.10 9.00 11.20 14.00 (Conditions Heating 8.00 10.00 12.50 16.00 specified in 1) Cooling 0.189 0.234 0.242 0.321 Power input (Nominal) Heating 0.169 0.214 0.222 0.301...
  • Page 32 Urban Multi ML5 · Mini UM · Heat Pump Specifications Ceiling Mounted Duct Type 1-1 TECHNICAL SPECIFICATIONS S-40EM3HPS S-50EM3HPS S-63EM3HPS S-80EM3HPS S-100EM3HPS S-125EM3HPS Cooling 11.2 14.0 Capacity Heating 10.0 12.5 16.0 0.194 (1) 0.215 (1) 0.230 (1) 0.298 (1) 0.376 (1) 0.461 (1) Cooling 0.193 (2)

  • Page 33: Ceiling Suspended Type

    Panasonic Specifications Ceiling Suspended Type 1-1 TECHNICAL SPECIFICATIONS S-32TM3JPR S-63TM3JPR S-100TM3JPR Cooling 3.60 7.10 11.20 Nominal Capacity Heating 4.00 8.00 12.50 Cooling 0.111 0.115 0.135 Power input (Nominal) Heating 0.111 0.115 0.135 Casing Colour White (10Y9/0,5) Height Dimensions Unit Width...
  • Page 34 Urban Multi ML5 · Mini UM · Heat Pump Specifications Wall Mounted Type 1-1 TECHNICAL SPECIFICATIONS S-20KM3HPR S-25KM3HPR S-32KM3HPR S-40KM3HPR S-50KM3HPR S-63KM3HPR Cooling 2.20 2.80 3.60 4.50 5.60 7.10 Nominal Capacity Heating 2.50 3.20 4.00 5.00 6.30 8.00 Cooling 0.016 0.022 0.027 0.020...
  • Page 35 Panasonic Specifications Floor Standing Type 1-1 TECHNICAL SPECIFICATIONS S-20PM3HPS FS-25PM3HPS S-32PM3HPS S-40PM3HPS S-50PM3HPS S-63PM3HPS Cooling 2.20 2.80 3.60 4.50 5.60 7.10 Nominal Capacity Heating 2.50 3.20 4.00 5.00 6.30 8.00 Cooling 0.049 0.049 0.090 0.090 0.110 0.110 Power input (Nominal) Heating 0.049...
  • Page 36 Urban Multi ML5 · Mini UM · Heat Pump Specifications Concealed Floor Standing Type 1-1 TECHNICAL SPECIFICATIONS S-20RM3HPS S-25RM3HPS S-32RM3HPS S-40RM3HPS FS-50RM3HPS S-63RM3HPS Cooling 2.20 2.80 3.60 4.50 5.60 7.10 Nominal Capacity Heating 2.50 3.20 4.00 5.00 6.30 8.00 Cooling 0.049 0.049 0.090...
  • Page 37 Panasonic Specifications Specifications...
  • Page 38 Urban Multi ML5 · Mini UM · Heat Pump Specifications Specifications...
  • Page 39 Panasonic Specifications Specifications...
  • Page 40 Urban Multi ML5 · Mini UM · Heat Pump Specifications Specifications...

  • Page 41: Part 3 List Of Electrical And Functional Parts

    Panasonic Part 3 List of Electrical and Functional Parts 1. List of Electrical and Functional Parts ...........30 1.1 Outdoor Unit ...................30 Indoor Unit....................32 List of Electrical and Functional Parts...

  • Page 42: List Of Electrical And Functional Parts

    Urban Multi ML5 · Mini UM · Heat Pump List of Electrical and Functional Parts 1. List of Electrical and Functional Parts Outdoor Unit U-4, 5, 6ML5XPQ Model Remark Item Name Symbol (PCB terminal) Type JT1G-VDLYR Relay Inverter Compressor Output 2.5kW 3.0kW 3.5kW...
  • Page 43 Panasonic List of Electrical and Functional Parts U-4, 5, 6ML5DPQ Model Remark Item Name Symbol (PCB terminal) Type JT100G-VDL Relay Inverter Compressor Output 2.5kW 3.0kW 3.5kW Crankcase heater (INV) E1HC A1P X28A Motor M1F·M2F 0.07kW — Fan motor Over-current relay —...

  • Page 44: Indoor Unit

    Urban Multi ML5 · Mini UM · Heat Pump List of Electrical and Functional Parts Indoor Unit Model S-100 S-125 Parts Name Symbol Remark S-20UM4 S-25UM4 S-32UM4 S-40UM4 S-50UM4 S-63UM4 S-80UM4 Wired Remote CZ-02RT11P Controller Remote Option Controller Wireless Remote CZ-02RWU12P Controller ±5...
  • Page 45 Panasonic List of Electrical and Functional Parts Model Parts Name Symbol Remark S-20YM3 S-25YM3 S-32YM3 S-40YM3 S-50YM3 Wired Remote CZ-02RT11P Controller Remote Option Controller Wireless Remote CZ-01RWY12P Controller AC 220~240V 50Hz Fan Motor 1φ55W 4P ±5 ±20 Thermal Fuse OFF : 130...
  • Page 46 Urban Multi ML5 · Mini UM · Heat Pump List of Electrical and Functional Parts Model Parts Name Symbol Remark S-20NM3 S-25NM3 Wired Remote CZ-02RT11P Controller Remote Option Controller Wireless Remote CZ-02RWF12P Controller AC 200~240V 50/60Hz 1φ10W4P Motors Fan Motor Thermal protector 135°C: OFF, 87°C: ON ST8601-4 φ4 L=800...
  • Page 47 Panasonic List of Electrical and Functional Parts Model S-20 S-25 S-32 S-40 S-50 S-63 S-80 S-100 S-125 Parts Name Symbol Remark Wired Remote CZ-02RT11P Controller Remote Option Controller Wireless Remote CZ-02RWF12P Controller AC 220~240V 50Hz 1φ125 1φ50W 1φ65W 1φ85W 1φ225W...
  • Page 48 Urban Multi ML5 · Mini UM · Heat Pump List of Electrical and Functional Parts Model Parts Name Symbol Remark S-32TM3 S-63TM3 S-100TM3 Wired Remote CZ-02RT11P Option Remote Controller Controller Wireless Controller CZ-01RWT12P AC 220~240V/220V 50Hz/60Hz Fan Motor 1φ63W 1φ130W Thermal protector 130°C : OFF 80°C : ON Motors...
  • Page 49 Panasonic List of Electrical and Functional Parts Model Parts Name Symbol Remark S-20PM3 S-25PM3 S-32PM3 S-40PM3 S-50PM3 S-63PM3 Wired Remote CZ-02RT11P Controller Remote Option Controller Wireless Remote CZ-02RWF12P Controller AC 220~240V 50Hz Fan Motor 1φ15W 1φ25W 1φ35W Motors Thermal protector 135°C : OFF 120°C : ON...
  • Page 50 Urban Multi ML5 · Mini UM · Heat Pump List of Electrical and Functional Parts List of Electrical and Functional Parts...

  • Page 51: Part 4 Refrigerant Circuit

    Panasonic Part 4 Refrigerant Circuit Refrigerant Circuit .................40 Outdoor Unit ...................40 2. Functional Parts Layout ................44 2.1 U-4, 5, 6ML5XPQ...................44 2.2 U-4, 5, 6ML5DPQ...................45 Refrigerant Circuit...

  • Page 52: Refrigerant Circuit

    Urban Multi ML5 · Mini UM · Heat Pump Refrigerant Circuit Refrigerant Circuit Outdoor Unit U-4, 5, 6ML5XPQ No. in refrigerant Symbol Name Major Function system diagram Inverter compressor is operated on frequencies between 36 Hz and 195 Hz by using Inverter compressor (INV) the inverter.
  • Page 53 Panasonic Refrigerant Circuit C : 3D052628 Refrigerant Circuit...
  • Page 54 Urban Multi ML5 · Mini UM · Heat Pump Refrigerant Circuit U-4, 5, 6ML5DPQ No. in refrigerant Symbol Name Major Function system diagram Inverter compressor is operated on frequencies between 36 Hz and 195 Hz by using Inverter compressor (INV) the inverter.
  • Page 55 Panasonic Refrigerant Circuit C : 3D052712 Refrigerant Circuit...

  • Page 56: Functional Parts Layout

    Urban Multi ML5 · Mini UM · Heat Pump Functional Parts Layout 2. Functional Parts Layout U-4, 5, 6ML5XPQ Birds-eye view PRESSURE SENSOR (HIGH) THERMISTOR LEAD WIRE (SUBCOOLING GAS PIPE) S1NPH RXYSQ-PA7Y1B : R4T (CONNECTOR COLOR : RED) (CONNECTOR COLOR : WHITE) (LOW VOLTAGE) R3T THERMISTOR (SUCTION 1) (MARKING COLOR : RED)

  • Page 57: U-4, 5, 6Ml5Dpq

    Panasonic Functional Parts Layout U-4, 5, 6ML5DPQ Birds-eye view Y2S SOLENOID VALVE (CONNECTOR COLOR : BLACK) (HIGH VOLTAGE) S1NPH PRESSURE SENSOR (HIGH) LEAD WIRE (CONNECTOR COLOR : RED) (LOW VOLTAGE) Y1S 4 WAY VALVE LEAD WIRE (CONNECTOR COLOR : BLUE)

  • Page 58: Back View

    Urban Multi ML5 · Mini UM · Heat Pump Functional Parts Layout Back view R6T THERMISTOR (SUBCOOLING) (MARKING COLOR : WHITE) R3T THERMISTOR (SUCTION 1) (MARKING COLOR : RED) R5T THERMISTOR (SUCTION 2) (MARKING COLOR : GREEN) R1T THERMISTOR (AIR) (MARKING COLOR : YELLOW) R8T THERMISTOR (LIQUID PIPE 2) (CONNECTOR COLOR : WHITE)

  • Page 59: Part 5 Function

    Panasonic Part 5 Function 1. Operation Mode ..................48 2. Basic Control..................49 2.1 Normal Operation ...................49 2.2 Compressor PI Control................50 2.3 Electronic Expansion Valve PI Control...........51 2.4 Cooling Operation Fan Control...............52 3. Special Control..................53 3.1 Startup Control ..................53 3.2 Oil Return Operation ................54 3.3 Defrosting Operation ................56...

  • Page 60: Operation Mode

    Urban Multi ML5 · Mini UM · Heat Pump Operation Mode Operation Mode Operation in stop mode Indoor unit stop or Indoor unit thermostat ON thermostat OFF Malfunction/Standby Restart standby Pressure (Compressor stop) equalization prior to startup Malfunction/ Standby Indoor unit stop or thermostat OFF Startup control •...

  • Page 61: Basic Control

    Panasonic Basic Control Basic Control Normal Operation Cooling Operation Actuator Operation Remarks Used for high pressure protection control, low pressure protection control, discharge pipe Compressor Compressor PI control temperature protection control, and compressor operating frequency upper limit control with inverter protection control.

  • Page 62: Compressor Pi Control

    Urban Multi ML5 · Mini UM · Heat Pump Basic Control Compressor PI Control Compressor PI Control Carries out the compressor capacity PI control to maintain Te at constant during cooling operation and Tc at constant during heating operation to ensure stable unit performance. [Cooling operation] Controls compressor capacity to adjust Te to Te : Low pressure equivalent saturation temperature...

  • Page 63: Electronic Expansion Valve Pi Control

    Panasonic Basic Control Electronic Expansion Valve PI Control Main Electronic Expansion Valve EV1 Control Carries out the electronic expansion valve (Y1E) PI control to maintain the evaporator outlet superheated degree (SH) at constant during heating operation to make maximum use of the outdoor unit heat exchanger (evaporator).

  • Page 64: Cooling Operation Fan Control

    Urban Multi ML5 · Mini UM · Heat Pump Basic Control Cooling Operation Fan Control In cooling operation with low outdoor air temperature, this control is used to provide the adequate amount of circulation air with liquid pressure secured by high pressure control using outdoor unit fan.

  • Page 65: Special Control

    Panasonic Special Control Special Control Startup Control This control is used to equalize the pressure in the front and back of the compressor prior to the startup of the compressor, thus reducing startup loads. Furthermore, the inverter is turned ON to charge the capacitor.

  • Page 66: Oil Return Operation

    Urban Multi ML5 · Mini UM · Heat Pump Special Control Oil Return Operation In order to prevent the compressor from running out of oil, the oil return operation is conducted to recover oil flown out from the compressor to the system side. 3.2.1 Oil Return Operation in Cooling Operation [Start conditions] Referring to the set conditions for the following items, start the oil return operation in cooling.
  • Page 67 Panasonic Special Control 3.2.2 Oil Return Operation in Heating Operation [Conditions to start] The heating oil-returning operation is started referring following conditions. Integrated amount of displaced oil Timer (After the power is turned on, integrated operating-time is 2 hours and subsequently every 8 hours.)

  • Page 68: Defrosting Operation

    Urban Multi ML5 · Mini UM · Heat Pump Special Control Defrosting Operation The defrost operation is performed to solve frost on the outdoor unit heat exchanger when heating, and the heating capacity is recovered. [Conditions to start] The defrost operation is started referring following conditions. Outdoor heat exchanger heat transfer co-efficiency Temperature of heat-exchange (Tb) Timer (2 hours at the minimum)

  • Page 69: Pump-Down Residual Operation

    Panasonic Special Control Pump-down Residual Operation When activating compressor, if the liquid refrigerant remains in the heat-exchanger, the liquid enters into the compressor and dilutes oil therein resulting in decrease of lubricity. Therefore, the pump-down residual operation is performed to collect the refrigerant in the heat- exchanger when the compressor is down.

  • Page 70: Restart Standby

    Urban Multi ML5 · Mini UM · Heat Pump Special Control Restart Standby Restart is stood by force to prevent frequent power-on/off and to equalize pressure in the refrigerant system. Actuator Operation Remarks  Compressor Ta>30°C: STEP4  Outdoor unit fan Ta≤30°C: OFF ...

  • Page 71: Stopping Operation

    Panasonic Special Control Stopping Operation Operation of the actuator when the system is down, is cleared up. 3.6.1 When System is in Stop Mode Actuator Operation Compressor Outdoor unit fan Four way valve Keep former condition. Main electronic expansion valve (EV1)

  • Page 72: Protection Control

    Urban Multi ML5 · Mini UM · Heat Pump Protection Control Protection Control High Pressure Protection Control This high pressure protection control is used to prevent the activation of protection devices due to abnormal increase of high pressure and to protect compressors against the transient increase of high pressure.

  • Page 73: Low Pressure Protection Control

    Panasonic Protection Control Low Pressure Protection Control This low pressure protection control is used to protect compressors against the transient decrease of low pressure. [In cooling operation] Low pressure not limited Pe: LP pressure sensor detection value Pe<0.25MPa Pe>0.39MPa Low pressure...

  • Page 74: Discharge Pipe Protection Control

    Urban Multi ML5 · Mini UM · Heat Pump Protection Control Discharge Pipe Protection Control This discharge pipe protection control is used to protect the compressor internal temperature against a malfunction or transient increase of discharge pipe temperature. [INV compressor] Discharge pipe protection HTdi :Value of INV compressor discharge pipe control not limited...

  • Page 75: Inverter Protection Control

    Panasonic Protection Control Inverter Protection Control Inverter current protection control and inverter fin temperature control are performed to prevent tripping due to a malfunction, or transient inverter overcurrent, and fin temperature increase. [Inverter overcurrent protection control] Not limited •Inverter current ≤ 12A &...

  • Page 76: Other Control

    Urban Multi ML5 · Mini UM · Heat Pump Other Control Other Control Demand Operation In order to save the power consumption, the capacity of outdoor unit is saved with control forcibly by using “Demand 1 Setting”. To operate the unit with this mode, additional setting of “Continuous Demand Setting”. [Demand 1 setting] Setting Standard for upper limit of power consumption...

  • Page 77: Outline Of Control (Indoor Unit)

    Panasonic Outline of Control (Indoor Unit) 6. Outline of Control (Indoor Unit) Drain Pump Control 1. The drain pump is controlled by the ON/OFF buttons (4 button (1) - (4) given in the figure below). 6.1.1 When the Float Switch is Tripped while the Cooling Thermostat is ∗...

  • Page 78: Remote Controller

    Urban Multi ML5 · Mini UM · Heat Pump Outline of Control (Indoor Unit) 6.1.3 When the Float Switch is Tripped During Heating Operation: During heating operation, if the float switch is not reset even after the 5 minutes operation, 5 seconds stop, 5 minutes operation cycle ends, operation continues until the switch is reset.

  • Page 79: Louver Control For Preventing Ceiling Dirt

    Panasonic Outline of Control (Indoor Unit) Louver Control for Preventing Ceiling Dirt We have added a control feature that allows you to select the range of in which air direction can be adjusted in order to prevent the ceiling surrounding the air discharge outlet of ceiling mounted cassette type units from being soiled.

  • Page 80: Thermostat Sensor In Remote Controller

    Urban Multi ML5 · Mini UM · Heat Pump Outline of Control (Indoor Unit) Thermostat Sensor in Remote Controller Temperature is controlled by both the thermostat sensor in remote controller and air suction thermostat in the indoor unit. (This is however limited to when the field setting for the thermostat sensor in remote controller is set to “Use.”...
  • Page 81 Panasonic Outline of Control (Indoor Unit) Heating When heating, the hot air rises to the top of the room, resulting in the temperature being lower near the floor where the occupants are. When controlling by body thermostat sensor only, the unit may therefore be turned off by the thermostat before the lower part of the room reaches the preset temperature.

  • Page 82: Freeze Prevention

    Urban Multi ML5 · Mini UM · Heat Pump Outline of Control (Indoor Unit) Freeze Prevention Freeze When the temperature detected by liquid pipe temperature thermistor (R2T) of the indoor unit heat exchanger drops too low, the unit enters freeze prevention operation in accordance with Prevention by Off the following conditions, and is also set in accordance with the conditions given below.

  • Page 83: View Of Operations Of Swing Flaps

    Panasonic Outline of Control (Indoor Unit) View of Operations of Swing Flaps Swing flaps work as following. Flap control Swinging Level Level Level Hot-start from defrosting Setting the wind direction Level Level Level Swinging Level Level Level Defrosting Setting the wind direction...

  • Page 84: Electronic Expansion Valve Control

    Urban Multi ML5 · Mini UM · Heat Pump Outline of Control (Indoor Unit) Electronic Expansion Valve Control • Electronic expansion Valve Control In cooling, to maximize the capacity of indoor unit heat exchanger (evaporator), operate the electronic expansion valve under PI control so that the evaporator outlet superheated degree (SH) will become constant.

  • Page 85: Part 6 Test Operation

    Panasonic Part 6 Test Operation Test Operation ..................74 Procedure and Outline ................74 Operation when Power is Turned On .............85 Outdoor Unit PC Board Layout .............86 Field Setting ..................87 Field Setting from Remote Controller .............87 Field Setting from Outdoor Unit............104 Test Operation...

  • Page 86: Test Operation

    Urban Multi ML5 · Mini UM · Heat Pump Test Operation Test Operation Procedure and Outline Follow the following procedure to conduct the initial test operation after installation. 1.1.1 Check Work Prior to Turn Power Supply On Is the power supply three-phase 380-415V / 50Hz? Check the below items.

  • Page 87: Air Tight Test And Vacuum Drying

    Panasonic Test Operation 1.1.3 Air Tight Test and Vacuum Drying Air tight test: Make sure to use nitrogen gas. Pressurize the liquid and gas pipes to 4.0 MPa (40 bar) (do not pressurize more than 4.0 MPa (40 bar)). If the pressure does not drop within 24 hours, the system passes the test. If the pressure drops, check where the nitrogen leaks from.

  • Page 88: Important Information Regarding The Refrigerant Used

    Urban Multi ML5 · Mini UM · Heat Pump Test Operation To avoid compressor breakdown. Do not charge the refrigerant more than the specified amount. This outdoor unit is factory charged with refrigerant and depending on pipe sizes and pipe lengths some systems require additional charging of refrigerant.
  • Page 89 Panasonic Test Operation 1.1.4.2 Procedures for adding refrigerant Procedure 1: Adding refrigerant by using the automatic refrigerant charging function (recommended) How to connect the tank? Liquid line stop valve Gas line stop valve Liquid line stop valve Service port for...
  • Page 90 Urban Multi ML5 · Mini UM · Heat Pump Test Operation Led state Throughout the manual the state of the leds is indicated as follows: blinking ON or OFF If H2P is lit up, check the type of error based on the error code in the remote controller and correct the error in accordance with “1.1.5 Check Operation”...
  • Page 91 Panasonic Test Operation 4.4 The led indication becomes as shown in the table below during automatic refrigerant charging. During automatic refrigerant charging, the remote controller indicates TEST (test operation) (external control). H1P H2P H3P H4P H5P H6P H7P Note If the led display below appears, the refrigerant tank is empty. Replace the refrigerant tank, open valve A and re-charge.
  • Page 92 Urban Multi ML5 · Mini UM · Heat Pump Test Operation Case 4: Failure Error code on remote H1P H2P H3P H4P H5P H6P H7P controller See footnote (*) An error in the system interrupted the operation of the unit. Check the error by using the error code displayed on the remote controller.
  • Page 93 Panasonic Test Operation To avoid compressor breakdown. Do not charge the refrigerant more than the specified amount. If the total refrigerant cannot be charged while the outdoor unit is at a standstill, it is possible to charge the refrigerant by operating the outdoor unit using the refrigerant charge function (refer to “Setting mode 2”...

  • Page 94: Check Operation

    Urban Multi ML5 · Mini UM · Heat Pump Test Operation 1.1.5 Check Operation * During check operation, mount front panel to avoid the misjudging. * Check operation is mandatory for normal unit operation. (When the check operation is not executed, alarm code "U3" will be displayed.) Set to setting mode 1 (H1P led is off) (refer to "Setting mode 1"...
  • Page 95 Panasonic Test Operation Malfunction code In case of an alarm code displayed on remote controller: Malfunction Nonconformity during installation Remedial action code The shutoff valve of an outdoor unit is left Open the gas-side shutoff valve and the liquid-side shutoff valve.
  • Page 96 Urban Multi ML5 · Mini UM · Heat Pump Test Operation 1.1.6 Confirmation on Normal Operation • Conduct normal unit operation after the check operation has been completed. (When outdoor air temperature is 24°CDB or higher, the unit can not be operated with heating mode.

  • Page 97: Operation When Power Is Turned On

    Panasonic Test Operation Operation when Power is Turned On 1.2.1 When Turning On Power First Time The unit cannot be run for up to 12 minutes to automatically set the master power and address (indoor-outdoor address, etc.). Status Outdoor unit Test lamp H2P ..

  • Page 98: Outdoor Unit Pc Board Layout

    Urban Multi ML5 · Mini UM · Heat Pump Outdoor Unit PC Board Layout Outdoor Unit PC Board Layout U-4, 5, 6ML5XPQ U-4, 5, 6ML5DPQ Test Operation...

  • Page 99: Field Setting

    Panasonic Field Setting Field Setting Field Setting from Remote Controller Individual function of indoor unit can be changed from the remote controller. At the time of installation or after service inspection / repair, make the local setting in accordance with the following description.
  • Page 100 Urban Multi ML5 · Mini UM · Heat Pump Field Setting CZ-01RT11P UNIT NO. FIRST MODE NO. CODE NO. UNIT No. SECOND FIELD GROUP SETTING CODE NO. MODE If optional accessories are mounted on the indoor unit, the indoor unit setting may have to be changed.
  • Page 101 Panasonic Field Setting 3.1.2 Wireless Remote Controller - Indoor Unit CZ-02RW type CZ-01RW type 1. When in the normal mode, push the “ ” button for 4 seconds or more, and operation then enters the “field set mode.” 2. Select the desired “mode No.” with the “...

  • Page 102: Simplified Remote Controller

    Urban Multi ML5 · Mini UM · Heat Pump Field Setting 3.1.3 Simplified Remote Controller CZ-02RE12P, CZ-03RE12P 1. Remove the upper part of remote controller. 2. When in the normal mode, press the [BS6] BUTTON ( ) (field set), and the FIELD SET MODE is entered.
  • Page 103 Panasonic Field Setting 3.1.4 Setting Contents and Code No. – UM Indoor unit Mode Second Code No.(Note 3) Setting Details Switch Setting Contents Note 2 Super Approx. Approx. Filter contamination long life 10,000 5,000 heavy/light (Setting for filter hrs. hrs.
  • Page 104 Urban Multi ML5 · Mini UM · Heat Pump Field Setting 3.1.5 Applicable Range of Field Setting Ceiling mounted cassette Concealed Concealed Concealed Ceiling Wall Floor Concealed ceiling unit ceiling unit ceiling unit suspended mounted standing floor Roundflow 4-way 2-way Corner (small) (large)

  • Page 105: Detailed Explanation Of Setting Modes

    Panasonic Field Setting 3.1.6 Detailed Explanation of Setting Modes Filter Sign Setting If switching the filter sign ON time, set as given in the table below. Set Time Filter Specs. Standard Long Life Ultra Long Life Filter Setting Contamination Light 200 hrs.
  • Page 106 Urban Multi ML5 · Mini UM · Heat Pump Field Setting (5) Airflow Adjustment (AUTO) External Static Pressure Settings Make settings in either method (a) or method (b) as explained below. (a) Use the airflow auto adjustment function to make settings. Airflow auto adjustment: The volume of blow-off air is automatically adjusted to the rated quantity.
  • Page 107 Panasonic Field Setting (8) Thermostat Switching Differential value during thermostat ON/OFF control can be changed. Mode No. First Code No. Second Code No. Differential value 1ºC 12(22) 0.5ºC (9) Air Flow Setting When Heating Thermostat is OFF This setting is used to set air flow when heating thermostat is OFF.
  • Page 108 Urban Multi ML5 · Mini UM · Heat Pump Field Setting (13) Setting of Normal Air Flow Make the following setting according to the ceiling height. The setting position No. is set to “01” at the factory. In the Case of KM3 Setting Switch Setting Position Mode No.
  • Page 109 Panasonic Field Setting (14) Air Flow Direction Setting Set the air flow direction of indoor units as given in the table below. (Set when optional air outlet blocking pad has been installed.) The second code No. is factory set to “01.”...
  • Page 110 Urban Multi ML5 · Mini UM · Heat Pump Field Setting (18) External Static Pressure Settings (for EM3 model) MODE NO. FIRST CODE NO. SECOND CODE NO. External Static Pressure 30Pa (*1) 50Pa 60Pa 70Pa 80Pa 90Pa 100Pa 13 (23) 110Pa 120Pa 130Pa...
  • Page 111 Panasonic Field Setting (22) Individual Setting of Ventilation This is set to perform individual operation of heat reclaim ventilation using the remote controller/ central unit when heat reclaim ventilation is built in. (Switch only when heat reclaim ventilation is built in.) Mode No.
  • Page 112 Urban Multi ML5 · Mini UM · Heat Pump Field Setting 3.1.7 Centralized Control Group No. Setting CZ-02RT11P Type In order to conduct the central remote control using the central remote controller and the unified ON/OFF controller, Group No. settings should be made by group using the operating remote controller.

  • Page 113: Cz-01Rw Type

    Panasonic Field Setting CZ-02RW type Group No. setting by wireless remote controller for centralized control 1. When in the normal mode, push “ ” button for 4 seconds or more, and operation then CZ-01RW type enters the “field set mode.”...

  • Page 114: Contents Of Control Modes

    Urban Multi ML5 · Mini UM · Heat Pump Field Setting 3.1.8 Setting of Operation Control Mode from Remote Controller (Local Setting) The operation control mode is compatible with a variety of controls and operations by limiting the functions of the operation remote controller. Furthermore, operations such as remote controller ON/OFF can be limited in accordance with the combination conditions.
  • Page 115 Panasonic Field Setting How to Select Whether operation by remote controller will be possible or not for turning on/off, controlling temperature or setting operation mode is selected and decided by the operation mode given on Operation Mode the right edge of the table below.

  • Page 116: Field Setting From Outdoor Unit

    Urban Multi ML5 · Mini UM · Heat Pump Field Setting Field Setting from Outdoor Unit 3.2.1 Setting by Dip Switches The following field settings are made by dip switches on PC board. Dipswitch Setting item Description Setting Cool / Heat Used to set cool / heat change over setting by remote DS1-1 change over...
  • Page 117 Panasonic Field Setting Caution Capacity Setting after changing the main PC Board(A1P) to spare parts PC Board When you change the main PC Board(A1P) to spare parts PC Board, please carry out the following setting. Please Attach the Capacity Setting Adaptor corresponding to Capacity Class (ex. 112, 140, 160) in connector X51A.
  • Page 118 Urban Multi ML5 · Mini UM · Heat Pump Field Setting Setting by pushbutton switches The following settings are made by pushbutton switches on PC board. LED indication (Factory setting) MODE RETURN TEST RESET (V2760) There are the following three setting modes. Setting mode 1 (H1P off) Initial status (when normal) : Also indicates during “abnormal”.
  • Page 119 Panasonic Field Setting a. “Setting mode 1” This mode is used to set and check the following items. 1. Set items ············ In order to make COOL/HEAT selection in a batch of outdoor unit group, change the setting. • COOL/HEAT selection (IND) ·····················Used to select COOL or HEAT by individual outdoor unit (factory set).
  • Page 120 Urban Multi ML5 · Mini UM · Heat Pump Field Setting b. “Setting mode 2” Setting item Description Cool/heat unified Sets address for cool/heat unified operation. Push and hold the MODE (BS1) address button for 5 seconds and set to Low noise/demand Address for low noise/demand operation “Setting mode 2”.
  • Page 121 Panasonic Field Setting Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave ∗ Factory set 8777777 ∗ Address Binary number 8777778 Cool / Heat Unified address (6 digits) 8788888 8777777 ∗ Address Binary number...
  • Page 122 Urban Multi ML5 · Mini UM · Heat Pump Field Setting Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave ∗ Factory set Level 1 (outdoor fan with 6 step or lower) 8777778 8777787 ∗...
  • Page 123 Panasonic Field Setting c. Monitor mode LED display Setting item Data display H2P H3P H5P H6P To enter the monitor mode, push the 9 7 7 7 7 7 7 Various setting See below MODE (BS1) button when in “Setting mode 1”.
  • Page 124 Urban Multi ML5 · Mini UM · Heat Pump Field Setting Push the SET button and match with the LEDs No. 1 - 15, push the RETURN button, and confirm the data for each setting. ★ Data such as addresses and number of units is expressed as binary numbers; the two ways of expressing are as follows: The No.
  • Page 125 Panasonic Field Setting 3.2.2 Cool / Heat Mode Switching There are the following 4 cool/heat switching modes. Set cool/heat separately for each outdoor unit system by indoor unit remote controller. Set cool/heat separately for each outdoor unit system by cool/heat switching remote controller.
  • Page 126 Urban Multi ML5 · Mini UM · Heat Pump Field Setting Set Cool / Heat Separately for Each Outdoor Unit System by Cool/Heat Switching Remote Controller It does not matter whether or not there is outdoor - outdoor unit wiring. Set outdoor unit PC board DS1-1 to OUT (factory set).
  • Page 127 Panasonic Field Setting 3.2.3 Setting of Low Noise Operation and Demand Operation Setting of Low Noise Operation By connecting the external contact input to the low noise input of the outdoor unit external control adaptor (optional), you can lower operating noise by 2-3 dB.

  • Page 128: Image Of Operation

    Urban Multi ML5 · Mini UM · Heat Pump Field Setting Setting of Demand Operation By connecting the external contact input to the demand input of the outdoor unit external control adaptor (optional), the power consumption of unit operation can be saved suppressing the compressor operating condition.
  • Page 129 Panasonic Field Setting Detailed Setting Procedure of Low Noise Operation and Demand Control 1. Setting mode 1 (H1P off) → In setting mode 2, push the BS1 (MODE button) one time. Setting mode 1 is entered and H1P off. During the setting mode 1 is displayed, “In low noise operation” and “In demand control” are displayed.
  • Page 130 Urban Multi ML5 · Mini UM · Heat Pump Field Setting : ON : OFF : Blink Setting Setting Setting No. indication Setting No. indication Setting Setting contents indication (Initial setting) contents contents H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P External low noise /...
  • Page 131 Panasonic Field Setting 3.2.4 Setting of Refrigerant Additional Charging Operation When the outdoor unit is stopped and the entire quantity of refrigerant cannot be charged from the stop valve on the liquid side, make sure to charge the remaining quantity of refrigerant using this procedure. If the refrigerant quantity is insufficient, the unit may malfunction.
  • Page 132 Urban Multi ML5 · Mini UM · Heat Pump Field Setting 3.2.5 Setting of Refrigerant Recovery Mode When carrying out the refrigerant collection on site, fully open the respective expansion valve of indoor and outdoor units All indoor and outdoor unit’s operation are prohibited. [Operation procedure] In “Setting Mode 2”...
  • Page 133 Panasonic Field Setting 3.2.6 Setting of Vacuuming Mode In order to perform vacuuming operation at site, fully open the expansion valves of indoor and outdoor units and turn on some solenoid valves. [Operating procedure] In “Setting Mode 2” with units in stop mode, set “B Refrigerant Recovery / Vacuuming mode”...
  • Page 134 Urban Multi ML5 · Mini UM · Heat Pump Field Setting Test Operation...

  • Page 135: Part 7 Troubleshooting

    Panasonic Part 7 Troubleshooting 1. Symptom-based Troubleshooting ............125 2. Troubleshooting by Remote Controller ..........128 2.1 The INSPECTION / TEST Button............128 2.2 Self-diagnosis by Wired Remote Controller .........129 2.3 Self-diagnosis by Wireless Remote Controller ........130 2.4 Operation of the Remote Controller’s Inspection / Test Operation Button ................132...
  • Page 136 Urban Multi ML5 · Mini UM · Heat Pump 3.29 “J6” Outdoor Unit: Malfunction of Thermistor (R6T) ......177 3.30 “J7” Outdoor Unit: Malfunction of Thermistor (R7T) for Outdoor Unit Liquid Pipe ..............178 3.31 “J9” Outdoor Unit: Malfunction of Thermistor (R4T) ......179 3.32 “JA”...

  • Page 137: Symptom-Based Troubleshooting

    Panasonic Symptom-based Troubleshooting 1. Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure The system does not start operation at all. Blowout of fuse(s) Turn Off the power supply and then replace the fuse(s). Cutout of breaker(s) • If the knob of any breaker is in its OFF position, turn ON the power supply.
  • Page 138 Urban Multi ML5 · Mini UM · Heat Pump Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure COOL-HEAT The remote controller displays This remote controller has no Use a remote controller with selection is "UNDER CENTRALIZED option to select cooling operation. option to select cooling operation. disabled.
  • Page 139 Panasonic Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure 11 The system <Indoor unit> These are operating sounds of Normal operation. produces Immediately after turning ON the electronic expansion valve of This sound becomes low after a sounds. the power supply, indoor unit the indoor unit.

  • Page 140: Troubleshooting By Remote Controller

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Remote Controller 2. Troubleshooting by Remote Controller The INSPECTION / TEST Button The following modes can be selected by using the [Inspection/Test Operation] button on the remote control. Depress Inspection/Test Operation button for more than 4 seconds.

  • Page 141: Self-Diagnosis By Wired Remote Controller

    Panasonic Troubleshooting by Remote Controller Self-diagnosis by Wired Remote Controller Explanation If operation stops due to malfunction, the remote controller’s operation LED blinks, and malfunction code is displayed. (Even if stop operation is carried out, malfunction contents are displayed when the inspection mode is entered.) The malfunction code enables you to tell what kind of malfunction caused operation to stop.

  • Page 142: Self-Diagnosis By Wireless Remote Controller

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Remote Controller Self-diagnosis by Wireless Remote Controller In the Case of If equipment stops due to a malfunction, the operation indicating LED on the light reception section flashes. CZ-02RW Type The malfunction code can be determined by following the procedure described below.
  • Page 143 Panasonic Troubleshooting by Remote Controller The lower digit of the code changes as shown below when the UP and DOWN buttons are pressed. Troubleshooting...

  • Page 144: Operation Of The Remote Controller's Inspection / Test Operation Button

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Remote Controller Operation of the Remote Controller’s Inspection / Test Operation Button Unit Malfunction code Inspection Normal display (No display) Malfunction code blinks when a malfunction occurs. Inspection/test Push the button. operation Unit Example of capacity code display...

  • Page 145: Remote Controller Service Mode

    Panasonic Troubleshooting by Remote Controller Remote Controller Service Mode How to Enter the Service Mode Service Mode 1. Select the mode No. Set the desired mode No. with the button. Operation (For wireless remote controller, Mode 43 only can be set.) Method 2.
  • Page 146 Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Remote Controller Mode Function Contents and operation method Remote controller display example Malfunction Display malfunction hysteresis. hysteresis display The history No. can be changed with the Unit 1 button. Malfunction code 2-U4 Malfunction code...

  • Page 147: Remote Controller Self-Diagnosis Function

    Panasonic Troubleshooting by Remote Controller Remote Controller Self-Diagnosis Function The remote controller switches are equipped with a self diagnosis function so that more appropriate maintenance can be carried out. If a malfunction occurs during operation, the operation lamp, malfunction code and display of malfunctioning unit No. let you know the contents and location of the malfunction.
  • Page 148 Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Remote Controller 8: ON 7: OFF 9: Blink Malfunction Operation Malfunction contents Page code lamp Referred Indoor Unit Error of external protection device PC board defect, E PROM defect Malfunction of drain level control system (S1L) Fan motor (M1F) lock, overload Malfunction of swing flap motor (M1S)
  • Page 149 Panasonic Troubleshooting by Remote Controller 8: ON 7: OFF 9: Blink Malfunction Operation Malfunction contents Page code lamp Referred Outdoor Unit Malfunction of power unit — Malfunction of transmission between inverter and control PC board High voltage of capacitor in main inverter circuit.
  • Page 150 Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Remote Controller Malfunction code indication by outdoor unit PC board <Monitor mode> Contents of malfunction Malfunction To enter the monitor mode, push the code MODE (BS1) button when in In-phase malfunction of UM Net Detection of UM Net “Setting mode 1”.
  • Page 151 Panasonic Troubleshooting by Remote Controller 8: ON 7: OFF 9:Blink Confirmation of malfunction 1 Confirmation of malfunction 2 Confirmation of malfunction 3 Confirmation of malfunction 4 Malfunction code H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P ∗...
  • Page 152 Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Remote Controller <Monitor mode> Contents of malfunction Malfunction To enter the monitor mode, push the code MODE (BS1) button when in Open phase/Power supply imbalance Imbalance of inverter power supply “Setting mode 1”.
  • Page 153 Panasonic Troubleshooting by Remote Controller 8: ON 7: OFF 9:Blink Confirmation of malfunction 1 Confirmation of malfunction 2 Confirmation of malfunction 3 Confirmation of malfunction 4 Malfunction code H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P ∗...

  • Page 154: Troubleshooting By Indication On The Remote Controller

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Remote Controller 3. Troubleshooting by Indication on the Remote Controller “ ” Indoor Unit: Error of External Protection Device Remote Controller Display Applicable All indoor unit models Models Method of Malfunction...

  • Page 155: A1" Indoor Unit: Pc Board Defect

    Panasonic Troubleshooting by Indication on the Remote Controller “ ” Indoor Unit: PC Board Defect Remote Controller Display Applicable All indoor unit models Models Method of Check data from E²PROM. Malfunction Detection Malfunction When data could not be correctly received from the E²PROM E²PROM : Type of nonvolatile memory.

  • Page 156: A3" Indoor Unit: Malfunction Of Drain Level Control System (S1L)

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Remote Controller “ ” Indoor Unit: Malfunction of Drain Level Control System (S1L) Remote Controller Display LM3, UM4, FXSQ, DM3, NM3, EM3, TM3 (Option), 200..250EM3 (Option), KM3 (Option) Applicable Models Method of...
  • Page 157 Panasonic Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is power supply Provide 220~240V power 220~240V provided? supply. The float A short...

  • Page 158: A6" Indoor Unit: Fan Motor (M1F) Lock, Overload

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Remote Controller “ ” Indoor Unit: Fan Motor (M1F) Lock, Overload Remote Controller Display Applicable All indoor unit models Models Method of Detection by failure of signal for detecting number of turns to come from the fan motor Malfunction Detection Malfunction...

  • Page 159: A7" Indoor Unit: Malfunction Of Swing Flap Motor (M1S)

    Panasonic Troubleshooting by Indication on the Remote Controller “ ” Indoor Unit: Malfunction of Swing Flap Motor (M1S) Remote Controller Display Applicable LM3, TM3, DM3, YM3 Models Method of Utilizes ON/OFF of the limit switch when the motor turns. Malfunction...
  • Page 160 Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is power supply Provide 220~240V power 220~240V provided? supply.

  • Page 161: Abnormal Power Supply Voltage

    Panasonic Troubleshooting by Indication on the Remote Controller Abnormal Power Supply Voltage Remote Controller Display Applicable S-40..125EM3 Models Method of Detect malfunction checking the input voltage of fan motor. Malfunction Detection Malfunction When the input voltage of fan motor is 150V and below, or 386V and above.

  • Page 162: A9" Indoor Unit: Malfunction Of Moving Part Of

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Remote Controller “ ” Indoor Unit: Malfunction of Moving Part of Electronic Expansion Valve (Y1E) Remote Controller Display Applicable All indoor unit models Models Method of Malfunction Detection Malfunction...
  • Page 163 Panasonic Troubleshooting by Indication on the Remote Controller ∗ 1: Coil check method for the moving part of the electronic expansion valve Discount the electronic expansion valve from the PC board and check the continuity between the connector pins. (Normal) Pin No.

  • Page 164: Af" Indoor Unit: Drain Level Above Limit

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Remote Controller “ ” Indoor Unit: Drain Level above Limit Remote Controller Display Applicable LM3, FM3, DM3, EM3 Models Method of Water leakage is detected based on float switch ON/OFF operation while the compressor is in non-operation.

  • Page 165: Aj" Indoor Unit: Malfunction Of Capacity Determination Device

    Panasonic Troubleshooting by Indication on the Remote Controller “ ” Indoor Unit: Malfunction of Capacity Determination Device Remote Controller Display Applicable All indoor unit models Models Method of Capacity is determined according to resistance of the capacity setting adaptor and the memory...

  • Page 166: C1" Indoor Unit: Failure Of Transmission

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Remote Controller 3.10 “ ” Indoor Unit: Failure of Transmission (Between Indoor unit PC Board and Fan PC Board) Remote Controller Display Applicable S-40..125EM3 Models Method of Check the condition of transmission between indoor PC board (A1P) and PC board for fan (A2P) using computer.
  • Page 167 Panasonic Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is the connector between indoor PC board (A1P) and Connect the connector...

  • Page 168: C4" Indoor Unit: Malfunction Of Thermistor (R2T)

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Remote Controller 3.11 “ ” Indoor Unit: Malfunction of Thermistor (R2T) for Heat Exchanger Remote Controller Display Applicable All indoor unit models Models Method of Malfunction detection is carried out by temperature detected by heat exchanger thermistor. Malfunction Detection Malfunction...

  • Page 169: C5" Indoor Unit: Malfunction Of Thermistor (R3T) For Gas Pipes

    Panasonic Troubleshooting by Indication on the Remote Controller 3.12 “ ” Indoor Unit: Malfunction of Thermistor (R3T) for Gas Pipes Remote Controller Display Applicable All indoor unit models Models Method of Malfunction detection is carried out by temperature detected by gas pipe thermistor.

  • Page 170: C6" Indoor Unit: Failure Of Combination

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Remote Controller 3.13 “ ” Indoor Unit: Failure of Combination (Between Indoor unit PC Board and Fan PC Board) Remote Controller Display Applicable S-40..125EM3 Models Method of Conduct open line detection with PC board for fan (A2P) using indoor PC board (A1P).

  • Page 171: C9" Indoor Unit: Malfunction Of Thermistor (R1T) For Suction Air

    Panasonic Troubleshooting by Indication on the Remote Controller 3.14 “ ” Indoor Unit: Malfunction of Thermistor (R1T) for Suction Air Remote Controller Display Applicable AII indoor unit models Models Method of Malfunction detection is carried out by temperature detected by suction air temperature thermistor.

  • Page 172: Ca" Indoor Unit: Malfunction Of Thermistor For Discharge Air

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Remote Controller 3.15 “ ” Indoor Unit: Malfunction of Thermistor for Discharge Air Remote Controller Display Applicable AII indoor unit models Models Method of Malfunction detection is carried out by temperature detected by discharge air temperature thermistor.

  • Page 173: Malfunction Of Humidity Sensor System

    Panasonic Troubleshooting by Indication on the Remote Controller 3.16 “ ” Indoor Unit: Malfunction of Humidity Sensor System Remote Controller Display Applicable Models Method of Even if a malfunction occurs, operation still continues. Malfunction is detected according to the moisture (output voltage) detected by the moisture Malfunction sensor.

  • Page 174: Cj" Indoor Unit: Malfunction Of Thermostat Sensor In

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Remote Controller 3.17 “ ” Indoor Unit: Malfunction of Thermostat Sensor in Remote Controller Remote Controller Display Applicable AII indoor unit models Models Method of Malfunction detection is carried out by temperature detected by remote controller air temperature thermistor.

  • Page 175: E1" Outdoor Unit: Pc Board Defect

    Troubleshooting by Indication on the Remote Controller 3.18 “ ” Outdoor Unit: PC Board Defect Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Check data from E²PROM Malfunction Detection Malfunction When data could not be correctly received from the E²PROM E²PROM : Type of nonvolatile memory.

  • Page 176: E3" Outdoor Unit: Actuation Of High Pressure Switch

    3.19 “ ” Outdoor Unit: Actuation of High Pressure Switch Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Abnormality is detected when the contact of the high pressure protection switch opens. Malfunction Detection Malfunction Error is generated when the HPS activation count reaches the number specific to the operation mode.
  • Page 177 Panasonic Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check for the points shown below. Is the stop valve open? Is the HPS connector properly connected to the...

  • Page 178: E4" Outdoor Unit: Actuation Of Low Pressure Sensor

    3.20 “ ” Outdoor Unit: Actuation of Low Pressure Sensor Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Abnormality is detected by the pressure value with the low pressure sensor. Malfunction Detection Malfunction Error is generated when the low pressure is dropped under specific pressure.
  • Page 179 Panasonic Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is the stop Open the stop valve. valve open? Mount a pressure gauge on the low-pressure service port.

  • Page 180: Inverter Compressor Motor Lock

    Inverter Compressor Motor Lock Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Inverter PC board takes the position signal from UVW line connected between the inverter and compressor, and the malfunction is detected when any abnormality is observed in the phase- Malfunction current waveform.

  • Page 181: Malfunction Of Outdoor Unit Fan Motor

    ” 3.22 Malfunction of Outdoor Unit Fan Motor Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Malfunction of fan motor system is detected according to the fan speed detected by hall IC when the fan motor runs. Malfunction Detection...

  • Page 182: Electronic Expansion Valve (Y1E, Y3E)

    3.23 “ ” Outdoor Unit: Malfunction of Moving Part of Electronic Expansion Valve (Y1E, Y3E) Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Check disconnection of connector Check continuity of expansion valve coil Malfunction Detection Malfunction Error is generated under no common power supply when the power is on.
  • Page 183 Panasonic Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Turn power supply off, and turn power supply on again. Return to normal?

  • Page 184: F3" Outdoor Unit: Abnormal Discharge Pipe Temperature

    3.24 “ ” Outdoor Unit: Abnormal Discharge Pipe Temperature Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Abnormality is detected according to the temperature detected by the discharge pipe temperature sensor. Malfunction Detection Malfunction When the discharge pipe temperature rises to an abnormally high level...

  • Page 185: Outdoor Unit: Refrigerant Overcharged

    Troubleshooting by Indication on the Remote Controller 3.25 “ ” Outdoor Unit: Refrigerant Overcharged Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Excessive charging of refrigerant is detected by using the heat exchanging deicer temperature during a check operation. Malfunction Detection Malfunction When the amount of refrigerant, which is calculated by using the heat exchanging deicer temperature during a check run, exceeds the standard.

  • Page 186: H9" Outdoor Unit: Malfunction Of Thermistor (R1T) For Outdoor Air

    ” Outdoor Unit: Malfunction of Thermistor (R1T) for Outdoor Air Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Malfunction is detected from the temperature detected by the outdoor air thermistor. Malfunction Detection Malfunction When the outside air temperature thermistor has short circuit or open circuit.

  • Page 187: J3" Outdoor Unit: Malfunction Of Discharge Pipe Thermistor (R2T)

    3.27 “ ” Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R2T) Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Malfunction is detected from the temperature detected by discharge pipe temperature thermistor. Malfunction Detection Malfunction When a short circuit or an open circuit in the discharge pipe temperature thermistor is detected.

  • Page 188: J5" Outdoor Unit: Malfunction Of Thermistor (R3T, R5T) For Suction Pipe 1, 2

    ” Outdoor Unit: Malfunction of Thermistor (R3T, R5T) for Suction Pipe 1, 2 Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Malfunction is detected from the temperature detected by the thermistor for suction pipe 1, 2. Malfunction Detection Malfunction When a short circuit or an open circuit in the thermistor for suction pipe 1, 2 are detected.

  • Page 189: J6" Outdoor Unit: Malfunction Of Thermistor (R6T)

    3.29 “ ” Outdoor Unit: Malfunction of Thermistor (R6T) Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Malfunction is detected from the temperature detected by the heat exchanger thermistor. Malfunction Detection Malfunction When a short circuit or an open circuit in the heat exchange thermistor is detected.

  • Page 190: J7" Outdoor Unit: Malfunction Of Thermistor (R7T) For Outdoor Unit Liquid Pipe

    ” Outdoor Unit: Malfunction of Thermistor (R7T) for Outdoor Unit Liquid Pipe Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Malfunction is detected from the temperature detected by the liquid pipe thermistor. Malfunction Detection Malfunction When a short circuit or an open circuit in the heat exchange thermistor is detected.

  • Page 191: J9" Outdoor Unit: Malfunction Of Thermistor (R4T)

    Troubleshooting by Indication on the Remote Controller 3.31 “ ” Outdoor Unit: Malfunction of Thermistor (R4T) Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Malfunction is detected according to the temperature detected by subcooling heat exchanger gas pipe thermistor. Malfunction Detection Malfunction When the subcooling heat exchanger gas pipe thermistor is short circuited or open.

  • Page 192: Ja" Outdoor Unit: Malfunction Of High Pressure Sensor

    3.32 “ ” Outdoor Unit: Malfunction of High Pressure Sensor Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Malfunction is detected from the pressure detected by the high pressure sensor. Malfunction Detection Malfunction When the high pressure sensor is short circuit or open circuit.

  • Page 193: Jc" Outdoor Unit: Malfunction Of Low Pressure Sensor

    3.33 “ ” Outdoor Unit: Malfunction of Low Pressure Sensor Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Malfunction is detected from pressure detected by low pressure sensor. Malfunction Detection Malfunction When the low pressure sensor is short circuit or open circuit.

  • Page 194: L1" Outdoor Unit: Malfunction Of Pc Board

    ” Outdoor Unit: Malfunction of PC Board Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Detect malfunctions by current value during waveform output before compressor startup. Detect malfunctions by current sensor value during synchronized operation at the time of Malfunction startup.

  • Page 195: L4" Outdoor Unit: Malfunction Of Inverter Radiating Fin

    ” Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Fin temperature is detected by the thermistor of the radiation fin. Malfunction Detection Malfunction When the temperature of the inverter radiation fin increases above 83°C.

  • Page 196: L5" Outdoor Unit: Inverter Compressor Abnormal

    Troubleshooting by Indication on the Remote Controller 3.36 “ ” Outdoor Unit: Inverter Compressor Abnormal Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Malfunction is detected from current flowing in the power transistor. Malfunction Detection Malfunction When an excessive current flows in the power transistor.

  • Page 197: L8" Outdoor Unit: Inverter Current Abnormal

    Troubleshooting by Indication on the Remote Controller 3.37 “ ” Outdoor Unit: Inverter Current Abnormal Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Malfunction is detected by current flowing in the power transistor. Malfunction Detection Malfunction When overload in the compressor is detected.

  • Page 198: L9" Outdoor Unit: Inverter Start Up Error

    3.38 “ ” Outdoor Unit: Inverter Start up Error Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Malfunction is detected from current flowing in the power transistor. Malfunction Detection Malfunction When overload in the compressor is detected during startup...

  • Page 199: Lc" Outdoor Unit: Malfunction Of Transmission Between

    3.39 “ ” Outdoor Unit: Malfunction of Transmission between Inverter and Control PC Board Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Check the communication state between inverter PC board and control PC board by micro- computer. Malfunction Detection Malfunction When the correct communication is not conducted in certain period.

  • Page 200: P1" Outdoor Unit: High Voltage Of Capacitor In

    3.40 “ ” Outdoor Unit: High Voltage of Capacitor in Main Inverter Circuit Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Malfunction is detected according to the voltage waveform of main circuit capacitor built in the inverter. Malfunction Detection Malfunction When the aforementioned voltage waveform becomes identical with the waveform of the power supply open phase.

  • Page 201: Low Pressure Drop Due To Refrigerant Shortage Or Electronic Expansion Valve Failure

    ” Low Pressure Drop Due to Refrigerant Shortage or Electronic Expansion Valve Failure Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Short of gas malfunction is detected by discharge pipe temperature thermistor and low pressure saturation temperature. Malfunction Detection Malfunction Microcomputer judge and detect if the system is short of refrigerant.
  • Page 202 Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Low pressure Cooling Out of gas, closing of stop is 0.25 MPa or less.

  • Page 203: Power Supply Insufficient Or Instantaneous Failure

    3.42 “ ” Power Supply Insufficient or Instantaneous Failure Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Detection of voltage of main circuit capacitor built in the inverter and power supply voltage. Malfunction Detection Malfunction When the abnormal voltage of main circuit capacitor built in the inverter and abnormal power supply voltage are detected.
  • Page 204 Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Have the power supply voltages between L1 and L2, L2 and L3, and L1 and L3 fallen within the range of Correct the power supply...

  • Page 205: Check Operation Not Executed

    Troubleshooting by Indication on the Remote Controller “ ” 3.43 Check Operation not Executed Remote Controller Display Applicable U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Check operation is executed or not Malfunction Detection Malfunction Malfunction is decided when the unit starts operation without check operation. Decision...

  • Page 206: Malfunction Of Transmission Between Indoor Units And Outdoor Units

    Malfunction of Transmission between Indoor Units and Outdoor Units Remote Controller Display Applicable AII indoor unit models U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Microcomputer checks if transmission between indoor and outdoor units is normal. Malfunction Detection Malfunction When transmission is not carried out normally for a certain amount of time...
  • Page 207 Panasonic Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. the indoor or outdoor unit PC board been replaced, or has the indoor - outdoor...

  • Page 208: U5" Malfunction Of Transmission Between Remote Controller And Indoor Unit

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Remote Controller 3.45 “ ” Malfunction of Transmission between Remote Controller and Indoor Unit Remote Controller Display Applicable AII indoor unit models Models Method of In case of controlling with 2-remote controller, check the system using microcomputer is signal transmission between indoor unit and remote controller (main and sub) is normal.

  • Page 209: Malfunction Of Transmission Between Main And Sub Remote Controllers

    Panasonic Troubleshooting by Indication on the Remote Controller 3.46 “ ” Malfunction of Transmission between Main and Sub Remote Controllers Remote Controller Display Applicable AII indoor unit models Models Method of In case of controlling with 2-remote controller, check the system using microcomputer if signal transmission between indoor unit and remote controller (main and sub) is normal.

  • Page 210: Malfunction Of Transmission Between Indoor And Outdoor Units In The Same System

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Remote Controller 3.47 “ ” Malfunction of Transmission between Indoor and Outdoor Units in the Same System Remote Controller Display Applicable AII indoor unit models Models Method of Malfunction Detection...
  • Page 211 Panasonic Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. " " has been displayed for 2 Re-diagnose by display after minutes or more.

  • Page 212: Ua" Excessive Number Of Indoor Units

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Remote Controller 3.48 “ ” Excessive Number of Indoor Units Remote Controller Display Applicable AII indoor unit models Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Excess of connected indoor units Defect of outdoor unit PC board (A1P)

  • Page 213: Uc" Address Duplication Of Central Remote Controller

    Panasonic Troubleshooting by Indication on the Remote Controller 3.49 “ ” Address Duplication of Central Remote Controller Remote Controller Display Applicable AII indoor unit models Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Address duplication of centralized remote controller...

  • Page 214: Ue" Malfunction Of Transmission Between Central Remote Controller And Indoor Unit

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Remote Controller 3.50 “ ” Malfunction of Transmission between Central Remote Controller and Indoor Unit Remote Controller Display Applicable AII indoor unit models Centralized controller Models Method of Microcomputer checks if transmission between indoor unit and centralized remote controller is normal.
  • Page 215 Panasonic Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. an indoor unit once connected been remove Reset power supply or its address...

  • Page 216: Uf" System Is Not Set Yet

    Remote Controller Display Applicable All models of indoor units U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of On check operation, the number of indoor units in terms of transmission is not corresponding to that of indoor units that have made changes in temperature.

  • Page 217: Uh" Malfunction Of System, Refrigerant System Address Undefined

    3.52 “ ” Malfunction of System, Refrigerant System Address Undefined Remote Controller Display Applicable AII indoor unit models U-4..6ML5DPQ, U-4..6ML5XPQ Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Improper connection of transmission wiring between outdoor unit and outdoor unit outside...

  • Page 218: Troubleshooting By Indication On The Centralized Remote Controller

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Centralized Remote Controller 4. Troubleshooting by Indication on the Centralized Remote Controller “ ” Malfunction of Transmission between Centralized Remote Controller and Indoor Unit Remote Controller Display Applicable AII indoor unit models...

  • Page 219: M1" Pc Board Defect

    Panasonic Troubleshooting by Indication on the Centralized Remote Controller “ ” PC Board Defect Remote Controller Display Applicable Centralized remote controller Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Defect of central remote controller PC board Causes Troubleshooting Replace the central remote controller PC board.

  • Page 220: Malfunction Of Transmission Between Optional Controllers For Centralized Control

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Centralized Remote Controller “ ” Malfunction of Transmission between Optional Controllers for Centralized Control Remote Controller Display Applicable Centralized remote controller Models Method of Malfunction Detection Malfunction Decision Conditions...

  • Page 221: Ma" Improper Combination Of Optional Controllers For Centralized Control

    Panasonic Troubleshooting by Indication on the Centralized Remote Controller “ ” Improper Combination of Optional Controllers for Centralized Control Remote Controller Display Applicable Centralized remote controller Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Improper combination of optional controllers for centralized control...
  • Page 222 Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Centralized Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Cannot be used in combination with a wiring the wiring adaptor for adaptor for electrical...

  • Page 223: Mc" Address Duplication, Improper Setting

    Panasonic Troubleshooting by Indication on the Centralized Remote Controller “ ” Address Duplication, Improper Setting Remote Controller Display Applicable Centralized remote controller Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Address duplication of centralized remote controller Causes Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred.

  • Page 224: Troubleshooting By Indication On The Unified On/Off Controller

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Unified ON/OFF Controller 5. Troubleshooting by Indication on the Unified ON/ OFF Controller Operation Lamp Blinks Remote Operation lamp blinks Controller Display Applicable All models of indoor units Unified ON/OFF controller Models Method of...
  • Page 225 Panasonic Troubleshooting by Indication on the Unified ON/OFF Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is a malfunction code displayed on the Diagnose the cause with the...

  • Page 226: Display "Under Host Computer Integrate Control" Blinks (Repeats Single Blink)

    Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Unified ON/OFF Controller Display “Under Host Computer Integrate Control” Blinks (Repeats Single Blink) Remote “under host computer integrated control” (Repeats single blink) Controller Display Applicable Unified ON/OFF controller Central controller, Schedule timer Models Method of...
  • Page 227 Panasonic Troubleshooting by Indication on the Unified ON/OFF Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Has a once connected optional controller for centralized Reset power supply...
  • Page 228 Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Unified ON/OFF Controller Is the wiring adaptor for Cannot be used in electrical appendices combination with a wiring connected? adaptor for electrical appendices. Remove the wiring adaptor for electrical appendices and reset the power supply for all optional controllers for centralized...

  • Page 229: Display "Under Host Computer Integrate Control" Blinks (Repeats Double Blink)

    Panasonic Troubleshooting by Indication on the Unified ON/OFF Controller Display “Under Host Computer Integrate Control” Blinks (Repeats Double Blink) Remote “under host computer integrated control” (Repeats double blink) Controller Display Applicable Unified ON/OFF controller Models Method of Malfunction Detection Malfunction...
  • Page 230 Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Unified ON/OFF Controller [CHECK 1] Check for causes of rise in high pressure Referring to the Fault Tree Analysis (FTA) shown below, probe the faulty points. ←Check to be sure the stop valve is open.
  • Page 231 Panasonic Troubleshooting by Indication on the Unified ON/OFF Controller [CHECK 2] Check for causes of drop in low pressure Referring to the Fault Tree Analysis (FTA) shown below, probe the faulty points. [In cooling] ←Are the electrical characteristics normal? Faulty low pressure sensor (See *1.)
  • Page 232 Urban Multi ML5 · Mini UM · Heat Pump Troubleshooting by Indication on the Unified ON/OFF Controller [CHECK 3] Check for Fan Motor Connector (1) Turn the power supply off. (2) With the fan motor connector on motor side disconnected, measure the resistance between each pin, then make sure that the resistance is more than the value mentioned in the following table.

  • Page 233: Part 8 Appendix

    Panasonic Part 8 Appendix 1. Piping Diagrams..................222 1.1 Outdoor Unit ..................222 1.2 Indoor Unit....................224 2. Wiring Diagrams..................227 2.1 Outdoor Unit ..................227 2.2 Field Wiring ..................229 2.3 Indoor Unit....................231 3. Option List ...................246 3.1 Option List of Controllers..............246 3.2 Option List of Outdoor Unit..............248 4.

  • Page 234: Piping Diagrams

    Urban Multi ML5 · Mini UM · Heat Pump Piping Diagrams 1. Piping Diagrams Outdoor Unit U-4, 5, 6ML5XPQ Appendix...
  • Page 235 Panasonic Piping Diagrams U-4, 5, 6ML5DPQ Appendix...

  • Page 236: Indoor Unit

    Urban Multi ML5 · Mini UM · Heat Pump Piping Diagrams Indoor Unit LM3, UM4, YM3, DM3, FM3, EM3, TM3, KM3, PM3, RM3 Gas piping connection port Heat exchanger Flare connection : φ15.9 or less Attached piping : Above φ19.1 Liquid piping connection port (Flare connection) Electronic...
  • Page 237 Panasonic Piping Diagrams 4D043864H Refrigerant pipe connection port diameters (mm) Model Liquid φ12.7 φ6.4 20 / 25 NM3 Appendix...
  • Page 238 Urban Multi ML5 · Mini UM · Heat Pump Piping Diagrams Appendix...

  • Page 239: Wiring Diagrams

    Panasonic Wiring Diagrams 2. Wiring Diagrams Outdoor Unit U-4, 5, 6ML5XPQ Appendix...
  • Page 240 Urban Multi ML5 · Mini UM · Heat Pump Wiring Diagrams U-4, 5, 6ML5DPQ Appendix...

  • Page 241: Field Wiring

    Panasonic Wiring Diagrams Field Wiring U-4, 5, 6ML5XPQ Appendix...
  • Page 242 Urban Multi ML5 · Mini UM · Heat Pump Wiring Diagrams U-4, 5, 6ML5DPQ Appendix...

  • Page 243: Indoor Unit

    Panasonic Wiring Diagrams Indoor Unit S-20, 25, 32, 63LM3HPQ Appendix...
  • Page 244 Urban Multi ML5 · Mini UM · Heat Pump Wiring Diagrams S-40, 50, 80, 125LM3HPQ Appendix...
  • Page 245 Panasonic Wiring Diagrams S-20, 25, 32, 40, 50, 63, 80, 100, 125UM4JPQ Appendix...
  • Page 246 Urban Multi ML5 · Mini UM · Heat Pump Wiring Diagrams S-20, 25, 32, 40, 50YM3HPQ Appendix...
  • Page 247 Panasonic Wiring Diagrams S-25, 32, 40, 63DM3HPS Appendix...
  • Page 248 Urban Multi ML5 · Mini UM · Heat Pump Wiring Diagrams S-20, 25NM3HPQ Appendix...
  • Page 249 Panasonic Wiring Diagrams S-20, 25, 32, 40, 50, 63FM3HPQ Appendix...
  • Page 250 Urban Multi ML5 · Mini UM · Heat Pump Wiring Diagrams S80, 100, 125FM3HPQ Appendix...
  • Page 251 Panasonic Wiring Diagrams S-40, 50, 63, 80, 100, 125EM3HPS Appendix...
  • Page 252 Urban Multi ML5 · Mini UM · Heat Pump Wiring Diagrams S-32, 63, 100TM3JPR Appendix...
  • Page 253 Panasonic Wiring Diagrams S-20, 25, 32, 40, 50, 63KM3HPR Appendix...
  • Page 254 Urban Multi ML5 · Mini UM · Heat Pump Wiring Diagrams S-20, 25, 32, 40, 50, 63PM3HPS S-20, 25, 32, 40, 50, 63RM3HPS Appendix...
  • Page 255 Panasonic Wiring Diagrams Appendix...
  • Page 256 Urban Multi ML5 · Mini UM · Heat Pump Wiring Diagrams Appendix...
  • Page 257 Panasonic Wiring Diagrams Appendix...

  • Page 258: Option List

    Urban Multi ML5 · Mini UM · Heat Pump Option List Option List Option List of Controllers Operation Control System Optional Accessories Type Item Wired remote control CZ-02RT11P CZ-02RWU12P CZ-01RWY12P CZ-01RWL12P CZ-02RWD12P CZ-02RWF12P CZ-02RWF12P CZ-02RWT12P CZ-01RWK12P CZ-02RWF12P Infrared remote control —...
  • Page 259 Panasonic Option List Appendix...

  • Page 260: Option List Of Outdoor Unit

    Urban Multi ML5 · Mini UM · Heat Pump Option List Option List of Outdoor Unit U-4..6ML5DPQ, U-4..6ML5XPQ U-4ML5XPQ U-4ML5DPQ U-5ML5XPQ U-5ML5DPQ Optional accessories U-6ML5XPQ U-6ML5DPQ CZ-02RD12P Cool/Heat Selector K-JB111A Fixing box CZ-P29HK32Q Refnet header CZ-P20BK32Q Refnet joint K-KPJ5F180 Central drain plug...

  • Page 261: Example Of Connection

    Panasonic Example of Connection 4. Example of Connection Example of connection Branch with refnet joint Branch with refnet joint and refnet header Branch with refnet header (Connection of 8 indoor units Heat pump system) indoor unit refnet joint refnet header...
  • Page 262 Urban Multi ML5 · Mini UM · Heat Pump Example of Connection Appendix...

  • Page 263: Thermistor Resistance / Temperature Characteristics

    Panasonic Thermistor Resistance / Temperature Characteristics Thermistor Resistance / Temperature Characteristics Indoor unit For air suction For liquid pipe For gas pipe Outdoor unit For outdoor air Outdoor unit for fin thermistor For suction pipe 1 For heat exchanger R4T, R6T...
  • Page 264 Urban Multi ML5 · Mini UM · Heat Pump Thermistor Resistance / Temperature Characteristics Outdoor Unit Thermistors for Discharge Pipe (R2T) (kΩ) T°C T°C T°C 640.44 624.65 72.32 70.96 13.35 13.15 609.31 594.43 69.64 68.34 12.95 12.76 579.96 565.78 67.06 65.82 12.57 12.38...

  • Page 265: Pressure Sensor

    Panasonic Pressure Sensor Pressure Sensor = 1.38V-0.69 : Detected Pressure [High Side] MPa = 0.57V-0.28 : Detected Pressure [Low Side] MPa : High pressure (MPa) : Output Voltage [High Side] V Detected Pressure : Low pressure (MPa) : Output Voltage [Low Side] V...

  • Page 266: Method Of Replacing The Inverter's Power Transistors Modules

    Urban Multi ML5 · Mini UM · Heat Pump Method of Replacing the Inverter’s Power Transistors Modules Method of Replacing the Inverter’s Power Transistors Modules Checking failures in power semiconductors mounted on inverter PC board Check the power semiconductors mounted on the inverter PC board by the use of a multiple tester.
  • Page 267 Panasonic Method of Replacing the Inverter’s Power Transistors Modules Inverter PC board (U-4, 5, 6ML5DPQ) C– Appendix...
  • Page 268 Urban Multi ML5 · Mini UM · Heat Pump Method of Replacing the Inverter’s Power Transistors Modules Power module checking When using the digital type of multiple tester, make measurement in diode check mode. Tester terminal Criterion Remark Not less than 0.3V It may take time to (including ∞)* determine the voltage...

  • Page 269: Precautions For New Refrigerant (R-410A)

    Panasonic Part 9 Precautions for New Refrigerant (R-410A) 1. Precautions for New Refrigerant (R-410A) .........258 1.1 Outline ....................258 1.2 Refrigerant Cylinders................260 1.3 Service Tools..................261 Precautions for New Refrigerant (R-410A)

  • Page 270: Precautions For New Refrigerant (R-410A)

    Urban Multi ML5 · Mini UM · Heat Pump Precautions for New Refrigerant (R-410A) Precautions for New Refrigerant (R-410A) Outline 1.1.1 About Refrigerant R-410A Characteristics of new refrigerant, R-410A 1. Performance Almost the same performance as R-22 and R-407C 2. Pressure Working pressure is approx.
  • Page 271 Panasonic Precautions for New Refrigerant (R-410A) Thermodynamic characteristic of R-410A Temperature Steam pressure Density Specific heat at constant Specific enthalpy Specific entropy (kPa) (kg/m pressure (kJ/kgK) (kJ/kg) (kJ/KgK) Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor Precautions for New Refrigerant (R-410A)

  • Page 272: Refrigerant Cylinders

    Urban Multi ML5 · Mini UM · Heat Pump Precautions for New Refrigerant (R-410A) Refrigerant Cylinders Cylinder specifications 2 The cylinder is painted refrigerant color (pink). 2 The cylinder valve is equipped with a siphon tube. Cylinder Refrigerant can be charged in liquid state with cylinder in upright position.

  • Page 273: Service Tools

    Panasonic Precautions for New Refrigerant (R-410A) Service Tools R-410A is used under higher working pressure, compared to previous refrigerants (R-22,R-407C). Furthermore, the refrigerating machine oil has been changed from Suniso oil to Ether oil, and if oil mixing is occurred, sludge results in the refrigerants and causes other problems.
  • Page 274 Urban Multi ML5 · Mini UM · Heat Pump Precautions for New Refrigerant (R-410A) 1. Flaring tool Flare gauge Specifications 2 Dimension A Unit:mm Tube O.D. −0.4 Nominal size Class-2 (R-410A) Class-1 (Conventional) 6.35 9.52 13.2 13.0 12.70 16.6 16.2 15.88 19.7 19.4...
  • Page 275 Panasonic Precautions for New Refrigerant (R-410A) 2. Torque wrench Specifications 2 Dimension B Unit:mm Nominal size Class-1 Class-2 Previous No change in tightening torque No change in pipes of other sizes Differences 2 Change of dimension B Only 1/2", 5/8" are extended...
  • Page 276 Urban Multi ML5 · Mini UM · Heat Pump Precautions for New Refrigerant (R-410A) 4. Leak tester Specifications 2 Hydrogen detecting type, etc. 2 Applicable refrigerants R-410A, R-407C, R-404A, R-507A, R-134a, etc. Differences 2 Previous testers detected chlorine. Since HFCs do not contain chlorine, new tester detects hydrogen.
  • Page 277 Panasonic Precautions for New Refrigerant (R-410A) 2 Temperature scale indicates the relationship between pressure and temperature in gas saturated state. Differences 2 Change in pressure 2 Change in service port diameter 7. Charge hose for R-410A (Hose with ball valve) Specifications 2 Working pressure 5.08 MPa (51.8 kg/cm...
  • Page 278 Urban Multi ML5 · Mini UM · Heat Pump Precautions for New Refrigerant (R-410A) 9. Weigher for refrigerant charge Specifications 2 High accuracy TA101A (for 10-kg cylinder) = ± 2g TA101B (for 20-kg cylinder) = ± 5g 2 Equipped with pressure-resistant sight glass to check liquid refrigerant charging. 2 A manifold with separate ports for HFCs and previous refrigerants is equipped as standard accessories.

  • Page 279: Index

    Panasonic Index Electrical and Functional Parts Outdoor Unit ........... 30 A0 .................142 Electronic Expansion Valve PI Control ....51 A1 .................143 Error of External Protection Device ..... 142 A3 .................144 Excessive Number of Indoor Units ...... 200 A6 .................146 A7 .................147 A8 .................149...
  • Page 280 Urban Multi ML5 · Mini UM · Heat Pump M1 ................207 Oil Return Operation ..........54 M8 ................208 Operation Lamp Blinks ........212 MA ................209 Operation Mode ............ 48 Malfunction code indication by outdoor unit Operation when Power is Turned On ....85 PC board ............138 Option List ............
  • Page 281 Panasonic Drawings & Flow Charts abnormal discharge pipe temperature ....172 high pressure protection control ......60 abnormal power supply voltage ......149 high voltage of capacitor in main inverter actuation of high pressure switch ......164 circuit ............188 actuation of low pressure sensor ......166 address duplication of central remote controller ...........201...
  • Page 282 Urban Multi ML5 · Mini UM · Heat Pump malfunction of transmission between centralized wireless remote controller - indoor unit ....89 CZ-01RW type ..........89 remote controller and indoor unit ....206 CZ-02RW type ..........89 malfunction of transmission between indoor and outdoor units in the same system ....198 wiring diagrams ...........

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