Page 1: Table Of Contents
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS No. OCT04 REVISED EDITION-A R410A SERVICE TECHNICAL GUIDE <Indoor unit> [Model names] [Service Ref.] PLA-RP·AA Revision: PLA-RP·AA • PKA-RP•GAL, PKA-RP•FAL, PLA-RP·AA PCA-RP•GA, PEAD-RP•GA, PUHZ-RP•VHA PLA-RP·AA.UK PUHZ-RP•VHA -A are added in PLA-RP·AA REVISED EDITION-A. • Please void OCT04. PKA-RP·GAL PKA-RP·GAL PKA-RP·FAL...
Page 2: Pairing Table Of The Indoor And Outdoor Unit
PAIRING TABLE OF THE INDOOR AND OUTDOOR UNITS Outdoor unit Indoor unit Heat pump type PUHZ-RP Service Service Ref. Manual No. · PEAD-RP EA.UK — · PEAD-RP · — — — — — PEAD-RP GA.UK · OC293 PLA-RP · REVISED EDITION-B PLA-RP ·...
Page 3: Specifications For Electrical Work
SPECIFICATIONS FOR ELECTRICAL WORK 2-1. Field electrical wiring(power wiring specifications) PUHZ-RP•VHA PUHZ-RP•VHA-A Indoor unit model RP1.6, 2V RP2.5, 3V RP4, 5V RP6V ~ / N (Single) 50Hz, Outdoor unit power supply 220-230-240V Outdoor unit input capacity Main switch (Breaker) 2 o Min. 1.5 2 o Min.
Page 4 2-2. M-NET wiring method (Points to notice) (1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from making an influence on the signal communication. Place them at intervals of more than 5cm. Do not put them in the same conduit tube.
Page 5 M-NET wiring M-NET (1) Use 2-core x 1.25mm shield wire for electric wires. terminal Ground (Excluding the case connecting to system controller.) block wire (2) Connect the wire to the M-NET terminal block.Connect one core of the transmission wire (non-polar) to A terminal and the other to B. Peel the shield wire, twist the shield part to a string and connect it to S terminal.
Page 6: Wiring Diagram
WIRING DIAGRAM PLA-RP1.6AA PLA-RP2AA PLA-RP2.5AA PLA-RP1.6AA.UK PLA-RP2AA.UK PLA-RP2.5AA.UK PLA-RP3AA PLA-RP4AA PLA-RP5AA PLA-RP6AA PLA-RP3AA PLA-RP4AA PLA-RP5AA PLA-RP6AA PLA-RP3AA.UK PLA-RP4AA.UK PLA-RP5AA.UK PLA-RP6AA.UK PLA-RP3AA PLA-RP4AA PLA-RP5AA PLA-RP6AA [LEGEND] SYMBOL NAME SYMBOL NAME SYMBOL NAME INDOOR POWER BOARD VANE MOTOR WIRELESS REMOTE CONTROLLER BOARD FUSE (4A) DRAIN PUMP RECEIVING UNIT...
Page 7 PKA-RP1.6GAL PKA-RP2GAL INDOOR UNIT CN2S(WHT) DC14V TO OUTDOOR UNIT CONT.BOARD OUTDOOR CN02(WHT) CN01(BLU) POWER VANE CN6V CN03 POWER (WHT) (RED) (WHT) CN2D(WHT) CN41 CN2L WIRELESS CN90 CN25 CN32 (WHT) LED3 LED2 LED1 D.SENSOR HEATER INTAKE LIQUID PIPE REMOCON CN31 CN24...
Page 8 PKA-RP2.5FAL PKA-RP3FAL PKA-RP4FAL SYMBOL NAME SYMBOL NAME SYMBOL NAME INDOOR POWER BOARD CAPACITOR(FAN MOTOR) WIRELESS REMOTE CONTROLLER BOARD FUSE(4A) FAN MOTOR RECEIVING UNIT VARISTOR VANE MOTOR BUZZER INDOOR CONTROLLER BOARD TERMINAL BLOCK(INDOOR/OUTDOOR LED1 LED(RUN INDICATOR) CN2L CONNECTOR(LOSSNAY) CONNECTING LINE) LED2 LED(HOT ADJUST) CN32 CONNECTOR(REMOTE SWITCH)
Page 9 PCA-RP2GA PCA-RP2.5GA PCA-RP3GA PCA-RP4GA PCA-RP5GA PCA-RP6GA SYMBOL NAME SYMBOL NAME SYMBOL NAME INDOOR POWER BOARD VANE MOTOR WIRELESS REMOTE CONTROLLER BOARD(OPTION) FUSE(4A) DRAIN-UP MACHINE(OPTION) RECEIVING UNIT VARISTOR DRAIN SENSOR(OPTION) BUZZER INDOOR CONTROLLER BOARD TERMINAL BLOCK(INDOOR/OUTDOOR CONNECTING LINE) LED(RUN INDICATOR) LED1 CN2L CONNECTOR(LOSSNAY) TERMINAL BLOCK(REMOTE CONTROLLER...
Page 10 PEA-RP3EA.TH-A PEA-RP5EA.TH-A PEA-RP4EA.TH-A PEA-RP6EA.TH-A SYMBOL SYMBOL SYMBOL NAME NAME NAME INDOOR CONTROLLER BOARD INDOOR POWER BOARD CAPACITOR(FAN MOTOR) CN2L FAN MOTOR CONNECTOR(LOSSNAY) FUSE(4A) CN32 CONNECTOR(REMOTE SWITCH)) VARISTOR TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE) CN41 CONNECTOR(HA TERMINAL-A) REMOTE CONTROLLER BOARD LED1 POWER SUPPLY(I.B) CONNECTOR(PROGRAM TIMER) LED2 POWER SUPPLY(R.B) TERMINAL BLOCK(REMOTE...
Page 11 PEAD-RP1.6EA.UK PEAD-RP2EA.UK PEAD-RP2.5EA.UK PEAD-RP3EA.UK PEAD-RP4EA.UK PEAD-RP5EA.UK PEAD-RP6EA.UK PEAD-RP3EA PEAD-RP4EA PEAD-RP5EA PEAD-RP6EA...
Page 12 PEAD-RP2.5GA PEAD-RP3GA PEAD-RP4GA...
Page 13 PUHZ-RP1.6VHA PUHZ-RP2VHA PUHZ-RP2.5VHA PUHZ-RP3VHA PUHZ-RP3VHA-A W1 MODEL SELECT MODELS MODELS 1.6V 2.5V 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 W2 Only PUHZ-RP2.5, 3VHA.
Page 14 PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA PUHZ-RP4VHA-A PUHZ-RP5VHA-A PUHZ-RP6VHA-A PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA Only PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA W1 MODEL SELECT MODELS 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6...
Page 15: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM 4-1. Checking operation statuses PUHZ-RP • HA 4-1-1. Measurement points and items •The table and diagrams below show the measurement item for each measurement point, and the pressure and temperature near the ISO T1 standard operating conditions. •Measure the temperature and pressure of each part by following the descriptions in the table.
Page 16 PLA-RP1.6AA.UK PLA-RP2AA.UK PLA-RP2.5AA.UK PLA-RP3AA PLA-RP4AA PLA-RP5AA PLA-RP6AA PLA-RP3AA.UK PLA-RP4AA.UK PLA-RP5AA.UK PLA-RP6AA.UK PLA-RP3AA PLA-RP4AA PLA-RP5AA PLA-RP6AA PLA-RP3AA PLA-RP4AA PLA-RP5AA PLA-RP6AA PKA-RP1.6GAL PKA-RP2GAL PKA-RP2.5FAL PKA-RP3FAL PKA-RP4FAL PCA-RP2GA PCA-RP2.5GA PCA-RP3GA PCA-RP4GA PCA-RP5GA PCA-RP6GA PEA-RP3EA.TH-A PEA-RP4EA.TH-A PEA-RP5EA.TH-A PEA-RP6EA.TH-A PEAD-RP1.6EA.UK PEAD-RP2EA.UK PEAD-RP2.5EA.UK PEAD-RP3EA.UK PEAD-RP4EA.UK PEAD-RP5EA.UK PEAD-RP6EA.UK...
Page 17 PUHZ-RP1.6VHA PUHZ-RP2VHA Thermistor TH7 (Outdoor) Heat exchanger Stop valve Thermistor TH6 Service port (with service port) Solenoid valve (Outdoor 2-phase pipe) (Four-way valve) Refrigerant GAS pipe connection(1/2F) Strainer Thermistor TH3 (Outdoor pipe) Muffler Distributor High pressure switch 63H Thermistor TH4 (Discharge) Muffler Linear...
Page 18 PUHZ-RP4VHA PUHZ-RP4VHA-A PUHZ-RP5VHA PUHZ-RP5VHA-A PUHZ-RP6VHA PUHZ-RP6VHA-A Thermistor TH7 (Outdoor) Heat exchanger Thermistor TH6 Ball valve Solenoid valve Strainer (Outdoor 2-phase pipe) (Four-way valve) Refrigerant GAS pipe connection(5/8F) Thermistor TH3 Service port (Outdoor pipe) (High pressure) Muffler Service port (Low pressure) Distributor Low pressure switch 63L...
Page 19 4-3. Applicable extension pipe for each model 4-3-1. 1:1 system (a) Pipe length <Table 1> Pipe length for 1:1 system Liquid [6.35 [9.52 [12.7 pipe Thick- t0.8 t0.8 t0.8 (mm) ness [9.52 [12.7 [15.88 [12.7 [15.88 [19.05 [15.88 [19.05 pipe Thick- t0.8 t0.8...
Page 20 (c) Capacity correction Cooling and heating capacity is lowered according to pipe length. Capacity can be obtained by referring to the capacity curves below. When the diameter of gas pipe is one size smaller than standard diameter, cooling capacity is lowered com- paring to the standard diameter.
Page 21 3 3 Capacity curve for PUHZ-RP2.5, 3 models <When gas pipe is one size smaller than standard size> Heating RP2.5, RP3 Cooling RP2.5 Cooling RP3 Corrected pipe length 4 4 When gas pipe is one size larger than standard size for PUHZ-RP4, 5 and 6. 1 Capacity can be obtained by referring to capacity curves of standard size.
Page 22 4-3-2. Synchronized twin and triple (a) Pipe length Please note that refrigerant piping length, bend number and height difference of indoor units are specified for each unit combination. Note: Be sure to use our Multi-distributor for distributing pipe to use existing piping. <Table 5>...
Page 23 Synchronized twin Synchronized triple Branch Branch Branch Indoor Indoor Indoor pipe B pipe B pipe C unit unit unit Branch Branch Indoor Indoor pipe C pipe D unit unit Optional Optional distributing pipe distributing pipe Multi-distributor Multi-distributor Outdoor Outdoor Main Main unit unit...
Page 24: How To Check The Parts
HOW TO CHECK THE PARTS 5-1. INDOOR UNIT • Common parts Parts name Check points Room temperature Disconnect the connector then measure the resistance using a tester. thermistor (TH1) (Surrounding temperature 10:~30:) Pipe temperature thermistor/ liguid (TH2) Normal Abnormal (Refer to below for a detail.) Condenser/evaporator 4.3k"~9.6k"...
Page 25 Drain pump Measure the resistance between the terminals using a tester. (Winding temperature 20:) Normal Abnormal 290" Open or short PKA-RP1.6GAL PKA-RP2GAL Parts name Check points Fan motor (MF) Measure the resistance between the terminals using a tester. Relay connector...
Page 26 PCA-RP2GA PCA-RP2.5GA PCA-RP3GA PCA-RP4GA PCA-RP5GA PCA-RP6GA Parts name Check points Fan motor Measure the resistance between the terminals using a tester. Relay connector (Winding temperature 20:) Normal Motor terminal White Abnormal RP2.5, RP3 RP5, RP6 Relay connector Black Red – Black 70.6"...
Page 27 PEAD-RP1.6EA.UK PEAD-RP2EA.UK PEAD-RP2.5EA.UK PEAD-RP3EA.UK PEAD-RP4EA.UK PEAD-RP5EA.UK PEAD-RP6EA.UK PEAD-RP3EA PEAD-RP4EA PEAD-RP5EA PEAD-RP6EA Parts name Check points Fan motor (MF) Measure the resistance between the terminals using a tester. (Winding temperature 20:) PEAD-RP3EA Motor terminal Normal Black Abnormal PEAD-RP1.6, 2, 2.5EA.UK Relay connector PEAD-RP3EA Blue Gray –...
Page 28 5-2. OUTDOOR UNIT PUHZ-RP1.6HA PUHZ-RP2VHA PUHZ-RP2.5VHA PUHZ-RP3VHA PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA PUHZ-RP4VHA-A PUHZ-RP5VHA-A PUHZ-RP6VHA-A PUHZ-RP4VHA -A PUHZ-RP5VHA -A PUHZ-RP6VHA Parts name Check points Disconnect the connector then measure the resistance using a tester. Thermistor (TH3) (Surrounding temperature 10:~30:) <Outdoor pipe>...
Page 29 5-3. COMPRESSOR TECHNICAL DATA (at 20°C) Unit PUHZ-RP1.6,2VHA PUHZ-RP2.5,3VHA PUHZ-RP4,5,6VHA ANV33FDAMT Compressor model SNB130FLBH TNB220FMBH 0.266 0.300 ~ 0.340 0.865 ~ 0.895 Winding 0.266 0.300 ~ 0.340 0.865 ~ 0.895 Resistance ( " ) 0.266 0.300 ~ 0.340 0.865 ~ 0.895...
Page 30 HOW TO CHECK THE COMPONENTS <Thermistor feature chart> Low temperature thermistors • Thermistor <Outdoor pipe> (TH3) • Thermistor <Outdoor 2-phase pipe> (TH6) • Thermistor <Outdoor> (TH7) Thermistor R0 = 15k' ± 3% B constant = 3480K ± 2% =15exp{3480( 273+t – 273 )} 15k' 4.3k' 9.6k'...
Page 31 Linear expansion valve (1) Operation summary of the linear expansion valve. • Linear expansion valve open/close through stepping motor after receiving the pulse signal from the outdoor controller board. • Valve position can be changed in proportion to the number of pulse signal. <Connection between the outdoor controller board and the linear expansion valve>...
Page 32 (3) How to attach and detach the coil of linear expansion valve <Composition> Linear expansion valve is separable into the main body and the coil as shown in the diagram below. Main body Coil Lead wire Stopper <How to detach the coil> Hold the lower part of the main body (shown as A) firmly so that the main body does not move and detach the coil by pulling it upward.
Page 33: Microprocessor Control
MICROPROCESSOR CONTROL 6-1. System construction (1) System construction A-control model which just wires the connecting line between the indoor and outdoor unit and supply the power is applicable to any models of standard (1:1), twin and triple. (Refer to 2 Start-up system.) Standard 1:1 Synchronized twin.
Page 34 (2) The transmitting specification for “A” control 1Wiring regulations Section Communications from remote controllers Communications between indoor and outdoor units The maximum length of 500m 80m (Including the wiring among indoor units total wiring in addition to the wiring between indoor and outdoor units) The maximum numbers One remote controller can connect and operate...
Page 35 (3) The waveforms of from remote controller communications The following graphs are the examples for measuring waveforms on the wirings of remote controlled transmission at the terminal block for remote controller. a) A measuring example in the sequence of startup b) A measuring example during normal stop seconds seconds...
Page 36 (4) The waveforms of communications between indoor and outdoor units The following graphs are the examples for measuring waveforms on the wirings of connecting indoor and outdoor units at between S2 and S3 of the outdoor terminal block TB1. a) A measuring example the sequence of startup: 1 b) A measuring example in the sequence of startup: 2 Transmission Transmission...
Page 37 (5) Start-up system A control unit is applicable to any models of standard (1:1), twin and triple without switch setting according to carrying out the below process automatically when the power is supplied. When the power is supplied, following processes of 1 Refrigerant address transmitting, 2 Power supply control to remote controller, 3 Set number of the connected unit, 4 Set number of the indoor unit, 5 Duplication detection, 6 Collecting the unit information and 7 Collecting the operation data are carried out as shown on the figure.
Page 38 Function/control specifications 4-way ceiling cassette Ceiling concealed Item PLA-RP•AA PEA-RP•EA PEAD-RP•EA PEAD-RP•GA Number of fan speed Drive method Pulsation Tap-changing Tap-changing Tap-changing (AC motor) (AC motor) (AC motor) (AC motor) Up/down Provided — — — auto vane — — — Swing function Shutter mechanism —...
Page 39: Indoor Unit Control
INDOOR UNIT CONTROL 7-1. COOL operation Control modes Control details Remarks w1 The thermoregulating 1-1. Thermoregulating function (Function to prevent restarting for 3 minutes) 1. Compressor function is provided in the • Room temperature ] desired temperature +1:···Compressor ON outdoor unit. •...
Page 40 Control modes Remarks Control details 3-1. Drain pump control 3. Drain pump •Always drain pump ON during the COOL and DRY mode operation. (Regardless of the compressor ON/ OFF) •When the operation mode has changed from the COOL or DRY to the others (including Stop), OFF the control after the drain pump ON for 3 minutes.
Page 41 7-2. DRY operation Control modes Remarks Control details 1-1. Thermoregulating function (Function to prevent restarting for 3 minutes) 1. Compressor The thermoregulating Setting the compressor operation time by the thermoregulating signal function is provided in and the room temperature (TH1). the outdoor unit.
Page 42 7-4. HEAT operation Control modes Remarks Control details 1. Compressor 1-1. Thermoregulating function (Function to prevent restarting for 3 minutes) The thermoregulating function is • Room temperature [ desired temperature-1: ···Compressor ON provided in the outdoor unit. • Room temperature ] desired temperature ···Compressor OFF The indoor unit transmits the indoor room temperature and set temperature data to outdoor unit, then the outdoor...
Page 43 Control modes Control details Remarks Controlled by the remote controller (4-speed or 2-speed) 3. Fan Give priority to under-mentioned controlled mode Fan speed change notch 3-1. Hot adjuster mode Refer to the model function table 3-2. Preheating exclusion mode 3-3. Thermostat OFF mode (When the compressor off by the thermoregulating) 3-4.
Page 44 Control modes Control details Remarks 4. Drain pump 4-1. Drain pump control The drain pump turns ON for the specified amount of time when any of the following conditions is met (regardless of whether the compressor is ON or OFF). Ö1 ON for 3 minutes after the operation mode is switched from COOL or DRY to another operation mode (HEAT mode).
Page 45 7-5. AUTO operation Control modes Control details Remarks This mode is provide in the outdoor unit. HEAT mode for room temperature < Desired temperature 1. Initial value of COOL mode for room temperature ] Desired temperature The indoor unit follows the instruction operation mode from the outdoor unit.
Page 46 7-7. TIMER operation Available Timer-Interlocked Operation Modes 1. AUTO START/STOP:Allows both start and shutdown to be interlocked with the timer. 2. AUTO START: Allows automatic start in response to the timer setting and shutdown to be proceeded by manually pressing the ON/OFF but- ton.
Page 47: Outdoor Unit Control
OUTDOOR UNIT CONTROL 8-1. COOL operation Control modes Control details Remarks 1-1. Thermoregulating function 1. Compressor The outdoor unit receives information of set temperature and intake temperature from the indoor unit through transmission and judges the necessity of thermoregulating from their temperature difference. (Refer to “INDOOR UNIT CONTROL”...
Page 48 From the previous page. Control modes Control details Remarks 1-6. Discharge temperature over-rise prevention control 1. Compressor Frequency controls such as Hz-down and no more Hz-up will be conducted according to the discharge temperature (TH4). Temperature restriction: No more Hz-up ··· When TH4 detects 105: or more Hz-down ···...
Page 49 Control modes Control details Remarks 3-1. Normal control 3. LEV(A) Opening pulse will vary among steps (1 to 3) according to air conditioner’s operating status. • Control timing: Once every 5 minutes after 3 or 7 minutes have passed since the compressor started.
Page 50 Control modes Control details Remarks 4-1. Normal control 4. LEV(B) LEV opening pulse will be controlled according to the change of compressor operating frequency and regulated every minute to adjust the discharge temperature to let the intake super heat temperature be 0: to 5:. •...
Page 51 8-2. HEAT operation Control modes Control details Remarks 1-1. Thermoregulating function Refer to 1. Compressor The outdoor unit receives information of set temperature and intake temperature “INDOOR UNIT from the indoor unit through transmission and judges the compressor ON/OFF CONTROL” for controlled by thermoregulating from their temperature difference.
Page 52 Control modes Control details Remarks 2-1. Normal control 2. Fan Step (N)—Rotation Fan rotation times (rpm) will be controlled according to the outdoor outside times(rpm) Step Rotation times(rpm) temperature (TH7). RP1.6, 2 RP2.5, 3 RP4-6 • Control method: Inverter control •...
Page 53 Control modes Control details Remarks 4-1. Normal control 4. LEV(A) LEV opening pulse will be controlled every minute to adjust the discharge temperature in order to let the intake super heat temperature be 0: to 5:. • Control timing: Once per minute after 3 or 7 minutes have passed since the compressor started.
Page 54 Control modes Control details Remarks 5-1. Normal control 5. LEV(B) Opening pulse will vary among steps (1 to 3) according to air conditioner’s operating status. • Control timing: Once every 5 minutes after 3 or 7 minutes have passed since the compressor started.
Page 55 Control modes Control details Remarks 6-1. Normal control 6. Four way valve Always OFF during normal operation. 6-2. Change of Operation mode • When the mode changes from HEAT to COOL: COOL Operation mode HEAT Four way valve • When the operation stops in HEAT mode: HEAT Operation mode Stop...
Page 56 8-3. DRY operation Control modes Control details Remarks 1-1. Thermoregulating function Refer to “INDOOR 1. Compressor The outdoor unit receives information of set temp. and intake temp. from the UNIT CONTROL” indoor unit through transmission and judges the compressor ON/OFF with for ON/OFF thermoregulating function from their temperature difference.
Page 57 8-4. FAN operation Control modes Control details Remarks Always OFF 1. Compressor Always OFF 2. Fan Always OFF 3. Four way valve 8-5. Defrosting operation Control modes Control details Remarks 1-1. Requirements for starting w Refer to the 1. Start Defrosting starts when either of below conditions is satisfied.
Page 58 From the previous page. Control modes Control details Remarks 2-2. Actuator at the end of defrosting operation 2. Stop Actuator will be activated by the following procedure if any of the above conditions except d & e is detected. 1 Start the outdoor fan. 2 Let the compressor operation frequency down to 30Hz from the defrosting operation frequency.
Page 59 8-6. AUTO operation Control modes Control details Remarks When a operation mode turns into AUTO operation; 1. Initial operation mode 1 HEAT mode will be operated if intake temperature < set temperature 2 COOL mode will be operated if intake temperature ] set temperature 1 HEAT mode will turn into COOL mode when intake temperature ] set temperature + 2deg 2.
Page 60 Control modes Control details Remarks 2-1. Frequency is restricted by the compressor electrical current (CT1). W Hz-down amount: 2. Frequency Frequency control such as Hz-down and no more Hz-up will be conducted -5Hz per minute according to the compressor electrical current (CT1). Models No more Hz-up Hz-down...
Page 61 8-8. Replacement operation (RP4 to 6V Only) Control modes Control details Remarks 1-1. Requirements for starting 1. Start and end of Replacement operation will start when SW8-2 on the outdoor controller board replacement is turned on while units are being stopped. operation w Normal air 1-2.
Page 62 8-9. Refrigerant collecting (pump down) Control modes Control details Remarks 1-1. Requirements for starting 1. Start and end of pump Pump down operation will be conducted when SWP on the outdoor controller down operation board is turned on while the unit is being stopped. w Low pressure 1-2.
Page 63: Dip Switch Function
PEA-RP • EA settings (SW1) PCA-RP • GA PEAD-RP • EA PKA-RP • GAL PEAD-RP • GA PKA-RP • FAL J21~J24 (SW2) Models J21 J22 J23 J24 PLA-RP1.6AA PKA-RP1.6GAL PEAD-RP1.6EA PLA-RP2AA PCA-RP2GA PKA-RP2GAL PEAD-RP2EA PLA-RP2.5AA PCA-RP2.5GA PKA-RP2.5FAL PEAD-RP2.5EA PEAD-RP2.5GA PLA-RP3AA, AA...
Page 64 9-2. Outdoor unit 9-2-1. Function of switches Type Action by the switch operation Function Effective timing Switch switch When compressor is working Compulsory defrosting Start Normal in heating operation. w Abnormal history clear Clear Normal off or operating 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6...
Page 65 Fixing method of the compressor operating frequency The compressor operating frequency can be fixed by setting the SW2 (a switch of “A Control Service Tool PAC-SK52ST) and turning on/off the SW5-1 on the controller board. However, the setting may not be fixed to the desired value in case of a couple of minutes right after the start-up, in case the operating frequency is limited to some extents by various restrictive controls such as the SW7-3 to 6 settings and in case the operating frequency is set to be out of the operating frequency range designated for each model.
Page 66 Special function (a) Low-level sound priority mode (Local wiring) Unit enters into Low-level sound priority mode by SW7-1, 2 and external signal input setting. Inputting external signals to the outdoor unit decreases the outdoor unit operation sound 3 to 4 dB lower than that of usual. Adding a commercial timer or on-off switch contactor setting to the CNDM connector which is optional contactor for Demand input located on the outdoor controller board enables to control compressor operation frequency.
Page 67 9-2-3. Optional parts A-control Service Tool [ PAC-SK52ST ] Function of switches (1) Function of switches Type of Action by the switch operation Switch Function Effective timing switches Changing of LED Under operation or display Operation monitor Operation monitor suspension DIP SW <Self-diagnosis>...
Page 68 <Outdoor unit operation monitor function> [When option part ‘A-Control Service Tool(PAC-SK52ST)’ is connected to outdoor controller board(CNM)] Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of error code by control- ling DIP SW2 on ‘A-Control Service Tool’. Operation indicator SW2 : Indicator change of self diagnosis Explanation for display...
Page 69 Explanation for display Unit SW2 setting Display detail Pipe temperature / Liquid(TH3) – 40~90 – 40~90 (When the coil thermistor detects 0: or below, “–” and temperature are displayed by turns.) (Example) When -10:; 2 3 4 5 6 0.5 secs. 0.5secs.
Page 70 Explanation for display Unit SW2 setting Display detail Pipe temperature / Liquid(TH3) on error – 40~90 occurring (When the coil thermistor detects 0: or below, “–” – 40~90 and temperature are displayed by turns.) (Example) When –15:; 0.5 secs. 0.5secs. 2 secs.
Page 71 SW2 setting Display detail Explanation for display Unit Outdoor unit setting information • The tens digit (Total display for applied setting) Setting details Display details H·P / Cooling only 0 : H·P 1 : Cooling only Single phase / Three phase 0 : Single phase 2 : Three phase Code •...
Page 72 SW2 setting Display detail Explanation for display Unit Outdoor pipe temperature / Cond./ -39~88 Eva. (TH6) (When the temperature is 0: or less, “–” and -39~88 temperature are displayed by turns.) 2 3 4 5 6 Outdoor outside temperature (TH7) -39~88 -39~88 (When the temperature is 0: or less, “–”...
Page 73 Explanation for display Unit SW2 setting Display detail Error postponement code history (2) Postponement code display of outdoor unit Blinking: During postponement Code Lighting: Cancellation of postponement display “00” is displayed in case of no postponement. 2 3 4 5 6 Error postponement code history (3) Postponement code display of outdoor unit...
Page 74 SW2 setting Display detail Explanation for display Unit -39~88 Outdoor pipe temperature / Cond./ Eva. (TH6) on error occurring (When the temperature is 0°C or less, “–” and -39~88 temperature are displayed by turns.) (Example) When –15°C; 0.5 secs. 0.5secs. 2 secs.
Page 75 Explanation for display Unit SW2 setting Display detail This code is referred to check the unit’s operating status. Compressor frequency control • Tens digit Code Compressor frequency control Primary current restriction control Secondary current restriction control • Ones digit Code Compressor frequency control Code Discharging temperature over-rise prevention control...
Page 76: Function Setting
FUNCTION SETTING Wired type 12 3 4 Mode number Setting number Refrigerant address Unit number CENTRALLY CONTROLLED 1Hr. Changing the power voltage setting ON OFF ˚C CLOCK CHECK • Be sure to change the power voltage setting depending on the voltage FILTER CHECK MODE ˚C...
Page 77 4 Setting the refrigerant address/unit number Press the E MODE button to designate the refrigerant address/unit num- ber. [--] will flash in the mode number (1) display momentarily (see dia- gram 4). FUNCTION If [88] appears in the room temperature section, the selected refrigerant address does not exist in the system.
Page 78 Wireless remote controller type Flow of function selection procedure The flow of the function selection procedure is shown below. This example shows how to turn off the function that raises the set temperature by 4 degrees during HEAT operation . The procedure is given after the flow chart.
Page 79 5 To select multiple functions continuously Repeat steps 3 and 4 to change multiple function settings continuously. 6 Complete function selection Direct the wireless remote controller toward the sensor of the indoor unit and button E. press the Note: Whenever changes are made to the function settings after construction or maintenance, be sure to record the added functions with an “...
Page 80 Table 2. Itemised functions of the entire refrigerant system (select unit number 00) Function Settings Mode No. Setting No. Check Remarks Power failure Not available automatic recovery Approx. 4-minute wait-period Available after power is restored. Indoor temperature Indoor unit operating average detecting Set by indoor unit's remote controller Remote controller's internal sensor...
Page 81 Supplementary information 1) Energy-saving warm airflow control Start timing: Starts when thermostat is switched from ON to OFF after HEAT mode and the hot adjust process have finished. End timing: Ends when any of the following conditions is met: (1) The unit is switched to any mode other than HEAT. (2) The unit enters DEFROST operation.
Page 85 Wireless remote controller pair number: Setting operation 1. Press the SET button (using a pointed implement). Pair No. Check that the remote controller's display has stopped before continuing. MODEL SELECT MODEL SELECT flashes, and the model No. (3 digits) Model No. appears (steadily-lit).
Page 86: Test Run • Replacement Operation
TEST RUN • REPLACEMENT OPERATION & EMERGENCY OPERATION 11-1. Test run • replacement operation 11-1-1. Check points • After installation of indoor and outdoor units, piping work and electric wiring work, re-check that there is no refrigerant leakage, loosened connections and wrong polarity. •...
Page 87 11-2. Before test run 11-3. Test run procedures (1) Indoor unit After installation of indoor and outdoor units, and piping and electric wiring work, re-check that the unit is free Wired type from leaks of refrigerant, loosened connections, and Operating procedures incorrect polarity.
Page 88 Symptoms Cause OUTDOOR BOARD LED Display Remote Controller Display In case of digital display, < > is displayed. After "startup" is displayed, Remote controller is displaying "H0", and • After power is turned ON, system startup lasts for about 2 only green is lit up.
Page 89: Emergency Operation
(2) Outdoor Unit Test run by outdoor unit SW4 The setting of test run (ON/OFF) and its operation mode (cooling/heating) can be set by SW4 on the controller board of out- door unit. 1Set operation mode(cooling or heating) by SW4-2. 2Start test run by setting SW4-1 to ON ( ) with the indicated operation mode of SW4-2.
Page 90 (2) Outdoor unit 1. When the error codes shown below are displayed on outdoor unit or microcomputer for wired remote controller or indoor unit has a failure, but no other problems are found, emergency operation will be available by setting the emergency operation switch (SWE) to ON and short-circuiting the connector (CN31) on outdoor controller board.
Page 91 (3) Operation data during emergency operation During emergency operation, no communication is performed with the indoor unit, so the data items needed for operation are set to the following values: Operation mode Operation data Remarks COOL HEAT Intake temperature (TH1) 20.5: Indoor fluid pipe temperature (TH2) Indoor 2-phase pipe temperature (TH5)
Page 92: Self-Diagnosis
SELF-DIAGNOSIS 12-1. Malfunction-diagnosis method by remote controller 12-1-1. Error history of unit (1) Wired remote controller <In case of trouble during operation> Setting number If there is a trouble on air conditioner, both indoor unit and out- Refrigerant address Mode number Unit number door unit will stop and digital display shows what was wrong.
Page 93 4 To cancel self-diagnosis There are following two methods to cancel self-diagnosis: Press the H “CHECK” button twice within three seconds. Self-diagnosis is cancelled and the display screen will ERROR CODE return to the status before self-diagnosis. Press the I “ON/OFF” button. Self-diagnosis is cancelled and indoor unit will stop.
Page 94 (2) Digital wireless remote controller <In case of trouble during operation> When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop. < Malfunction-diagnosis method at maintenance service> [Procedure] 1.
Page 95 12-1-2. Wired Remote controller Diagnosis If operation can not be carried out from remote controller, try remote controller diagnosis with following process. 1 First, check the electricity current marker. When correct voltage (DC12V) is not supplied to remote controller, the electricity current marker is put out. If the electricity current marker is not lighted, check the remote controller wiring and the indoor units.
Page 96 12-2. Trouble shooting by inferior phenomena Phenomena Factor Countermeasure (1)Remote controller display does not Reference (Meaning of the indoor control board LED) work. (Electric current marker “ ” is not LED1 : Micro computer power supply displayed on the remote controller.) ..Display of DC14V is supply or not from indoor power.
Page 97 Phenomena Factor Countermeasure 1Open the grille to check the filter. (7)Though the remote controller dis- 1Filter clogging (dirt) Clean the filter and remove dust or dirt play is normal in cool mode, the away. capacity is not enough. 2Clean the heat exchanger. 2Heat exchanger clogging (dirt) Lowering the indoor piping temperature and intake pressure means clogging in the...
Page 98 Symptoms: “HO” is kept being displayed on the remote controller. Inspection method and Diagnosis flow Cause troubleshooting Check the display time of “H0” after turning on the main power. 6 minutes 2 minutes How long is “H0” or more or less •...
Page 99 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller 1 LED1 : LED2 : LED3 : Inspection method and Diagnosis flow Cause troubleshooting Check the voltage between S1 and S2 on the terminal block (TB4) of the indoor unit which is used to connect the indoor unit and the outdoor unit.
Page 100 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller 2 LED1 : LED2 : LED3 : Inspection method and Diagnosis flow Cause troubleshooting Check the voltage between S1 and S2 on the terminal block (TB4) of the indoor unit which is used to connect the indoor unit and the outdoor unit.
Page 101 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller 3 LED1 : LED2 : LED3 : — Inspection method and Diagnosis flow Cause troubleshooting Check the voltage of the terminal block (TB6) of the remote controller. DC 10V to DC 16V? •...
Page 102 12-3. Error code list. Error codes are explained on the below tables. w1. When a communication error is occurring, the display of remote controller may not match that of the optional parts “A control service kit (PAC-SK52ST)”, or may not come on at all. w2.
Page 103 3 Remote controller, indoor/outdoor unit transmission error Inspection Error code Unit which method and Error details Display of remote High prior detects error Beep output troubleshooting controller or A remote controller control service tool No beep No display Remote Controller Remote controller transmission error (Signal receiving error) P114 No beep...
Page 104 <Display function of inspection for outdoor unit> The blinking patterns of both LED1(green) and LED2(red) indicate the types of abnormality when it occurs. Types of abnormali- ty can be indicated in details by connecting an optional part ‘A-Control Service Tool (PAC-SK52ST)’ to connector CNM on out- door controller board.
Page 105 Indication Error Outdoor controller board Error Detailed Contents Inspection method reference code LED1 (Green) LED2 (Red) page 1Check if stop valves are open. 3 blinking 1 blinking Abnormality of shell thermostat 2Check if connectors (TH4, LEV-A, and LEV-B) on outdoor controller board are not P111 and discharging temperature (TH4) disconnected.
Page 106 12-4. SELF-DIAGNOSIS ACTION TABLE Error Code Meaning of error code and detection method Judgment and action Case 1 Defective thermistor 1–3 Check resistance value of thermistor. Abnormality of room temperature thermistor (TH1) characteristics. 0: ······15.0k" 1 The unit is in three-minute resume 2 Contact failure of connector 10: ····9.6k"...
Page 107 Error Code Meaning of error code and detection method Judgment and action Case Freezing/overheating protection is (Cooling or drying mode) (Cooling or drying mode) working 1 Clogged filter (reduced airflow) 1 Check clogs of the filter. 1 Freezing protection (Cooling mode) 2 Short cycle of air path 2 Remove shields.
Page 108 Error Code Meaning of error code and detection method Judgment and action Case Abnormality of pipe temperature ther- 1 Defective thermistor 1–3 Check resistance value of thermistor. mistor / Condenser-Evaporator (TH5) characteristics For characteristics, refer to (P1) above. 2 Check contact failure of connector (CN29) 1 The unit is in three-minute resume pro- 2 Contact failure of connector on the indoor controller board.
Page 109 <Abnormalities detected when the power is put on> Error Code Meaning of error code and detection method Judgment and action Case 1 No voltage is supplied to terminal 1 Check following items. block(TB1) of outdoor unit. a) Power supply breaker a) Power supply breaker is put b) Connection of power supply terminal block.
Page 110 Error Code Meaning of error code and detection method Case Judgment and action 1 Contact failure or mis-wiring of 1 Check disconnection or looseness or polarity Indoor/outdoor unit connector indoor/outdoor unit connecting of indoor/outdoor unit connecting wire of mis-wiring, excessive number of units wire indoor and outdoor units.
Page 111 <Abnormalities detected while unit is operating> Error Code Meaning of error code and detection method Judgment and action Case 1 Short cycle of indoor unit 1~6Check indoor unit and repair defectives. Abnormal high pressure (High-pressure switch 63H worked) 2 Clogged filter of indoor unit 3 Decreased airflow caused by Abnormal if high-pressure switch 63H worked (more than 4.41 MPa) during com-...
Page 112 Error Code Meaning of error code and detection method Judgment and action Case Open/short circuit of discharge 1 Disconnection or contact 1 Check connection of connector (TH4) on the temperature thermistor (TH4) failure of connector (TH4) on outdoor controller circuit board. Check breaking of the lead wire for Abnormal if open (3: or less) or short the outdoor controller circuit...
Page 113 Error Code Meaning of error code and detection method Judgment and action Case 1 Decrease of power supply voltage 1 Check the facility of power supply. Abnormality such as overvoltage or 2 Disconnection of compressor 2 Correct the wiring (U•V•W phase) to com- voltage shortage and abnormal synchronous signal to main circuit wiring...
Page 114 Error Code Meaning of error code and detection method Judgment and action Case Remote controller communication error 1 Defective communication cir- 1~3 Diagnose remote controller. (Signal receiving error) cuit of remote controller Take actions as follows according to 2 Defective communication cir- (1) Abnormal if any signal from IC of refrig- diagnosis result.
Page 115 <M-NET communication error> (Note) “Indoor unit” in the text indicates M-NET p.c. board in outdoor unit. Error Code Meaning of error code and detection method Case Judgment and action 1 There are two or more same Address duplicate definition Search the unit with same address as abnor- This error is displayed when transmission address of controller of out- mality occurred.
Page 116 Error Code Meaning of error code and detection method Case Judgment and action NO ACK signal Common factor that has no rela- Always try the followings when the error tion with abnormality source. 1. Transmitting side controller detects “A7” occurs. 1 The unit of former address abnormal if a massage was transmitted does not exist as address...
Page 117 From the previous page. Error Code Meaning of error code and detection method Case Judgment and action 1 During sequential operation of 5. If displayed address or attribute is Same as mentioned in “A7” of the previous FRESH MASTER, indoor unit and FRESH MAS- page.
Page 118: Test Point Diagram
TEST POINT DIAGRAM 13-1. INDOOR UNIT 13-1-1. Indoor power board PLA-RP • AA PKA-RP • GAL PKA-RP • FAL PCA-RP • GA PEA-RP • EA PEAD-RP • EA PEAD-RP • GA CN2S Connect to the indoor controller – board (CN2D) (12~16V DC) CN02 Connect to the indoor...
Page 119 13-1-2. Indoor controller board PLA-RP • AA PKA-RP • GAL PKA-RP • FAL PCA-RP • GA PEAD-RP • EA CN22 CN90 CN2D Connect to the terminal block(TB5) PEAD-RP • GA CN32 Connect to the wireless Connect to the indoor (Remote controller connecting wire) Connector CN6V remote controller board...
Page 120 13-1-3. Indoor controller board PEA-RP • EA CN22 CN2D CN90 Connect to the terminal block (TB5) CN32 Connect to the indoor Connect to the wireless (Remote controller connecting wire) Connector power board (CN2S) remote controller board (10~16V DC) (Remote switch) (12~16V DC) –...
Page 121 FAN12 FAN22 13-2. OUTDOOR UNIT • (FAN22 is only for RP4-6VHA.) 13-2-1. Outdoor controller circuit board Connect to fan motor (MF) PUHZ-RP1.6VHA PUHZ-RP2VHA PUHZ-RP2.5VHA (Detection of position) PUHZ-RP3VHA PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA 1 to 5 5V DC pulse PUHZ-RP3VHA-A PUHZ-RP4VHA-A PUHZ-RP5VHA-A PUHZ-RP6VHA-A 2 to 5 (Detected while the PUHZ-RP4VHA...
Page 122 13-2.2. Outdoor noise filter circuit board PUHZ-RP1.6VHA PUHZ-RP2VHA LI, NI Voltage of 220-240V AC is input. Connect to the earth (Connect to the terminal block(TB1)) CNAC1, CNAC2 220-240V AC (Connect to the Primary current outdoor controller (Connect to the circuit board outdoor power (CNAC)) circuit board...
Page 123 13-2-3. Outdoor noise filter circuit board PUHZ-RP2.5VHA PUHZ-RP3VHA PUHZ-RP3VHA-A LI, NI Voltage of 220-240V AC is input. Connect to the earth (Connect to the terminal block(TB1)) CNAC1, CNAC2 220-240V AC (Connect to the outdoor controller circuit board (CNAC)) Primary current (Connect to the outdoor power circuit board...
Page 124 13-2-4. Outdoor noise filter circuit circuit board PUHZ-RP4VHA PUHZ-RP4VHA-A PUHZ-RP5VHA PUHZ-RP5VHA-A PUHZ-RP6VHA PUHZ-RP6VHA-A LO, NO PUHZ-RP4VHA PUHZ-RP4VHA Voltage of 220-240V AC is output PUHZ-RP5VHA PUHZ-RP5VHA (Connect to the outdoor power PUHZ-RP6VHA PUHZ-RP6VHA circuit board (SC-R, SC-S)) CNAC1, CNAC2 220-240V AC (Connect to the outdoor controller circuit board...
Page 125 13-2-5. Outdoor Power circuit board Brief Check of DIP-IPM and DIP-PFC PUHZ-RP1.6VHA W Usually, they are in a state of being short-circuited if they are broken. PUHZ-RP2VHA Measure the resistance in the following points (connectors, etc.). If they PUHZ-RP2.5VHA are short-circuited, it means that they are broken. 1.
Page 126 Brief Check of POWER MODULE 13-2-6. Outdoor Power circuit board W Usually, they are in a state of being short-circuited if they are broken. PUHZ-RP4VHA PUHZ-RP4VHA-A Measure the resistance in the following points (connectors, etc.). If they are short-circuited, it means that they are broken. PUHZ-RP5VHA PUHZ-RP5VHA-A 1.
Page 127: Troubleshooting
TROUBLESHOOTING • Before repair Frequent calling from customers. Phone Calls From Customers How to Respond Note 1 The operating display of remote 1 Check if power is supplied to air conditioner. Unit does not operate controller does not come on. Nothing appears on the display unless power is at all.
Page 128 Phone Calls From Customers How to Respondm Note 1 Check the set temperature of remote controller. The room cannot be cooled or heated sufficiently. The outdoor unit cannot be operated if the set temperature is not appropriate. The outdoor unit operates in the following modes. COOL: When the set temperature is lower than the room temperature.
Page 129 Phone Calls From Customers How to Respond Note 3 Air blows out for a while after Something 3 This is not a malfunction. However, this control is also is wrong HEAT operation is stopped. The blower is operating just for cooling down the applied to the models which with the heated-up air conditioner.
Page 130 Phone Calls From Customers How to Respond Note A white mist is expelled from the indoor unit. This is not a malfunction. This may occur when the operation gets started in the room of high humidity. Water or moisture is expelled from the outdoor Cooling;...
Page 131: System Control
SYSTEM CONTROL 15-1. VARIETY OF SYSTEM CONTROL FUNCTIONS Parts To Be Procured System Name System Diagram Features (Sold separately or obtained locally.) A. Remote controller • There are two types of remote controllers: wired type and operation wireless type. (Standard type) •...
Page 132 Parts To Be Procured System Name System Diagram Features (Sold separately or obtained locally.) J. Air conditioners • Connect the indoor unit with a Mitsubishi Lossnay ventilator • Wired remote Indoor operating control and the function selection of the remote controller can be controller unit Lossnay...
Page 133 15-2. One Remote Controller (Standard) Operation (1) One Wired Remote Controller (OC: Outdoor unit IC: Indoor unit R: Remote controller (for wireless type: optical receiver adapter) Slim Air Conditioners System Standard 1:1 Simultaneous Twin Simultaneous Triple Simultaneous Quadro Outdoor unit Remote controller connection circuit Indoor/Outdoor...
Page 134 15-3. Two remote controller control operation (1) Two Wired Remote Controllers (OC: Outdoor unit IC: Indoor unit R-1 Master remote controller R-2 Slave remote controller) Slim Air Conditioners System Standard 1:1 Simultaneous Twin Simultaneous Triple Simultaneous Quadro Outdoor unit Remote controller connection circuit (Controller cable) Indoor unit...
Page 135 (3) One each of wired and wireless remote controllers (OC: Outdoor unit IC: Indoor unit R: Master remote controller R’: Wireless remote controller optical receiver section) Slim Air Conditioners System Standard 1:1 Simultaneous Twin Simultaneous Triple Simultaneous Quadro Remote Outdoor unit OC controller optical receiver...
Page 136 15-5. Power Outage Automatic Recovery Operation • Whenever a power outage or switching of the power supply causes the power supply of an operating air conditioner to go from OFF to ON, this function will automatically restore the operation of the air conditioner to its previous operating mode. w If the power is turned from OFF to ON when the air conditioner is not in operation, the air conditioner will not automatically be turned on.
Page 137 (2). Basic wiring diagram (3). Part specifications No.1 unit No.2 unit Remote/Hand-held 1 Remote/Hand-held 2 Adapter for 3 Relay box relay box relay box selection switch selection switch remote start/stop Control circuit T Timer (Example) Model power supply next Single polarity PAC-SE55RA-E (On delay system) unit...
Page 138 15-8. Obtaining remote display Use the A control operating display kit (PAC-SF40RM-E) to provide operation/error non-voltage contact output and on/off input function. (1). Wiring method External input External input No voltage (Momentary "a" contact) Wireless CN90 Error output Error (No voltage momentary "a" contact) Operating output Operation (No voltage momentary "a"...
Page 139 (2). Basic pattern for timer control Use a no-voltage contact point output timer (one that has separate circuits for the load side and timer power supply). a) Timer-independent control b) Combined control by timer and remote controller SW ON Timer control As selected by remote controller operation switch.
Page 140 HEAD OFFICE: MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI CHIYODA-KU TOKYO100-8310, JAPAN cCopyright 2003 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Sep. 2004. No. OCT04 REVISED EDITION-A PDF 9 Distributed in Dec. 2003. No. OCT04 PDF 9 New publication, effective Sep. 2004...

Mitsubishi Electric PKA-RP1.6GAL Service Technical Manual

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