Mitsubishi Electric MUZ-GX09NL-U1 Technical & Service Manual
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Mitsubishi Electric MUZ-GX09NL-U1 Technical & Service Manual

Mitsubishi Electric MUZ-GX09NL-U1 Technical & Service Manual

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OUTDOOR UNIT
TECHNICAL &
SERVICE MANUAL
Models
MUZ-GX09NL
-
MUZ-GX12NL
-
MUZ-GX15NL
-
MUZ-GX18NL
-
MUZ-GX24NL
-
MUZ-GX30NL
-
MUZ-GX36NL
-
Indoor unit technical & service manual
MSZ-GX•NL, MSY-GX•NL Series (OBD950)
Indoor unit service manual
MSZ-GX•NL, MSY-GX•NL Series (OBH950)
MUZ-GX18NL
MUZ-GX24NL
MUZ-GX30NL
MUZ-GX36NL
MUZ-GX18NLHZ
MUZ-GX24NLHZ
MUZ-GX09NLHZ
U1
MUZ-GX12NLHZ
U1
MUZ-GX15NLHZ
U1
MUZ-GX18NLHZ
U1
MUZ-GX24NLHZ
U1
U1
U1
MUY-GX18NL
MUY-GX24NL
MUY-GX30NL
MUY-GX36NL
Revision A:
• MUZ-GX09/12/15NL -
,
U1
MUZ-GX09/12/15NLHZ -
U1
have been added.
•12. DISASSEMBLY INSTRUCTIONS has been corrected.
OBD951 is void.
HFC
utilized
R454B
MUY-GX09NL
-
U1
MUY-GX12NL
-
U1
MUY-GX15NL
-
U1
MUY-GX18NL
-
U1
MUY-GX24NL
-
U1
MUY-GX30NL
MUY-GX36NL
Outdoor unit service manual
MUZ-GX•NL/NLHZ, MUY-GX•NL Series
(OBH951)
CONTENTS
1. TECHNICAL CHANGES ······························ 3
USING REFRIGERANT R454B ····················· 4
3. PART NAMES AND FUNCTIONS ·················10
4. SPECIFICATION········································ 11
5. OUTLINES AND DIMENSIONS ····················18
6. WIRING DIAGRAM ····································20
7. REFRIGERANT SYSTEM DIAGRAM ············25
8. DATA ·······················································28
9. ACTUATOR CONTROL ······························52
10. SERVICE FUNCTIONS ·······························53
11. TROUBLESHOOTING ································54
12. DISASSEMBLY INSTRUCTIONS ··················80
14. NOISE CRITERION CURVES ·······················92
IN LOW AMBIENT TEMPERATURE ··············95
16. PERFORMANCE CHART ·························· 101
FOR PIPING LENGTH ······························ 125
18. PART LOAD CAPACITY CHART ················ 126
and MUY-GX09/12/15NL -
U1
No. OBD951
REVISED EDITION-A
-
U1
-
U1
-
U1
-
U1
-
U1
-
U1
-
U1

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Summary of Contents for Mitsubishi Electric MUZ-GX09NL-U1

  • Page 1: Table Of Contents

    Revision A: • MUZ-GX09/12/15NL - MUZ-GX09/12/15NLHZ - and MUY-GX09/12/15NL - have been added. •12. DISASSEMBLY INSTRUCTIONS has been corrected. OBD951 is void. OUTDOOR UNIT No. OBD951 TECHNICAL & utilized REVISED EDITION-A SERVICE MANUAL R454B Models MUZ-GX09NL MUZ-GX09NLHZ MUY-GX09NL MUZ-GX12NL MUZ-GX12NLHZ MUY-GX12NL MUZ-GX15NL MUZ-GX15NLHZ...
  • Page 2 Use the specified 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

    TECHNICAL CHANGES MUZ-GX18NL - MUY-GX18NL - MUZ-GX24NL - MUY-GX24NL - MUZ-GX30NL - MUY-GX30NL - MUZ-GX36NL - MUY-GX36NL - MUZ-GX18NLHZ - MUZ-GX24NLHZ - 1. New model MUZ-GX09NL - MUY-GX09NL - MUZ-GX12NL - MUY-GX12NL - MUZ-GX15NL - MUY-GX15NL - MUZ-GX09NLHZ - MUZ-GX12NLHZ - MUZ-GX15NLHZ - 1.

  • Page 4: Servicing Precautions For Units Using Refrigerant R454B

    SERVICING PRECAUTIONS FOR UNITS USING REFRIGERANT R454B Servicing precautions for units using refrigerant R454B Refrigerant WARNING Safety Group This unit uses a flammable refrigerant. If refrigerant leaks and comes in contact with fire or heating part, it will create harmful gas and there is risk of fire. Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
  • Page 5 2. Additional refrigerant charge Additional refrigerant charge Refrigerant for the indoor units and the extended piping is not included in the outdoor unit when the unit is shipped from the factory. Therefore, charge each refrigerant piping system with additional refrigerant at the installation site. In addition, in order to carry out service, enter the size and length of each liquid pipe and additional refrigerant charge amounts in the spaces pro- vided on the “Refrigerant amount”...
  • Page 6 MSZ-GX18/24NL Hook Lead wire Refrigerant sensor Insert the bottom of the sensor case. Insulation Fig. 1 Fig. 2 Fig. 3 (1) Remove the panel. (2) Remove the insulation and take out the lead wire below the insulation. (Fig. 1) (3) Connect the lead wire to refrigerant sensor. (Fig. 2) (4) Insert the refrigerant sensor in the direction of the arrow and then fix it with the hook.
  • Page 7 4. Cautions for the unit using R454B refrigerant Basic work procedures are the same as those for conventional units using refrigerant R410A. However, pay careful attention to the following points. ■ Information on servicing 1. Checks to the area Prior to beginning work on systems containing FLAMMABLE REFRIGERANTS, safety checks are necessary to ensure that the risk of ignition is minimized.
  • Page 8 ■ Repairs to sealed components Sealed electrical components shall be replaced. ■ Repair to intrinsically safe components Intrinsically safe components must be replaced. ■ Cabling Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse environmental effects.
  • Page 9 ■ Decommissioning Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail. It is recommended good practice that all refrigerants are recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use of recovered refrigerant.

  • Page 10: Part Names And Functions

    PART NAMES AND FUNCTIONS MUZ-GX09NL MUZ-GX12NL MUZ-GX15NL MUY-GX09NL MUY-GX12NL MUY-GX15NL MUZ-GX09NLHZ MUZ-GX12NLHZ MUZ-GX15NLHZ Air inlet (back and side) Piping Air outlet Drain hose Drain outlet MUZ-GX18NL MUZ-GX24NL MUZ-GX30NL MUZ-GX36NL MUY-GX18NL MUY-GX24NL MUY-GX30NL MUY-GX36NL MUZ-GX18NLHZ MUZ-GX24NLHZ Air inlet (Back and side) Piping Air outlet Drain hose...

  • Page 11: Specification

    SPECIFICATION Outdoor unit model MUZ-GX09NL MUY-GX09NL MUZ-GX09NLHZ Cooling * Btu/h 9,000 (3,200 – 12,200) 9,000 (3,200 – 12,200) 9,000 (3,200 – 12,200) Capacity Rated (Minimum – Maximum) Heating 47 * Btu/h 10,900 (3,300 – 15,900) — 9,600 (3,300 – 15,900) Capacity Heating 17 * Btu/h...
  • Page 12 Outdoor unit model MUZ-GX12NL MUY-GX12NL MUZ-GX12NLHZ Cooling * Btu/h 12,000 (1,300 – 14,000) 12,000 (1,300 – 14,000) 12,000 (1,300 – 14,000) Capacity Rated (Minimum – Maximum) Heating 47 * Btu/h 14,400 (1,500 – 18,100) — 12,300 (3,300 – 19,100) Capacity Heating 17 * Btu/h 9,000 (12,000)
  • Page 13 Outdoor unit model MUZ-GX15NL MUY-GX15NL MUZ-GX15NLHZ Cooling * Btu/h 14,000 (2,800 – 18,200) 14,000 (2,800 – 18,200) 14,000 (2,800 – 18,200) Capacity Rated (Minimum – Maximum) Heating 47 * Btu/h 18,000 (4,300 – 21,000) — 14,000 (4,300 – 21,000) Capacity Heating 17 * Btu/h 11,400 (16,400)
  • Page 14 Outdoor unit model MUZ-GX18NL MUY-GX18NL MUZ-GX18NLHZ Cooling * Btu/h 18,000 (5,200 – 22,000) 18,000 (5,200 – 22,000) 18,000 (5,200 – 22,000) Capacity Rated (Minimum – Maximum) Heating 47 * Btu/h 21,600 (6,800 – 27,400) — 19,000 (6,800 – 27,400) Capacity Heating 17 * Btu/h 13,700 (18,200)
  • Page 15 Outdoor unit model MUZ-GX24NL MUY-GX24NL MUZ-GX24NLHZ Cooling * Btu/h 22,400 (7,400 – 27,000) 22,400 (7,400 – 27,000) 22,400 (7,400 – 27,000) Capacity Rated (Minimum – Maximum) Heating 47 * Btu/h 27,600 (6,800 – 32,000) — 21,200 (6,800 – 32,000) Capacity Heating 17 * Btu/h 19,200 (24,600)
  • Page 16 Outdoor unit model MUZ-GX30NL MUY-GX30NL MUZ-GX36NL MUY-GX36NL 30,600 30,600 33,800 33,800 Cooling * Btu/h (10,300 – 30,600) (10,300 – 30,600) (10,300 – 33,800) (10,300 – 33,800) Capacity Rated (Minimum – Maximum) 32,600 35,200 Heating 47 * Btu/h — — (9,800 – 34,000) (9,800 –...

  • Page 17: Operation

    Test condition *3, *4 AHRI Indoor air condition (°F) Outdoor air condition (°F) Mode Test 210/240 Dry bulb Wet bulb Dry bulb Wet bulb “A-Full” Cooling Steady State (75) at rated compressor speed “B-Full” Cooling Steady State (65) at rated compressor speed SEER “B-Low”...

  • Page 18: Outlines And Dimensions

    MUZ-GX09NL-U1 OUTLINES AND DIMENSIONS MUZ-GX12NL-U1 MUZ-GX15NL-U1 MUZ-GX09NLHZ-U1 MUZ-GX09NL MUZ-GX12NL MUZ-GX15NL MUZ-GX12NLHZ-U1 MUY-GX09NL MUY-GX12NL MUY-GX15NL MUZ-GX15NLHZ-U1 MUZ-GX09NLHZ MUZ-GX12NLHZ MUZ-GX15NLHZ MUY-GX09NL-U1 Unit: inch MUY-GX12NL-U1 MUY-GX15NL-U1 REQUIRED SPACE 4 in. (100 mm) or more when front and sides of the unit are clear...
  • Page 19 MUZ-GX18NL MUZ-GX24NL MUZ-GX30NL MUZ-GX36NL MUY-GX18NL MUY-GX24NL MUY-GX30NL MUY-GX36NL MUZ-GX18NLHZ MUZ-GX24NLHZ Unit: inch REQUIRED SPACE 4 in OR MORE. 14 in OR MORE. 16-7/16 AIR IN ↓ DRAIN HOLE ø1-21/32 → 20 in OR MORE. AIR IN OPEN TWO SIDES OF RIGHT, 4 in OR MORE.

  • Page 20: Wiring Diagram

    WIRING DIAGRAM MUZ-GX09NL MUZ-GX12NL MUZ-GX15NL OBD951A...
  • Page 21 MUZ-GX09NLHZ MUZ-GX12NLHZ MUZ-GX15NLHZ OBD951A...
  • Page 22 MUY-GX09NL MUY-GX12NL MUY-GX15NL OBD951A...
  • Page 23 MUZ-GX18NL MUZ-GX24NL MUZ-GX30NL MUZ-GX36NL MUZ-GX18NLHZ MUZ-GX24NLHZ OBD951A...
  • Page 24 MUY-GX18NL MUY-GX24NL MUY-GX30NL MUY-GX36NL OBD951A...

  • Page 25: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM Unit: Inch (mm) Unit: Inch (mm) MUZ-GX09NL MUZ-GX12NL MUZ-GX15NL MUY-GX09NL MUY-GX12NL MUY-GX15NL MUZ-GX09NLHZ MUZ-GX12NLHZ MUZ-GX15NLHZ Refrigerant pipe ø3/8 (ø9.52) (GX09/12) ø1/2 (ø12.7) (GX15) 4-way valve (with heat insulator) Muffler Outdoor heat exchanger Stop valve temperature (with service port) Outdoor Muffler thermistor...
  • Page 26 MUZ-GX18NL MUZ-GX24NL MUZ-GX30NL MUZ-GX36NL Unit: Inch (mm) MUY-GX18NL MUY-GX24NL MUY-GX30NL MUY-GX36NL MUZ-GX18NLHZ MUZ-GX24NLHZ Service port (high pressure) Refrigerant pipe ø1/2 (ø12.7) (GX18) ø5/8 (ø15.88) (GX24/30/36) (with heat insulator) 4-way valve Muffler Stop Muffler valve Outdoor Discharge Flared connection heat Ambient temperature exchanger temperature...
  • Page 27 MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE Refrigerant piping: ft. Piping size O.D: in. Model Max. Length Max. Height difference Liquid MUZ-GX09NL MUZ-GX09NLHZ MUY-GX09NL MUZ-GX12NL MUZ-GX12NLHZ MUY-GX12NL MUZ-GX15NL MUZ-GX15NLHZ MUY-GX15NL MUZ-GX18NL MUZ-GX18NLHZ MUY-GX18NL MUZ-GX24NL MUZ-GX24NLHZ MUY-GX24NL MUZ-GX30NL MUY-GX30NL MUZ-GX36NL MUY-GX36NL Indoor unit...

  • Page 28: Data

    DATA MUZ-GX09NL MUZ-GX12NL MUZ-GX15NL MUZ-GX18NL MUZ-GX24NL MUZ-GX30NL MUZ-GX36NL MUY-GX09NL MUY-GX12NL MUY-GX15NL MUY-GX18NL MUY-GX24NL MUY-GX30NL MUY-GX36NL MUZ-GX09NLHZ MUZ-GX12NLHZ MUZ-GX15NLHZ MUZ-GX18NLHZ MUZ-GX24NLHZ 8-1. PERFORMANCE DATA 1) COOLING CAPACITY Indoor air Outdoor intake air DB temperature (˚F) Model IWB (˚F) 11.0 0.77 0.52 10.3 0.77 0.57...
  • Page 29 Indoor air Outdoor intake air DB temperature (˚F) Model IWB (˚F) 0.77 0.65 0.77 0.67 MUZ-GX09NL MUZ-GX09NLHZ 0.90 0.62 0.90 0.65 MUY-GX09NL 1.03 0.60 1.03 0.62 12.0 0.64 0.99 11.0 0.64 1.04 MUZ-GX12NL 11.2 0.77 0.95 10.3 0.77 1.00 MUY-GX12NL 10.3 0.90 0.92...
  • Page 30 2) COOLING CAPACITY CORRECTIONS Refrigerant piping length (one way: ft.) Model 25 (std.) MUZ-GX09NL MUZ-GX09NLHZ 0.993 0.981 — MUY-GX09NL MUZ-GX12NL MUZ-GX12NLHZ 0.987 0.967 — MUY-GX12NL MUZ-GX15NL MUZ-GX15NLHZ 0.996 0.988 — MUY-GX15NL MUZ-GX18NL MUZ-GX18NLHZ 0.994 0.983 0.969 MUY-GX18NL MUZ-GX24NL MUZ-GX24NLHZ 0.996 0.990 0.982 MUY-GX24NL...
  • Page 31 4) HEATING CAPACITY Indoor air Outdoor intake air WB temperature (˚F) Model IDB (˚F) 0.42 0.54 0.63 0.70 10.6 0.74 11.0 0.75 12.4 0.78 MUZ-GX09NL 0.41 0.52 0.62 0.68 10.9 0.72 11.2 0.73 12.7 0.76 0.39 0.50 0.59 10.0 0.67 11.2 0.70 11.6...

  • Page 32: Performance Curve

    How to operate with fixed operational frequency of the compressor. 1. Press the emergency operation switch on the front of the indoor unit, and select either EMERGENCY COOL mode or EMERGENCY HEAT mode before starting to operate the air conditioner. 2.
  • Page 33 MUZ-GX18NL MUZ-GX18NLHZ MUZ-GX24NL MUZ-GX24NLHZ MUY-GX18NL MUY-GX24NL SHF at rating condition = 0.79 SHF at rating condition = 0.78 = 573 CFM = 688 CFM Airflow Airflow Outdoor intake air DB temperature (°F) Outdoor intake air DB temperature (°F) MUZ-GX30NL MUZ-GX36NL MUY-GX30NL MUY-GX36NL SHF at rating condition = 0.70...
  • Page 34 Heating Heating capacity (at Rated frequency) Outdoor intake air WB temperature (°F) MUZ-GX09NL MUZ-GX09NLHZ Airflow = 448 CFM Airflow = 448 CFM Outdoor intake air WB temperature (°F) Outdoor intake air WB temperature (°F) MUZ-GX12NL MUZ-GX12NLHZ Airflow = 448 CFM Airflow = 448 CFM Outdoor intake air WB temperature (°F)
  • Page 35 MUZ-GX18NL MUZ-GX18NLHZ = 622 CFM = 622 CFM Airflow Airflow Outdoor intake air WB temperature (°F) Outdoor intake air WB temperature (°F) MUZ-GX24NL MUZ-GX24NLHZ = 765 CFM Airflow = 765 CFM Airflow Outdoor intake air WB temperature (°F) Outdoor intake air WB temperature (°F) MUZ-GX30NL MUZ-GX36NL Airflow...
  • Page 36 8-3. CONDENSING PRESSURE Cooling Data are based on the condition of indoor humidity 50 %. Air flow should be set to High speed. MUZ-GX09NL MUY-GX09NL MUZ-GX09NLHZ (psig) (psig) 95 100 105 110 115 95 100 105 110 115 (°F) (°F) Outdoor ambient temperature Outdoor ambient temperature MUZ-GX12NL MUY-GX12NL...
  • Page 37 MUZ-GX15NL MUY-GX15NL MUZ-GX15NLHZ (psig) (psig) 95 100 105 110 115 (°F) 95 100 105 110 115 (°F) Outdoor ambient temperature Outdoor ambient temperature MUZ-GX18NL MUY-GX18NL MUZ-GX18NLHZ (psig) (psig) (°F) (°F) 95 100 105 110 115 95 100 105 110 115 Outdoor ambient temperature Outdoor ambient temperature MUZ-GX24NL MUY-GX24NL MUZ-GX24NLHZ...
  • Page 38 MUZ-GX36NL MUY-GX36NL (psig) (psig) (°F) (°F) 95 100 105 110 115 95 100 105 110 115 Outdoor ambient temperature Outdoor ambient temperature Heating Data are based on the condition of outdoor humidity 75%. Air flow should be set to High speed. Data are for heating operation without any frost.
  • Page 39 MUZ-GX12NL (psig) (psig) (°F) (°F) Outdoor ambient temperature Outdoor ambient temperature MUZ-GX12NLHZ (psig) (psig) (°F) (°F) Outdoor ambient temperature Outdoor ambient temperature MUZ-GX15NL (psig) (psig) (°F) (°F) Outdoor ambient temperature Outdoor ambient temperature MUZ-GX15NLHZ (psig) (psig) (°F) (°F) Outdoor ambient temperature Outdoor ambient temperature OBD951A...
  • Page 40 MUZ-GX18NL (psig) (psig) (°F) (°F) Outdoor ambient temperature Outdoor ambient temperature MUZ-GX18NLHZ (psig) (psig) (°F) (°F) Outdoor ambient temperature Outdoor ambient temperature MUZ-GX24NL (psig) (psig) (°F) (°F) Outdoor ambient temperature Outdoor ambient temperature MUZ-GX24NLHZ (psig) (psig) (°F) (°F) Outdoor ambient temperature Outdoor ambient temperature OBD951A...
  • Page 41 MUZ-GX30NL (psig) (psig) (°F) (°F) Outdoor ambient temperature Outdoor ambient temperature MUZ-GX36NL (psig) (psig) (°F) (°F) Outdoor ambient temperature Outdoor ambient temperature OBD951A...

  • Page 42: Standard Operation Data

    8-4. STANDARD OPERATION DATA Model MSZ-GX09NL MSZ-GX09NL MSY-GX09NL Item Unit COOL HEAT COOL HEAT COOL Capacity Btu/h 9,000 10,900 9,000 9,600 9,000 — — — Input 0.585 0.72 0.585 0.58 0.585 Rated frequency Indoor unit MSZ-GX09NL MSZ-GX09NL MSY-GX09NL Power supply V, phase, Hz 208/230, 1, 60 208/230, 1, 60...
  • Page 43 Model MSZ-GX12NL MSZ-GX12NL MSY-GX12NL Item Unit COOL HEAT COOL HEAT COOL Capacity Btu/h 12,000 14,400 12,000 12,300 12,000 — 0.77 — 0.78 — 0.77 Input 0.92 Rated frequency 47.5 Indoor unit MSZ-GX12NL MSZ-GX12NL MSY-GX12NL Power supply V, phase, Hz 208/230, 1, 60 208/230, 1, 60 208/230, 1, 60 Input...
  • Page 44 Model MSZ-GX15NL MSZ-GX15NL MSY-GX15NL Item Unit COOL HEAT COOL HEAT COOL Capacity Btu/h 14,000 18,000 14,000 14,000 — 0.82 — 0.82 — 0.82 Input 1.075 1.075 1.075 Rated frequency 52.5 Indoor unit MSZ-GX15NL MSZ-GX15NL MSY-GX15NL Power supply V, phase, Hz 208/230, 1, 60 208/230, 1, 60 208/230, 1, 60...
  • Page 45 Model MSZ-GX18NL MSZ-GX18NL MSY-GX18NL Item Unit COOL HEAT COOL HEAT COOL Capacity Btu/h 18,000 21,600 18,000 19,000 18,000 — 0.79 — 0.79 — 0.79 Input 1.28 1.68 1.28 1.34 1.28 Rated frequency 65.5 57.5 Indoor unit MSZ-GX18NL MSZ-GX18NL MSY-GX18NL Power supply V, phase, Hz 208/230, 1, 60 208/230, 1, 60...
  • Page 46 Model MSZ-GX24NL MSZ-GX24NL MSY-GX24NL Item Unit COOL HEAT COOL HEAT COOL Capacity Btu/h 22,400 27,600 22,400 21,200 22,400 — 0.78 — 0.78 — 0.78 Input 1.72 2.34 1.72 1.72 Rated frequency Indoor unit MSZ-GX24NL MSZ-GX24NL MSY-GX24NL Power supply V, phase, Hz 208/230, 1, 60 208/230, 1, 60 208/230, 1, 60...
  • Page 47 Model MSZ-GX30NL MSY-GX30NL MSZ-GX36NL MSY-GX36NL Item Unit COOL HEAT COOL COOL HEAT COOL Capacity Btu/h 30,600 32,600 30,600 33,800 35,200 33,800 — — 0.68 — 0.68 Input 3.38 3.36 3.38 4.02 3.84 4.02 Rated frequency 101.5 109.5 Indoor unit MSZ-GX30NL MSY-GX30NL MSZ-GX36NL MSY-GX36NL...
  • Page 48 8-5. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY MUZ-GX09NL MUY-GX09NL MUZ-GX09NL MUY-GX09NL MUZ-GX09NL MUZ-GX09NL Correction of Cooling capacity Correction of Cooling total input Correction of Heating capacity Correction of Heating total input (Hz) (Hz) (Hz) (Hz) The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor...
  • Page 49 MUZ-GX15NL MUY-GX15NL MUZ-GX15NL MUY-GX15NL MUZ-GX15NL MUZ-GX15NL Correction of Cooling capacity Correction of Cooling total input Correction of Heating capacity Correction of Heating total input (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-GX15NLHZ MUZ-GX15NLHZ...
  • Page 50 MUZ-GX18NL MUY-GX18NL MUZ-GX18NL Correction of Cooling capacity Correction of Cooling total input Correction of Heating capacity Correction of Heating total input (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-GX18NLHZ Correction of Cooling capacity...
  • Page 51 MUZ-GX30NL MUY-GX30NL MUZ-GX30NL Correction of Cooling capacity Correction of Cooling total input Correction of Heating capacity Correction of Heating total input (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-GX36NL MUY-GX36NL MUZ-GX36NL...

  • Page 52: Actuator Control

    ACTUATOR CONTROL MUZ-GX09NL MUZ-GX12NL MUZ-GX15NL MUZ-GX18NL MUZ-GX24NL MUZ-GX30NL MUZ-GX36NL MUY-GX09NL MUY-GX12NL MUY-GX15NL MUY-GX18NL MUY-GX24NL MUY-GX30NL MUY-GX36NL MUZ-GX09NLHZ MUZ-GX12NLHZ MUZ-GX15NLHZ MUZ-GX18NLHZ MUZ-GX24NLHZ 9-1. 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 53: Service Functions

    SERVICE FUNCTIONS MUZ-GX09NL MUZ-GX12NL MUZ-GX15NL MUZ-GX18NL MUZ-GX24NL MUZ-GX30NL MUZ-GX36NL MUY-GX09NL MUY-GX12NL MUY-GX15NL MUY-GX18NL MUY-GX24NL MUY-GX30NL MUY-GX36NL MUZ-GX09NLHZ MUZ-GX12NLHZ MUZ-GX15NLHZ MUZ-GX18NLHZ MUZ-GX24NLHZ 10-1. CHANGE IN DEFROST SETTING 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 11-6.1.). Defrost finish temperature Jumper MUZ-GX09/12/15NL...

  • Page 54: Troubleshooting

    TROUBLESHOOTING MUZ-GX09NL MUZ-GX12NL MUZ-GX15NL MUZ-GX18NL MUZ-GX24NL MUZ-GX30NL MUZ-GX36NL MUY-GX09NL MUY-GX12NL MUY-GX15NL MUY-GX18NL MUY-GX24NL MUY-GX30NL MUY-GX36NL MUZ-GX09NLHZ MUZ-GX12NLHZ MUZ-GX15NLHZ MUZ-GX18NLHZ MUZ-GX24NLHZ 11-1. 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.
  • Page 55 11-2. FAILURE MODE RECALL FUNCTION AND ERROR CODE DISPLAY MODE Outline of the function This air conditioner can memorize the failure which has occurred last time. Even though LED indication listed on the troubleshooting check table (11-3.) disappears, the memorized failure can be recalled.
  • Page 56 A (From previous page) Press OFF/ON (stop/operate) button of the remote controller with the remote controller headed towards the indoor unit. *1. The indoor unit is normal, but the outdoor unit might be abnormal. Does the upper OPERATION INDICATOR lamp on There are some abnormalities that cannot be recalled with this way.
  • Page 57 2. Flow chart of the outdoor unit failure mode recall function Operational procedure The outdoor unit might be abnormal. Check if the outdoor unit is abnormal according to the following procedures. Make sure that the remote controller is set to the failure mode recall function. Get close to the front of the indoor unit.
  • Page 58 A (From previous page) Releasing the failure mode recall function Release the failure mode recall function by the following procedures. Turn OFF the power supply and turn it ON again. Press RESET button of the remote controller. Repair the failure parts. Deleting the memorized abnormal condition After repairing the unit, recall the failure mode again according to “Setting up the failure mode recall function”...
  • Page 59 3. Flow chart of error code display mode This explains how customers can check the error code on their own. This is included in OPERATING INSTRUCTIONS. Operational procedure The remote controller is powered OFF. Get close to the front of the indoor unit. Point the remote controller at the receiving section of the indoor unit, and keep pressing CHECK with a fine-tipped object until the beeps.
  • Page 60 4. Table of outdoor unit failure mode recall function OPERATION Indoor/outdoor Outdoor unit Error INDICATOR Abnormal point LED indication unit failure Condition Remedy failure mode lamp code (Failure mode/protection) (Outdoor P.C. board) mode recall recall function (Indoor unit) function Not blink None (Normal) —...
  • Page 61 NOTE: Blinking patterns of this mode differ from the ones of TROUBLESHOOTING CHECK TABLE (11-3.). OPERATION Indoor/outdoor Outdoor unit Error INDICATOR Abnormal point LED indication unit failure Condition Remedy failure mode lamp code (Failure mode/protection) (Outdoor P.C. board) mode recall recall function (Indoor unit) function...
  • Page 62 11-3. TROUBLESHOOTING CHECK TABLE Abnormal point/ Symptom LED indication Condition Remedy Condition Outdoor unit 1-time blink every Outdoor power Overcurrent protection cut-out operates 3 consecutive times • Reconnect connector of does not 2.5 seconds system within 1 minute after the compressor gets started. compressor.
  • Page 63 Abnormal point/ Symptom LED indication Condition Remedy Condition Outdoor unit 1-time blink Deceleration of the Current from power outlet is nearing breaker capacity. The unit is normal, but check the operates. 2.5 seconds OFF operational following. frequency of the • Check if indoor filters are compressor by the clogged.
  • Page 64 11-4. TROUBLESHOOTING CRITERION OF MAIN PARTS MUZ-GX09NL MUZ-GX12NL MUZ-GX15NL MUZ-GX18NL MUZ-GX24NL MUZ-GX30NL MUZ-GX36NL MUY-GX09NL MUY-GX12NL MUY-GX15NL MUY-GX18NL MUY-GX24NL MUY-GX30NL MUY-GX36NL MUZ-GX09NLHZ MUZ-GX12NLHZ MUZ-GX15NLHZ MUZ-GX18NLHZ MUZ-GX24NLHZ Part name Check method and criterion Figure Defrost thermistor Measure the resistance with a multimeter. (RT61) Refer to 11-6.

  • Page 65: Troubleshooting Flow

    11-5. TROUBLESHOOTING FLOW A How to check inverter/compressor Disconnect the connector between the compressor and the power module (IC700). Check the voltage between terminals. See 11-5. “Check of open phase”. Are the voltages balanced? Replace the inverter P.C. board. Check the compressor. See 11-5.
  • Page 66 D Check of compressor winding ● Disconnect the connector between the compressor and the power module (IC700), and measure the resistance between the compressor terminals. <<Measurement point>> At 3 points *Measure the resistance between the lead wires at 3 points. BLK-WHT BLK-RED WHT-RED...
  • Page 67 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. Is the resistance of thermistor normal? When RT64 is abnormal, replace the (Refer to 11-6.1.) inverter P.C.
  • Page 68 H Check of R.V. coil MUZ-GX18/24/30/36 * First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to 11-4. * In case CN602 is disconnected or R.V. coil is open, voltage is generated between the terminal pins of the connector although no signal is being transmitted to R.V.
  • Page 69 I Check of outdoor fan motor Disconnect the connectors CN931 and CN932 from the inverter P.C. board. Check the connection between the connector CN931 and CN932. Is the resistance between each termi- nal of outdoor fan motor normal? (Refer to 11-4.) Disconnect CN932 from the inverter P.C.
  • Page 70 J Check of power supply Disconnect the connector between the compressor and the power module (IC700). Rectify indoor/outdoor Turn ON power supply and press the connecting wire. emergency operation switch. Does the upper lamp of the Is there voltage 208/230 V AC Replace the indoor OPERATION INDICATOR lamp between the indoor terminal...
  • Page 71 K Check of LEV (Expansion valve) Turn ON the power supply. <Preparation of the remote controller> E.g.: MSZ type While pressing both Operation select button and TEMP button on the remote controller at the same time, press RESET button. First, release RESET button. Hold down the other 2 buttons for another 3 seconds.
  • Page 72 L Check of inverter P.C. board Check the outdoor fan motor. (Refer to 11-5. .) Is the fuse (F901) blown on the inverter P.C. board? Check the connection of the connectors (CN931, CN932) of the outdoor fan motor. If the connection is poor, make it correct. Operate the outdoor unit by starting EMERGENCY OPERATION.
  • Page 73 M How to check miswiring and serial signal error Turn ON the power supply. Is there rated voltage in the power supply? Check the power supply. Is there rated voltage between outdoor terminal block S1 and S2? Check the wiring. Press the emergency operation switch once.
  • Page 74 N Check of defrost heater MUZ-GX18NLHZ MUZ-GX24NLHZ Check the following points before checking electric continuity. 1. Does the resistance of ambient temperature thermistor have the characteristics? Refer to 11-6.1. 2. Is the resistance of defrost heater normal? Refer to 11-4. 3.
  • Page 75 P Check of compressor protector Disconnect the connector of compressor protector in the inverter P.C. board, and check the conduction of compressor protector. Is the discharge temperature Operate the unit and Is the compressor thermistor normal? Refer to 11-5. re-confirm if the protector conductive? “Check of outdoor thermistors”.
  • Page 76 Q 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. (3m), the indoor unit, and/or the antennas and the out- or is the distance between the antennas door unit.
  • Page 77 11-6. TEST POINT DIAGRAM AND VOLTAGE 1. Inverter P.C. board MUZ-GX09NL MUZ-GX12NL MUZ-GX15NL MUY-GX09NL MUY-GX12NL MUY-GX15NL MUZ-GX09NLHZ MUZ-GX12NLHZ MUZ-GX15NLHZ Smoothing Smoothing Heater R.V.coil Back side of unit capacitor capacitor (CN722) (CN721) DB61 (C61) (C62) 208/230 V AC 208/230 V AC 260 –...
  • Page 78 1. Inverter P.C. board MUZ-GX18NL MUZ-GX24NL MUZ-GX30NL MUZ-GX36NL MUY-GX18NL MUY-GX24NL MUY-GX30NL MUY-GX36NL MUZ-GX18NLHZ MUZ-GX24NLHZ Smoothing Smoothing Smoothing Output to drive Heater (CN601) Fuse (F601) Back side of unit Capacitor Capacitor Capacitor Fuse (F880) outdoor fan motor 230 V AC T3.15AL250V T3.15AL250V (MUZ only) (MUZ only)
  • Page 79 2. Fuse P.C. board MUZ-GX18NL MUZ-GX24NL MUZ-GX30NL MUZ-GX36NL MUY-GX18NL MUY-GX24NL MUY-GX30NL MUY-GX36NL MUZ-GX18NLHZ MUZ-GX24NLHZ FUSE (F66) FUSE (F65) T6.3AL250V T6.3AL250V OBD951A...

  • Page 80: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS <Detaching method of the terminal with locking mechanism> The terminal which has the locking mechanism can be detached as shown below. There are 2 types 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 81 OPERATING PROCEDURE PHOTOS/FIGURES Screws of Photo 4 Screws of the Photo 5 Screw of the conduit cover the back panel conduit plate 2. Removing the inverter assembly, inverter P.C. Photo 6 board Screw of the heat sink (1) Remove the top panel, cabinet and service panel. support and the separator (Refer to section 1.) (2) Disconnect the lead wire to the reactor and the following...
  • Page 82 OPERATING PROCEDURE PHOTOS/FIGURES * Connection procedure when attaching the inverter Photo 9 P.C. board (Photo 9) MUZ-GX09NL MUZ-GX09NLHZ MUY-GX09NL 1. Connect the lead wires of the fan motor (Power) and MUZ-GX12NL MUY-GX12NL ambient temperature thermistor (NLHZ only) to the con- Lead wires of the fan motor (Power) Lead wires of the nector on the inverter P.C.
  • Page 83 OPERATING PROCEDURE PHOTOS/FIGURES 3. Removing R.V. coil Photo 10 (1) Remove the cabinet and panels. (Refer to section 1.) (2) Disconnect the following connectors: <Inverter P.C. board> CN721 (R.V. coil) Screw of (3) Remove the R.V. coil. the R.V. coil Discharge temperature thermistor...
  • Page 84 OPERATING PROCEDURE PHOTOS/FIGURES 5. Removing outdoor fan motor Photo 12 Screws of the outdoor fan motor (1) Remove the top panel, cabinet and service panel. (Refer to section 1.) (2) Disconnect the following connectors: <Inverter P.C. board> CN931, CN932 (Fan motor) (3) Remove the propeller fan nut.
  • Page 85 12-2. MUZ-GX18NL MUZ-GX24NL MUZ-GX30NL MUZ-GX36NL MUY-GX18NL MUY-GX24NL MUY-GX30NL MUY-GX36NL MUZ-GX18NLHZ MUZ-GX24NLHZ : Indicates the visible parts in the photos/figures. : Indicates the invisible parts in the photos/figures. NOTE: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the cabinet Photo 2 (1) Remove the screws of the service panel.
  • Page 86 OPERATING PROCEDURE PHOTOS/FIGURES Photo 5 Photo 6 Screws of the conduit cover Screw of the conduit plate 2. Removing the inverter assembly, inverter P.C. Photo 7 board and fuse P.C. board 2-1. Removing the inverter assembly and inverter P.C. board (1) Remove the top panel, cabinet and service panel.
  • Page 87 OPERATING PROCEDURE PHOTOS/FIGURES Photo 11 * Connection procedure when attaching the inverter P.C. board (Photo 8, 9, 10, 11, 12) Hook of the lead wires of the Hook of the lead 1. Attach the heat sink support to the P.C. board support. P.C.
  • Page 88 OPERATING PROCEDURE PHOTOS/FIGURES 2-2. Removing the fuse P.C. board Photo 13 Support Fuse P.C. board (1) Remove the top panel, cabinet and service panel. (Refer to section 1.) (2) Disconnect the lead wire to the reactor and the inverter P.C. board connectors. (Refer to section 2-1. (2)) (3) Remove the compressor connector (CN61).
  • Page 89 OPERATING PROCEDURE PHOTOS/FIGURES Photo 15 4. Removing outdoor fan motor (1) Remove the top panel, cabinet and service panel. Propeller fan nut (Refer to section 1.) (2) Disconnect the following connectors: <Inverter P.C. board> Propeller fan CN931, CN932 (Fan motor) (3) Remove the propeller fan nut.
  • Page 90 OPERATING PROCEDURE PHOTOS/FIGURES 6. Removing the compressor and 4-way valve Photo 17 (1) Remove the cabinet and panels. (Refer to section 1.) (2) Remove the inverter assembly. (Refer to section 2.) (3) Remove the screws fixing the reactor. (4) Remove the reactor. (5) Remove the soundproof felt.

  • Page 91: Position Of The Center Of Gravity

    POSITION OF THE CENTER OF GRAVITY Unit: inch (mm) Model name MUZ-GX09NL MUY-GX09NL MUZ-GX12NL MUY-GX12NL MUZ-GX15NL MUY-GX15NL 11-1/16 5-9/16 9-1/2 31-1/2 11-1/4 21-5/8 MUZ-GX09NLHZ (280) (140) (240) (800) (285) (550) MUZ-GX12NLHZ MUZ-GX15NLHZ MUZ-GX18NL MUY-GX18NL MUZ-GX24NL MUY-GX24NL MUZ-GX30NL MUY-GX30NL 5-29/32 15-11/32 33-1/16 34-5/8 MUZ-GX36NL...

  • Page 92: Noise Criterion Curves

    NOISE CRITERION CURVES MUZ-GX09NL MUZ-GX09NLHZ NOTCH SPL(dB(A)) LINE NOTCH SPL(dB(A)) LINE MUY-GX09NL COOLING COOLING HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20 CONTINUOUS CONTINUOUS NOISE NOISE 1000...
  • Page 93 MUZ-GX15NL MUZ-GX15NLHZ NOTCH SPL(dB(A)) LINE NOTCH SPL(dB(A)) LINE MUY-GX15NL COOLING COOLING HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20 CONTINUOUS CONTINUOUS NOISE NOISE 1000 2000 4000 8000...
  • Page 94 MUZ-GX24NL MUZ-GX24NLHZ NOTCH SPL(dB(A)) LINE NOTCH SPL(dB(A)) LINE MUY-GX24NL COOLING COOLING HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20 CONTINUOUS CONTINUOUS NOISE NOISE 1000 2000 4000 8000...

  • Page 95: Max. Heating Capacity In Low Ambient Temperature

    MAX. HEATING CAPACITY IN LOW AMBIENT TEMPERATURE MUZ-GX09NL 120% 100% Outdoor Temperature Degrees (°F) HEATING CAPACITY Outdoor Temperature Degrees (°F) -5.0 14.0 23.0 32.0 41.0 50.0 69.8 75.0 % Heating Capacity 90% 100% 100% 100% 100% 100% 100% 100% MUZ-GX09NLHZ 120% 100% Outdoor Temperature Degrees (°F)
  • Page 96 MUZ-GX12NL 120% 100% Outdoor Temperature Degrees (°F) HEATING CAPACITY Outdoor Temperature Degrees (°F) -5.0 14.0 23.0 32.0 41.0 50.0 69.8 75.0 % Heating Capacity 94% 100% 100% 100% 100% 100% MUZ-GX12NLHZ 120% 100% Outdoor Temperature Degrees (°F) HEATING CAPACITY Outdoor Temperature Degrees (°F) -22.0 -13.0 -5.0...
  • Page 97 MUZ-GX15NL 120% 100% Outdoor Temperature Degrees (°F) HEATING CAPACITY Outdoor Temperature Degrees (°F) -5.0 14.0 23.0 32.0 41.0 50.0 69.8 75.0 % Heating Capacity 94% 100% 100% 100% 100% MUZ-GX15NLHZ 120% 100% Outdoor Temperature Degrees (°F) HEATING CAPACITY Outdoor Temperature Degrees (°F) -22.0 -13.0 -5.0...
  • Page 98 MUZ-GX18NL 120% 100% Outdoor Temperature Degrees (°F) HEATING CAPACITY Outdoor Temperature Degrees (°F) -5.0 14.0 23.0 32.0 41.0 50.0 69.8 75.0 % Heating Capacity 97% 100% 100% 100% 100% 100% 100% MUZ-GX18NLHZ 120% 100% Outdoor Temperature Degrees (°F) HEATING CAPACITY Outdoor Temperature Degrees (°F) -22.0 -13.0...
  • Page 99 MUZ-GX24NL 120% 100% Outdoor Temperature Degrees (°F) HEATING CAPACITY Outdoor Temperature Degrees (°F) -5.0 14.0 23.0 32.0 41.0 50.0 69.8 75.0 % Heating Capacity 93% 100% 100% 100% 100% 100% MUZ-GX24NLHZ 120% 100% Outdoor Temperature Degrees (°F) HEATING CAPACITY Outdoor Temperature Degrees (°F) -22.0 -13.0 -5.0...
  • Page 100 MUZ-GX30NL 120% 100% Outdoor Temperature Degrees (°F) HEATING CAPACITY Outdoor Temperature Degrees (°F) -5.0 14.0 23.0 32.0 41.0 50.0 69.8 75.0 % Heating Capacity 93% 100% 100% 100% 100% MUZ-GX36NL 120% 100% Outdoor Temperature Degrees (°F) HEATING CAPACITY Outdoor Temperature Degrees (°F) -5.0 14.0 23.0...

  • Page 101: Performance Chart

    PERFORMANCE CHART 16-1. INVERTER COOLING CAPACITY MUZ-GX09NL MUY-GX09NL CAPACITY (Btu/h): 9000 INPUT (W): 585 SHF: 0.90 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. P.C. 10575 7614 0.72 10125 7290 0.72 9720 6998 0.72 9360 6739 0.72 11025 6615 0.60...
  • Page 102 MUZ-GX09NL MUY-GX09NL CAPACITY (Btu/h): 9000 INPUT (W): 585 SHF: 0.90 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. 8820 6350 0.72 8100 5832 0.72 7470 5378 0.72 9270 5562 0.60 8640 5184 0.60 8010 4806 0.60 8820 6703 0.76...
  • Page 103 MUZ-GX09NLHZ CAPACITY (Btu/h): 9000 INPUT (W): 585 SHF: 0.90 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. P.C. 10575 7614 0.72 10125 7290 0.72 9720 6998 0.72 9360 6739 0.72 11025 6615 0.60 10575 6345 0.60 10260 6156 0.60 9900...
  • Page 104 MUZ-GX09NLHZ CAPACITY (Btu/h): 9000 INPUT (W): 585 SHF: 0.90 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. 8820 6350 0.72 8100 5832 0.72 7470 5378 0.72 9270 5562 0.60 8640 5184 0.60 8010 4806 0.60 8820 6703 0.76 8100...
  • Page 105 MUZ-GX12NL MUY-GX12NL CAPACITY (Btu/h): 12000 INPUT (W): 900 SHF: 0.77 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. P.C. 14100 8319 0.59 13500 7965 0.59 12960 7646 0.59 12480 7363 0.59 14700 6909 0.47 14100 6627 0.47 13680 6430 0.47...
  • Page 106 MUZ-GX12NL MUY-GX12NL CAPACITY (Btu/h): 12000 INPUT (W): 900 SHF: 0.77 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. 11760 6938 0.59 10800 6372 0.59 9960 5876 0.59 12360 5809 0.47 11520 5414 0.47 10680 5020 0.47 1017 11760 7409 0.63...
  • Page 107 MUZ-GX12NLHZ CAPACITY (Btu/h): 12000 INPUT (W): 900 SHF: 0.78 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. P.C. 14100 8460 0.60 13500 8100 0.60 12960 7776 0.60 12480 7488 0.60 14700 7056 0.48 14100 6768 0.48 13680 6566 0.48 13200 6336...
  • Page 108 MUZ-GX12NLHZ CAPACITY (Btu/h): 12000 INPUT (W): 900 SHF: 0.78 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. 11760 7056 0.60 10800 6480 0.60 9960 5976 0.60 12360 5933 0.48 11520 5530 0.48 10680 5126 0.48 1017 11760 7526 0.64 10800 6912...
  • Page 109 MUZ-GX15NL MUY-GX15NL CAPACITY (Btu/h): 14000 INPUT (W): 1075 SHF: 0.82 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. P.C. 16450 10528 0.64 15750 10080 0.64 15120 9677 0.64 14560 9318 0.64 17150 8918 0.52 16450 8554 0.52 15960 8299 0.52...
  • Page 110 MUZ-GX15NL MUY-GX15NL CAPACITY (Btu/h): 14000 INPUT (W): 1075 SHF: 0.82 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. 13720 8781 0.64 1054 12600 8064 0.64 1118 11620 7437 0.64 1161 14420 7498 0.52 1097 13440 6989 0.52 1150 12460 6479 0.52...
  • Page 111 MUZ-GX15NLHZ CAPACITY (Btu/h): 14000 INPUT (W): 1075 SHF: 0.82 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. P.C. 16450 10528 0.64 15750 10080 0.64 15120 9677 0.64 14560 9318 0.64 17150 8918 0.52 16450 8554 0.52 15960 8299 0.52 15400 8008...
  • Page 112 MUZ-GX15NLHZ CAPACITY (Btu/h): 14000 INPUT (W): 1075 SHF: 0.82 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. 13720 8781 0.64 1054 12600 8064 0.64 1118 11620 7437 0.64 1161 14420 7498 0.52 1097 13440 6989 0.52 1150 12460 6479 0.52 1215...
  • Page 113 MUZ-GX18NL MUY-GX18NL CAPACITY (Btu/h): 18000 INPUT (W): 1280 SHF: 0.79 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. P.C. 21150 12902 0.61 1024 20250 12353 0.61 1075 19440 11858 0.61 1126 18720 11419 0.61 1178 22050 10805 0.49 1075 21150 10364 0.49...
  • Page 114 MUZ-GX18NL MUY-GX18NL CAPACITY (Btu/h): 18000 INPUT (W): 1280 SHF: 0.79 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. 17640 10760 0.61 1254 16200 9882 0.61 1331 14940 9113 0.61 1382 18540 9085 0.49 1306 17280 8467 0.49 1370 16020 7850 0.49...
  • Page 115 MUZ-GX18NLHZ CAPACITY (Btu/h): 18000 INPUT (W): 1280 SHF: 0.79 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. P.C. 21150 12902 0.61 1024 20250 12353 0.61 1075 19440 11858 0.61 1126 18720 11419 0.61 1178 22050 10805 0.49 1075 21150 10364 0.49...
  • Page 116 MUZ-GX18NLHZ CAPACITY (Btu/h): 18000 INPUT (W): 1280 SHF: 0.79 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. 17640 10760 0.61 1254 16200 9882 0.61 1331 14940 9113 0.61 1382 18540 9085 0.49 1306 17280 8467 0.49 1370 16020 7850 0.49 1446...
  • Page 117 MUZ-GX24NL MUY-GX24NL CAPACITY (Btu/h): 22400 INPUT (W): 1720 SHF: 0.78 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. P.C. 26320 15792 0.60 1376 25200 15120 0.60 1445 24192 14515 0.60 1514 23296 13978 0.60 1582 27440 13171 0.48 1445 26320 12634 0.48...
  • Page 118 MUZ-GX24NL MUY-GX24NL CAPACITY (Btu/h): 22400 INPUT (W): 1720 SHF: 0.78 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. 21952 13171 0.60 1686 20160 12096 0.60 1789 18592 11155 0.60 1858 23072 11075 0.48 1754 21504 10322 0.48 1840 19936 9569 0.48...
  • Page 119 MUZ-GX24NLHZ CAPACITY (Btu/h): 22400 INPUT (W): 1720 SHF: 0.78 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. P.C. 26320 15792 0.60 1376 25200 15120 0.60 1445 24192 14515 0.60 1514 23296 13978 0.60 1582 27440 13171 0.48 1445 26320 12634 0.48...
  • Page 120 MUZ-GX24NLHZ CAPACITY (Btu/h): 22400 INPUT (W): 1720 SHF: 0.78 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. 21952 13171 0.60 1686 20160 12096 0.60 1789 18592 11155 0.60 1858 23072 11075 0.48 1754 21504 10322 0.48 1840 19936 9569 0.48 1944...
  • Page 121 MUZ-GX30NL MUY-GX30NL CAPACITY (Btu/h): 30600 INPUT (W): 3380 SHF: 0.7 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. P.C. 35955 18697 0.52 2704 34425 17901 0.52 2839 33048 17185 0.52 2974 31824 16548 0.52 3110 37485 14994 0.40 2839 35955 14382 0.40...
  • Page 122 MUZ-GX30NL MUY-GX30NL CAPACITY (Btu/h): 30600 INPUT (W): 3380 SHF: 0.7 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. 29988 15594 0.52 3312 27540 14321 0.52 3515 25398 13207 0.52 3650 31518 12607 0.40 3448 29376 11750 0.40 3617 27234 10894 0.40...
  • Page 123 MUZ-GX36NL MUY-GX36NL CAPACITY (Btu/h): 33800 INPUT (W): 4020 SHF: 0.68 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. P.C. 39715 19858 0.50 3216 38025 19013 0.50 3377 36504 18252 0.50 3538 35152 17576 0.50 3698 41405 15734 0.38 3377 39715 15092 0.38...
  • Page 124 MUZ-GX36NL MUY-GX36NL CAPACITY (Btu/h): 33800 INPUT (W): 4020 SHF: 0.68 OUTDOOR DB (°F) INDOOR INDOOR DB (°F) WB (°F) P.C. P.C. P.C. 33124 16562 0.50 3940 30420 15210 0.50 4181 28054 14027 0.50 4342 34814 13229 0.38 4100 32448 12330 0.38 4301 30082 11431 0.38...

  • Page 125: Capacity Correction Ratio Curve

    CAPACITY CORRECTION RATIO CURVE FOR PIPING LENGTH Correction ratio of capacity according to the length of piping (cooling) Indoor unit 06 class Indoor unit 100% 24 class Indoor unit 15 class Indoor unit 18 class Indoor unit 09 class Indoor unit 30 class Indoor unit 36 class...

  • Page 126: Part Load Capacity Chart

    PART LOAD CAPACITY CHART MUZ-GX09NL MUY-GX09NL Rated Q(Btu/h): 9000 1) COOLING Indoor W.B. 71°F / 21.7°C 67°F / 19.4°C 63°F / 17.2°C Outdoor D.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 46.1 Q(Btu/h) 11020 8280 8720 6440 4030 2900 10430 7700 8260 6100 3820 2740 9800 7020 7760 5730 3580 2580 1240 240 1170 230 1120...
  • Page 127 MUZ-GX09NL Rated Q(Btu/h): 10900 2) HEATING Indoor D.B. 78.8°F / 26.0°C 70°F / 21.1°C 59°F / 15.0°C Outdoor W.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 18.3 Q(Btu/h) 19860 13620 14890 9930 4960 1770 20670 14170 15500 10330 5160 1840 21480 14720 16110 10730 5360 1910 1980 820 1490 180 1880...
  • Page 128 MUZ-GX09NLHZ Rated Q(Btu/h): 9000 1) COOLING Indoor W.B. 71°F / 21.7°C 67°F / 19.4°C 63°F / 17.2°C Outdoor D.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 46.1 Q(Btu/h) 11020 8280 8720 6440 4030 2900 10430 7700 8260 6100 3820 2740 9800 7020 7760 5730 3580 2580 1240 240 1170 230 1120...
  • Page 129 MUZ-GX09NLHZ Rated Q(Btu/h): 9600 2) HEATING Indoor D.B. 78.8°F / 26.0°C 70°F / 21.1°C 59°F / 15.0°C Outdoor W.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 18.3 Q(Btu/h) 19860 11990 14890 9930 4960 1770 20670 12480 15500 10330 5160 1840 21480 12970 16110 10730 5360 1910 1990 660 1490 180 1890...
  • Page 130 MUZ-GX12NL MUY-GX12NL Rated Q(Btu/h): 12000 1) COOLING Indoor W.B. 71°F / 21.7°C 67°F / 19.4°C 63°F / 17.2°C Outdoor D.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 46.1 Q(Btu/h) 12640 11040 9480 6330 3160 1170 11970 10260 8980 5990 2990 1110 11250 9360 8440 5630 2810 1040 1760 1040 1300 100 1650 1000 1220 100 1570...
  • Page 131 MUZ-GX12NL Rated Q(Btu/h): 14400 2) HEATING 1100 Indoor D.B. 78.8°F / 26.0°C 70°F / 21.1°C 59°F / 15.0°C Outdoor W.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 18.3 Q(Btu/h) 22610 17990 17060 11310 5750 1850 23530 18720 17750 11770 5980 1930 24450 19450 18440 12230 6210 2010 2020 1250 1530 1010 170 1920 1190 1450 160 1820 1130 1370...
  • Page 132 MUZ-GX12NLHZ Rated Q(Btu/h): 12000 1) COOLING Indoor W.B. 71°F / 21.7°C 67°F / 19.4°C 63°F / 17.2°C Outdoor D.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 46.1 Q(Btu/h) 12640 11040 9390 5950 2700 1170 11970 10260 8890 5630 2560 1110 11250 9360 8360 5290 2410 1040 2260 1040 1680 1050 210 2130 1000 1590 1000 200 2040...
  • Page 133 MUZ-GX12NLHZ Rated Q(Btu/h): 12300 2) HEATING Indoor D.B. 78.8°F / 26.0°C 70°F / 21.1°C 59°F / 15.0°C Outdoor W.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 18.3 Q(Btu/h) 23860 15360 17900 11930 5970 3300 24830 15990 18630 12420 6210 3430 25800 16620 19360 12910 6450 3560 2840 1040 2130 1420 390 2700 990 2020 1350...
  • Page 134 MUZ-GX15NL MUY-GX15NL Rated Q(Btu/h): 14000 1) COOLING 1075 Indoor W.B. 71°F / 21.7°C 67°F / 19.4°C 63°F / 17.2°C Outdoor D.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 46.1 Q(Btu/h) 16440 12880 12530 8630 4730 2520 15560 11970 11870 8170 4480 2390 14620 10920 11150 7680 4210 2240 2590 1240 1930 1260 220 2440 1190 1820 1190 210 2320 1140 1730 1140...
  • Page 135 MUZ-GX15NL Rated Q(Btu/h): 18000 2) HEATING 1600 Indoor D.B. 78.8°F / 26.0°C 70°F / 21.1°C 59°F / 15.0°C Outdoor W.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 18.3 Q(Btu/h) 26230 22480 19680 13120 6560 3620 27300 23400 20480 13650 6830 3770 28370 24320 21280 14180 7100 3920 2860 1820 2140 1420 390 2710 1730 2030 1350 370 2570 1640 1920 1280...
  • Page 136 MUZ-GX15NLHZ Rated Q(Btu/h): 14000 1) COOLING 1075 Indoor W.B. 71°F / 21.7°C 67°F / 19.4°C 63°F / 17.2°C Outdoor D.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 46.1 Q(Btu/h) 16440 12880 12530 8630 4730 2520 15560 11970 11870 8170 4480 2390 14620 10920 11150 7680 4210 2240 2590 1240 1930 1260 220 2440 1190 1820 1190 210 2320 1140 1730 1140...
  • Page 137 MUZ-GX15NLHZ Rated Q(Btu/h): 14000 2) HEATING 1100 Indoor D.B. 78.8°F / 26.0°C 70°F / 21.1°C 59°F / 15.0°C Outdoor W.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 18.3 Q(Btu/h) 26230 17490 19680 13120 6560 3620 27300 18200 20480 13650 6830 3770 28370 18910 21280 14180 7100 3920 2860 1250 2140 1420 390 2710 1190 2030 1350 370 2570 1130 1920 1280...
  • Page 138 MUZ-GX18NL MUY-GX18NL Rated Q(Btu/h): 18000 1) COOLING 1280 Indoor W.B. 71°F / 21.7°C 67°F / 19.4°C 63°F / 17.2°C Outdoor D.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 46.1 Q(Btu/h) 19860 16560 14890 9910 4700 4700 18810 15390 14100 9390 4450 4450 17670 14040 13250 8820 4180 4180 2520 1470 1840 1120 390 2390 1420 1730 1070 380 2270 1360 1650 1020...
  • Page 139 MUZ-GX18NL Rated Q(Btu/h): 21600 2) HEATING 1680 Indoor D.B. 78.8°F / 26.0°C 70°F / 21.1°C 59°F / 15.0°C Outdoor W.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 18.3 Q(Btu/h) 34230 26980 25830 17110 8720 6230 35620 28080 26880 17810 9070 6480 37010 29180 27930 18510 9420 6730 4550 1910 3430 2280 1160 830 4320 1810 3260 2160 1100 790 4090 1710 3090 2040 1040...
  • Page 140 MUZ-GX18NLHZ Rated Q(Btu/h): 18000 1) COOLING 1280 Indoor W.B. 71°F / 21.7°C 67°F / 19.4°C 63°F / 17.2°C Outdoor D.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 46.1 Q(Btu/h) 19860 16560 14890 9910 4700 4700 18810 15390 14100 9390 4450 4450 17670 14040 13250 8820 4180 4180 2520 1470 1840 1120 390 2390 1420 1730 1070 380 2270 1360 1650 1020...
  • Page 141 MUZ-GX18NLHZ Rated Q(Btu/h): 19000 2) HEATING 1340 Indoor D.B. 78.8°F / 26.0°C 70°F / 21.1°C 59°F / 15.0°C Outdoor W.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 18.3 Q(Btu/h) 34230 23730 25670 17110 8560 5900 35620 24700 26720 17810 8910 6140 37010 25670 27770 18510 9260 6380 4550 1530 3410 2280 1140 780 4320 1450 3240 2160 1080 740 4090 1370 3070 2040 1020...
  • Page 142 MUZ-GX24NL MUY-GX24NL Rated Q(Btu/h): 22400 1) COOLING 1720 Indoor W.B. 71°F / 21.7°C 67°F / 19.4°C 63°F / 17.2°C Outdoor D.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 46.1 Q(Btu/h) 24390 20610 18850 13320 7790 6690 23090 19150 17850 12610 7380 6330 21700 17470 16770 11850 6940 5950 3390 1980 2520 1640 600 3210 1910 2390 1550 570 3050 1820 2270 1470...
  • Page 143 MUZ-GX24NL Rated Q(Btu/h): 27600 2) HEATING 2340 Indoor D.B. 78.8°F / 26.0°C 70°F / 21.1°C 59°F / 15.0°C Outdoor W.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 18.3 Q(Btu/h) 39970 34480 29980 19990 9990 6660 41600 35880 31200 20800 10400 6930 43230 37280 32420 21610 10810 7200 4550 2670 3410 2280 1140 760 4320 2530 3240 2160 1080 720 4090 2390 3070 2040 1020...
  • Page 144 MUZ-GX24NLHZ Rated Q(Btu/h): 22400 1) COOLING 1720 Indoor W.B. 71°F / 21.7°C 67°F / 19.4°C 63°F / 17.2°C Outdoor D.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 46.1 Q(Btu/h) 24390 20610 18850 13320 7790 6690 23090 19150 17850 12610 7380 6330 21700 17470 16770 11850 6940 5950 3390 1980 2520 1640 600 3210 1910 2390 1550 570 3050 1820 2270 1470...
  • Page 145 MUZ-GX24NLHZ Rated Q(Btu/h): 21200 2) HEATING 1500 Indoor D.B. 78.8°F / 26.0°C 70°F / 21.1°C 59°F / 15.0°C Outdoor W.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 18.3 Q(Btu/h) 39970 26480 30140 20000 10160 6350 41600 27560 31370 20810 10570 6610 43230 28640 32600 21620 10980 6870 4550 1710 3420 2280 1150 720 4320 1620 3250 2160 1090 680 4090 1530 3080 2040 1030...
  • Page 146 MUZ-GX30NL MUY-GX30NL Rated Q(Btu/h): 30600 1) COOLING 3380 Indoor W.B. 71°F / 21.7°C 67°F / 19.4°C 63°F / 17.2°C Outdoor D.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 46.1 Q(Btu/h) 27630 28150 22030 16630 11030 9300 26160 26160 20860 15750 10450 8810 24580 23870 19610 14800 9820 8280 3970 3890 3000 2050 1080 760 3750 3750 2830 1930 1010 720 3570 3580 2700 1840...
  • Page 147 MUZ-GX30NL Rated Q(Btu/h): 32600 2) HEATING 3360 Indoor D.B. 78.8°F / 26.0°C 70°F / 21.1°C 59°F / 15.0°C Outdoor W.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 18.3 Q(Btu/h) 42470 40720 31770 21410 10700 6910 44200 42380 33060 22280 11140 7190 45930 44040 34350 23150 11580 7470 4550 3820 3400 2300 1150 740 4320 3630 3230 2180 1090 700 4090 3440 3060 2060 1030...
  • Page 148 MUZ-GX36NL MUY-GX36NL Rated Q(Btu/h): 33800 1) COOLING 4020 Indoor W.B. 71°F / 21.7°C 67°F / 19.4°C 63°F / 17.2°C Outdoor D.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 46.1 Q(Btu/h) 30520 31100 24320 17900 11710 9300 28900 28900 23030 16950 11080 8810 27150 26360 21640 15930 10420 8280 4720 4620 3560 2370 1210 760 4460 4460 3360 2240 1140 720 4250 4260 3190 2130 1070...
  • Page 149 MUZ-GX36NL Rated Q(Btu/h): 35200 2) HEATING 3840 Indoor D.B. 78.8°F / 26.0°C 70°F / 21.1°C 59°F / 15.0°C Outdoor W.B. Max. Rated 75% Min. Max. Rated 75% Min. Max. Rated 75% Min. (°F) (°C) 18.3 Q(Btu/h) 44970 43970 33900 22470 11420 7140 46800 45760 35280 23390 11880 7430 48630 47550 36660 24310 12340 7720 4550 4370 3420 2280 1150 720 4320 4150 3250 2160 1090 680 4090 3930 3080 2040 1030...
  • Page 150 HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2024 MITSUBISHI ELECTRIC CORPORATION Issued: Jan. 2025 No. OBD951 REVISED EDITION-A Published: Dec. 2024 No. OBD951 Made in Japan Specifications are subject to change without notice.

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