Fujitsu AMUG30LMAS Service Manual
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Fujitsu AMUG30LMAS Service Manual

Fujitsu AMUG30LMAS Service Manual

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AIR CONDITIONER
Duct type
INDOOR
OUTDOOR
SERVICE MANUAL
AMUG30LMAS
AMUG36LMAS
AMUG48LMAS
AOUH30LUAH1
For Extra Cold Climate Region
AOUH36LMAH1
AOUH48LMAH1
SR_AR045EF_05
2023.07.12

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  • Page 1 AIR CONDITIONER Duct type SERVICE MANUAL For Extra Cold Climate Region INDOOR AMUG30LMAS AMUG36LMAS AMUG48LMAS OUTDOOR AOUH30LUAH1 AOUH36LMAH1 AOUH48LMAH1 SR_AR045EF_05 2023.07.12...
  • Page 2 • Product specifications and design are subject to change without notice for future improvement. • For further details, please check with our authorized dealer. Trademarks ™ FGLair is trademark of Fujitsu General Limited in the United States, other countries or both. ™ Google Play is trademark of Google LLC. ®...
  • Page 3 CONTENTS 1. GENERAL INFORMATION 2. TECHNICAL DATA AND PARTS LIST 3. TROUBLESHOOTING 4. CONTROL AND FUNCTIONS 5. FILED WORKING...
  • Page 5 1. GENERAL INFORMATION 2023.05.16 SR_CH01_AR045EF_03...
  • Page 6 CONTENTS 1. GENERAL INFORMATION 1. Specifications....................01-1 1-1. Indoor unit ........................01-1 1-2. Outdoor unit........................01-3 2. Dimensions....................01-5 2-1. Indoor unit ........................01-5 2-2. Outdoor unit........................01-8...
  • Page 7 1. Specifications 1-1. Indoor unit Duct Type Inverter, Heat pump Model name AMUG30LMAS AMUG36LMAS AMUG48LMAS Power supply 208/230 V ~ 60 Hz Power supply intake Outdoor unit Available voltage range 187—253 V 8.38 9.67 13.33 Rated Btu/h 28,600 33,000 45,500 Cooling 2.81—10.26...
  • Page 8 Duct Type Inverter, Heat pump Model name AMUG30LMAS AMUG36LMAS AMUG48LMAS NOTES: • Specifications are based on the following conditions: – Cooling: Indoor temperature of 80°FDB/67°FWB (26.67°CDB/19.44°CWB), and outdoor temperature of 95°FDB/75°FWB (35°CDB/23.9°CWB). – Heating: Indoor temperature of 70°FDB/59°FWB (21.11°CDB/15°CWB), and outdoor temperature of 47°FDB/43°FWB (8.33°CDB/6.11°CWB).
  • Page 9 1-2. Outdoor unit Type Inverter heat pump Model name AOUH30LUAH1 Power supply 208/230 V ~ 60 Hz Power supply intake Outdoor unit Available voltage range 187—253 V Starting current 11.4 Cooling 2,590 (4,400) Airflow rate CFM (m Heating 2,590 (4,400) Type ×...
  • Page 10 Type Inverter heat pump Model name AOUH36LMAH1 AOUH48LMAH1 Power supply 208/230 V ~ 60 Hz Power supply intake Outdoor unit Available voltage range 187—253 V Starting current 12.8 22.2 Cooling 3,767 (6,400) 4,297 (7,300) Airflow rate CFM (m Heating 3,649 (6,200) Type ×...
  • Page 11 2. Dimensions 2-1. Indoor unit ¢ Models: AMUG30LMAS, AMUG36LMAS, and AMUG48LMAS Unit: in (mm) 7/8 (22), 1-1/16 (27), 1-15/16 (50) Flanges are provided Dia. knockouts. for field installation Gas pipe Auxiliary drain connection Primary drain connection Auxiliary drain connection Liquid pipe...
  • Page 12 ¢ Installation space requirement Provide sufficient installation space for product safety. Unit: in (mm) (Top side) Maintenance access 4 (100) 24 (600) or more or more For installation method, the following 4 patterns • Pattern A: Vertical installation, air intake port at the bottom •...
  • Page 13 • Pattern C: Vertical installation, air intake port at the top Reversing the heat exchanger and reattaching the thermistor are required • Pattern D: Horizontal installation, air intake port at the left Reversing the heat exchanger and reattaching the thermistor are required - (01-7) - 2-1.
  • Page 14 2-2. Outdoor unit ¢ Model: AOUH30LUAH1 Unit: in (mm) 6-9/16 (166) 25-9/16 (650) 6-1/16 (154) 1-7/16 (36) 38-3/16 (970) 1-4/16 (32) 14-9/16 (370) 9/16 (14) Treminal blocks 3-Way valve (Liquid) 3-Way valve (Gas) Ø1-3/8 (34.5)(Cable port) Ø7/8 (22.2)(Cable port) Ø7/8 (22.2)(Cable port) Ø7/8 (22.2)(Cable port) Ø7/8 (22.2)(Cable port) Ø1-1/8 (27.8)(Cable port)
  • Page 15 ¢ Model: AOUH36LMAH1 Unit: in (mm) 6-9/16 25-9/16 6-1/16 (166) (650) (154) 1-7/16 (36) Top view 1-1/4 14-9/16 38-3/16 (970) (32) (370) (12) Terminal blocks 3-Way valve (Liquid) 3-Way valve (Gas) Ø1-3/8 (34.5)(Cable port) 2-3/16 3-1/2 13/16 (55) (89) (21) Pipe port 13/16 (21) 3-1/8 (80)
  • Page 16 ¢ Model: AOUH48LMAH1 Unit: in (mm) 6-9/16 25-9/16 6-1/16 (166) (650) (154) 1-7/16 (36) Top view 1-1/4 14-9/16 38-3/16 (970) (32) (370) (12) Terminal blocks 3-Way valve (Liquid) 3-Way valve (Gas) Ø1-3/8 (34.5)(Cable port) 2-3/16 3-1/2 13/16 (55) (89) (21) Pipe port 13/16 (21) 3-1/8 (80)
  • Page 17 2. TECHNICAL DATA AND PARTS LIST 2023.07.12 SR_CH02_AR045EF_04...
  • Page 18 CONTENTS 2. TECHNICAL DATA AND PARTS LIST 1. Precautions....................02-1 2. Indoor unit parts list..................02-2 2-1. Models: AMUG30LMAS, AMUG36LMAS, and AMUG48LMAS........02-2 3. Outdoor unit parts list................02-10 3-1. Model: AOUH30LUAH1....................02-10 3-2. Models: AOUH36LMAH1 and AOUH48LMAH1 ............02-14 4. Accessories ....................02-18 4-1. Indoor unit ........................02-18 4-2.
  • Page 19 • Service parts information and design are subject to change without notice for product improve- ment. • For the latest information of the service parts, refer to our Service Portal. https://fujitsu-general.force.com/portal/ • Precise figure of the service parts listed in this manual may differ from the actual service parts. - (02-1) -...
  • Page 20 2. Indoor unit parts list 2-1. Models: AMUG30LMAS, AMUG36LMAS, and AMUG48LMAS ¢ Exterior parts and chassis NOTE: Coil configuration differs by model. The coil diagram above represents the 30 model, which features an N-frame coil. The 36 and 48 models feature an A-frame coil.
  • Page 21 Coil group Replacement Coil RCH-3021SNAVUA RCH-4821SNAVUA RCH-4821SNAVUA Horizontal Adapter Kit See specified RCH Coil Parts List Drain Pan - Vertical See specified RCH Coil Parts List - (02-3) - 2-1. Models: AMUG30LMAS, AMUG36LMAS, and AMUG48LMAS 2. Indoor unit parts list...
  • Page 22 ¢ Blower assy - (02-4) - 2-1. Models: AMUG30LMAS, AMUG36LMAS, and AMUG48LMAS 2. Indoor unit parts list...
  • Page 23 Motor Mount - Arm (4) 70-19929-10 70-19929-10 70-19929-10 Blower Motor* 51-102601-01 51-102603-01 51-102603-01 Mounting Bracket Cover 10-101797-03 10-101797-03 10-101797-03 *: It is recommended that stock be maintained for this part. - (02-5) - 2-1. Models: AMUG30LMAS, AMUG36LMAS, and AMUG48LMAS 2. Indoor unit parts list...
  • Page 24 ¢ RCH coil RCH-3021SNAVUA - (02-6) - 2-1. Models: AMUG30LMAS, AMUG36LMAS, and AMUG48LMAS 2. Indoor unit parts list...
  • Page 25 Insulation - Horizontal Pan 68-100528-01 Rear/Front Shield (2) AE-101136-07 Straps (2) AE-100530-07 Drain Plug 68-100070-01 *: It is recommended that stock be maintained for this part. - (02-7) - 2-1. Models: AMUG30LMAS, AMUG36LMAS, and AMUG48LMAS 2. Indoor unit parts list...
  • Page 26 RCH-4821SNAVUA - (02-8) - 2-1. Models: AMUG30LMAS, AMUG36LMAS, and AMUG48LMAS 2. Indoor unit parts list...
  • Page 27 Insulation - Horizontal Pan 68-100528-06 Water Channel 10-107939-01 Water Channel 10-107939-02 Straps (2) 10-100530-09 Drain Plug 68-100070-01 *: It is recommended that stock be maintained for this part. - (02-9) - 2-1. Models: AMUG30LMAS, AMUG36LMAS, and AMUG48LMAS 2. Indoor unit parts list...
  • Page 28 3. Outdoor unit parts list 3-1. Model: AOUH30LUAH1 ¢ Exterior parts and chassis - (02-10) - 3-1. Model: AOUH30LUAH1 3. Outdoor unit parts list...
  • Page 29 Item no. Part no. Part name Service part 9379416030 Top panel sub assy ♦ 9378926059 Protective net assy (Rear) ♦ 9374420773 Condenser sub assy ♦ 9709687208 Inverter PCB ♦ 9711230140 Main PCB ♦ 9900428167 Terminal ♦ 9379425209 Base sub assy ♦...
  • Page 30 ¢ Compressor - (02-12) - 3-1. Model: AOUH30LUAH1 3. Outdoor unit parts list...
  • Page 31 Item no. Part no. Part name Service part 9374425747 4-way valve assy ♦ 9357804002 Thermostat holder ♦ 9382230005 Fusible plug pipe assy ♦ 9970209000 Expansion valve coil ♦ 9372514238 Suction pipe assy ♦ 9372700075 Accumulator sub assy ♦ 9378750395 Expansion valve total assy ♦...
  • Page 32 3-2. Models: AOUH36LMAH1 and AOUH48LMAH1 ¢ Exterior parts and chassis - (02-14) - 3-2. Models: AOUH36LMAH1 and AOUH48LMAH1 3. Outdoor unit parts list...
  • Page 33 9603794019 Motor,DC brushless ♦ 9380566007 Motor bracket sub assy ♦ 9380633068 Condenser sub assy ♦ — 9380477006 Label (FUJITSU) ♦ — 9380113027 Label (HALCYON) ♦ — Control box unit — - (02-15) - 3-2. Models: AOUH36LMAH1 and AOUH48LMAH1 3. Outdoor unit parts list...
  • Page 34 ¢ Compressor - (02-16) - 3-2. Models: AOUH36LMAH1 and AOUH48LMAH1 3. Outdoor unit parts list...
  • Page 35 Item no. Part no. Part name Service part 9374425730 4-way valve assy ♦ 9970209000 Expansion valve coil ♦ 9382230005 Fusible plug pipe assy ♦ 9372514221 Suction pipe assy ♦ 9372700099 Accumulator sub assy ♦ 9378750388 Expansion valve total assy ♦ 9315414045 3-way valve assy ♦...
  • Page 36 4. Accessories 4-1. Indoor unit ¢ Models: AMUG30LMAS, AMUG36LMAS, and AMUG48LMAS Part name Exterior Part name Exterior Operation manual Cable tie (large) Installation manual Cable tie (medium) (indoor unit) Rail Cable tie (small) Duct flanges Drain hose insulation Coupler heat insulation...
  • Page 37 5. Optional parts 5-1. Indoor unit ¢ Controllers Exterior Part name Model name Summary Easy finger touch operation with LCD Office Fri 10:00AM Mode Set Temp. Wired Remote panel. Backlit LCD enables easy Cool 80°F Custom Auto Auto 74°F Heat UTY-RNRUZ* Cool 84°F...
  • Page 38 For connection between indoor unit Modbus with UART interface and a Modbus UTY-VMSX Converter open network. Connecting point: CN65 on Main PCB This converter can control Fujitsu Thermostat General products using a third-party UTY-TTRX Converter thermostat controller. This converter is required when...
  • Page 39 NOTE: Combined use of following optional parts and WLAN Adapter is not allowed. • External Input and Output PCB • Modbus Converter • Thermostat Converter - (02-21) - 5-1. Indoor unit 5. Optional parts...
  • Page 40 6. Refrigerant system diagrams 6-1. Models: AOUH30LUAH1, AOUH36LMAH1, and AOUH48LMAH1 Heat exchanger 3-way 3-way (INDOOR) valve valve Pressure switch 4-way valve Strainer Expansion valve Strainer Heat exchanger (OUTDOOR) : Cooling : Heating : Thermistor (Compressor temperature) : Thermistor (Discharge temperature) : Thermistor (Heat exchanger middle temperature) : Thermistor (Outdoor temperature) : Thermistor (Heat exchanger out temperature)
  • Page 41 7. Wiring diagrams 7-1. Indoor unit ¢ Models: AMUG30LMAS, AMUG36LMAS, and AMUG48LMAS - (02-23) - 7-1. Indoor unit 7. Wiring diagrams...
  • Page 42 7-2. Outdoor unit ¢ Model: AOUH30LUAH1 ¢ Models: AOUH36LMAH1 and AOUH48LMAH1 - (02-24) - 7-2. Outdoor unit 7. Wiring diagrams...
  • Page 43 8. PC board diagrams 8-1. Models: AMUG30LMAS, AMUG36LMAS, and AMUG48LMAS UL1015 AWG20 BLACK CN70-1 CN70 UL1015 AWG20 WHITE CN70-2 B3 ( 8.0 ) B-PSILE-1 LIGHT BLUE FUSE F200 UL1015 AWG20 CN70-3 3.05A - 250V REMOTE SENSOR ( OPTION ) UTY-XSZX...
  • Page 44 8-2. Model: AOUH30LUAH1 INVERTER ASSEMBLY 30 model : EZ-0215HUE P700 Thermistor Characteristics. Temperature 32 ℉ 68 ℉ 86 ℉ Thermistor 15.83 k 5.90 k 3.78 k Thermistor ( Heatsink temp. ) UL1015 0.43 1.01 1.42 AWG20 DC5V-1 GREEN BLACK THERMISTOR ( HEATSINK TEMP. ) P700 TERMINAL B03B-XAKK-1-A...
  • Page 45 8-3. Models: AOUH36LMAH1 and AOUH48LMAH1 INVERTER ASSEMBLY 36 model : EZ-0216HUE P700 Thermistor Characteristics. 48 model : EZ-0217HUE Temperature 32 ℉ 68 ℉ 86 ℉ Thermistor 15.83 k 5.90 k 3.78 k Thermistor ( Heatsink temp. ) UL1015 0.43 1.01 1.42 AWG20 DC5V-1 GREEN BLACK THERMISTOR ( HEATSINK TEMP.
  • Page 46 - (02-28) - 8-3. Models: AOUH36LMAH1 and AOUH48LMAH1 8. PC board diagrams...
  • Page 47 3. TROUBLESHOOTING 2023.05.16 SR_CH03_AR045EF_02...
  • Page 48 CONTENTS 3. TROUBLESHOOTING 1. Error code ....................03-1 1-1. How to check the error memory..................03-1 1-2. How to erase the error memory ..................03-1 1-3. Error code table (Indoor unit and wired remote controller)..........03-2 1-4. Error code table (Outdoor unit) ..................03-4 2. Troubleshooting with error code ...............03-6 2-1.

  • Page 49: Table Of Contents

    CONTENTS (continued) 3-4. No cooling/No heating ....................03-46 3-5. Abnormal noise......................03-48 3-6. Water leaking........................03-49 4. Service parts information .................03-50 4-1. Compressor........................03-50 4-2. Inverter compressor......................03-51 4-3. Outdoor unit Electronic Expansion Valve (EEV) ............03-53 4-4. Outdoor unit fan motor....................03-55 4-5. 4-way valve coil (solenoid coil)/4-way valve ...............03-56 5.
  • Page 51 1. Error code When a problem occurs in the system or the connected device, the error content is notified by dis- playing the code. NOTE: This function is only available in a system with indoor or IR receiver units equipped with in- dicator lamps to show the error content.
  • Page 52 1-3. Error code table (Indoor unit and wired remote controller) The operation, timer, and economy indicators operate according to the error contents. For confirmation of the error contents, refer the flashing pattern as follows. Indoor unit display Wired remote Error contents Operation [ ] Timer [ ] Economy [ ]...
  • Page 53 Indoor unit display Wired remote Error contents Operation [ ] Timer [ ] Economy [ ] controller (Green) (Orange) (Green) display E: A3.X. Compressor temperature error 10 times 3 times Continuous (Outdoor unit) E: AC.X. Heat sink temperature error 10 times 12 times Continuous (Outdoor unit)
  • Page 54 1-4. Error code table (Outdoor unit) The operation status is determined by the lighting up and blinking of the LED lamp. After check that ERROR LED lamp blinks, press the ENTER button once. NOTE: For the positions of LED lamp and buttons, refer to "Function settings Function settings (For outdoor unit)"...
  • Page 55 PUMP LOW NOISE PEAK CUT POWER/ DOWN Error contents ERROR MODE E: 95.X. Compressor motor control ■ ● ■ ■ ○ ○ ○ ● error (Outdoor unit) E: 97.X. Outdoor unit fan motor error ■ ● ■ ■ ○ ○ ●...
  • Page 56 2. Troubleshooting with error code 2-1. E: 11.X. Serial communication error (Serial reverse transfer error) (Outdoor unit) Operation indicator 1 time flash Timer indicator 1 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 11 Outdoor unit Refer to "Error code table (Outdoor unit)"...
  • Page 57 Check point 4. Check serial signal (Reverse transfer signal) Check serial signal (Reverse transfer signal) BLACK WHITE BLACK WHITE • Check if indicated value swings between AC 90 V and AC 270 V at the outdoor unit terminal 1 —3. •...
  • Page 58 2-2. E: 11.X. Serial communication error (Serial forward transfer error) (Indoor unit) Operation indicator 1 time flash Timer indicator 1 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 11 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Main PCB Indoor unit...
  • Page 59 Check point 4. Check serial signal (Forward transfer signal) Check serial signal (Forward transfer signal) BLACK WHITE BLACK WHITE • Check if indicated value swings between AC 30 V and AC 130 V at outdoor unit terminal 2—3. • If it is abnormal, replace main PCB. ↓...
  • Page 60 2-3. E: 12.X. Wired remote controller communication error (Indoor unit) Operation indicator 1 time flash Timer indicator 2 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 12 outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Indoor unit Main PCB...
  • Page 61 2-4. E: 18.X. External communication error (Indoor unit) Operation indicator 1 time flash Timer indicator 8 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 18 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 External After receiving a signal from the external input and Detective actuator...
  • Page 62 2-5. E: 23.X. Combination error (Outdoor unit) Operation indicator 2 time flash Timer indicator 3 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 23 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 The outdoor unit receives the serial signal of applied Detective actuator Indoor unit...
  • Page 63 2-6. E: 26.X. Address setting error in wired remote controller (Indoor unit) Operation indicator 2 time flash Timer indicator 6 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 26 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Wired remote controller (2-wire) •...
  • Page 64 2-7. E: 29.X. Connected unit number error (Indoor unit) Operation indicator 2 time flash Timer indicator 9 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 29 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Wired remote controller (2-wire) When the number of the connected indoor unit exceeds Detective actuator...
  • Page 65 2-8. E: 32.X. Indoor unit main PCB error (Indoor unit) Operation indicator 3 time flash Timer indicator 2 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 32 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 When power is on and there is some below case.
  • Page 66 2-9. E: 35.X. MANUAL AUTO button error (Indoor unit) Operation indicator 3 time flash Timer indicator 5 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 35 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Indoor unit controller PCB When the MANUAL AUTO button becomes on for Detective actuator...
  • Page 67 2-10. E: 3A.X. Indoor unit communication circuit error (Indoor unit) Operation indicator 3 time flash Timer indicator 10 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 3A outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Wired remote controller (2-wire) When the indoor unit detects the configuration of remote...
  • Page 68 2-11. E: 41.X. Room temperature sensor error (Indoor unit) Operation indicator 4 time flash Timer indicator 1 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 41 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Indoor unit main PCB Room temperature thermistor is open or short is Detective actuator...
  • Page 69 2-12. E: 42.X. Indoor unit heat exchanger sensor error (Indoor unit) Operation indicator 4 time flash Timer indicator 2 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 42 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Indoor unit main PCB When heat exchanger temperature thermistor open or...
  • Page 70 2-13. E: 51.X. Indoor unit fan motor error (Indoor unit) Operation indicator 5 time flash Timer indicator 1 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 51 outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 main PCB When the actual rotation number of the indoor unit fan...
  • Page 71 2-14. E: 62.X. Outdoor unit main PCB error (Outdoor unit) Operation indicator 6 time flash Timer indicator 2 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 62 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Access to EEPROM failed due to some cause after Detective actuator...
  • Page 72 2-15. E: 63.X. Inverter error (Outdoor unit) Operation indicator 6 time flash Timer indicator 3 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 63 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Detective actuator Outdoor unit Inverter PCB...
  • Page 73 2-16. E: 65.X. IPM error (Outdoor unit) Operation indicator 6 time flash Timer indicator 5 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 65 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Main PCB 1.
  • Page 74 Check point 4. Check compressor Check compressor. (Refer to inverter compressor in "Service parts information".) ↓ Check point 5. Replace main PCB If Check point 1 to 4 do not improve the symptom, change main PCB. ↓ - (03-24) - 2-16.
  • Page 75 2-17. E: 71.X. Discharge thermistor error (Outdoor unit) Operation indicator 7 time flash Timer indicator 1 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 71 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Outdoor unit main PCB When discharge pipe temperature thermistor open or Detective actuator...
  • Page 76 2-18. E: 72.X. Compressor thermistor error (Outdoor unit) Operation indicator 7 time flash Timer indicator 2 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 72 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Outdoor unit main PCB When compressor temperature thermistor open or short Detective actuator...
  • Page 77 2-19. E: 73.X. Heat exchanger (Middle/Outlet) temperature thermistor error (Outdoor unit) Operation indicator 7 time flash Timer indicator 3 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 73 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Heat exchanger liquid temperature •...
  • Page 78 2-20. E: 74.X. Outdoor temperature thermistor error (Outdoor unit) Operation indicator 7 time flash Timer indicator 4 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 74 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Outdoor unit main PCB When outdoor temperature thermistor open or short Detective actuator...
  • Page 79 2-21. E: 77.X. Heat sink thermistor error (Outdoor unit) Operation indicator 7 time flash Timer indicator 7 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 77 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Detective actuator Heat sink temperature thermistor Heat sink temperature thermistor short or open detected...
  • Page 80 2-22. E: 84.X. Current sensor error (Outdoor unit) Operation indicator 8 time flash Timer indicator 4 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 84 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 When input current sensor has detected 0 A, while inverter compressor is operating at higher than 60 rps, Detective actuator...
  • Page 81 2-23. E: 86.X. High pressure switch error (Outdoor unit) Operation indicator 8 time flash Timer indicator 6 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 86 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Outdoor unit main PCB When pressure switch open is detected in 10 seconds Detective actuator...
  • Page 82 2-24. E: 94.X. Trip detection (Outdoor unit) Operation indicator 9 time flash Timer indicator 4 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 94 outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Main PCB Protection stop by over-current generation after inverter compressor start processing completed generated...
  • Page 83 2-25. E: 95.X. Compressor motor control error (Outdoor unit) Operation indicator 9 time flash Timer indicator 5 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 95 outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Main PCB 1.
  • Page 84 2-26. E: 97.X. Outdoor unit fan motor error (Outdoor unit) Operation indicator 9 time flash Timer indicator 7 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 97 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Main PCB 1.
  • Page 85 2-27. E: 99.X. 4-way valve error (Outdoor unit) Operation indicator 9 time flash Timer indicator 9 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 99 outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Indoor unit main PCB When the indoor heat exchanger temperature is...
  • Page 86 Check point 3. Check the solenoid coil and 4-way valve NOTE: Refer solenoid coil and 4-way valve in "Service parts information" on page 03-50. • Solenoid coil Remove P60 from PCB and check the resistance value of coil. Resistance value is 2,085 Ω (at 68 °F [20 °C]).
  • Page 87 2-28. E: 9A.X. Coil (Expansion valve) error Operation indicator 9 time flash Timer indicator 10 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 9A Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 EEV coil When the power is turned on and when the data of the Detective actuator...
  • Page 88 2-29. E: A1.X. Discharge temperature error (Outdoor unit) Operation indicator 10 time flash Timer indicator 1 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: A1 outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Protection stop by discharge temperature ≥...
  • Page 89 Check point 5. Check the refrigerant amount Check the refrigerant leakage. ↓ - (03-39) - 2-29. E: A1.X. Discharge temperature error (Outdoor unit) 2. Troubleshooting with error code...
  • Page 90 2-30. E: A3.X. Compressor temperature error (Outdoor unit) Operation indicator 10 time flash Timer indicator 3 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: A3 outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Protection stop by compressor temperature ≥...
  • Page 91 Check point 5. Check the refrigerant amount Check the refrigerant leakage. ↓ - (03-41) - 2-30. E: A3.X. Compressor temperature error (Outdoor unit) 2. Troubleshooting with error code...
  • Page 92 2-31. E: AC.X. Heat sink temperature error (Outdoor unit) Operation indicator 10 time flash Timer indicator 12 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: AC Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4 Outdoor unit inverter PCB Protection stop by heat sink temperature ≥...
  • Page 93 3. Troubleshooting without error code 3-1. Indoor unit—No power Power supply failure Forecast of cause External cause Electrical components defective Check point 1. Check installation condition • Isn’t the breaker down? • Check loose or removed connection cable. -> If abnormal condition is found, correct it by referring to the installation manual or the “DESIGN & TECHNICAL MANUAL”.
  • Page 94 3-2. Outdoor unit—No power Power supply failure Forecast of cause External cause Electrical components defective Check point 1. Check installation condition • Is the circuit breaker on or off? • Check loose or removed connection cable. → If abnormal condition is found, correct it by referring to the installation manual or the “DESIGN & TECHNICAL MANUAL”.
  • Page 95 3-3. No operation (Power is on) Setting/ Connection failure Forecast of cause External cause Electrical components defective Check point 1. Check indoor and outdoor installation condition • Indoor unit: – Check incorrect wiring between indoor unit and remote controller. – Check if there is an open cable connection.

  • Page 96: No Cooling/No Heating

    3-4. No cooling/No heating Indoor unit error Outdoor unit error Forecast of cause Effect by surrounding environment Connection pipe/Connection wire failure Refrigeration cycle failure Check point 1. Check Indoor unit • Does Indoor unit fan run in the HIGH mode? •...
  • Page 97 NOTES: • Strainer normally does not have temperature difference between inlet and outlet as shown be- low. Pipe (In) Pipe (Out) • If there is a difference like shown below, there is a possibility of inside clogged. In this case, re- place the strainer.

  • Page 98: Abnormal Noise

    3-5. Abnormal noise Abnormal installation (indoor unit/outdoor unit) Forecast of cause Fan failure (indoor unit/outdoor unit) Compressor failure (outdoor) Diagnosis method when abnormal noise is occurred Abnormal noise is coming from Outdoor Abnormal noise is coming from Indoor unit. unit. (Check and correct followings) (Check and correct followings) ↓...

  • Page 99: Water Leaking

    3-6. Water leaking Erroneous installation Forecast of cause Drain hose failure Diagnosis method when water is spitting Diagnosis method when water leak occurs • Is main unit installed in stable condi- tion? Is the filter clogged? • Is main unit broken or deformed at the time of transportation or maintenance? ↓...

  • Page 100: Service Parts Information

    4. Service parts information 4-1. Compressor Diagnosis method of compressor (If outdoor unit LED displays error, refer to troubleshooting) Does not start up Stops soon after starting up Abnormal noise ↓ ↓ ↓ Check if vibration noise by Is there open or loose con- Is there open or loose con- loose bolt or contact noise of nection cable?

  • Page 101: Inverter Compressor

    4-2. Inverter compressor Check point 1. Check the terminal connection. • Check the following terminal connections of the compressor. (Loosening or incorrect wiring.) T(W) S(V) (BLACK) (WHITE) Main PCB R(U) (RED) • Check terminal connection of inverter PCB (loose or incorrect wiring) Inverter PCB P400(U) P401(V) P402(W)
  • Page 102 Check point 3. Replace the Inverter PCB. If check point 1 to 2 do not improve the symptom, replace the Inverter PCB. - (03-52) - 4-2. Inverter compressor 4. Service parts information...

  • Page 103: Outdoor Unit Electronic Expansion Valve (Eev)

    4-3. Outdoor unit Electronic Expansion Valve (EEV) Check point 1. Check connections Check connection of connector. (Loose connector or open cable) NOTE: For details of wiring diagram, refer to "Wiring diagrams" in Chapter 2. TECHNICAL DATA AND PARTS LIST on page 02-23. Check point 2.
  • Page 104 Check point 6. Check strainer • Strainer normally does not have temperature difference between inlet and outlet as shown be- low. Pipe (In) Pipe (Out) • If there is a difference like shown below, there is a possibility of inside clogged. In this case, replace the strainer.

  • Page 105: Outdoor Unit Fan Motor

    4-4. Outdoor unit fan motor Check point 1. Check rotation of fan Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor) → If fan or bearing is abnormal, replace it. Check point 2.

  • Page 106: 4-Way Valve Coil (Solenoid Coil)/4-Way Valve

    4-5. 4-way valve coil (solenoid coil)/4-way valve Check point 1. Check connection • Check the connection of connector P60. BLUE SOLENOID COIL ↓ Check Point 2 : Check Solenoid Coil Remove P60 from PCB and check the resistance value of coil. Resistance Value ≈...

  • Page 107: Thermistor Resistance Values

    5. Thermistor resistance values 5-1. Indoor unit ¢ Room temperature thermistor Temperature °F (°C) Resistance (kΩ) Voltage (V) 14.0 (-10.0) 58.25 0.73 23.0 (-5.0) 44.03 0.93 32.0 (0.0) 33.62 1.15 41.0 (5.0) 25.92 1.39 50.0 (10.0) 20.17 1.66 59.0 (15.0) 15.84 1.94 68.0 (20.0)

  • Page 108: Outdoor Unit

    5-2. Outdoor unit ¢ Discharge temperature thermistor Temperature °F (°C) Resistance (kΩ) Voltage (V) -22.0 (-30.0) 1,000.13 0.06 -12.0 (-25.0) 720.28 0.09 -4.0 (-20.0) 525.51 0.12 5.0 (-15.0) 388.12 0.16 14.0 (-10.0) 289.97 0.21 23.0 (-5.0) 219.01 0.28 32.0 (0.0) 167.12 0.36 41.0 (5.0)
  • Page 109 ¢ Compressor temperature thermistor Temperature °F (°C) Resistance (kΩ) Voltage (V) -22.0 (-30.0) 1,013.11 0.06 -12.0 (-25.0) 729.09 0.09 -4.0 (-20.0) 531.56 0.12 5.0 (-15.0) 392.31 0.16 14.0 (-10.0) 292.91 0.21 23.0 (-5.0) 221.09 0.28 32.0 (0.0) 168.60 0.36 41.0 (5.0) 129.84 0.46 50.0 (10.0)
  • Page 110 ¢ Heat exchanger temperature thermistor Temperature °F (°C) Resistance (kΩ) Voltage (V) -22.0 (-30.0) 95.58 0.24 -12.0 (-25.0) 68.90 0.32 -4.0 (-20.0) 50.31 0.43 5.0 (-15.0) 37.19 0.57 14.0 (-10.0) 27.81 0.73 23.0 (-5.0) 21.02 0.92 32.0 (0.0) 16.05 1.14 41.0 (5.0) 12.38 1.39...
  • Page 111 ¢ Heat sink thermistor Temperature °F (°C) Resistance (kΩ) Voltage (V) -22.0 (-30.0) 94.26 0.08 -12.0 (-25.0) 67.95 0.11 -4.0 (-20.0) 49.62 0.15 5.0 (-15.0) 36.68 0.20 14.0 (-10.0) 27.42 0.26 23.0 (-5.0) 20.73 0.34 32.0 (0.0) 15.83 0.43 41.0 (5.0) 12.21 0.55 50.0 (10.0)
  • Page 112 - (03-62) - 5-2. Outdoor unit 5. Thermistor resistance values...
  • Page 113 4. CONTROL AND FUNCTIONS 2023.05.16 SR_CH04_AR045EF_02...
  • Page 114 CONTENTS 4. CONTROL AND FUNCTIONS 1. Rotation number control of compressor...........04-1 1-1. Cooling operation ......................04-1 1-2. Heating operation ......................04-1 1-3. Dry operation ........................04-2 1-4. Rotation number of compressor at normal start-up ............04-3 1-5. Rotation number of compressor limitation by outdoor temperature ........04-5 2.

  • Page 115: Rotation Number Control Of Compressor

    • Rotation number range of compressor Unit: rps Model name Minimum frequency Maximum frequency AMUG30LMAS AMUG36LMAS AMUG48LMAS - (04-1) - 1-1. Cooling operation 1. Rotation number control of compressor...

  • Page 116: Dry Operation

    1-3. Dry operation The rotation number of compressor shall change according to the temperature, set temperature, and room temperature variation which the room temperature sensor of the indoor unit has detected as shown in the table below. Zone is defined by set temperature and room temperature. •...

  • Page 117: Rotation Number Of Compressor At Normal Start-Up

    1-4. Rotation number of compressor at normal start-up ¢ Model: AOUH30LUAH1 Rotation number of compressor soon after starting is controlled as below. Rotation number X Rotation number IX Rotation number VIII Rotation number VII Rotation number VI Rotation number V Rotation number IV Rotation number III Rotation number II...
  • Page 118 ¢ Models: AOUH36LMAH1 and AOUH48LMAH1 Rotation number of compressor soon after starting is controlled as below. • Normal operation Rotation number IX Rotation number VIII Rotation number VII Rotation number VI Rotation number V Rotation number IV Rotation number III Rotation number II Rotation number I Time 1...

  • Page 119: Rotation Number Of Compressor Limitation By Outdoor Temperature

    1-5. Rotation number of compressor limitation by outdoor temperature The minimum rotation number of compressor is limited by outdoor temperature as below. • Cooling/Dry mode K zone 122.0 °F (50 °C) J zone 114.8 °F (46 °C) I zone 107.6 °F (42 °C) H zone 100.4 °F...
  • Page 120 • Heating mode F zone 68.0 °F (20 °C) E zone 44.6 °F (7 °C) D zone 35.6 °F (2 °C) C zone 14.0 °F (-10 °C) B zone 5.0 °F (-15 °C) A zone Limitation of compressor Model name Outdoor temperature zone frequency A zone...

  • Page 121: Auto Changeover Operation

    2. Auto changeover operation When the air conditioner is set to AUTO mode by remote controller, operation starts in the optimum mode from among heating, cooling, dry and monitoring modes. During operation, the optimum mode is automatically switched in accordance with temperature changes. The temperature can be set be- tween 64.4 °F (18 °C) and 86.0 °F (30 °C) in 1.0 °F (0.5 °C) steps.
  • Page 122 Operation flow chart Start Ts: Setting temperarure Monitor mode Room temp. > Ts+3.6°F(2°C)? Room temp. < Ts-3.6°F(2°C)? Middle zone Auto change over is second or more? Operation mode before the monitor mode is cooling mode? Operation mode of Heating operation Cooling operation outdoor unit: Cooling? Thermostat remains...

  • Page 123: Fan Control

    3. Fan control Tr: Room temperature Ts: Setting temperature 3-1. Indoor fan control ¢ Fan speed Indoor fan speed is defined as below. Speed (rpm) Operation mode Fan mode AMUG30LMAS AMUG36LMAS AMUG48LMAS HIGH 1,200 1,640 1,020 Heating QUIET S-LOW HIGH...
  • Page 124 ¢ Heating operation Switch the airflow AUTO, and the indoor fan motor will run according to a room temperature, as be- low. On the other hand, if switched in HIGH—QUIET, the indoor motor will run at a constant airflow of HEAT operation modes QUIET, LOW, MED, HIGH as shown in “Fan speed”...

  • Page 125: Outdoor Fan Control

    3-2. Outdoor fan control ¢ Outdoor fan motor This outdoor unit has a DC fan motor. (Control method is different between AC and DC motors.) ¢ Fan speed  Model: AOUH30LUAH1 Fan speed is defined by outdoor temperature and compressor frequency. Unit: rpm Fan step Cooling or dry...
  • Page 126  Models: AOUH36LMAH1 and AOUH48LMAH1 Fan speed is defined by outdoor temperature and compressor frequency. Unit: rpm (First row: upper fan, second row: lower fan) Fan step Cooling or dry Heating — — — S-HIGH — NOTE: After defrost control on the heating mode, the fan speed is kept higher regardless of the compressor frequency.

  • Page 127: Timer Operation Control

    4. Timer operation control 4-1. Wireless remote control On/Off timer Program timer Sleep timer Weekly timer ○ ○ ○ — ¢ On/Off timer • Off timer: When the clock reaches the set timer, the air conditioner will be turned off. Operation mode Stop mode Set time of timer...
  • Page 128 ¢ Sleep timer If the sleep timer is set, the room temperature is monitored and the operation is stopped auto- matically. If the operation mode or the set temperature is change after the sleep timer is set, the operation is continued according to the changed setting of the sleep timer from that time on. •...

  • Page 129: Wired Remote Control

    4-2. Wired remote control Temperature On/Off timer Program timer Sleep timer Weekly timer Setback Timer ○ ○ ○ ○ ○ ¢ On/Off timer • Off timer: When the clock reaches the set timer, the air conditioner will be turned off. Operation mode Stop mode Set time of timer...
  • Page 130 ¢ Sleep timer If the sleep timer is set, the room temperature is monitored and the operation is stopped auto- matically. If the operation mode or the set temperature is change after the sleep timer is set, the operation is continued according to the changed setting of the sleep timer from that time on. •...
  • Page 131 ¢ Temperature Setback Timer • The temperature setback timer only changes the set temperature for 7 days, it cannot be used to start or stop air conditioner operation. • The temperature setback timer can be set to operate up to two times per day but only one temperature setting can be used.

  • Page 132: Defrost Operation Control

    5. Defrost operation control Tn: Outdoor unit heat exchanger temperature Ta: Outdoor temperature Tn10: Temperature at 10 minutes after compressor start Tnb: Temperature before 5 minutes Triggering condition • The defrost operation starts when outdoor unit heat exchanger temperature sensor detects the temperature lower than the values shown below.

  • Page 133: Defrost Operation In Heating Operation Stopped

    5-1. Defrost operation in heating operation stopped If the outdoor unit is frosted when stopping the heating operation, it stops after performing the auto- matic defrosting operation. In this time, if the indoor unit operation lamp flashes slowly (6 sec on/2 sec off), the outdoor unit al- low the heat exchanger to defrost, and then stop.

  • Page 134: Various Control

    6. Various control 6-1. Auto restart When the power was interrupted by a power failure etc. during operation, the operation contents at that time are memorized and when the power is recovered, operation is automatically started with the memorized operation contents. Operation contents memorized when the power is interrupted Operation mode Setting temperature...

  • Page 135: Compressor Preheating

    6-4. Compressor preheating By preheating the compressor, warm airflow is quickly discharged when the operation is started. • Triggering condition 1 – Outdoor temperature ≤ 68°F (20°C) When outdoor temperature reaches 78.8°F (26°C), compressor preheating stops. – 30 minutes after compressor stopped •...

  • Page 136: Peak Cut Operation

    6-8. Peak cut operation The current value is limited to reduce the power consumption by external input. Peak cut level Level 1 Level 2 Level 3 Level 4 Forced thermostat Peak cut for rated capacity 100% NOTES: • During defrost operation, peak cut operation becomes invalid. •...

  • Page 137: Various Protections

    7. Various protections 7-1. Discharge gas temperature over-rise prevention control The discharge gas temperature sensor (discharge thermistor: outdoor unit side) detects the dis- charge gas temperature. • When the discharge temperature becomes higher than the trigger condition, the compressor fre- quency is decreased as the table below, and it continues to decrease until the discharge tempera- ture becomes lower than the trigger condition.

  • Page 138: Current Release Control

    7-3. Current release control The rotation number of compressor is controlled so that the outdoor unit input current does not ex- ceeds current limit value set according to the outdoor temperature. The rotation number of compressor returns according to the operation mode, when the current be- comes lower than the release value.

  • Page 139: High Pressure Protection

    7-5. High pressure protection Pressure switch: Off (Open: Higher than 4.2 MPa) Trigger condition Compressor stop Pressure switch: On (Close: Lower than 3.2 MPa) Release condition (3 minutes after compressor stop) Compressor restart 7-6. Low outdoor temperature protection When the outdoor temperature sensor detects lower than the trigger condition below, the compres- sor is stopped.

  • Page 140: High Temperature And High Pressure Release Control

    7-7. High temperature and high pressure release control The compressor is controlled as follows. • Cooling mode Indoor unit heat exchanger Indoor unit heat exchanger temperature rises temperature drops 149.0°F (65°C) Zone A 143.6°F (62°C) 140.0°F (60°C) Zone B Zone C Stable zone Zone D Zone...
  • Page 141 5. FILED WORKING 2023.05.16 SR_CH05_AR045EF_03...
  • Page 142 CONTENTS 5. FILED WORKING 1. Function settings (For indoor unit)............05-1 1-1. Function settings on indoor unit..................05-1 1-2. Function settings by using remote controller ..............05-2 2. Function settings Function settings (For outdoor unit) ......05-10 2-1. Control PCB and switch buttons location..............05-10 2-2.

  • Page 143: Function Settings (For Indoor Unit)

    NOTE: Incorrect settings can cause a product malfunction. 1-1. Function settings on indoor unit ¢ Models: AMUG30LMAS, AMUG36LMAS, and AMUG48LMAS By using some components on the PCB, you can change the function settings. Related components on the PCB and the applicable settings...

  • Page 144: Function Settings By Using Remote Controller

    1-2. Function settings by using remote controller Some function settings can be changed on the remote controller. After confirming the setting proce- dure and the content of each function setting, select appropriate functions for your installation envi- ronment. ¢ Setting procedure by using remote controller Remote controller is not attached for this product.
  • Page 145 2) Room temperature control for indoor unit sensor NOTE: If the remote sensor unit option is selected, perform this setting. Depending on the installed environment, correction of the room temperature sensor may be re- quired. Select the appropriate control setting according to the installed environment. The temperature of the room temperature sensor is corrected as follows: Corrected temp.
  • Page 146 3) Room temperature control for wired remote controller sensor Depending on the installed environment, correction of the wire remote temperature sensor may be required. Select the appropriate control setting according to the installed environment. To change this setting, set Function 42 to “Both“ (01). Ensure that the Thermo Sensor icon is displayed on the remote controller screen.
  • Page 147 6) Cold air prevention This setting is to disable the cold air prevention function during heating operation. When disabled, the fan setting will always follow the setting on the remote controller. (Excluding defrost mode) Function number Setting value Setting description Factory setting Enable ♦...
  • Page 148 10) Switching functions for external output terminal Functions of the external output terminal can be switched. For details, refer to “External input and output”. Function number Setting value Setting description Factory setting Operation status ♦ 01—04 Cooling thermostat On Heating operation Operation/Stop 07—08 Cooling thermostat On...
  • Page 149 12) Operating temperature switching of external heaters Sets the temperature conditions when the external heater is ON. For details, refer to “External heater output” in Chapter 3-4. "Details of function" on page 05-24. Setting description Setting value of function 61: Function Setting Factory...
  • Page 150 14) Outdoor temperature zone boundary temperature B Setting required if changing of the outdoor temperature setting for heat pump only zone is required when auxiliary heater control by outdoor temperature 1 is performed on the indoor unit. For details, refer to “External heater output” in Chapter 3-4.
  • Page 151 18) Fan delay time Sets the fan delay time when the heater is turned off. Function number Setting value Setting description Factory setting 1 minute ♦ 50 seconds 40 seconds 30 seconds 19) External heater use in defrosting Enables or disables external heater use in defrosting. NOTE: Inappropriate heater selection may cause cold air in defrosting.

  • Page 152: Function Settings Function Settings (For Outdoor Unit)

    2. Function settings Function settings (For outdoor unit) Perform appropriate function setting locally according to the installation environment. NOTE: Incorrect settings can cause a product malfunction. CAUTION • Before setting up the switch buttons, discharge the static electricity from your body. •...
  • Page 153 ¢ Switch buttons and the functions LED lamps S134 S133 S132 S131 S130 Switch buttons LED lamp Function or operation method Lights on while power on. (1) POWER/MODE Green Blinks to show the local setting on the outdoor unit or the error code. (2) ERROR Blinks during error operation.

  • Page 154: Local Setting Procedure

    2-2. Local setting procedure NOTE: Before performing the function setting, be sure to stop the operation of the air conditioner. ¢ Low noise mode Press the MODE switch button (S134) for 3 seconds or more to switch to “Local setting mode”. After confirming the LED lamp of POWER/MODE blinks 9 times, press the ENTER switch but- ton (S132).
  • Page 155 ¢ Peak cut mode Press the MODE switch button (S134) for 3 seconds or more to switch to “Local setting mode”. After confirming the LED lamp of POWER/MODE blinks 9 times, press the ENTER switch but- ton (S132). PUMP POWER LOW NOISE PEAK CUT DOWN...
  • Page 156 ¢ Maximum circuit breaker Press the MODE switch button (S134) for 3 seconds or more to switch to “Local setting mode”. After confirming the LED lamp of POWER/MODE blinks 9 times, press the ENTER switch but- ton (S132). PUMP POWER LOW NOISE PEAK CUT DOWN...
  • Page 157 NOTES: • When pressed number is lost during setting, you must redo the setting procedure. Return to “Operation status display (Normal operation)” by pressing the EXIT switch button once, and restart from the beginning of the setting procedure. • Check the breaker capacity label after changing the setting. Breaker Capacity Label Service Panel...
  • Page 158 ¢ Base pan heater forced off Press the MODE switch button (S134) for 3 seconds or more to switch to “Local setting mode”. After confirming the LED lamp of POWER/MODE blinks 9 times, press the ENTER switch but- ton (S132). PUMP POWER LOW NOISE...

  • Page 159: External Input And Output

    3. External input and output Rotary switch CN47 CN65 Fig. External input and output PCB Terminal (External in) External out External in/out PCB (Connect with Wire kit) Remote sensor External Input connect kit External input External output Connector Input select signal (Optional parts)
  • Page 160 ¢ External input and output PCB The indoor unit Operation/Stop can be set by using the input terminal on the PCB.  Input select Use either one of these types of terminals according to the application. (Both types of terminals cannot be used simultaneously.) •...

  • Page 161: External Output

    3-2. External output Use an external output cable with appropriate external dimension, depending on the number of ca- bles to be installed. ¢ Indoor unit • A twisted pair cable (22AWG) should be used. Maximum length of cable is 82 ft (25 m). •...
  • Page 162 ¢ External input and output PCB • A twisted pair cable (22AWG) should be used. • Permissible voltage and current: DC 5 V to 30 V / 3 A, AC 30 V to 250 V / 3 A • For details, refer to Chapter 3-3.

  • Page 163: Combination Of External Input And Output

    3-3. Combination of external input and output By combining the function setting of the indoor unit and rotary switch setting of the External input and output PCB, you can select various combinations of functions. Combination examples of external input and output are as follows: External input External input Function...
  • Page 164 External output External input Function and output Indoor unit Mode External input and output PCB setting PCB (Rotary Output CN47 Output 1 Output 2 Output 3 Indoor unit fan 60-00 Operation/Stop Operation/Stop Error status operation status Indoor unit fan External heater 60-00 Operation/Stop Error status...
  • Page 165 ¢ Input signal type • Indoor unit Input signal type is only "Edge". Edge • External input and output PCB The input signal type can be selected. Signal type (edge or pulse) can be switched by the DIP switch 2 (SW2) on the External input and output PCB.

  • Page 166: Details Of Function

    3-4. Details of function ¢ Control input function  When function setting is "Operation/Stop" mode 1 • In the case of "Edge" input Rotary SW of Function External input and External input Input signal Command setting / output PCB Off → On Operation Input of indoor unit Terminal...
  • Page 167  When function setting is "Forced stop" mode • In the case of "Edge" input Rotary SW of Function External input and External input Input signal Command setting / output PCB Off → On Forced stop Input of indoor unit Terminal On →...
  • Page 168  When function setting is "Operation/Stop" mode 2 • In the case of "Edge" input Rotary SW of Function External input and External input Input signal Command setting / output PCB Off → On Operation Stop Input of indoor unit Terminal (Remote On →...
  • Page 169 ¢ Forced thermostat off function Function Rotary SW of External External input Input signal Command setting / input and output PCB 60-00 / 2 60-02 / 4 60-05 / 7 Off → On Thermostat off 60-06 / 8 External input and output Input 1 60-08 / A 60-09 / B...
  • Page 170 ¢ Error status Function Rotary SW of External External output Output signal Command setting / input and output PCB Low → High Error 60-09 / B Output of indoor unit CN47 High → Low Normal 60-00 / 2 Off → On Error 60-01 / 3 60-02 / 4...
  • Page 171 ¢ Indoor unit fan operation status Function Rotary SW of External External output Output signal Command setting / input and output PCB Low → High Fan run 60-10 / C Output of indoor unit CN47 High → Low Fan stop 60-00 / 2 Off →...
  • Page 172 ¢ External heater output Function setting Indoor unit Wired R. C. Control Primary heater Auxiliary heater Control switching external heaters Sensor activation* No. 61 Auxiliary heater Heat pump 61-00 — External device* control 1 Auxiliary heater Heat pump External device 61-01 —...
  • Page 173 Return air • Inappropriate designing and installation of external heater may cause a fire by emitted heat from the external heater. • Fujitsu General Ltd. is not responsible for inappropriate designing or installation of external heat- ing device. - (05-31) - 3-4.
  • Page 174  Auxiliary equipment control by room temperature Auxiliary equipment control is switchable by room temperature. Auxiliary equipment switching is per- formed for each room temperature divided to following 3 zones. Zone A Ts +0.9°F (0.5 °C) Ts: Setting temperature Ts -0.9°F (-0.5 °C) Tr: Room temperature Zone B Zone C...
  • Page 175  Auxiliary heater control 1 Operation Condition Heater on Heater is on as shown in following diagram of heating temperature. • Heater is off as shown in following diagram of heating temperature. • Other than heating mode Heater off • Error occurred •...
  • Page 176  Heat pump prohibition control Perform heating by external heater only. Indoor unit is continuous thermostat off. Operation Condition Heater is on as shown in following diagram of heating Heater on temperature. DIP-SW101-3 • Heater is off as shown in following diagram of heating temperature.
  • Page 177  Auxiliary heater control by outdoor temperature 1 This control selects heat pump or external heater according to the outdoor temperature. When out- door temperature is high, the heating is performed by using heat pump only. Operation Condition Heater is on as shown in following diagram of heating Heater on temperature.
  • Page 178 • Operation status 46.4°F (8°C) 42.8°F (6°C) Outdoor temperature (Factory setting) -0.4°F (-18°C) -4°F (-20°C) Heat pump Heat pump Combination zone prohibition only zone zone Outdoor temperature zone* Comp. On/Off 12 V Heater DIP-SW101-3: On DIP-SW101-3: Off *: The outdoor temperature zone transition from one to another will stay in that zone for minimum of 30 min. NOTE: In following operations, compressor will be on in heat pump prohibition zone.
  • Page 179  Auxiliary heater control by outdoor temperature 2 This control selects heat pump or external heater according to the outdoor temperature. Even when outdoor temperature is high, the heating is performed by using both of heat pump and external heater. Operation Condition Heater on...
  • Page 180 • Operation status 46.4°F (8°C) 42.8°F (6°C) Outdoor temperature (Factory setting) -0.4°F (-18°C) -4°F (-20°C) Heat pump Combination zone prohibition zone Outdoor temperature zone * Comp. On/Off 12 V Heater DIP-SW101-3 On DIP-SW101-3 Off * The outdoor temperature zone transition from one to another will stay in that zone for minimum of 30 min. NOTE: In following operations, compressor will be on in heat pump prohibition zone.
  • Page 181  Auxiliary heater control by outdoor temperature 3 This control selects heat pump or external heater according to the outdoor temperature. Even when outdoor temperature is high, the heating is performed by using both of heat pump and external heater. Operation Condition Heater on...
  • Page 182 • Operation status Heat pump only zone 46.4°F (8°C) 42.8°F (6°C) Outdoor temperature (Factory setting) -0.4°F (-18°C) -4°F (-20°C) Combination zone Outdoor temperature zone * Comp. On/Off 12 V Heater DIP-SW101-3 On DIP-SW101-3 Off *: The outdoor temperature zone transition from one to another will stay in that zone for minimum of 30 min. NOTE: In following operations, compressor will be on in heat pump prohibition zone.
  • Page 183  Auxiliary heat pump control • External heater output Operation Condition Heater is on as shown in following diagram of heating Heater on temperature. DIP-SW101-3 • Heater is off as shown in following diagram of heating temperature. • Other than heating mode Indoor unit fan •...
  • Page 184  Auxiliary heat pump control by outdoor temperature 1 • External heater output Operation Condition Heater on Heater is on as shown in following diagram of heating temperature. DIP-SW101-3 • Heater is off as shown in following diagram of heating temperature.
  • Page 185 • Outdoor temperature zone Outdoor temp. Combination zone     ( Heat pump + Heater) A + 3.6°F ( 2°C): -0.4°F (-18°C) *A: -4°F (-20°C)   Heater only zone   *: Adjustable by function setting 67 • Operation status 46.4°F (8°C) 42.8°F (6°C) Outdoor temperature (Factory setting)
  • Page 186  Auxiliary heat pump control by outdoor temperature 2 • External heater output Operation Condition Heater is on as shown in following diagram of heating Heater on temperature. DIP-SW101-3 • Heater is off as shown in following diagram of heating temperature.
  • Page 187 • Outdoor temperature zone Outdoor temp. Heater only zone B + 3.6°F (2°C): 46.4°F (8°C) *B: 42.8°F (6°C) Combination zone (Heat pump + Heater) *: Adjustable by function setting 67 • Operation status Heat pump prohibition zone 46.4°F (8°C) 42.8°F (6°C) Outdoor temperature (Factory setting) -0.4°F (-18°C)
  • Page 188  Auxiliary heat pump control by outdoor temperature 3 • External heater output Operation Condition Heater is on as shown in following diagram of heating Heater on temperature. DIP-SW101-3 • Heater is off as shown in following diagram of heating temperature.
  • Page 189 • Outdoor temperature zone Outdoor temp. Heater only zone     B + 3.6°F (2°C): 46.4°F (8°C) B: 42.8°F (6°C)*   Combination zone   (Heat pump + Heater) A + 3.6°F (2°C): -0.4°F (-18°C) A: -4°F (-20°C)*   Heater only zone  ...
  • Page 190 ¢ Heating thermostat on for humidifier Indoor unit Function External output setting Situation Mode Rotary SW Heating Indoor unit fan Heating thermostat on operation thermostat on no. 60 status 60-05 CN47 Example of 60-06 Output 3 individual Not used 60-07 Output 2 connection 60-08...

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