Table of Contents
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SPLIT-TYPE AIR CONDITIONERS
OUTDOOR UNIT
SERVICE MANUAL
Models
MUZ-GE09NA
MUZ-GE15NA
MUZ-GE24NA
MUY-GE12NA
MUZ-GE09/12/15NA
MUY-GE09/12/15NA
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
Revision B:
• Descriptions regarding the outdoor fan motor
have been corrected.
Please void OBH549 REVISED EDITION-A.
HFC
utilized
R410A
Indoor unit service manual
MSZ-GE•NA MSY-GE•NA Series (OBH548)
CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS ····················· 3
3. SPECIFICATION ················································ 4
4. OUTLINES AND DIMENSIONS ························ 8
5. WIRING DIAGRAM ·········································· 10
6. REFRIGERANT SYSTEM DIAGRAM ············· 15
7. DATA ································································ 18
8. ACTUATOR CONTROL ··································· 30
9. SERVICE FUNCTIONS ··································· 31
10. TROUBLESHOOTING ····································· 31
11. DISASSEMBLY INSTRUCTIONS ···················· 49
PARTS CATALOG (OBB549)
No. OBH549
REVISED EDITION-B
TM
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Table of Contents
Troubleshooting
Related Manuals for Mitsubishi Electric Mr.Slim MUZ-GE09NA
Summary of Contents for Mitsubishi Electric Mr.Slim MUZ-GE09NA
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Page 1: Outdoor Unit
• Descriptions regarding the outdoor fan motor have been corrected. SPLIT-TYPE AIR CONDITIONERS Please void OBH549 REVISED EDITION-A. OUTDOOR UNIT SERVICE MANUAL No. OBH549 utilized REVISED EDITION-B R410A Models MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUZ-GE24NA MUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE18NA Indoor unit service manual MUY-GE24NA MSZ-GE•NA MSY-GE•NA Series (OBH548) -
Page 2: Technical Changes
Revision A: • MUZ-GE24NA and MUY-GE24NA have been added. Revision B: • Descriptions regarding the outdoor fan motor have been corrected. TECHNICAL CHANGES MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUZ-GE24NA MUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE18NA MUY-GE24NA 1. New model... -
Page 3: Part Names And Functions
PART NAMES AND FUNCTIONS MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUY-GE09NA MUY-GE12NA MUY-GE15NA Air inlet (back and side) Piping Drain hose Air outlet Drain outlet MUZ-GE18NA MUY-GE18NA Air inlet (back and side) Piping Drain hose Air outlet Drain outlet MUZ-GE24NA MUY-GE24NA Air inlet... -
Page 4: Specification
SPECIFICATION Outdoor unit model MUZ-GE09NA MUY-GE09NA MUZ-GE12NA MUY-GE12NA 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 14,400... - Page 5 Outdoor unit model MUZ-GE15NA MUY-GE15NA MUZ-GE18NA MUY-GE18NA 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 Rated (Minimum~Maximum) 18,000 21,600 Heating 47 1 Btu/h —...
- Page 6 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 24,600 — Cooling 1 1,800 (570 ~ 3,580) 1,800 (570 ~ 3,580) Power consumption Rated (Minimum~Maximum) Heating 47 1...
- Page 7 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"...
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Page 8: Outlines And Dimensions
OUTLINES AND DIMENSIONS MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA Unit: inch MUY-GE09NA MUY-GE12NA MUY-GE15NA REQUIRED SPACE Basically open 4 inch or more without any obstruction in front 15-3/4 Drain hole 1-5/8 and on both sides of the unit. Air in Air in 1-9/16... - Page 9 MUZ-GE24NA Unit: inch MUY-GE24NA REQUIRED SPACE 20 in. or more 16-7/16 Air in 1-9/16 4 in. or more Air out 2-holes 13/32 13/16 19-11/16 6-7/8 20 in. or more 3-3/16 33-1/16 4-5/16 Service panel Liquid refrigerant pipe joint Refrigerant pipe (flared) Ø...
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Page 10: Wiring Diagram
WIRING DIAGRAM MUZ-GE09NA MUZ-GE12NA MUY-GE09NA MUY-GE12NA... - Page 11 MUZ-GE15NA MUY-GE15NA...
- Page 12 MUZ-GE18NA MUY-GE18NA...
- Page 13 MUZ-GE24NA...
- Page 14 MUY-GE24NA...
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Page 15: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM MUZ-GE09NA MUY-GE09NA Unit: inch 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 16 MUZ-GE18NA MUY-GE18NA Unit: inch 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 17 Outdoor unit ADDITIONAL REFRIGERANT CHARGE (R410A: oz.) NOTE: Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation. Refrigerant piping length (one way): ft. Outdoor unit Model precharged MUZ-GE09NA 1 lb. 12 oz. MUY-GE09NA MUZ-GE12NA 1.62 4.86 8.10 11.34...
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Page 18: Data.
DATA 7-1. PERFORMANCE DATA 1) COOLING CAPACITY MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUZ-GE24NA MUY-GE09NA MUY-GE12VA MUY-GE15VA MUY-GE18VA MUY-GE24VA Indoor air Outdoor intake air DB temperature (˚F) Model IWB (˚F) SHC TPC SHC TPC SHC TPC SHC TPC SHC TPC 11.0 0.59 10.3 0.64... - Page 19 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 0.41 0.52 0.63 10.0 0.70...
- Page 20 MUY-GE24NA SHF at rating condition = 0.75 = 634 CFM Airflow Outdoor intake air DB temperature (°F) Heating (MUZ) MUZ-GE09NA Heating capacity (at Rated frequency) = 413 CFM Airflow Outdoor intake air WB temperature (°F) Outdoor intake air Wet-bulb temperature (°F)
- Page 21 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. 7-3. CONDENSING PRESSURE Cooling Data is based on the condition of indoor humidity 50 %. Air flow should be set to High speed. MUZ-GE09NA MUY-GE09NA (PSIG) (PSIG) 68 70 100 105 (°F)
- Page 22 MUZ-GE15NA MUY-GE15NA (PSIG) (PSIG) 68 70 100 105(°F) 68 70 100 105 (°F) Outdoor ambient temperature Outdoor ambient temperature MUZ-GE18NA MUY-GE18NA (PSIG) (PSIG) 68 70 100 105(°F) 68 70 100 105(°F) Outdoor ambient temperature Outdoor ambient temperature MUZ-GE24NA MUY-GE24NA (PSIG) (PSIG) 68 70 100 105 (°F)
- Page 23 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 (PSIG) (PSIG) 58Hz 58Hz 75 (°F) 75 (°F) Outdoor ambient temperature...
- Page 24 MUZ-GE18NA (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...
- Page 25 Power supply (V, Phase, Hz) 208 / 230, 1, 60 Input 0.022 0.023 0.022 0.023 Fan motor current 0.24/0.22 0.25/0.23 0.24/0.22 0.25/0.23 MUZ-GE09NA MUZ-GE12NA Outdoor unit MUZ-GE09NA MUZ-GE12NA MUY-GE09NA MUY-GE12NA Power supply (V, phase, Hz) 208/230, 1, 60 Input 0.638 0.737 0.938...
- Page 26 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 27 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 28 7-5. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY MUZ-GE09NA MUY-GE09NA MUZ-GE09NA 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 29 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.
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Page 30: Actuator Control
ACTUATOR CONTROL MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUZ-GE24NA MUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE18NA MUY-GE24NA 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 31: Service Functions
SERVICE FUNCTIONS MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUZ-GE24NA MUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE18NA MUY-GE24NA 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 32: Failure Mode Recall Function
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 33 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 34 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) —...
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Page 35: Troubleshooting Check Table
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 stop is continuously performed 3 times • Reconnect connector of compressor. unit does 2.5 seconds within 1 minute after the compressor gets started, or failure of re- •... - Page 36 10-4. TROUBLE CRITERION OF MAIN PARTS MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUZ-GE24NA MUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE18NA MUY-GE24NA Part name Check method and criterion Figure Defrost thermistor (RT61) (MUZ) Fin temperature thermistor (RT64) Measure the resistance with a tester. Ambient temperature Refer to 10-6. “Test point diagram and voltage”, 1. “Inverter P.C.
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Page 37: A How To Check Inverter/Compressor
10-5. TROUBLESHOOTING FLOW A How to check inverter/compressor Disconnect the connector between compressor and the intelligent power module (IPM). 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. See 10-5. - Page 38 D Check of compressor winding ● Disconnect the connector between the compressor and intelligent power module, and measure the resistance between the compressor terminals. <<Measurement point>> at 3 points BLK - WHT Measure the resistance between the lead wires at 3 points. BLK - RED WHT - RED <<Judgement>>...
- Page 39 G 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. When RT64 is Is the resistance of thermistor normal? (Refer to 10-6.1.) abnormal, replace the inverter P.C.
- Page 40 I Check of outdoor fan motor Disconnect the connectors CN931 and CN932 from the inverter P.C. board.Check the connec- tion 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 the inverter P.C.
- Page 41 J Check of power supply MUZ-GE09/12/15/18NA MUY-GE09/12/15/18NA Disconnect the connector (CN61) between compressor and intelligent power module. Rectify indoor/outdoor Turn ON power supply and press connecting wire. EMERGENCY OPERATION switch. Does The upper lamp of Is there voltage 208/230 VAC Replace the indoor OPERATION INDICATOR lamp on between the indoor terminal...
- Page 42 K Check of LEV (Expansion valve) MSZ-GE24NA MSZ-GE06/09/12/15/18NA MSY-GE24NA MSY-GE09/12/15/18NA 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 43 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 44 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 45 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 46 10-6. TEST POINT DIAGRAM AND VOLTAGE 1. Inverter P.C. board MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUY-GE09NA MUY-GE12NA MUY-GE15NA Smoothing Smoothing Smoothing Bus-bar voltage capacitor capacitor capacitor Fuse (F701) DB61 Back side of unit (C63) (C62) (C61) 260-325 VDC T3.15AL250V Fuse (F801) 208/230 VAC T3.15AL250V...
- Page 47 MUZ-GE18NA MUY-GE18NA Smoothing Smoothing Smoothing R.V.coil Bus-bar voltage capacitor capacitor capacitor Fuse (F701) (CN721) DB61 Back side of unit (C63) (C62) (C61) T3.15AL250V 208/230 260-325 VDC Fuse (F801) (MUZ) 208/230 VAC T3.15AL250V Fuse (F901) T3.15AL250V Output to drive compressor 208/230 (LDU, LDV, LDW)
- Page 48 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...
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Page 49: Disassembly Instructions
Pull the terminal while pull out the terminal pushing the locking slowly. Locking lever lever. Connector 11-1. MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUY-GE09NA MUY-GE12NA MUY-GE15NA NOTE: Turn OFF power supply before disassembly. OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 (1) Remove the screw fixing the service panel. - Page 50 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 Screws of the heat sink back panel connectors:...
- Page 51 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 52 11-2. MUZ-GE18NA 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 53 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 54 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 55 11-3. MUZ-GE24NA MUY-GE24NA NOTE: Turn OFF power supply before disassembly. OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 Screws of the top panel (1) Remove the screws of the service panel. (2) Remove the screws of the top panel. (3) Remove the screw of the valve cover.
- Page 56 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 57 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 58 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2009 MITSUBISHI ELECTRIC CO.,LTD Distributed in Dec. 2010. No. OBH 549 REVISED EDITION-B Distributed in Sep. 2010. No. OBH 549 REVISED EDITION-A 5 New publication, effective Dec. 2010 Distributed in Jul.