Mitsubishi Electric MSZ-D30NA Service Manual
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Mitsubishi Electric MSZ-D30NA Service Manual

Indoor unit
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INDOOR UNIT

SERVICE MANUAL
Models
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
Revision C:
MSZ-D30NA-
MSZ-D36NA-
MSY-D30NA-
MSY-D36NA-
CONTENTS
1. TECHNICAL CHANGES
2. PART NAMES AND FUNCTIONS ····················· 4
3. SPECIFICATION ················································ 5
4. OUTLINES AND DIMENSIONS ························ 7
5. WIRING DIAGRAM ············································ 8
6. REFRIGERANT SYSTEM DIAGRAM ··············· 9
7. SERVICE FUNCTIONS ··································· 10
8. MICROPROCESSOR CONTROL ··················· 12
9. TROUBLESHOOTING ····································· 19
10. DISASSEMBLY INSTRUCTIONS ···················· 32
PARTS CATALOG (OBB501)
• MSZ-D30/D36NA-
and
8
MSY-D30/D36NA-
have been added.
8
Please void OBH501 REVISED EDITION-B.
No. OBH501
REVISED EDITION-C
8
8
DAC-1
8
8
Outdoor unit service manual
MUZ-D•NA Series (OBH502)
MUY-D•NA Series (OBH502)
·······································
3

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Summary of Contents for Mitsubishi Electric MSZ-D30NA

  • Page 1: Indoor Unit

    Revision C: • MSZ-D30/D36NA- MSY-D30/D36NA- have been added. Please void OBH501 REVISED EDITION-B. INDOOR UNIT No. OBH501 SERVICE MANUAL REVISED EDITION-C Models MSZ-D30NA MSZ-D30NA- MSZ-D36NA MSZ-D36NA- DAC-1 MSY-D30NA MSY-D30NA- MSY-D36NA MSY-D36NA- Outdoor unit service manual MUZ-D•NA Series (OBH502) MUY-D•NA Series (OBH502) CONTENTS 1.
  • Page 2 Use the specifi ed refrigerant only Never use any refrigerant other than that specified. Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions.
  • Page 3 TECHNICAL CHANGES MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NA 1. New model MSZ-D30NA MSZ-D36NA - 1. Electronic control P.C. board has been changed. MSZ-D36NA MSZ-D36NA - 1. Electronic control P.C. board has been changed. MSY-D30NA MSY-D30NA - 1. Electronic control P.C. board has been changed.
  • Page 4 PART NAMES AND FUNCTIONS MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NA Air cleaning filter (Anti-Allergy Enzyme Filter) Front panel Air filter (Catechin air filter) Air inlet Emergency operation switch Air outlet Operation indicator Horizontal vane lamp Remote control Remote controller receiving section ACCESSORIES...
  • Page 5 SPECIFICATION Model MSZ-D30NA MSY-D30NA MSZ-D36NA MSY-D36NA Power supply V, phase, Hz 208/230 , 1 , 60 Max. fuse size (time delay)/ Disconnect switch Min. circuit ampacity Fan motor F.L.A 0.76 COOL Dry 389 - 639 - 848 - 887 Airfl ow...

  • Page 6: Power Supply

    Model Mode Function (CFM) (ft./sec.) range (ft.) to the position where the air speed is 1 ft./sec., when air is blown out horizon- MSZ-D30NA HEAT 23.6 45.0 tally from the unit properly at the High MSZ-D36NA speed position. MSZ-D30NA 23.6 45.0...
  • Page 7 OUTLINES AND DIMENSIONS MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NA Unit : inch Indoor unit 2-11/16 4-11/16 45-1/2 2-3/16 20-7/8 17-11/16 5-3/8 11-5/8 Wall hole ø3 Air in 46-1/16 Installation plate Piping Drain hose 2-15/16 33-11/16 9-1/2 2-5/8 Air out 5-7/8 Piping Insulation 2-5/16 ø3/8 19-11/16...
  • Page 8 WIRING DIAGRAM MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NA MSZ-D30NA- MSZ-D36NA- MSY-D30NA- MSY-D36NA-...
  • Page 9 REFRIGERANT SYSTEM DIAGRAM MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NA Unit : inch Refrigerant pipe ø5/8 (with heat insulator) Indoor coil Indoor thermistor heat exchanger RT12 (Main) Flared connection Indoor coil Distributor Joint thermistor Joint connection RT13 (Sub) Room temperature thermistor RT11 Flared connection...
  • Page 10 SERVICE FUNCTIONS MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NA 7-1. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS the indoor electronic control P.C. board. The time will be shortened as follows. (Refer to 9-7.)
  • Page 11 7-3. AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed are memorized by the indoor electronic control P.C. board. “AUTO RESTART FUNCTION” automatically starts operation in the same mode just before the shut-off of the main power. Operation If the main power has been cut, the operation settings remain.
  • Page 12 MICROPROCESSOR CONTROL MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NA WIRELESS REMOTE CONTROLLER These pictures show MSZ type. Signal transmitting section Operation display section OPERATE/STOP (ON/OFF) button VANE CONTROL button FAN SPEED (Horizontal vane button) CONTROL button Temperature buttons OFF TIMER button OPERATION SELECT button...
  • Page 13 8-1. COOL ( ) OPERATION (1) Press OPERATE/STOP (ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select COOL mode with OPERATION SELECT button. (3) Press TEMPERATURE buttons (TOO WARM or TOO COOL button) to select the desired temperature. The setting range is 61 ~ 88°F (16 ~ 31°C).
  • Page 14 (4) The initial set temperature is decided by the initial room temperature. Model Initial room temperature Initial set temperature 79°F (26°C) or more 75°F (24°C) COOL mode of "I FEEL CONTROL" 77°F (25°C) to 79°F (26°C) Initial room temperature minus 4°F (2°C) DRY mode of "I FEEL More than 55°F (13°C), Initial room temperature minus 4°F (2°C)
  • Page 15 8-7. AUTO VANE OPERATION 1. Horizontal vane (1) Vane motor drive These models are equipped with a stepping motor for the horizontal vane. The rotating direction, speed, and angle of the motor are controlled by pulse signals (approximately 12 V) transmitted from indoor microprocessor. (2) The horizontal vane angle and mode change as follows by pressing VANE CONTROL button.
  • Page 16 2. Vertical vane (1) Vane motor drive These models are equipped with a stepping motor for the vertical vane. The rotating direction, speed, and angle of the motor are controlled by pulse signals (approximately 12 V) transmitted from microprocessor. (2) The vertical vane angle and mode change as follows by pressing WIDE VANE button. SWING (3) Positioning To confirm the standard position, the vane moves until it touches the vane stopper.
  • Page 17 8-8. TIMER OPERATION 1. How to set the time (1) Check that the current time is set correctly. NOTE : Timer operation will not work without setting the current time. Initially “0:00” blinks at the current time display of TIME MONITOR, so set the current time correctly with CLOCK SET button. How to set the current time (a) Press the CLOCK set button.
  • Page 18 8-9. EMERGENCY/TEST OPERATION In case of test run operation or emergency operation, use EMERGENCY OPERATION switch on the front of the indoor unit. Emergency operation is available when the remote controller is missing, has failed or the batteries of the remote controller run down.
  • Page 19 TROUBLESHOOTING MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NA 9-1. CAUTIONS ON TROUBLESHOOTING 1. Before troubleshooting, check the following 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for miswiring. 2. Take care of the following during servicing 1) Before servicing the air conditioner, be sure to turn off the unit first with the remote controller, and then after confirm- ing the horizontal vane is closed, turn off the breaker and/or disconnect the power plug.
  • Page 20 9-2. FAILURE MODE RECALL FUNCTION Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (9-4.) disappears, the memorized failure details can be recalled. This mode is very useful when the unit needs to be repaired for the abnormality which does not recur.
  • Page 21 2. Indoor unit failure mode table Left lamp of OP- Abnormal point ERATION INDICA- Condition Remedy (Failure mode) TOR lamp Not lighted Normal — — The room temperature thermistor short or open 1-time fl ash every Room temperature Refer to the characteristics of the room temperature circuit is detected every 8 seconds during op- 0.5-second thermistor...
  • Page 22 9-3. INSTRUCTION OF TROUBLESHOOTING Start Indoor unit operates. Indoor unit oper- Indoor unit does OPERATION INDICATOR Outdoor unit does not receive the ates. lamp on the indoor unit is not operate normally. signal from re- Outdoor unit fl ashing on and off. does not operate.

  • Page 23: Outdoor Unit Mca

    9-4. TROUBLESHOOTING CHECK TABLE Before taking measures, make sure that the symptom reappears for accurate troubleshooting. When the indoor unit has started operation and detected an abnormality of the following condition (the first detection after the power ON), the indoor fan motor turns OFF and OPERATION INDICATOR lamp flashes. Lighted OPERATION INDICATOR Blinking...
  • Page 24 9-5. TROUBLE CRITERION OF MAIN PARTS MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NA Part name Check method and criterion Figure Room temperature therm- Measure the resistance with a tester. istor (RT11) Indoor coil thermistor Refer to 9-7. "Test point diagram and voltage", "Indoor electronic control P.C.
  • Page 25 9-6. TROUBLESHOOTING FLOW A Check of indoor fan motor The indoor fan motor error has occurred, and the indoor fan does not operate. Turn OFF the power supply. Pay enough attention to the high voltage on the fan motor connector CN211. Turn ON the power supply, wait 5 seconds or more, and then press EMERGENCY OPERATION switch.
  • Page 26 B Check of remote controller and receiver P.C. board Check if the remote controller is exclusive for this air conditioner. Switch ON the remote controller. Is LCD display on the remote controller Replace the batteries. (Refer to 9-1.4.) visible? (Not clear) Remove the batteries, then set them back and press RESET button.
  • Page 27 C Check of indoor electronic control P.C. board and indoor fan motor Turn OFF the power supply. Remove indoor fan motor connector CN211 Measure the resistance between Short circuit: CN211 of the indoor fan motor and vane motor connector CN151 from the Replace the indoor fan motor.
  • Page 28 D How to check miswiring and serial signal error Turn OFF the power supply. Is there rated voltage AC in Check the power supply. the power supply? Turn ON the power supply. Is there rated voltage between outdoor terminal block S1 and Check the wiring.
  • Page 29 E Electromagnetic noise enters into TV sets or radios Is the unit grounded? Ground the unit. Is the distance between the antennas Extend the distance between the antennas and and the indoor unit within 9.91 ft., or is the indoor unit, and/or the antennas and the the distance between the antennas and outdoor unit.
  • Page 30 9-7. TEST POINT DIAGRAM AND VOLTAGE MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NA Indoor electronic control P.C. board Power supply input Cement Varistor (NR11) 230 V AC resistor Release of Auto restart (R111) Fuse (F11) function T3.15AL250V Solder the Jumper wire to JR07 (Refer to 7-3.)
  • Page 31 MSZ-D30NA- MSZ-D36NA- MSY-D30NA- MSY-D36NA- Indoor electronic control P.C. board Power supply input Cement Varistor (NR11) 230 V AC resistor Release of Auto restart (R111) Fuse (F11) function T3.15AL250V Solder the Jumper wire to JR07 (Refer to 7-3.) Indoor fan motor...
  • Page 32 Pull the terminal while pull out the terminal pushing the locking slowly. Locking lever lever. Connector 10-1. MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NA NOTE : Turn OFF power supply before disassembly. OPERATING PROCEDURE PHOTOS 1. Removing the panel Photo 1 Front panel...
  • Page 33 OPERATING PROCEDURE PHOTOS Photo 3 3. Removing the nozzle assembly (1) Remove the panel and the corner box. (Refer to 1.) (2) Remove the electrical cover. (Refer to 2.) (3) Remove the electrical side cover, disconnect the vane Screw of electrical motor connector.
  • Page 34 Screw of the line flow fan HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Copyright 2008 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Apr. 2011. No. OBH501 REVISED EDITION-C Distributed in Jun. 2008. No. OBH501 REVISED EDITION-B 6 Distributed in Mar. 2008. No. OBH501 REVISED EDITION-A 7 New publication, effective Apr.

  • Page 35: Table Of Contents

    Revision C: • Errors in TROUBLESHOOTING have been corrected. SPLIT-TYPE AIR CONDITIONERS Please void OBH502 REVISED EDITION-B. OUTDOOR UNIT No. OBH502 SERVICE MANUAL REVISED EDITION-C utilized R410A Models MUZ-D30NA / - MUZ-D36NA / - DAC-1 MUY-D30NA / - MUY-D36NA / - Indoor unit service manual MSZ-D•NA Series (OBH501) MSY-D•NA Series (OBH501)
  • Page 36 Use the specifi ed refrigerant only Never use any refrigerant other than that specified. Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions.

  • Page 37: Technical Changes

    TECHNICAL CHANGES MUZ-D30NA MUZ-D30NA- MUZ-D36NA MUZ-D36NA- MUY-D30NA MUY-D36NA 1. New model MUZ-D30NA → MUZ-D30NA- MUZ-D30NA- → MUZ-D30NA- MUZ-D36NA → MUZ-D36NA- MUZ-D36NA- → MUZ-D36NA- MUY-D30NA → MUY-D30NA- MUY-D36NA → MUY-D36NA- 1. Wiring diagram has been changed. 2. Fan motor has been changed. PART NAMES AND FUNCTIONS MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA Air inlet...

  • Page 38: Specification

    SPECIFICATION Item Model MSZ-D30NA MSY-D30NA MSZ-D36NA MSY-D36NA 32,000/33,200 33,200/34,600 30,700 30,700 Cooling 1 (9,800 ~ 32,000) / (9,800 ~ 33,200) / Capacity (9,800 ~ 30,700) (9,800 ~ 30,700) (9,800 ~ 33,200) (9,800 ~ 34,600) Btu/h Rated (Minimum ~ Maximum) 32,600...
  • Page 39 Test condition 3, 4 Indoor air condition (°F) Outdoor air condition (°F) Mode Test Dry bulb Wet bulb Dry bulb Wet bulb "A" Cooling Steady State (75) at rated compressor Speed "B-2" Cooling Steady State (65) at rated compressor Speed SEER "B-1"...

  • Page 40: Outlines And Dimensions

    OUTLINES AND DIMENSIONS MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA Unit: inch Open as a rule REQUIRED SPACE 20 inch or more if the front and both sides are open 4 inch or more / 8 inch or more if there are obstacles to both sides Open as a rule 20 inch or more if the back,...

  • Page 41: Wiring Diagram

    WIRING DIAGRAM MUZ-D30NA MUZ-D30NA- MUZ-D36NA MUZ-D36NA-...

  • Page 42: Msz-D30Na

    MUZ-D30NA- MUZ-D30NA- MUZ-D36NA- MUZ-D36NA-...
  • Page 43 MUY-D30NA MUY-D36NA...
  • Page 44 MUY-D30NA- MUY-D36NA-...

  • Page 45: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM MUZ-D30NA MUZ-D36NA Unit: inch Strainer Capillary tube separator #100 O.D. 0.071 x I.D. 0.024 x 39-3/8 Refrigerant pipe ( 1.8 x 0.6 x 1,000) 4-way valve (with heat insulator) Service Stop valve port (with service port) Outdoor Defrost Flared connection heat...
  • Page 46 MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE Refrigerant piping: ft. Piping size O.D: in. Model Max. Length Max. Height difference Liquid MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA Indoor unit Max. Height difference Max. Length Outdoor unit ADDITIONAL REFRIGERANT CHARGE (R410A: oz.) Refrigerant piping exceeding 25 ft.

  • Page 47: Data

    DATA MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA 7-1. PERFORMANCE DATA 1) COOLING CAPACITY Indoor air Outdoor intake air DB temperature (˚F) Model IWB (˚F) 37.6 19.1 3.43 35.2 17.8 3.75 33.0 16.7 4.04 30.7 15.6 4.25 28.2 14.3 4.43 MUZ-D30NA 35.6 22.8 3.23 33.2 21.2...

  • Page 48: Performance Curve

    7-2. PERFORMANCE CURVE Cooling MUZ-D36NA MUY-D30NA MUZ-D30NA SHF at rating condition = 0.64 SHF at rating condition = 0.62 SHF at rating condition = 0.64 Airflow = 763 CFM Airflow = 763 CFM Airflow = 763 CFM Outdoor intake air DB temperature (°F) Outdoor intake air DB temperature (°F) Outdoor intake air DB temperature (°F) MUY-D36NA...
  • Page 49 7-3. CONDENSING PRESSURE Cooling Data is based on the condition of indoor humidity 50%. Air flow should be set to High speed. MUZ-D30NA (PSIG) (PSIG) 68 70 105(°F) 68 70 105(°F) Outdoor ambient temperature Outdoor ambient temperature MUZ-D36NA (PSIG) (PSIG) 68 70 105(°F) 68 70...
  • Page 50 MUY-D36NA (PSIG) (PSIG) 68 70 105(°F) 68 70 105(°F) Outdoor ambient temperature Outdoor ambient temperature Heating Data is based on the condition of outdoor humidity 75%. Air flow should be set to High speed. Data is for heating operation without any frost. MUZ-D30NA (PSIG) (PSIG)

  • Page 51: Msy-D36Na

    7-4. STANDARD OPERATION DATA Model MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NA Item Unit Cooling Heating Cooling Heating Cooling Cooling Capacity Btu/h 30,700 32,600 32,000/33,200 35,200 30,700 33,200/34,000 — 0.64 — 0.62 — 0.64 0.62 Input 3.85 3.36 4.14/4.36 3.84 3.38 4.21/4.24 Rated frequency...
  • Page 52 7-5. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY MUZ-D30NA Correction of Cooling capacity Correction of Cooling total input Correction of Heating total input Correction of Heating capacity (Hz) (Hz) (Hz) (Hz) The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor MUZ-D36NA...
  • Page 53 7-6. TEST RUN OPERATION (How to operate fixed-frequency operation) 1. Press EMERGENCY OPERATION switch to COOL or HEAT mode (COOL: Press once, HEAT: Press twice). 2. Test run operation starts and continues to operate for 30 minutes. 3. Compressor operates at rated frequency in COOL mode or 58 Hz in HEAT mode. 4.

  • Page 54: Actuator Control

    ACTUATOR CONTROL MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA 8-1. OUTDOOR FAN MOTOR CONTROL The fan motor turns ON/OFF, interlocking with the compressor. [ON] The fan motor turns ON 5 seconds before the compressor starts up. [OFF] The fan motor turns OFF 15 seconds after the compressor has stopped running. 5 seconds 15 seconds Compressor...

  • Page 55: Service Functions

    SERVICE FUNCTIONS MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA 9-1. PRE-HEAT CONTROL If moisture gets into the refrigerant cycle, or when refrigerant is liquefi ed and col- lected in the compressor, it may interfere the start-up of the compressor. To improve start-up condition, the compressor is energized even while it is not operating.

  • Page 56: Troubleshooting

    TROUBLESHOOTING MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA 10-1. CAUTIONS ON TROUBLESHOOTING 1. Before troubleshooting, check the following 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for miswiring. 2. Take care of the following during servicing 1) Before servicing the air conditioner, be sure to turn OFF the main unit first with the remote controller, and after con- firming the horizontal vane is closed, turn off the breaker and/or disconnect the power plug.
  • Page 57 10-2. FAILURE MODE RECALL FUNCTION Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (10-3.) disappears, the memorized failure details can be recalled. This mode is very useful when the unit needs to be repaired for the abnormality which does not recur.
  • Page 58 2. Flow chart of the detailed outdoor unit failure mode recall function Operational procedure The outdoor unit might be abnormal. Confi rm if outdoor unit is abnormal according to the following procedures. Confi rm that the remote controller is in the failure mode recall function. With the remote controller headed towards the indoor unit, press TOO 1.
  • Page 59 3. Outdoor unit failure mode table MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA LED indication (Outdoor P.C. The left lamp of OPERA- Indoor/outdoor Abnormal point board) TION INDICATOR lamp Condition Remedy unit failure mode (Failure mode / protection) (Indoor unit) recall function LED 1 LED 2 Non (Normal) Lighting...
  • Page 60 LED indication (Out- The left lamp of OPERA- Indoor/outdoor door P.C. board) Abnormal point TION INDICATOR lamp Condition Remedy unit failure mode (Failure mode / protection) (Indoor unit) recall function LED 1 LED 2 • Check the voltage of Goes out A failure is detected in the operation of the converter dur- Converter 5 times ing operation.
  • Page 61 10-3. TROUBLESHOOTING CHECK TABLE MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA Indication Symptom Abnormal point / Condition Condition Remedy LED1 LED2 (Red) (Yellow) • Check the connection of the compressor connect- IPM protection stop or lock protection stop is continuously ing wire. performed three times within 1 minute after the compressor •...
  • Page 62 Indication Symptom Abnormal point / Condition Condition Remedy LED1 LED2 (Red) (Yellow) Primary current protection The input current exceeds 15 A. • These symptoms do not mean any abnormality of Once Lighting Secondary current protection The current of the compressor exceeds 15 A. the product, but check the following points.
  • Page 63 10-4. TROUBLE CRITERION OF MAIN PARTS MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA Part name Check method and criterion Figure Defrost thermistor (RT61) (MUZ) Ambient temperature thermistor (RT65) Measure the resistance with a tester. Outdoor heat ex- Refer to 10-6. “Test point diagram and voltage”, 1. “Outdoor electron- changer temperature ic control P.C.
  • Page 64 10-5. TROUBLESHOOTING FLOW A How to check inverter/compressor Disconnect the terminal of the compressor. 3 minutes after turn- ing on the power supply, start EMERGENCY OPERATION. •After the outdoor fan starts running, wait for 1 minute or more before measur- ing the voltage.
  • Page 65 B Check of outdoor thermistors Disconnect the connector of thermistor in the outdoor P.C. board (see below table), and measure the resistance of thermistor. Replace the thermistor except RT64. Is the thermistor normal? (Refer to 10-6.1.) When RT64 is abnormal, replace the outdoor power board.
  • Page 66 C Check of R.V. coil MUZ-D30/36 • Heating operation does not work. Disconnect the lead wire leading to the compressor. 3 minutes after turning on the power supply, start EMERGENCY OPERATION in HEAT mode. Is there voltage of 208/230 VAC between pin1 Turn off power supply of indoor and outdoor unit, and discon- and pin 2 at connector CN912? nect the connector CN781 in the outdoor electronic control P.C.
  • Page 67 D Check of outdoor fan motor Check the connection between the connector CN931 and CN932. Is the resistance between each ter- minal of outdoor fan motor normal? (Refer to 10-4.) Disconnect CN932 from outdoor electronic control P.C. board, and turn on the power supply. Rotate the outdoor fan motor manually and measure the voltage of CN931.
  • Page 68 F Check of compressor start failure Confi rm that 1~4 is normal. •Electrical circuit check Contact of lead wire leading to compressor Output voltage of the outdoor electronic control P.C. board and balance of them (See 10-5. ) Direct current voltage to the outdoor electronic control P.C. board Voltage between outdoor terminal block S1-S2 Does the compressor run for 10 seconds or Check the refrigerant circuit.
  • Page 69 H How to check miswiring and serial signal error Turn OFF the power supply. Is there rated voltage in the Check the power supply. power supply? Turn ON the power supply. Is there rated voltage between outdoor terminal block S1 and Check the wiring.
  • Page 70 I Check of HPS 1. Disconnect the connector CN681 in the electronic control P.C. board. 2. Check the resistance of HPS 1 minute after the outdoor unit power supply was turned OFF. Check the resistance between each terminal. Replace HPS. Infi...
  • Page 71 K Electromagnetic noise enters into TV sets or radios Is the unit grounded? Ground the unit. Is the distance between the antennas Extend the distance between the antennas and and the indoor unit within 9.91 ft., or is the indoor unit, and/or the antennas and the the distance between the antennas and outdoor unit.
  • Page 72 10-6. TEST POINT DIAGRAM AND VOLTAGE 1. Outdoor electronic control P.C. board MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA Defrost thermistor (RT61) Ambient temperature thermistor (RT65) Outdoor heat exchanger temperature thermistor (RT68) Fin temperature thermistor (RT64) Discharge temperature thermistor (RT62) 32 50 68 86 104 122 140 158 176 104 122 140 176 194 122 212 230 248 Temperature (°F) Temperature (°F)
  • Page 73 2. Noise filter P.C. board MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA CN901 CN902 CN903 To electronic 208/230 VAC To power To power control P.C. 60 Hz board board board Input CN912 R.V. coil 208/230 VAC 60 Hz Output 208/230 VAC 60 Hz Output CN61 F64 FUSE...
  • Page 74 3. Outdoor power board MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA Connect to the compressor Voltage among phases: 180 V Connect to the ground 294-370 VDC Output (Red) Connect to the controller board (+)1-5(–): Signal transmission (To electronic control P.C. board) 5 VDC pulse wave (–) (+)2-5(–): Zero cross signal (White)

  • Page 75: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS <"Terminal with locking mechanism" Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are two types (refer to (1) and (2)) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching.
  • Page 76 OPERATING PROCEDURE PHOTOS 2. Removing the inverter assembly, P.C. board and Photo 4 power board (1) Remove the top panel, cabinet, service panel and the back panel. (Refer to 1.) Screws of the reactor (2) Disconnect the following connectors: <Electronic control P.C. board> CN931 and CN932 (Fan motor) CN795 (LEV) CN661 (Discharge temperature thermistor, defrost therm-...
  • Page 77 OPERATING PROCEDURE PHOTOS 4. Removing the defrost thermistor (MUZ), discharge Photo 7 temperature thermistor, outdoor heat exchanger Outdoor heat temperature thermistor and ambient temperature exchanger temperature thermistor thermistor (1) Remove the top panel, cabinet, service panel and the back panel. (Refer to 1.) (2) Disconnect the following connectors: <Electronic control P.C.
  • Page 78 (3) Remove the screws of the reactor, and remove the reactor. HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2008 MITSUBISHI ELECTRIC CO.,LTD Distributed in Jul. 2011. No. OBH502 REVISED EDITION-C Distributed in Jan. 2009. No. OBH502 REVISED EDITION-B 5 Distributed in Mar.
  • Page 79 Revision D: • MSZ-GE06/09/12/15/18NA- and MSY- GE09/12/15/18NA- have been added. SPLIT-TYPE AIR CONDITIONERS Please void OBH548 REVISED EDITION-C INDOOR UNIT No. OBH548 SERVICE MANUAL REVISED EDITION-D Models MSZ-GE06NA MSZ-GE06NA- MSZ-GE09NA MSZ-GE09NA- MSZ-GE12NA MSZ-GE12NA- MSZ-GE15NA MSZ-GE15NA- DAC-8-9 MSZ-GE18NA MSZ-GE18NA- MSZ-GE24NA DAC-2-7 MSY-GE09NA MSY-GE09NA- MSY-GE12NA...

  • Page 80: Msz-Ge09Na

    Use the specifi ed refrigerant only Never use any refrigerant other than that specified. Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions.

  • Page 81: Part Names And Functions

    PART NAMES AND FUNCTIONS MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA Air lter [Catechin air lter (GE NA) ] [Nano platinum lter (GE NA- Front panel Air cleaning lter (Anti-Allergy Enzyme Filter) Air inlet Heat exchanger Remote controller Air outlet Horizontal vane Display section...
  • Page 82 MSZ-GE24NA MSY-GE24NA Front panel Air fi lter (Nano platinum filter) Air cleaning filter (Electrostatic anti-allergy enzyme filter) Air inlet Air outlet Remote controller Heat exchanger Horizontal vane Display section ACCESSORIES Installation plate Installation plate fi xing screw 4 × 25 mm Remote controller holder Fixing screw for 3.5 ×...

  • Page 83: Specification

    SPECIFICATION MSZ-GE09NA MSZ-GE12NA Indoor model MSZ-GE06NA MSY-GE09NA MSY-GE12NA Power supply V, phase, Hz 208/230, 1, 60 Max. fuse size (time delay)/ Disconnect switch A Min. circuit ampacity Fan motor F.L.A 0.76 COOL Dry 399-321-237-170-145 Airfl ow (Wet) CFM (364-286-201-134-109) Super High - High - Med. - Low - Quiet HEAT Dry CFM 406-321-233-170-145...
  • Page 84 3-1. OPERATING RANGE (1) POWER SUPPLY Rated voltage Guaranteed voltage (V) 208/230 V Min. 187 Max. 253 Indoor unit 1 phase 60 Hz (2) OPERATION Intake air temperature (°F) Mode Condition Indoor Outdoor Standard temperature — Maximum temperature — Cooling Minimum temperature —...

  • Page 85: Outlines And Dimensions

    OUTLINES AND DIMENSIONS MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA Unit: inch MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA MSZ-GE06NA- MSZ-GE09NA- MSZ-GE12NA- MSZ-GE15NA- MSZ-GE18NA- MSY-GE09NA- MSY-GE12NA- MSY-GE15NA- MSY-GE18NA- 7/16×13/16 Oblong hole 7/16×1 Oblong hole 8-7/8 8-7/8 3-1/8 3-1/8 Installation plate 31-7/16 30-15/16 6-1/8 6-1/8 2-3/8 13-5/16 13-9/16 2-1/8...
  • Page 86 MSZ-GE24NA MSY-GE24NA 7/16×1 Oblong hole 7/16×3/4 Oblong hole Installation plate 5-1/16 8-7/8 8-7/8 43-5/16 4-5/16 42-7/8 3/16 7-27/32 7-27/32 Indoor unit 4-3/8 1-15/16 19-3/4 17-5/16 9-3/8 Air in Installation plate Wall hole Ø3 3/16 Piping 2-1/2 2-9/16 33-1/8 7-1/8 ( 70° ) 4-7/8 Drain hose 6-5/16...

  • Page 87: Wiring Diagram

    WIRING DIAGRAM MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA MSZ-GE06NA- MSZ-GE09NA- MSZ-GE12NA- MSZ-GE15NA- MSZ-GE18NA- MSY-GE09NA- MSY-GE12NA- MSY-GE15NA- MSY-GE18NA- OBH548D...
  • Page 88 MSZ-GE06NA- MSZ-GE09NA- MSZ-GE12NA- MSZ-GE15NA- MSZ-GE18NA- MSY-GE09NA- MSY-GE12NA- MSY-GE15NA- MSY-GE18NA- MSZ-GE24NA MSY-GE24NA OBH548D...

  • Page 89: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA Unit: inch MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA Refrigerant pipe ø3/8 (MSZ-GE06/09/12NA, MSY-GE09/12NA) ø1/2 (MSZ-GE15/18NA, MSY-GE15/18NA) (with heat insulator) Indoor coil Indoor thermistor heat RT12 (main) exchanger Flared connection Indoor coil thermistor RT13 (sub) Room temperature thermistor RT11...

  • Page 90: Service Functions

    SERVICE FUNCTIONS MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSZ-GE24NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA MSY-GE24NA 7-1. TIMER SHORT MODE For service, the set time can be shortened by bridging of JPG and JPS the indoor electronic control P.C. board. The time will be shortened as follows. (Refer to 9-7.) •...
  • Page 91 7-3. AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed are memorized by the indoor electronic control P.C. board. “AUTO RESTART FUNCTION” automatically starts operation in the same mode just before the shut-off of the main power. Operation If the main power has been cut, the operation settings remain.

  • Page 92: Microprocessor Control

    MICROPROCESSOR CONTROL MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSZ-GE24NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA MSY-GE24NA WIRELESS REMOTE CONTROLLER E.g.: MSZ type MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA Signal transmitting section Operation display section OPERATE/STOP FAN SPEED CONTROL button (ON/OFF) button OFF TIMER button OPERATION SELECT button ON TIMER button...
  • Page 93 INDOOR UNIT DISPLAY SECTION Operation Indicator lamp The operation indicator at the right side of the indoor unit indicates the operation state. • The following indication applies regardless of shape of the indication. Indication Operation state Room temperature Lighted Blinking Not lighted About 4°F(2°C) or more The unit is operating to...
  • Page 94 8-3. HEAT ( ) OPERATION (MSZ) (1) Press OPERATE/STOP (ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns ON with a beep tone. (2) Select HEAT mode with OPERATION SELECT button. (3) Press TEMPERATURE buttons (TOO WARM or TOO COOL button) to select the desired temperature. The setting range is 61 ~ 88°F (16 ~ 31°C).
  • Page 95 8-6. AUTO CHANGE OVER ··· AUTO MODE OPERATION (MSZ) Once desired temperature is set, unit operation is switched automatically between COOL and HEAT operation. Mode selection (1) Initial mode When unit starts the operation with AUTO operation from OFF: • If the room temperature is higher than the set temperature, operation starts in COOL mode. •...
  • Page 96 (4) VANE AUTO ( ) mode The microprocessor automatically determines the vane angle to make the optimum room temperature distribution. In COOL and DRY operation In HEAT operation Vane angle is fixed to Horizontal position. Vane angle is fixed to Angle 5. Horizontal position (5) STOP (operation OFF) and ON TIMER standby...
  • Page 97 8-8. TIMER OPERATION 1. How to set the time (1) Check that the current time is set correctly. NOTE: Timer operation will not work without setting the current time. Initially “0:00 AM” blinks at the current time display of TIME MONITOR, so set the current time correctly with CLOCK SET button. How to set the current time (a) Press the CLOCK set button.
  • Page 98 8-9. SMART SET ( ) OPERATION (MSZ-GE06/09/12/15/18NA MSY-09/12/15/18NA) 1. How to SET SMART SET operation (1) Press OPERATE/STOP (ON/OFF) button. (2) Select COOL, HEAT (MSZ) or ECONO COOL mode. (3) Press SMART SET button. (4) Set the temperature, fan speed, and airfl ow direction for SMART SET operation. NOTE: •...

  • Page 99: Troubleshooting

    TROUBLESHOOTING MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSZ-GE24NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA MSY-GE24NA 9-1. CAUTIONS ON TROUBLESHOOTING 1. Before troubleshooting, check the following 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for miswiring. 2. Take care of the following during servicing 1) Before servicing the air conditioner, be sure to turn OFF the unit first with the remote controller, and then after confirm- ing the horizontal vane is closed, turn OFF the breaker and/or disconnect the power plug.
  • Page 100 9-2. FAILURE MODE RECALL FUNCTION Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (9-4.) disappears, the memorized failure details can be recalled. MSZ-GE06/09/12/15/18NA MSZ-GE24NA 1.
  • Page 101 2. Indoor unit failure mode table Upper lamp of OP- Abnormal point ERATION INDICA- Condition Remedy (Failure mode) TOR lamp Not lighted Normal — — The room temperature thermistor short or 1-time fl ash every Room temperature Refer to the characteristics of the room temperature open circuit is detected every 8 seconds dur- 0.5-second thermistor...
  • Page 102 9-3. INSTRUCTION OF TROUBLESHOOTING Start Indoor unit operates. Indoor unit does Indoor unit oper- OPERATION INDICATOR Outdoor unit does ates. not receive the lamp on the indoor unit is not operate normally. signal from re- Outdoor unit fl ashing ON and OFF. does not operate.
  • Page 103 9-4. TROUBLESHOOTING CHECK TABLE Before taking measures, make sure that the symptom reappears for accurate troubleshooting. When the indoor unit has started operation and detected an abnormality of the following condition (the first detection after the power ON), the indoor fan motor turns OFF and OPERATION INDICATOR lamp flashes. OPERATION INDICATOR Lighted Blinking...
  • Page 104 OPERATION INDICATOR Abnormal Remedy Operation indicator lamp Symptom Condition point Upper lamp lights and lower lamp fl ashes. The operation mode of the each indoor unit Outdoor unit MXZ type is differently set to COOL (includes DRY) and • Unify the operation mode. Operation operates but HEAT at the same time, the operation mode...
  • Page 105 9-6. TROUBLESHOOTING FLOW A Check of indoor fan motor MSZ-GE06/09/12/15/18NA MSY-GE09/12/15/18NA The indoor fan motor error has occurred, and the indoor fan does not operate. Turn OFF the power supply. Pay enough attention to the high voltage on the fan motor connector. Turn ON the power supply, wait 5 seconds or more, and then press EMERGENCY OPERATION switch.
  • Page 106 MSZ-GE24NA MSY-GE24NA The indoor fan motor error has occurred, and the indoor fan does not operate. Turn OFF the power supply. Pay enough attention to the high voltage on the fan motor connector. Turn ON the power supply, wait 5 seconds or more, and then press EMERGENCY OPERATION switch.
  • Page 107 B Check of remote controller and indoor electronic control P.C. board Check if the remote controller is exclusive for this air conditioner. MSZ-GE06/09/12/15/18NA MSY-GE09/12/15/18NA Press OPERATE/STOP (ON/OFF) 1 Look at the image of the signal transmitting section of button on the remote controller. the remote controller through the monitor of a digital camera or a camera phone.
  • Page 108 C Check of indoor P.C. board and indoor fan motor MSZ-GE06/09/12/15/18NA MSY-GE09/12/15/18NA Turn OFF the power supply. Remove indoor fan motor connector CN211 from indoor power P.C. board and vane Measure the resistance of indoor fan Short circuit: motor connector CN151 from the indoor motor.
  • Page 109 MSZ-GE24NA MSY-GE24NA Turn OFF the power supply. Remove indoor fan motor connector CN211 and Short circuit: Measure the resistance between CN211 Replace the indoor fan motor. vane motor connector CN151 from the indoor electronic of the indoor fan motor connector. control P.C.
  • Page 110 D How to check miswiring and serial signal error MSZ-GE06/09/12/15/18NA Turn OFF the power supply. MSY-GE09/12/15/18NA Is there rated voltage in the power supply? Check the power supply. Turn ON the power supply. Is there rated voltage between outdoor terminal block S1 and S2? Check the wiring.
  • Page 111 MSZ-GE24NA MSY-GE24NA Turn OFF the power supply. Is there rated voltage in the power supply? Check the power supply. Turn ON the power supply. Is there rated voltage between outdoor terminal block S1 and S2? Check the wiring. Press EMERGENCY OPERATION switch once. Does the OPERATION INDICATOR lamp light up? <Confi...
  • Page 112 E Electromagnetic noise enters into TV sets or radios Is the unit grounded? Ground the unit. Is the distance between the antennas Extend the distance between the antennas and and the indoor unit within 9.91 ft.(3 m), the indoor unit, and/or the antennas and the or is the distance between the antennas outdoor unit.
  • Page 113 9-7. Test point diagram and voltage MSZ-GE06/09/12/15/18NA/NA- MSY-GE09/12/15/18NA/NA- 1. Indoor power P.C. board, Indoor terminal P.C. board Indoor terminal P.C. board Indoor power P.C. board Varistor (NR11) Resistor (R111) Fuse (F11)( ) Indoor fan motor (CN211) 294/325 VDC (–) GND (high- voltage DC) 15 VDC (+)3-6 VDC...
  • Page 114 MSZ-GE06/09/12/15/18NA- MSY-GE09/12/15/18NA- Indoor electronic control P.C. board Timer short mode point JPG JPS (Refer to 7-1.) Room temperature thermistor RT11 (CN111) Indoor coil thermistor RT12, RT13 (CN112) Vane motor (CN151) Room temperature thermistor (RT11) Indoor coil thermistor (RT12, RT13) Connector to Indoor power P.C.
  • Page 115 MSZ-GE06/09/12/15/18NA- MSY-GE09/12/15/18NA- Indoor power P.C. board, Indoor terminal P.C. board Indoor terminal P.C. board Indoor power P.C. board Varistor (NR11) Resistor (R111) Fuse (F11)( ) Indoor fan motor (CN211) (+)0-6 V (+)3-6 VDC 15 VDC (–) GND (high- voltage DC) 294/325 VDC Terminal block...
  • Page 116 MSZ-GE24NA 3. Indoor terminal P.C. board, Indoor electronic control P.C. board, Power monitor receiver SW P.C. board Indoor terminal P.C. board Indoor electronic control P.C. board To disable "Auto restart function", Indoor coil thermistor Fuse solder the Jumper wire to JR07. Resistor Terminal Varistor...
  • Page 117 MSY-GE24NA Indoor terminal P.C. board, Indoor electronic control P.C. board, Power monitor receiver SW P.C. board Indoor terminal P.C. board Indoor electronic control P.C. board Indoor coil thermistor To disable "Auto restart function", Fuse Terminal Varistor Resistor RT12, RT13 12 VDC solder the Jumper wire to JR07.

  • Page 118: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS <"Terminal with locking mechanism" Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are two types (refer to (1) and (2)) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching.
  • Page 119 OPERATING PROCEDURE PHOTOS Electrical box 2. Removing the indoor electronic control P.C. Photo 2 Ground wire board and the room temperature thermistor (1) Remove the panel (Refer to 1.) and the corner box. (2) Remove the screw of the V.A. clamp and the V.A. Screw of the clamp.
  • Page 120 OPERATING PROCEDURE PHOTOS 4. Removing the nozzle assembly Photo 5 (1) Remove the panel (Refer to 1.) and the corner box. (2) Remove the indoor/outdoor connecting wire (Refer to 2 (2)-(7).). (3) Remove the indoor electronic control P.C. board hold- (4) Pull out the drain hose from the nozzle assembly and remove the nozzle assembly.
  • Page 121 OPERATING PROCEDURE PHOTOS 6. Removing the indoor fan motor, the indoor coil Photo 6 thermistor, and the line flow fan (1) Remove the panel (Refer to 1.) and the corner box. (2) Remove the indoor electronic control P.C. board hold- er, the electrical box and the nozzle assembly.
  • Page 122 10-2. MSZ-GE24NA MSY-GE24NA NOTE: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS 1. Removing the panel Photo 1 (1) Remove the horizontal vanes. Horizontal vanes Front panel (2) Remove the screw caps of the panel. Remove the screws of the panel. (3) Hold the lower part of both ends of the panel and pull it slightly toward you, and then remove the panel by pushing it upward.
  • Page 123 OPERATING PROCEDURE PHOTOS 4. Removing the nozzle assembly Photo 4 (1) Remove the panel (Refer to 1.) and the corner box. (2) Remove the V.A. clamp, and then the indoor/outdoor connecting wire. (Refer to 2 (2)-(4).) (3) Remove the electrical cover. (Photo 2) (4) Disconnect the following connectors on the electronic control P.C.
  • Page 124 OPERATING PROCEDURE PHOTOS 7. Removing the water cut, the indoor fan motor, Photo 8 the indoor coil thermistor, and the line flow fan (1) Remove the panel (Refer to 1.) and the corner box. (2) Remove the power monitor receiver holder, the electri- cal box and the nozzle assembly.
  • Page 125 Fixing the indoor coil thermistor There are 2 forms of parts for fixing the indoor coil thermistor. When fixing the indoor coil thermistor to the clip-shape/holder-shape part, the Clip shape Holder shape lead wire should point down. About the same length Position and procedure for mounting the clip-shape part 1.
  • Page 126 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2009 MITSUBISHI ELECTRIC CO.,LTD Distributed in Oct. 2014. No. OBH548 REVISED EDITION-D Distributed in Jul. 2011. No. OBH548 REVISED EDITION-C Distributed in Apr. 2011. No. OBH548 REVISED EDITION-B Distributed in Sep.
  • Page 127 Revision G: • The descriptions of the expansion valve coil have been corrected. (10-4.) • Some descriptions have been modified. Please void OBH549 REVISED EDITION-F. OUTDOOR UNIT No. OBH549 utilized REVISED EDITION-G SERVICE MANUAL R410A Models MUZ-GE09NA MUZ-GE09NAH MUZ-GE09NA2 MUZ-GE09NAH2 MUZ-GE12NA MUZ-GE12NAH MUZ-GE12NA2...
  • Page 128 Use the specifi ed refrigerant only Never use any refrigerant other than that specified. Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions.
  • Page 129 TECHNICAL CHANGES MUZ-GE09NA MUY-GE09NA MUZ-GE12NA MUY-GE12NA MUZ-GE15NA MUY-GE15NA MUZ-GE18NA MUY-GE18NA MUZ-GE24NA MUY-GE24NA 1. New model MUZ-GE15NA MUZ-GE15NA - MUZ-GE18NA MUZ-GE18NA - 1. Compressor has been changed. 2. Inverter P.C. board has been changed. MUY-GE15NA MUY-GE15NA - MUY-GE18NA MUY-GE18NA - 1. Compressor has been changed. 2.
  • Page 130 PART NAMES AND FUNCTIONS MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE09NA2 MUZ-GE12NA2 MUZ-GE15NA2 MUZ-GE09NAH MUZ-GE12NAH MUZ-GE15NAH MUZ-GE09NAH2 MUZ-GE12NAH2 MUZ-GE15NAH2 MUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE09NA2 MUY-GE12NA2 MUY-GE15NA2 Air inlet (back and side) Piping Drain hose Air outlet Drain outlet MUZ-GE18NA MUZ-GE18NAH MUY-GE18NA Air inlet (back and side) Piping Drain hose Air outlet...
  • Page 131 MUZ-GE24NA MUY-GE24NA Air inlet (back and side) Piping Drain hose Air outlet Drain outlet OBH549G...

  • Page 132: Connection Method

    SPECIFICATION MUZ-GE09NA MUZ-GE12NA MUZ-GE09NA2 MUY-GE09NA MUZ-GE12NA2 MUY-GE12NA Outdoor unit model MUZ-GE09NAH MUY-GE09NA2 MUZ-GE12NAH MUY-GE12NA2 MUZ-GE09NAH2 MUZ-GE12NAH2 9,000 9,000 12,000 12,000 Cooling 1 Btu/h ( 3,800 ~ 12,200 ) ( 3,800 ~ 12,200 ) ( 3,800 ~ 13,600 ) ( 3,800 ~ 13,600 ) Capacity Rated (Minimum~Maximum) 10,900...
  • Page 133 MUZ-GE15NA MUZ-GE15NA- MUY-GE15NA MUZ-GE18NA MUY-GE18NA Outdoor unit model MUZ-GE15NA2 MUY-GE15NA- MUZ-GE18NA- MUY-GE18NA- MUZ-GE15NAH MUY-GE15NA2 MUZ-GE18NAH MUZ-GE15NAH2 14,000 14,000 17,200 17,200 Cooling 1 Btu/h ( 3,100 ~ 18,200 ) ( 3,100 ~ 18,200 ) ( 3,700 ~ 18,700 ) ( 3,700 ~ 18,700 ) Capacity 18,000 21,600...
  • Page 134 Outdoor unit model MUZ-GE24NA MUY-GE24NA 22,500 22,500 Cooling 1 Btu/h (8,200 ~ 31,400) (8,200 ~ 31,400) Capacity Rated (Minimum~Maximum) 27,600 Heating 47 1 Btu/h — (7,500 ~ 36,900) Capacity Heating 17 2 Btu/h 16,000 (24,600) — Rated (Maximum) Cooling 1 1,800 (570 ~ 3,580) 1,800 (570 ~ 3,580) Power consumption Rated (Minimum~Maximum)
  • Page 135 Test condition 3, 4 Indoor air condition (°F) Outdoor air condition (°F) Mode Test Dry bulb Wet bulb Dry bulb Wet bulb "A-2" Cooling Steady State (75) at rated compressor Speed "B-2" Cooling Steady State (65) at rated compressor Speed SEER "B-1"...
  • Page 136 OUTLINES AND DIMENSIONS Unit: inch MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE09NA2 MUZ-GE12NA2 MUZ-GE15NA2 MUZ-GE09NAH MUZ-GE12NAH MUZ-GE15NAH MUZ-GE09NAH2 MUZ-GE12NAH2 MUZ-GE15NAH2 MUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE09NA2 MUY-GE12NA2 MUY-GE15NA2 REQUIRED SPACE Drain hole ø1-5/8 (GE09/12/15NA/NA2) 15-3/4 Drain hole ø1-5/16 (GE09/12/15NAH/NAH2) *1 4 in. or more when front Air in and sides of the unit are clear Air in...
  • Page 137 MUZ-GE18NA Unit: inch MUZ-GE18NAH MUY-GE18NA REQUIRED SPACE *1 20 in. more when front and sides of the unit are clear 20-9/32 11-25/32 1-9/16 Drain 3 holes Air in ø1-5/16 2-19/32 (GE18NA) Air in Drain hole ø1-5/16 (GE18NAH) 4-3/8 × 13/16 slot Air out 19-11/16 *2 When any 2 sides of left, right...
  • Page 138 MUZ-GE24NA Unit: inch MUY-GE24NA REQUIRED SPACE *1 20 in. or more when front and sides of the unit are clear 16-7/16 Air in 1-9/16 Air out 2-holes 13/32 13/16 6-7/8 19-11/16 *2 When any 2 sides of left, right and rear of the unit are clear 3-3/16 33-1/16 4-5/16...
  • Page 139 WIRING DIAGRAM MUZ-GE09NA MUZ-GE12NA MUZ-GE09NA2 MUZ-GE12NA2 OBH549G...
  • Page 140 MUZ-GE09NAH MUZ-GE12NAH MUZ-GE09NAH2 MUZ-GE12NAH2 OBH549G...
  • Page 141 MUY-GE09NA MUY-GE12NA MUY-GE09NA2 MUY-GE12NA2 OBH549G...
  • Page 142 MUZ-GE15NA MUZ-GE15NA- OBH549G...
  • Page 143 MUZ-GE15NA2 MUZ-GE15NAH OBH549G...
  • Page 144 MUZ-GE15NAH2 MUY-GE15NA OBH549G...
  • Page 145 MUY-GE15NA- MUY-GE15NA2 OBH549G...
  • Page 146 MUZ-GE18NA MUZ-GE18NA- OBH549G...
  • Page 147 MUZ-GE18NAH MUY-GE18NA OBH549G...
  • Page 148 MUY-GE18NA- OBH549G...
  • Page 149 MUZ-GE24NA OBH549G...
  • Page 150 MUY-GE24NA OBH549G...
  • Page 151 REFRIGERANT SYSTEM DIAGRAM MUZ-GE09NA MUZ-GE09NA2 Unit: inch MUZ-GE09NAH MUZ-GE09NAH2 MUY-GE09NA MUY-GE09NA2 Refrigerant pipe ø3/8 4-way valve (with heat insulator) Muffler Outdoor heat exchanger Stop valve temperature (with service port) thermistor Outdoor Muffler RT68 Discharge heat Flared connection temperature exchanger thermistor Service port RT62 Ambient...
  • Page 152 Unit: inch MUZ-GE18NA MUZ-GE18NAH MUY-GE18NA Muffler Refrigerant pipe ø 1/2 #100 4-way valve (with heat insulator) Stop valve Service port (with service port) Outdoor Flared connection Discharge heat Ambient Defrost temperature exchanger temperature thermistor thermistor thermistor RT61 RT62 RT65 Service port (MUZ) Compressor Outdoor heat...
  • Page 153 MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE Refrigerant piping: ft. Piping size O.D: in. Model Max. Length Max. Height difference Liquid MUZ-GE09/12/15NA/NA2 3/8 (GE09/12) MUZ-GE09/12/15NAH/NAH2 1/2 (GE15) MUY-GE09/12/15NA/NA2 MUZ-GE18NA MUZ-GE18NAH MUY-GE18NA MUZ-GE24NA MUY-GE24NA Indoor unit Max. Height difference Max. Length Outdoor unit ADDITIONAL REFRIGERANT CHARGE (R410A: oz.) NOTE: Refrigerant piping exceeding 25 ft.
  • Page 154 DATA 7-1. PERFORMANCE DATA 1) COOLING CAPACITY MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUZ-GE24NA MUZ-GE09NA2 MUZ-GE12NA2 MUZ-GE15NA2 MUZ-GE09NAH MUZ-GE12NAH MUZ-GE15NAH MUZ-GE18NAH MUZ-GE09NAH2 MUZ-GE12NAH2 MUZ-GE15NAH2 MUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE18NA MUY-GE24NA MUY-GE09NA2 MUY-GE12NA2 MUY-GE15NA2 Indoor air Outdoor intake air DB temperature (˚F) Model IWB (˚F) TC SHC TPC TC SHC TPC TC SHC TPC...
  • Page 155 3) HEATING CAPACITY (MUZ) Indoor air Outdoor intake air WB temperature (˚F) Model IDB (˚F) 0.45 0.57 0.67 0.74 10.6 0.78 11.0 0.79 12.4 0.82 MUZ-GE09NA 0.43 0.55 0.65 0.72 10.9 0.76 11.2 0.78 12.7 0.81 MUZ-GE09NA2 0.41 0.52 0.63 10.0 0.70 11.2 0.74 11.6 0.75 13.0 0.79 0.58 0.70 0.80...
  • Page 156 7-2. PERFORMANCE CURVE Cooling Cooling capacity (at Rated frequency) Indoor intake air WB temperature( F) Outdoor intake air DB temperature(°F) MUZ-GE09NA MUZ-GE09NA2 MUZ-GE12NA MUZ-GE12NA2 MUZ-GE09NAH MUZ-GE09NAH2 MUZ-GE12NAH MUZ-GE12NAH2 MUY-GE09NA MUY-GE09NA2 MUY-GE12NA MUY-GE12NA2 SHF at rating condition = 0.76 SHF at rating condition = 0.73 = 350 CFM Airflow = 307 CFM...
  • Page 157 Heating (MUZ) Heating capacity (at Rated frequency) Outdoor intake air WB temperature (°F) MUZ-GE09NA MUZ-GE09NA2 MUZ-GE09NAH MUZ-GE09NAH2 Airflow = 413 CFM Airflow = 413 CFM Outdoor intake air WB temperature (°F) Outdoor intake air WB temperature (°F) MUZ-GE12NA MUZ-GE12NA2 MUZ-GE12NAH MUZ-GE12NAH2 Airflow = 413 CFM Airflow...
  • Page 158 MUZ-GE18NA MUZ-GE18NAH Airflow = 512 CFM Airflow = 512 CFM Outdoor intake air WB temperature (°F) Outdoor intake air WB temperature (°F) MUZ-GE24NA Airflow = 738 CFM Outdoor intake air WB temperature (°F) This value of frequency is not the same as the actual frequency in operating. Refer to 7-5 and 7-6 for the relationships between frequency and capacity.
  • Page 159 MUZ-GE12NA MUZ-GE12NA2 MUZ-GE12NAH MUZ-GE12NAH2 MUY-GE12NA MUY-GE12NA2 (PSIG) (PSIG) 6870 100 105 (°F) 6870 100 105 (°F) Outdoor ambient temperature Outdoor ambient temperature MUZ-GE15NA MUZ-GE15NA2 MUZ-GE15NAH MUZ-GE15NAH2 MUY-GE15NA MUY-GE15NA2 (PSIG) (PSIG) 6870 100 105 68 70 100 105(°F) (°F) Outdoor ambient temperature Outdoor ambient temperature MUZ-GE18NA MUZ-GE18NAH...
  • Page 160 MUZ-GE24NA MUY-GE24NA (PSIG) (PSIG) 6870 100 105 (°F) 6870 100 105 (°F) Outdoor ambient temperature Outdoor ambient temperature Heating (MUZ) Data is based on the condition of outdoor humidity 75%. Air flow should be set to High speed. Data is for heating operation without any frost. MUZ-GE09NA MUZ-GE09NA2 MUZ-GE09NAH...
  • Page 161 MUZ-GE12NA MUZ-GE12NA2 MUZ-GE12NAH MUZ-GE12NAH2 (PSIG) (PSIG) 58Hz 58Hz 75 (°F) 75 (°F) Outdoor ambient temperature Outdoor ambient temperature MUZ-GE15NA MUZ-GE15NA2 MUZ-GE15NAH MUZ-GE15NAH2 (PSIG) (PSIG) 54Hz 54Hz 75 (°F) 75 (°F) Outdoor ambient temperature Outdoor ambient temperature OBH549G...
  • Page 162 MUZ-GE18NA MUZ-GE18NAH (PSIG) (PSIG) 58Hz 58Hz 75 (°F) 75 (°F) Outdoor ambient temperature Outdoor ambient temperature MUZ-GE24NA (PSIG) (PSIG) 58Hz 58Hz 75 (°F) 75 (°F) Outdoor ambient temperature Outdoor ambient temperature OBH549G...
  • Page 163 7-4. STANDARD OPERATION DATA MSZ-GE09NA MSZ-GE12NA Model MSZ-GE09NA MSZ-GE12NA MSY-GE09NA MSY-GE12NA Item Unit Cooling Heating Cooling Heating Capacity Btu/h 9,000 10,900 12,000 14,400 0.82 — 0.74 — Input 0.660 0.760 0.960 1.170 Rated frequency 59.5 77.5 69.0 77.0 Indoor unit MSZ-GE09NA, MSY-GE09NA MSZ-GE12NA, MSY-GE12NA Power supply (V, Phase, Hz)
  • Page 164 MSZ-GE15NA MSZ-GE18NA Model MSZ-GE15NA MSZ-GE18NA MSY-GE15NA MSY-GE18NA Item Unit Cooling Heating Cooling Heating Capacity Btu/h 14,000 18,000 17,200 21,600 0.80 — 0.71 — Input 1.080 1.600 1.640 1.900 Rated frequency 55.5 74.0 83.0 84.0 Indoor unit MSZ-GE15NA, MSY-GE15NA MSZ-GE18NA, MSY-GE18NA Power supply (V, Phase, Hz) 208/230, 1, 60 Input...
  • Page 165 MSZ-GE24NA Model MSZ-GE24NA MSY-GE24NA Item Unit Cooling Heating Capacity Btu/h 22,500 27,600 0.75 — Input 1.800 2.340 Rated frequency 66.5 82.0 Indoor unit MSZ-GE24NA, MSY-GE24NA Power supply (V, Phase, Hz) 208/230, 1, 60 Input 0.058 Fan motor current 0.56/0.51 MUZ-GE24NA Outdoor unit MUZ-GE24NA MUY-GE24NA...
  • Page 166 7-5. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY MUZ-GE09NA MUZ-GE09NA2 MUZ-GE09NAH MUZ-GE09NAH2 MUZ-GE09NA MUZ-GE09NA2 MUY-GE09NA MUY-GE09NA2 MUZ-GE09NAH MUZ-GE09NAH2 Correction of Cooling capacity Correction of Cooling total input Correction of Heating total input Correction of Heating capacity (Hz) (Hz) (Hz) (Hz) The operational frequency of compressor The operational frequency of compressor...
  • Page 167 MUZ-GE24NA MUY-GE24NA MUZ-GE24NA Correction of Cooling capacity Correction of Cooling total input Correction of Heating total input Correction of Heating capacity 150(Hz) 150(Hz) 150(Hz) 150(Hz) The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor 7-6.
  • Page 168 ACTUATOR CONTROL MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUZ-GE24NA MUZ-GE09NA2 MUZ-GE12NA2 MUZ-GE15NA2 MUZ-GE09NAH MUZ-GE12NAH MUZ-GE15NAH MUZ-GE18NAH MUZ-GE09NAH2 MUZ-GE12NAH2 MUZ-GE15NAH2 MUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE18NA MUY-GE24NA MUY-GE09NA2 MUY-GE12NA2 MUY-GE15NA2 8-1. OUTDOOR FAN MOTOR CONTROL The fan motor turns ON/OFF, interlocking with the compressor. [ON] The fan motor turns ON 5 seconds before the compressor starts up. [OFF] The fan motor turns OFF 15 seconds after the compressor has stopped running.
  • Page 169 SERVICE FUNCTIONS MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUZ-GE24NA MUZ-GE09NA2 MUZ-GE12NA2 MUZ-GE15NA2 MUZ-GE09NAH MUZ-GE12NAH MUZ-GE15NAH MUZ-GE18NAH MUZ-GE09NAH2 MUZ-GE12NAH2 MUZ-GE15NAH2 MUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE18NA MUY-GE24NA MUY-GE09NA2 MUY-GE12NA2 MUY-GE15NA2 9-1. CHANGE IN DEFROST SETTING (MUZ) Changing defrost finish temperature <JS> To change the defrost finish temperature, cut/solder the JS wire of the outdoor inverter P.C. board. (Refer to 10-6.1.) Defrost fi...
  • Page 170 TROUBLESHOOTING MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUZ-GE24NA MUZ-GE09NA2 MUZ-GE12NA2 MUZ-GE15NA2 MUZ-GE09NAH MUZ-GE12NAH MUZ-GE15NAH MUZ-GE18NAH MUZ-GE09NAH2 MUZ-GE12NAH2 MUZ-GE15NAH2 MUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE18NA MUY-GE24NA MUY-GE09NA2 MUY-GE12NA2 MUY-GE15NA2 10-1. CAUTIONS ON TROUBLESHOOTING 1. Before troubleshooting, check the following 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for miswiring.
  • Page 171 10-2. FAILURE MODE RECALL FUNCTION Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (10-3.) disappears, the memorized failure details can be recalled. MSZ-GE24NA MSZ-GE06/09/12/15/18NA 1.
  • Page 172 2. Flow chart of the detailed outdoor unit failure mode recall function Operational procedure The outdoor unit might be abnormal. Check if outdoor unit is abnormal according to the following procedures. Make sure that the remote controller is set to the failure mode recall func- tion.
  • Page 173 3. Outdoor unit failure mode table OPERATION Indoor/ Outdoor unit INDICATOR Abnormal point LED indication outdoor unit Condition Remedy failure mode upper lamp (Failure mode / protection) (Outdoor P.C. board) failure mode recall function (Indoor unit) recall function None (Normal) —...
  • Page 174 3. Outdoor unit failure mode table OPERATION Indoor/ Outdoor unit INDICATOR Abnormal point LED indication outdoor unit Condition Remedy failure mode upper lamp (Failure mode / protection) (Outdoor P.C. board) failure mode recall function (Indoor unit) recall function 11-time fl ash DC voltage 8-time fl...
  • Page 175 10-3. TROUBLESHOOTING CHECK TABLE Abnormal point/ No. Symptom LED indication Condition Remedy Condition Outdoor 1-time fl ash every Outdoor power sys- Overcurrent protection cut-out operates 3 consecutive times with- • Reconnect connector of compressor. unit does 2.5 seconds in 1 minute after the compressor gets started, or failure of restart •...
  • Page 176 10-3. TROUBLESHOOTING CHECK TABLE Abnormal point/ No. Symptom LED indication Condition Remedy Condition Outdoor 7-time fl ash Low discharge tem- Temperature of discharge temperature thermistor has been • Refer to 10-5. "Check of LEV". unit oper- 2.5 seconds OFF perature protection 122°F (50°C) or less for 20 minutes.
  • Page 177 Part name Check method and criterion Figure Measure the resistance between lead wires using a tester. (Temperature: -4 ~ 104°F (-20 ~ 40°C)) RED BLK Normal (Ω) Color of lead wire Outdoor fan motor GE09/12 GE15 GE18/24 RED – BLK BLK –...
  • Page 178 10-5. TROUBLESHOOTING FLOW A How to check inverter/compressor Disconnect the connector between compressor and the intelligent power module (IPM)/power module (IPM) 1. See 10-5. “Check of open phase”. Check the voltage between terminals. Are the voltages balanced? Replace the inverter P.C. board. Check the compressor.
  • Page 179 D Check of compressor winding ● Disconnect the connector between the compressor and intelligent power module/power module 1, and measure the resis- tance between the compressor terminals. <<Measurement point>> At 3 points BLK - WHT BLK - RED Measure the resistance between the lead wires at 3 points. WHT - RED <<Judgement>>...
  • Page 180 G Check of outdoor thermistors Disconnect the connector of thermistor in the inverter P.C. board (see below table), and measure the resistance of thermistor. Replace the thermistor except RT64. When RT64 is Is the resistance of thermistor normal? (Refer to 10-6.1.) abnormal, replace the inverter P.C.
  • Page 181 Unit operates HEAT mode even if it is set to COOL mode. Disconnect connector between the compressor and intelligent power Is there 230 VAC between CN721 (MUZ- module/ power module 1. GE09/12/15/18)/CN602 (MUZ-GE24) Replace the inverter Turn ON the power supply and press on the inverter P.C.
  • Page 182 J Check of power supply MUZ-GE09/12/15NA/NA2/NAH/NAH2 MUZ-GE18NA/NAH MUY-GE09/12/15NA/NA2 MUY-GE18NA Intelligent power module: MUZ-GE09/12/15/18/24NA, MUY-GE09/12/15/18/24NA Power module: Other models Disconnect the connector (CN61) between compressor and intelligent power module/ power module 1. Rectify indoor/outdoor Turn ON power supply and press connecting wire. EMERGENCY OPERATION switch.
  • Page 183 K Check of LEV (Expansion valve) MSZ-GE06/09/12/15/18NA MSZ-GE24NA MSY-GE09/12/15/18NA MSY-GE24NA Turn ON the power supply. <Preparation of the remote controller> While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time, press RESET button. First, release RESET button.
  • Page 184 L Check of inverter P.C. board Check the outdoor fan motor. (Refer to 10-5. .) Is the fuse (F901) blown on the in- verter P.C. board? Check the connection of the connectors (CN931 , CN932) of the outdoor fan motor. If the connection is poor, make it correct.
  • Page 185 M How to check miswiring and serial signal error Turn OFF the power supply. Is there rated voltage in the power supply? Check the power supply. Turn ON the power supply. Is there rated voltage between outdoor terminal block S1 and S2? Check the wiring.
  • Page 186 N Electromagnetic noise enters into TV sets or radios Is the unit grounded? Ground the unit. Is the distance between the antennas Extend the distance between the antennas and and the indoor unit within 9.91 ft., or is the indoor unit, and/or the antennas and the the distance between the antennas and outdoor unit.
  • Page 187 10-6. TEST POINT DIAGRAM AND VOLTAGE 1. Inverter P.C. board MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE09NA2 MUZ-GE12NA2 MUZ-GE15NA2 MUZ-GE09NAH MUZ-GE12NAH MUZ-GE15NAH MUZ-GE09NAH2 MUZ-GE12NAH2 MUZ-GE15NAH2 MUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE09NA2 MUY-GE12NA2 MUY-GE15NA2 Bus-bar voltage Smoothing Smoothing Smoothing Heater connector Back side of unit DB61 capacitor capacitor capacitor...
  • Page 188 MUZ-GE18NA MUZ-GE18NAH MUY-GE18NA R.V.coil Bus-bar voltage Smoothing Smoothing Smoothing Fuse (F701) Back side of unit (CN721) DB61 capacitor capacitor capacitor T3.15AL250V 208/230 260-325 VDC (C63) (C62) (C61) Fuse (F801) 208/230 VAC (MUZ) T3.15AL250V Heater con- nector (CN722) MUZ-GE• Fuse (F901) T3.15AL250V Output to drive...
  • Page 189 Fuse (F62) Fuse (F601) R.V. coil (CN602) MUZ-GE24NA T2.0AL250V T3.15AL250V (MUZ) 208/230 VAC (MUZ) MUY-GE24NA Jumper wire for changing defrost setting (JS) (MUZ) Jumper wire for pre-heat control setting (JK) Signal of out- Defrost thermistor door fan motor /RT61 (CN671) (MUZ) (CN931) Discharge temperature thermistor/RT62...
  • Page 190 DISASSEMBLY INSTRUCTIONS <"Terminal with locking mechanism" Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are two types (refer to (1) and (2)) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching.
  • Page 191 OPERATING PROCEDURE PHOTOS 2. Removing the inverter assembly, inverter P.C. board Screws of the Photo 4 terminal block (1) Remove the cabinet and panels. (Refer to 1.) support and the (2) Disconnect the lead wire to the reactor and the following Screw of the heat sink back panel connectors:...
  • Page 192 OPERATING PROCEDURE PHOTOS Photo 7 4. Removing the discharge temperature thermistor, defrost thermistor, outdoor heat exchanger tempera- ture thermistor and ambient temperature thermistor (1) Remove the cabinet and panels. (Refer to 1.) Outdoor heat (2) Disconnect the lead wire to the reactor and the following exchanger tempera- connectors: ture thermistor...
  • Page 193 11-2. MUZ-GE18NA MUZ-GE18NAH MUY-GE18NA NOTE: Turn OFF power supply before disassembly. OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 (1) Remove the screws of the service panel. Screw of the top panel Screws of the cabinet (2) Remove the screws of the top panel. (3) Remove the screw of the valve cover.
  • Page 194 OPERATING PROCEDURE PHOTOS 2. Removing the inverter assembly, inverter P.C. board Photo 3 Screw of the heat sink (1) Remove the cabinet and panels. (Refer to 1.) support and the separator (2) Disconnect the lead wire to the reactor and the following con- nectors: Screws of <Inverter P.C.
  • Page 195 OPERATING PROCEDURE PHOTOS 4. Removing the discharge temperature thermistor, Photo 6 defrost thermistor, outdoor heat exchanger tempera- Outdoor heat Ambient tem- exchanger tempera- perature ture thermistor and ambient temperature thermistor ture thermistor thermistor (1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the lead wire to the reactor and the following connectors: <Inverter P.C.
  • Page 196 11-3. MUZ-GE24NA MUY-GE24NA NOTE: Turn OFF power supply before disassembly. OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 (1) Remove the screws of the service panel. Screws of the top panel (2) Remove the screws of the top panel. (3) Remove the screw of the valve cover.
  • Page 197 OPERATING PROCEDURE PHOTOS 2. Removing the inverter assembly, inverter P.C. board Photo 4 (1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the lead wire to the reactor and the following con- Screw of the nectors: relay panel Screws of the <Inverter P.C.
  • Page 198 OPERATING PROCEDURE PHOTOS 4. Removing the discharge temperature thermistor, Photo 6 defrost thermistor, outdoor heat exchanger tempera- Outdoor heat Ambient tem- exchanger tempera- ture thermistor and ambient temperature thermistor perature ture thermistor thermistor (1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the lead wire to the reactor and the following connectors: <Inverter P.C.
  • Page 199 OBH549G...
  • Page 200 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2009 MITSUBISHI ELECTRIC CORPORATION Distributed in Jan. 2015. No. OBH 549 REVISED EDITION-G Distributed in Dec. 2013. No. OBH 549 REVISED EDITION-F Distributed in Apr. 2012. No. OBH 549 REVISED EDITION-E Distributed in Apr.
  • Page 201 1607 CY Ave, Ste 303 SUBMITTAL Casper, WY 82604 Phone: 307-266-5033 REVIEW M2a Mail@EDAengineering.com PROJECT: ENGINEER’S PROJECT NO: 12110 Kelly Walsh High School CONTRACTOR: DATE RECEIVED: 9/24/14 K K Mechanical ENGINEER: DATE RETURNED: Ginnie Schofield, Mechanical Engineer 9-29-2014 Ken Hilton, P.E., Project Engineer Review is for the limited purpose of verifying compliance with the specified products, Action Codes: and/or conformance to a reasonably inferable intent of the design, as expressed in...
  • Page 202 SUBMITTAL FORM 307/426-4050 2701 Westland Ct Ste. A Cheyenne, WY 82001 1213 West Allison road Cheyenne, WY 82007 FAX: 307/426-4051 238127-2-0 SUBMITTAL # RB+B Architects, Inc. FIRST SUBMITTAL RESUBMITTAL ADDITIONAL INFO. Kelly Walsh High School SHOP DRAWING PROJECT: PRODUCT DATA SAMPLE/OTHER 9/4/2014 13011...
  • Page 203 Kelly Walsh High School tim.farber 09/04/2014 Submittal Title Sheet Subcontractor Name: KK Mechanical Date Submitted: 8/27/14 HVAC Division – Section – Small Split System Cooling 238127 Small Split System Cooling (Re Submittal) Page: 2-11 Model: DAC-1 Page: Model: DAC-2 Thru 7 7-12 Page: Model:...
  • Page 204 Midgley-Huber, Inc. ________________________________________Submittal___________________________________ Job: Kelly Walsh High School Contractor: North Star HVAC Section 238127 Small Split System Cooling _______________________________________________________________________________________...
  • Page 205 □ Simple MA Remote Controller (PAC-YT53CRAU requires MAC-333IF)* *See Submittal for information on each option. □ System Control Interface (MAC-333IF) Note: Low ambient is not an option for this model Specifications are subject to change without notice. © 2013 Mitsubishi Electric US, Inc.
  • Page 206 Connection Method ....... . . Flared Minimum 60º F (16º C) WB 13º F (-11º C) WB Notes: Specifications are subject to change without notice. © 2013 Mitsubishi Electric US, Inc.
  • Page 207 (using spacer): 5-1/8 or more MUZ-D36NA-1 1340 Satellite Boulevard Suwanee, GA 30024 Tele: 678-376-2900 • Fax: 800-889-9904 Toll Free: 800-433-4822 www.mehvac.com FORM# MSZ-D36NA-8 ~ MUZ-D36NA-1 - 201311 Specifications are subject to change without notice. © 2013 Mitsubishi Electric US, Inc.
  • Page 208 (PAR-31MAA requires MAC-333IF) □ System Control Interface (MAC-333IF) □ Remote Temperature Sensor (M21-JKO-307) □ Lockdown Bracket for Hand-held Controller (RCMKP1CB) Note: Low ambient is not available with this model Specifications are subject to change without notice. © 2013 Mitsubishi Electric US, Inc.
  • Page 209 65º F (18º C) WB Heating 70º F (21º C) DB -4º F (-20º C) DB Minimum 60º F (16º C) WB -5º F (-21º C) WB Notes: Specifications are subject to change without notice. © 2013 Mitsubishi Electric US, Inc.
  • Page 210 DIMENSIONS: MSZ-GE24NA & MUZ-GE24NA MSZ-GE24NA MUZ-GE24NA 1340 Satellite Boulevard Suwanee, GA 30024 Tele: 678-376-2900 • Fax: 800-889-9904 Toll Free: 800-433-4822 www.mehvac.com FORM# MSZ-GE24NA & MUZ-GE24NA - 201311 Specifications are subject to change without notice. © 2013 Mitsubishi Electric US, Inc.
  • Page 211 □ Simple MA Remote Controller (PAC-YT53CRAU requires MAC-333IF)* *See Submittal for information on each option. □ System Control Interface (MAC-333IF) Note:Low ambient is not available with this model. Specifications are subject to change without notice. © 2014 Mitsubishi Electric US, Inc.
  • Page 212 (Min.) -13º F (-25º C) DB / -15º F (-26º C) WB** ** System cuts out at -18º F (-28º C) to avoid thermistor error, but recovers from cutout operation and automatically restarts at -13º F (-25ºC). Notes: Specifications are subject to change without notice. © 2014 Mitsubishi Electric US, Inc.
  • Page 213 1340 Satellite Boulevard Suwanee, GA 30024 Tele: 678-376-2900 • Fax: 800-889-9904 Toll Free: 800-433-4822 www.mehvac.com FORM# MSZ-GE15NA-8 ~ MUZ-GE15NA2 - 201403 Specifications are subject to change without notice. © 2014 Mitsubishi Electric US, Inc.
  • Page 214 3400 Lawrenceville Suwanee Rd Suwanee, GA 30024 FORM# MHK1 - 201108 Tele: 678-376-2900 • Fax: 800-889-9904 RedLINK is a trademark of Honeywell, Inc. Toll Free: 800-433-4822 (#3) www.mehvac.com © 2011 MITSUBISHI ELECTRIC & ELECTRONICS, INC. Specifications are subject to change without notice.

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