Fuji Electric RSH30KMTB Service Manual
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Fuji Electric RSH30KMTB Service Manual

Fuji Electric RSH30KMTB Service Manual

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AIR CONDITIONER
Wall mounted type
INDOOR
OUTDOOR
SERVICE MANUAL
RSH30KMTB
RSH36KMTB
ROH30KMTB
ROH36KMTB
SR_AS073EJ_03
2022.10.25

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Summary of Contents for Fuji Electric RSH30KMTB

  • Page 1 AIR CONDITIONER Wall mounted type SERVICE MANUAL INDOOR RSH30KMTB RSH36KMTB OUTDOOR ROH30KMTB ROH36KMTB SR_AS073EJ_03 2022.10.25...
  • Page 2 Notices: • 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. ™...

  • Page 3: General Information

    CONTENTS 1. GENERAL INFORMATION 2. TECHNICAL DATA AND PARTS LIST 3. TROUBLESHOOTING 4. CONTROL AND FUNCTIONS 5. FILED WORKING...
  • Page 5 1. GENERAL INFORMATION 2022.07.19 SR_CH01_AS073EJ_02...
  • Page 6 CONTENTS 1. GENERAL INFORMATION 1. Specifications....................01-1 1-1. Indoor unit ........................01-1 1-2. Outdoor unit........................01-3 2. Dimensions....................01-4 2-1. Indoor unit ........................01-4 2-2. Outdoor unit........................01-6...
  • Page 7 1. Specifications 1-1. Indoor unit Wall mounted Type Inverter heat pump Model name RSH30KMTB RSH36KMTB Power supply 230 V~ 50 Hz Power supply intake Outdoor unit Available voltage range 198—264 V Rated Btu/h 27,300 32,100 Cooling 2.9—9.0 2.9—10.0 Min.—Max. Btu/h 9,900—30,700...
  • Page 8 Wall mounted Type Inverter heat pump Model name RSH30KMTB RSH36KMTB NOTES: • Specifications are based on the following conditions: – Cooling: Indoor temperature of 27 °CDB/19 °CWB, and outdoor temperature of 35 °CDB/24 °CWB. – Heating: Indoor temperature of 20 °CDB/15 °CWB, and outdoor temperature of 7 °CDB/6 °CWB.

  • Page 9: Outdoor Unit

    1-2. Outdoor unit Type Inverter heat pump Model name ROH30KMTB ROH36KMTB Power supply 230 V ~ 50 Hz Power supply intake Outdoor unit Available voltage range 198—264 V Starting current 10.2 13.9 Cooling 3,750 Airflow rate Heating 3,750 Type × Q'ty Propeller ×...
  • Page 10 2. Dimensions 2-1. Indoor unit ¢ Models: RSH30KMTB and RSH36KMTB 1,150 1,150 Outline of unit - (01-4) - 2-1. Indoor unit 2. Dimensions...

  • Page 11: Installation Space Requirement

     Installation space requirement Provide sufficient installation space for product safety. Unit: mm Outline of unit 50 or more 50 or more 70 or more 140 or more 1,500 or more - (01-5) - 2-1. Indoor unit 2. Dimensions...
  • Page 12 2-2. Outdoor unit ¢ Models: ROH30KMTB and ROH36KMTB Unit: mm 35.7 Top view 3 Way valve (Gas) 3 Way valve (Liquid) 25 67 Ф28: Cable port Pipe port Ф28: Cable port Ф28: Cable port Ф28: Cable port Ф28: Cable port Ф28: Cable port Pipe port Pipe port...
  • Page 13 2. TECHNICAL DATA AND PARTS LIST 2022.07.19 SR_CH02_AS073EJ_01...
  • Page 14 CONTENTS 2. TECHNICAL DATA AND PARTS LIST 1. Precautions....................02-1 2. Indoor unit parts list..................02-2 2-1. Models: RSH30KMTB and RSH36KMTB ...............02-2 3. Outdoor unit parts list.................02-6 3-1. Models: ROH30KMTB and ROH36KMTB ..............02-6 4. Accessories ....................02-10 4-1. Indoor unit ........................02-10 4-2. Outdoor unit........................02-10 5.
  • Page 15 1. Precautions When you start servicing, pay attention to the following points. For detailed precautions, refer to the installation manual of the products. CAUTION • Service personnel – Any person who is involved with working on or breaking into a refrigerant circuit should hold a current valid certificate from an industry-accredited assessment authority, which authorizes their competence to handle refrigerants safely in accordance with an industry recognized as- sessment specification.

  • Page 16: Exterior Parts

    2. Indoor unit parts list 2-1. Models: RSH30KMTB and RSH36KMTB ¢ Exterior parts - (02-2) - 2-1. Models: RSH30KMTB and RSH36KMTB 2. Indoor unit parts list...
  • Page 17 Wire cover assy ♦ 9315212016 Air clean filter assy ♦ 9318912005 Remote controller holder ♦ 9383712005 Remote controller assy ♦ — Casing — — Front panel — - (02-3) - 2-1. Models: RSH30KMTB and RSH36KMTB 2. Indoor unit parts list...
  • Page 18 ¢ Evaporator and control - (02-4) - 2-1. Models: RSH30KMTB and RSH36KMTB 2. Indoor unit parts list...
  • Page 19 (CN10 on Main PCB—Pyroelectric sensor) — Rear panel — — Box shield assy — — Control box — — PCB holder A — — Control cover — - (02-5) - 2-1. Models: RSH30KMTB and RSH36KMTB 2. Indoor unit parts list...
  • Page 20 3. Outdoor unit parts list 3-1. Models: ROH30KMTB and ROH36KMTB ¢ Exterior parts and chassis - (02-6) - 3-1. Models: ROH30KMTB and ROH36KMTB 3. Outdoor unit parts list...
  • Page 21 Item no. Part no. Part name Service part 9383880001 Top panel assy ♦ 9383779008 Protective net ♦ 9375361013 Net rubber ♦ 9900984038 Thermistor (Heat exchanger) ♦ 9900727154 Thermistor assy ♦ 9383607004 Thermo holder ♦ 9383874000 Right panel sub assy ♦ 9383879005 Rear pipe cover ♦...
  • Page 22 ¢ Compressor - (02-8) - 3-1. Models: ROH30KMTB and ROH36KMTB 3. Outdoor unit parts list...
  • Page 23 Item no. Part no. Part name Service part 9380516064 S-ABS (Top) ♦ 9900565091 Thermistor (Outdoor temp.) ♦ 9900186029 Pressure switch ♦ 9374425648 4-way valve assy ♦ 9970194016 Solenoid ♦ 9384848017 Accumulator assy ♦ 9970209000 Expansion valve coil ♦ 9380416029 Joint pipe D ♦...
  • Page 24 4. Accessories 4-1. Indoor unit ¢ Accessories Part name Exterior Q’ty Part name Exterior Q’ty Operating manual Drain hose insulation Operating manual Cloth tape (CD-ROM) Installation manual Tapping screw (large) Wall hook bracket Tapping screw (small) Remote controller Air cleaning filters Battery Filter holder Remote controller...
  • Page 25 5. Optional parts 5-1. Indoor unit ¢ Controllers Exterior Part name Model name Summary Easy finger touch operation with LCD panel. Backlit LCD enables easy operation in a dark room. Wired Remote UTY-RNRXZ* Wire type: Non-polar 2-wire Controller Optional Communication Kit is necessary for installation.
  • Page 26 ¢ Others Exterior Part name Model name Summary Use to connect with various peripheral devices and air conditioner PCB. External UTY-XWZX Connect Kit Connecting point: CN47 on Main PCB Required when external device is connected. External UTY-XWZXZ5 Connect Kit Connecting point: CN47 on Main PCB Use to connect with external devices and air conditioner PCB.

  • Page 27: Refrigerant System Diagrams

    6. Refrigerant system diagrams 6-1. Models: ROH30KMTB and ROH36KMTB Heat exchanger 3-way 3-way (INDOOR) valve valve Pressure switch 4-way valve Strainer Expansion valve Heat exchanger Strainer (OUTDOOR) : Cooling : Heating : Thermistor (Compressor temperature) : Thermistor (Discharge temperature) : Thermistor (Heat exchanger middle temperature) : Thermistor (Outdoor temperature) : Thermistor (Heat exchanger out temperature) : Thermistor (Pipe temperature)
  • Page 28 7. Wiring diagrams 7-1. Indoor unit ¢ Models: RSH30KMTB and RSH36KMTB - (02-14) - 7-1. Indoor unit 7. Wiring diagrams...
  • Page 29 7-2. Outdoor unit ¢ Models: ROH30KMTB and ROH36KMTB - (02-15) - 7-2. Outdoor unit 7. Wiring diagrams...
  • Page 30 8. PC board diagrams 8-1. Models: RSH30KMTB and RSH36KMTB CONTROL UNIT 30 model : EZ-0211EHSE 36 model : EZ-0211FHSE OPTION (2-WIRE REMOTE CONTROLLER UNIT) TERMINAL JXO-T3102-3P-B UTY-TWRXZ2 AWG22 UL1430 AWG22 BLACK REMOTE CN14 CN301 OUTDOOR UNIT CN300 AWG22 WHITE CONTROLLER B3 ( 5.0 ) B-XASK-1-A...
  • Page 31 8-2. Models: ROH30KMTB and ROH36KMTB P700 Thermistor Characteristics. INVERTER ASSEMBLY Temperature 30 and 36 models : EZ-0210AHUE Thermistor 15.83 k 5.90 k 3.78 k Thermistor ( Heatsink temp. ) 0.43 1.01 1.42 UL1015 5V-1 AWG20 GREEN BLACK P700 THERMISTOR ( HEATSINK TEMP. ) B03B-XAKK-1-A TERMINAL BLACK...
  • Page 32 - (02-18) - 8-2. Models: ROH30KMTB and ROH36KMTB 8. PC board diagrams...

  • Page 33: Troubleshooting

    3. TROUBLESHOOTING 2022.10.25 SR_CH03_AS073EJ_02...
  • Page 34 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) ..................03-3 2. Troubleshooting with error code ...............03-5 2-1.
  • Page 35 CONTENTS (continued) 4-2. Inverter compressor......................03-44 4-3. Outdoor unit Electronic Expansion Valve (EEV) ............03-45 4-4. Indoor unit fan motor ....................03-47 4-5. Outdoor unit fan motor ....................03-48 4-6. Pressure switch ......................03-49 4-7. 4-way valve coil (solenoid coil)/4-way valve ...............03-50 5. Thermistor resistance values..............03-51 5-1.

  • Page 37: Error Code

    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 38 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 39 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 (For outdoor unit)"...
  • Page 40 ● ○ ■ : Light on : Light off (n) : n Times blinking - (03-4) - 1-4. Error code table (Outdoor unit) 1. Error code...
  • Page 41 2. Troubleshooting with error code 2-1. E: 11. 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 42 Check point 4. Check serial signal (Reverse transfer signal) Check serial signal (Reverse transfer signal) WHITE BLACK • Check if indicated value swings between AC 90 V and AC 270 V at the outdoor unit terminal 1 —3. • If it is abnormal, check the parts below. –...
  • Page 43 2-2. E: 11. 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 03-3 Main PCB Indoor unit...
  • Page 44 Check point 4. Check serial signal (Forward transfer signal) Check serial signal (Forward transfer signal) WHITE BLACK • 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 45 2-3. E: 12. 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 03-3 Indoor unit Main PCB...
  • Page 46 2-4. E: 22. Indoor unit capacity error (Indoor unit) Operation indicator 2 time flash Timer indicator 2 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 22 outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-3 When the total capacity of the indoor units does not Detective actuator Indoor unit main PCB...
  • Page 47 2-5. E: 32. 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 03-3 When power is on and there is some below case.
  • Page 48 2-6. E: 35. 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 03-3 Indoor unit controller PCB When the MANUAL AUTO button becomes on for Detective actuator...
  • Page 49 2-7. E: 41. 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 03-3 Indoor unit main PCB Room temperature thermistor is open or short is Detective actuator...
  • Page 50 2-8. E: 42. 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 03-3 Indoor unit main PCB When heat exchanger temperature thermistor open or...
  • Page 51 2-9. E: 44. Human sensor error Operation indicator 4 time flash Timer indicator 4 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 44 Outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-3 1. Detect the open condition of the sensor. Detective actuator Indoor unit main PCB 2.
  • Page 52 2-10. E: 51. 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 03-3 main PCB When the actual rotation number of the indoor unit fan...
  • Page 53 2-11. E: 62. 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 03-3 Access to EEPROM failed due to some cause after Detective actuator...
  • Page 54 2-12. E: 63. 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 03-3 Detective actuator Outdoor unit Inverter PCB...
  • Page 55 2-13. E: 64. PFC circuit error (Outdoor unit) Operation indicator 6 time flash Timer indicator 4 time flash Indoor unit Indicator Economy indicator Continuous flash Error code E: 64 outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-3 •...
  • Page 56 2-14. E: 65. Trip terminal L 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 03-3 When the signal from FO terminal of IPM is “L”...
  • Page 57 2-15. E: 71. 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 03-3 Outdoor unit main PCB When discharge pipe temperature thermistor open or Detective actuator...
  • Page 58 2-16. E: 73. 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 03-3 Heat exchanger liquid temperature •...
  • Page 59 2-17. E: 74. 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 03-3 Outdoor unit main PCB When outdoor temperature thermistor open or short Detective actuator...
  • Page 60 2-18. E: 77. 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 03-3 Detective actuator Heat sink temperature thermistor Heat sink temperature thermistor short or open detected...
  • Page 61 2-19. E: 84. 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 03-3 When input current sensor has detected 0 A, while inverter compressor is operating at higher than 56 rps, Detective actuator...
  • Page 62 2-20. E: 86. 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 03-3 Outdoor unit main PCB When pressure switch open is detected in 10 seconds Detective actuator...
  • Page 63 2-21. E: 94. 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 03-3 Inverter PCB Protection stop by over-current generation after inverter compressor start processing completed generated...
  • Page 64 2-22. E: 95. 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 03-3 Inverter PCB 1.
  • Page 65 2-23. E: 97. 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 03-3 Inverter PCB 1.
  • Page 66 Check point 4. Check output voltage of inverter PCB Check outdoor unit circuit diagram and the voltage. (Measure at inverter PCB side connector) FAN MOTOR BLACK WHITE YELLOW BROWN NOTE: For details of wiring diagram, refer to "Wiring diagrams" in Chapter 2. TECHNICAL DATA AND PARTS LIST on page 02-14.
  • Page 67 2-24. E: 99. 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 03-3 Indoor unit main PCB When the indoor heat exchanger temperature is...
  • Page 68 Check point 4. Check the solenoid coil and 4-way valve NOTE: Refer solenoid coil and 4-way valve in "Service parts information" on page 03-43. • Solenoid coil Remove from PCB and check the resistance value of coil. Resistance value is 1.97 kΩ. →...
  • Page 69 2-25. E: A1. 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 03-3 Outdoor unit main PCB Protection stop by discharge temperature ≥...
  • Page 70 Check point 5. Check the refrigerant amount Check the refrigerant leakage. ↓ Check point 6. Replace the main PCB If check point 1 to 5 do not improve the symptom, replace the main PCB. ↓ - (03-34) - 2-25. E: A1. Discharge temperature error (Outdoor unit) 2.
  • Page 71 2-26. E: AC. 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 03-3 Outdoor unit inverter PCB Protection stop by heat sink temperature ≥...
  • Page 72 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 73 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 74 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 75 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 76 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 77: 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 78 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 79 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 80: Inverter Compressor

    4-2. Inverter compressor Check point 1. Check connection • Check terminal connection of compressor (loose or incorrect wiring) C (W) S(V) (BLACK) (WHITE) Inverter PCB R(U) (RED) • Check terminal connection of inverter PCB (loose or incorrect wiring) Inverter PCB P400(U) P401(V) P402(W) BLACK...
  • Page 81 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 02-14. Check point 2.
  • Page 82 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 83: Indoor Unit Fan Motor

    4-4. Indoor 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 84: Outdoor Unit Fan Motor

    4-5. 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 85: Pressure Switch

    4-6. Pressure switch • Type of contact Pressure • Characteristics of pressure switch Pressure switch 1 Contact: Short → Open 4.2 — 4.05 MPa Contact: Open → Short 3.2 ± 0.15 MPa 30/36 model: P770 - (03-49) - 4-6. Pressure switch 4.
  • Page 86 4-7. 4-way valve coil (solenoid coil)/4-way valve Check point 1. Check connection • Check the connection of connector P60. BLACK SOLENOID COIL BLACK ↓ Check Point 2 : Check solenoid coil Remove P60 from PCB and check the resistance value of coil. Resistance Value ≈...
  • Page 87 5. Thermistor resistance values 5-1. Indoor unit ¢ Room temperature thermistor Temperature (°C) Resistance (kΩ) Voltage (V) -10.0 58.25 0.73 -5.0 44.03 0.93 33.62 1.15 25.92 1.39 10.0 20.17 1.66 15.0 15.84 1.94 20.0 12.54 2.22 25.0 10.00 2.50 30.0 8.04 2.77 35.0...
  • Page 88 5-2. Outdoor unit ¢ Discharge temperature thermistor Temperature (°C) Resistance (kΩ) Voltage (V) -30.0 1,013.11 0.06 -25.0 729.09 0.09 -20.0 531.56 0.12 -15.0 392.31 0.16 -10.0 292.91 0.21 -5.0 221.09 0.28 168.60 0.36 129.84 0.46 10.0 100.91 0.57 15.0 79.12 0.71 20.0 62.55...
  • Page 89 ¢ Heat exchanger temperature thermistor Temperature (°C) Resistance (kΩ) Voltage (V) -30.0 95.58 0.24 -25.0 68.90 0.32 -20.0 50.30 0.43 -15.0 37.19 0.57 -10.0 27.80 0.73 -5.0 21.01 0.92 16.05 1.14 12.38 1.39 10.0 9.63 1.65 15.0 7.56 1.93 20.0 5.98 2.21 25.0...
  • Page 90 ¢ Heatsink thermistor Temperature (°C) Resistance (kΩ) Voltage (V) -30.0 94.26 0.08 -25.0 67.95 0.11 -20.0 49.62 0.15 -15.0 36.68 0.20 -10.0 27.42 0.26 -5.0 20.73 0.34 15.83 0.43 12.21 0.55 10.0 9.50 0.68 15.0 7.46 0.84 20.0 5.90 1.01 25.0 4.71 1.21...
  • Page 91 ¢ Compressor temperature thermistor Temperature (°C) Resistance (kΩ) Voltage (V) -30.0 1,013.11 0.06 -25.0 729.09 0.09 -20.0 531.56 0.12 -15.0 392.31 0.16 -10.0 292.91 0.21 -5.0 221.09 0.28 168.60 0.36 129.84 0.46 10.0 100.91 0.57 15.0 79.12 0.71 20.0 62.55 0.86 25.0 49.84...
  • Page 92 - (03-56) - 5-2. Outdoor unit 5. Thermistor resistance values...

  • Page 93: Control And Functions

    4. CONTROL AND FUNCTIONS 2022.08.22 SR_CH04_AS073EJ_01...

  • Page 94: Table Of Contents

    CONTENTS 4. CONTROL AND FUNCTIONS 1. Rotation number control of compressor...........04-1 1-1. Cooling operation ......................04-1 1-2. Heating operation ......................04-2 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 ........04-4 2.
  • Page 95 CONTENTS (continued) 8-4. Compressor temperature protection ................04-32 8-5. High pressure protection ....................04-32 8-6. Low outdoor temperature protection................04-32 8-7. High temperature and high pressure release control ............04-33...

  • Page 97: Rotation Number Control Of Compressor

    • Rotation number range of compressor Unit: rps Model name Minimum frequency Maximum frequency RSH30KMTB RSH36KMTB • Limit of maximum speed based on outdoor temperature Outdoor temperature rises Outdoor temperature drops 36°C...

  • Page 98: Heating Operation

    Unit: rps Model name Minimum frequency Maximum frequency RSH30KMTB RSH36KMTB 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.

  • Page 99: Rotation Number Of Compressor At Normal Start-Up

    1-4. Rotation number of compressor at normal start-up Rotation number of compressor soon after starting is controlled as below. 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 Time 2...

  • Page 100: Rotation Number Of Compressor Limitation By Outdoor Temperature

    A zone 55 rps B zone 52 rps C zone 47 rps D zone 39 rps E zone 33 rps RSH30KMTB F zone 25 rps RSH36KMTB G zone 18 rps H zone 20 rps I zone 20 rps J zone...
  • Page 101 Outdoor temperature zone frequency A zone 58 rps B zone 52 rps C zone 43 rps D zone 38 rps RSH30KMTB E zone 28 rps RSH36KMTB F zone 23 rps G zone 20 rps H zone 17 rps I zone...

  • Page 102: 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 18°C and 30°C in 1.0°C steps.

  • Page 103: Operation Flow Chart

    Operation flow chart Start Ts: Setting temperarure Monitor mode Room temp. > Ts+2°C? Room temp. < Ts-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 104: 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 RSH30KMTB RSH36KMTB POWERFUL 1,520 HIGH 1,330 MED+ 1,260 1,100 Heating QUIET...

  • Page 105: Fan Operation

    ¢ Fan operation Airflow can be switched in 5 steps such as AUTO, QUIET, LOW, MED, HIGH while indoor unit fan only runs. When fan mode is set at AUTO, it operates on MED fan speed. ¢ Cooling operation Switch the airflow AUTO, and indoor fan motor will run according to room temperature, as below. On the other hand, if switched in HIGH—QUIET, indoor motor will run at a constant airflow of COOL operation modes QUIET, LOW, MED, HIGH as shown in “Fan speed”...
  • Page 106 ¢ Cool air prevention control (heating mode) The maximum value of the indoor fan speed is set as shown below, based on the detected tempera- ture by the indoor heat exchanger sensor on heating mode. • Normal operation Indoor heat exchanger temperature rises Indoor heat exchanger HIGH...
  • Page 107 • Powerful operation Indoor heat exchanger temperature rises Indoor heat exchanger POWERFUL temperature drops 42°C 37°C HIGH 39°C 34°C 37°C 32°C Cool air prevention 30°C 28°C S-LOW 7 minutes later: Indoor heat exchanger temperature rises Indoor heat exchanger POWERFUL temperature drops 42°C 37°C HIGH...

  • Page 108: 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 Fan speed is defined by outdoor temperature and compressor frequency. Unit: rpm Fan step Cooling or dry Heating...

  • Page 109: Louver Control

    4. Louver control 4-1. Horizontal louver control Each time the button is pressed, the airflow direction range will change as below: Side view • Remote controller display is not changed. • Up/down airflow direction is set automatically as shown, in accordance with the type of operation selected.

  • Page 110: Swing Operation

    4-3. Swing operation • To select up/down airflow swing operation When the swing signal is received, the horizontal louver starts to swing. – Swinging range • Cooling mode/dry mode/fan mode (1 to 3): 1 ↔ 4 • Heating mode/fan mode (4 to 6): 3 ↔ 6 –...

  • Page 111: Timer Operation Control

    5. Timer operation control 5-1. 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 112: Sleep Timer

    ¢ 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 113: Wired Remote Control

    5-2. 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 114 ¢ 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 115: Temperature Setback Timer

    ¢ 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 116: Defrost Operation Control

    6. 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 117: Defrost Operation In Heating Operation Stopped

    6-1. 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 118: Various Control

    7. Various control 7-1. 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 119: Forced Cooling Operation

    7-3. Forced cooling operation The outdoor unit may not operate depending on the room temperature. When FORCED COOLING OPERATION button is pressed more than 10 seconds, forced cooling operation starts as shown in the table below. Operation mode Cooling Fan mode HIGH Timer mode Continuous (no timer setting available)

  • Page 120: Powerful Operation

    7-6. POWERFUL operation The POWERFUL operation starts by pressing POWERFUL button on the remote controller. The indoor unit and outdoor unit operate at maximum power as shown in the table below. Compressor frequency Maximum Fan mode POWERFUL Cooling Horizontal louver setting Heating Release condition: •...

  • Page 121: External Electrical Heater Control

    7-9. External electrical heater control The external electrical heater is operated as below. When the room Ts: Setting temperature temperature rises Heater : Off Ts -1°C Ts -3°C Heater : On Ts -10°C Ts -12°C Heater : Off When the room temperature drops NOTES: •...

  • Page 122: Human Sensor For Energy Saving

    7-13. Human sensor for energy saving If no one enters the room for approximately 20 minutes, the set temperature is automatically con- trolled. (When someone comes back into the room, the human sensor detect this, and automatically revert to the original settings.) Operation details Operation mode (If there is no one in the room for a while)

  • Page 123: Outdoor Unit Low Noise Operation

    7-15. Outdoor unit low noise operation The compressor frequency and outdoor unit fan speed are limited to reduce the operation noise by external input. Outdoor fan speed Compressor frequency Low noise mode Cooling/Dry Level 1 Heating Cooling/Dry Level 2 Heating NOTES: •...

  • Page 124: Unit Status Monitoring And The Detected Value Indication

    7-16. Unit status monitoring and the detected value indication The wired remote controller can monitor the indoor and outdoor units' status and display the detect- ed result as a relevant ID. For details of the display method, refer to the Chapter of “Display Sensor Values” in the Installation Manual of Wired Remote Controller (Touch Panel).
  • Page 125 Available Sensor ID Sensor ID Item Unit Remarks 0: Off, 1: On Cooling thermostat On/Off (External NOTE: The value is output even if 00: — output) the function setting or rotary switch is not set. 0: Off, 1: On Requested cooling strength On/Off NOTE: The value is output even if 00: —...
  • Page 126 Available Sensor ID Sensor ID Item Unit Remarks Switching cooling and heating mode 00: — 0: Cooling, 1: Heating (External input) Emergency stop (External input) 00: — 0: Off, 1: On Compressor status (External output) 00: — 0: Off, 1: On Error status (External output) 00: —...

  • Page 127: Various Protections

    8. Various protections 8-1. 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 128: Current Release Control

    8-3. 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 129: Operation

    8-7. 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 64 °C Zone A 60 °C 58 °C Zone B Zone C Stable zone Zone D Zone...
  • Page 130 - (04-34) - 8-7. High temperature and high pressure release control 8. Various protections...
  • Page 131 5. FILED WORKING 2022.08.22 SR_CH05_AS073EJ_01...
  • Page 132 CONTENTS 5. FILED WORKING 1. Function settings (For indoor unit)............05-1 1-1. Function settings by using remote controller ..............05-1 1-2. Custom code setting for wireless remote controller ............05-7 2. Function settings (For outdoor unit) ............05-8 2-1. Control PCB and switch buttons location................05-8 2-2.

  • Page 133: Function Settings (For Indoor Unit)

    1. Function settings (For indoor unit) To adjust the functions of this product according to the installation environment, various types of function settings are available. NOTE: Incorrect settings can cause a product malfunction. 1-1. Function settings by using remote controller Some function settings can be changed on the remote controller.

  • Page 134: Contents Of Function Setting

    NOTES: • The air conditioner custom code is set to prior to shipment. • If you do not know the air conditioner custom code setting, try each of the custom codes ( → → → ) until you find the code that operates the air conditioner. ¢...
  • Page 135 2) Room temperature control for indoor unit sensor 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 136: Auto Restart

    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 137 6) Remote controller custom code (Only for wireless remote controller) The indoor unit custom code can be changed. Select the appropriate custom code. Function number Setting value Setting description Factory setting ♦ 7) External input control "Operation/Stop" mode or "Forced stop" mode can be selected. Function number Setting value Setting description...
  • Page 138 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—08 (Setting prohibited) Error status Indoor unit fan operation status (Setting prohibited) 11) Special cooling operation...

  • Page 139: Custom Code Setting For Wireless Remote Controller

    1-2. Custom code setting for wireless remote controller To interconnect the air conditioner and the wireless remote controller, assignment of the custom code for the wireless remote controller is required. NOTE: Air conditioner cannot receive a signal if the air conditioner has not been set for the custom code.

  • Page 140: Function Settings (For Outdoor Unit)

    2. 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. • Never touch the terminals or the patterns on the parts that are mounted on the PCB. 2-1.
  • Page 141 ¢ 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 142: 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 143: Peak Cut Mode

    ¢ 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 144: External Input And Output (For Indoor Unit)

    3. External input and output (For indoor unit) External input and output PCB Indoor unit PCB CN47 (Ext. out) CN65 (Ext. in/out PCB) CN46 (Ext. in) SW301 SW302 Rotary switch CN314 CN313 CN312 CN311 CN310 CN308 Connecting point Input/Output Function Input select Input signal Operation/Stop...

  • Page 145: External Input

    3-1. External input With using external input function, some functions on this product can be controlled from an external device. • “Operation/Stop” mode or "Forced stop" mode can be selected with function setting of indoor unit. • A twisted pair cable should be used. Maximum length of cable is 150 m. •...

  • Page 146: External Input And Output Pcb

    ¢ External Input and Output PCB The indoor unit Operation/Stop can be set by using the input connector on the PCB. • Input select Use either one of these types of connectors according to the application. (Both types of connec- tors cannot be used simultaneously.) –...

  • Page 147: Input Signal Type

    ¢ 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 (SW302) on the External Input and Output PCB.

  • Page 148: 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 should be used. Maximum length of cable is 25 m. •...
  • Page 149 ¢ External Input and Output PCB • A twisted pair cable should be used. Maximum length of cable is 25 m. • Output voltage: High DC 12 V ±2 V, Low 0 V. • Permissible current: 50 mA • For details, refer to "Setting of external input and output"...

  • Page 150: Setting Of External Input And Output

    3-3. Setting of external input and output • Indoor unit Input Connection point Function setting number 46 Function Operation/Stop mode 1 (R.C. enabled) (Setting prohibited) CN46 Forced stop mode Operation/Stop mode 2 (R.C. disabled) Output Connection point Function setting number 60 Function Operation status 01 to 08...

  • Page 151: Details Of Control Input Function

    3-4. Details of control input function ¢ Operation/Stop mode 1 • In the case of "Edge" input External Input and Output PCB Function External input Input signal Command setting Rotary SW302 switch Off → On Operation — Input of indoor unit CN46 On →...
  • Page 152 ¢ Forced stop • In the case of "Edge" input External Input and Output PCB Function External input Input signal Command setting Rotary SW302 switch Forced stop Off → On (R.C. disabled) — Input of indoor unit CN46 Normal On → Off (R.C.

  • Page 153: Operation/Stop Mode

    ¢ Operation/Stop mode 2 • In the case of “Edge” input External Input and Output PCB Function External input Input signal Command setting Rotary SW302 switch Operation Off → On (R.C. enabled) — Input of indoor unit CN46 Stop On → Off (R.C.

  • Page 154: Forced Thermostat Off

    ¢ Forced thermostat off External Input and Output External input Input signal Command Rotary switch Off → On Thermostat off External Input and 2, B, C, D CN313 Output PCB On → Off Normal operation CN313 Compressor Room temp. Set temp. - (05-22) - 3-4.

  • Page 155: Details Of Control Output Function

    3-5. Details of control output function ¢ Operation status External Input and Function Output PCB External output Output signal Status setting Rotary switch Off → On Operation 60-00 1, 2 Output of indoor unit CN47 On → Off Stop Off → On Operation External Input and —...

  • Page 156: Indoor Unit Fan Operation Status

    ¢ Indoor unit fan operation status External Input and Function Output PCB External output Output signal Status setting Rotary switch Off → On Fan run 60-10 Output of indoor unit CN47 On → Off Fan stop Off → On Fan run External Input and —...

  • Page 157: External Input And Output (For Outdoor Unit)

    4. External input and output (For outdoor unit) With using external input and output functions, this product can be operated inter-connectedly with an external device. Connector Input Output Remarks P580 Low noise mode — PA580 Peak cut mode — See external input/output settings for details.
  • Page 158 ¢ Peak cut mode By performing following on-site work, operation that suppresses the current value can be enabled: The air conditioner is set to the “Peak cut mode” when closing the contact input of a commercial timer or on/off switch to a connector on the control PCB of the outdoor unit. •...

  • Page 159: External Output

    4-2. External output With using external output function, some status signals are transmitted to the control PCB, and the related LED lamp indicates the status of this product. ¢ Error status output Signal on air conditioner error status is generated when a malfunction occurs. •...

  • Page 160: Compressor Status Output

    ¢ Compressor status output Signal on compressor operation status is generated when the compressor is running. • Circuit diagram example • Output voltage (Vcc): DC 12 Outdoor unit V 50 mA or less control PCB Connected unit (Locally purchased) • *: Make the distance from Example: Connector...

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