Hitachi RPI-0.8FSG1 Service Manual

Inverter-driven multi-split system heat pump air conditioners

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HITACHI INVERTER-DRIVEN

MULTI-SPLIT SYSTEM

HEAT PUMP AIR CONDITIONERS

SET FREE FSG(1)/FS3, FS5 SERIES

This service mamual provides the technical

information for the HITACHI Inverter-Driven

Multi-Split System Heat Pump Air

Conditioners, "SET FREE, FSG(1)/FS3, FS5

and FXG/FX3 Series".

Read this manual carefully before starting

service activities.

AND

SET FREE FXG/FX3 SERIES

Models

• In-the-Ceiling Type

RPI-0.8FSG1

RPI-2.5FSG1

RPI-1.0FSG1

RPI-3.0FSG1

RPI-1.5FSG1

RPI-4.0FSG1

RPI-2.0FSG1

RPI-5.0FSG1

• 4-Way Cassette Type

RCI-1.0FSG2

RCI-2.5FSG2

RCI-1.5FSG2

RCI-3.0FSG2

RCI-2.0FSG2

RCI-4.0FSG2

• 2-Way Cassette Type

RCD-1.0FSG1

RCD-2.5FSG1

RCD-1.5FSG1

RCD-3.0FSG1

RCD-2.0FSG1

RCD-4.0FSG1

• Wall Type

RPK-1.0FSGM6

RPK-2.0FSGM6

RPK-1.5FSGM6

RPK-2.3FSGM6

• Floor Type

RPF-1.0FSG(E)

RPF-1.5FSG(E)

• Floor Concealed Type

RPFI-1.0FSG(E)

RPFI-1.5FSG(E)

• Ceiling Type

RPC-2.0FSG1

RPC-3.0FSG1

RPC-2.5FSG1

RPC-4.0FSG1

• FSG(1) Series

RAS-5FSG

RAS-16FSG

RAS-8FSG

RAS-20FSG

RAS-10FSG

• FS3, FS5 Series

RAS-5FS3

RAS-16FS3

RAS-8FS3

RAS-20FS3

RAS-10FS3

• FXG Series

RAS-8FXG

RAS-10FXG

• FX3 Series

RAS-8FX3

RAS-10FX3

• Total Heat Exchangers

KPI-2521

KPI-5021

RPI-8FSG1

RPI-10FSG1

RCI-5.0FSG2

RCD-5.0FSG1

RPC-5.0FSG1

RAS-24FSG1

RAS-30FSG1

RAS-24FS5

RAS-30FS5

KPI-8021

KPI-10021

P5413553

Table of Contents

Troubleshooting

Summary of Contents for Hitachi RPI-0.8FSG1

Page 1 RAS-16FS3 RAS-24FS5 RAS-8FS3 RAS-20FS3 RAS-30FS5 RAS-10FS3 This service mamual provides the technical • FXG Series information for the HITACHI Inverter-Driven RAS-8FXG RAS-10FXG Multi-Split System Heat Pump Air • FX3 Series Conditioners, “SET FREE, FSG(1)/FS3, FS5 RAS-8FX3 RAS-10FX3 and FXG/FX3 Series”.
Page 3: Table Of Contents
- CONTENTS - Page 1. TROUBLESHOOTING ..........................1-1 Initial Troubleshooting ........................1-1 1.1.1 Rotary Switch and Dip Switch Setting ..................1-1 1.1.2 Checking of Electrical Wiring ......................1-5 1.1.3 Checking by 7-Segment Display ....................1-10 1.1.4 Emergency Operation when Inverter Compressor is Damaged ........... 1-11 1.1.5 Failure of Power Supply to Indoor Unit and Remote Control Switch ..........
Page 4 RAS-20FSG, RAS-5FS3, RAS-8FS3, RAS-10FS3, RAS-16FS3, RAS-20FS3, RAS-8FXG, RAS-10FXG, RAS-8FX3 and RAS-10FX3) .................. 2-31 2.1.16 Removing Electrical Components (RAS-24FSG1, RAS-30FSG1, RAS-24FS5 and RAS-30FS5) ............. 2-33 In-the-Ceiling Type (RPI-0.8FSG1 to RPI-5.0FSG1) ................. 2-37 2.2.1 Removing Long Life Filter ......................2-37 2.2.2 Removing Printed Circuit Board (PCB) ..................2-37 2.2.3...
Page 5 - CONTENTS - Page 4-Way Cassette Type ......................... 2-55 2.4.1 Removing Long Life Filter ......................2-55 2.4.2 Removing Air Intake Grille ......................2-55 2.4.3 Removing Electrical Box Cover ....................2-56 2.4.4 Removing Optional Air Panel ......................2-56 2.4.5 Removing Fan Runner and Fan Motor ..................2-57 2.4.6 Removing Bell-Mouth ........................
Page 6 - CONTENTS - Page Floor Concealed Type ........................2-102 2.8.1 Removing Air Filter ........................2-102 2.8.2 Removing Front Covers ........................ 2-102 2.8.3 Removing Fan Motor ........................2-103 2.8.4 Removing Printed Circuit Board (PCB) ..................2-103 2.8.5 Removing Thermistors for Liquid Pipe and Gas Pipe ..............2-103 Ceiling Type ............................
Page 7 - CONTENTS - Page 3. MAIN PARTS .............................. 3-1 Inverter ............................... 3-1 3.1.1 Specifications of Inverter (For 380/415V, 50Hz and 380V, 60Hz Power Source) ......3-1 3.1.2 Specifications of Inverter (For 220V, 60Hz Power Source) ............3-3 3.1.3 Arrangement of Inverter Power Unit ..................... 3-5 3.1.4 Inverter Time Chart ........................
Page 8 - CONTENTS - Page 4. OPTIONAL FUNCTION ..........................4-1 Indoor Unit (For RPF(I)-FSG(E), RPK-FSGM(6), RPC-FSG1 (Before Alteration) and RPI (8, 10HP) Series) ..4-1 4.1.1 Remote Control ON/OFF Function ....................4-1 4.1.2 Power Supply ON/OFF 1 (Automatic Operation When Power Supply ON) ........4-5 4.1.3 Power Supply ON/OFF 2 (Restarting Function After Power Failure) ..........
Page 9 - CONTENTS - Page 5. FIELD WORK INSTRUCTION ........................5-1 Burnt-out Compressor due to Insufficient Refrigerant Charge ............5-1 Insufficient Cooling Performance When A Long Piping Is Applied ............. 5-2 Abnormally High Operating Sound [In-the-Ceiling Type Indoor Unit] ..........5-3 Alarm Code “31”...
Page 10 RCD-2.5FSG1 60277513 60277574 From U4US3677 RCD-3.0FSG1 60277514 60277575 From U4UT2126 RCD-4.0FSG1 60277515 60277576 From U4UT2131 RCD-5.0FSG1 60277516 60277577 From U4UT2136 RPI-0.8FSG1 60277401 60277591 From U4UH8281 RPI-1.0FSG1 60277402 60277592 From U4UH8301 RPI-1.5FSG1 60277403 60277593 From U4UD3950 RPI-2.0FSG1 60277339 60277594 From U4UH8341 RPI-2.5FSG1...
Page 11: Troubleshooting
TROUBLESHOOTING TROUBLESHOOTING Initial Troubleshooting 1.1.1 Rotary Switch and Dip Switch Setting (1) Indoor Unit The PCB in the indoor unit is equipped with 7 types of dip switches and rotary switch. Before testing unit, set these dip switches according to the following instructions. Unless these dip switches are set in the field, the unit can not be operated.
Page 12 Model Code <Model Code> Position 1 2 3 4 1 2 3 4 1 2 3 4 (a) RPI-0.8FSG1 to RPI-10FSG1 (b) RCD-1.0FSG1 to RCD-5.0FSG1 Model Code (c) RPC-2.0FSG1 to RPC-5.0FSG1 (d) RPF-1.0FSG(E) and RPFI-1.0 FSG(E) Setting (e) RPF-1.5FSG(E) and RPFI-1.5FSG(E)
Page 13 TROUBLESHOOTING <In Case of 5 to 20HP> <DSW1 to 3: for FSG/FS3 Series> DSW1 Ref. System No. Setting DSW2 Capacity Setting DSW3 Height Difference When H-Link is used, setting Each outdoor unit is set as shown is required. below before shipment. B.S.
Page 14 TROUBLESHOOTING <In Case of 24 and 30HP> DSW1 Ref. System No. Setting DSW2 Capacity Setting DSW3 Height Difference When H-Link is used, setting Each outdoor unit is set as shown is required. below before shipment. B.S. * The O.U. is located higher than I. U. RAS-24FSG1 RAS-30FSG1 (0 to 50m)
Page 15: Checking Of Electrical Wiring
TROUBLESHOOTING (3) CH Unit (For FX Series Only) Before setting dip switches, firstly turn OFF power source and set the position of the dip switches. If the dip switches are set without turning OFF the power source, the switches can not function. NOTE The “■”...
Page 16 TROUBLESHOOTING Example for Electrical Wiring Connection of FSG, FS3, FSG1 and FS5 System Outdoor Unit (5 to 20HP) <380-415V/50Hz, 380V/60Hz> Max. 4 Units / Power Supply Line (5, 8 and 10HP) Outdoor Unit 1 Outdoor Unit / Power Supply Line (16 and 20 HP) RAS-5FS3 RAS-8FS3 No.
Page 17 TROUBLESHOOTING Outdoor Unit (24 and 30HP) <380-415V/50Hz, 380V/60Hz> Outdoor Unit No. 0 System Outdoor Unit RAS-24FSG1 RAS-30FSG1 L1 L2 L3 N RAS-24FS5 Operating Line (Shielded Twist Pair Cable) RAS-30FS5 DC5V (Non-Pole Transmission H-LINK System) Distribution Box or Pull Box *2 Distribution Box or Pull Box *2 FUSE Main Switch...
Page 18 TROUBLESHOOTING Table 1.1 Electrical Data and Recommended Wiring, Breaker Size/1 Outdoor Unit <FS Series> Max. Power Nominal Running Supply Fuse Power Nominal Model Sensitive Current Line Supply Current Current (φmm) (mA) RAS-5FSG MLFC 0.75SQ RAS-5FS3 RAS-8FSG MLFC 2SQ RAS-8FS3 RAS-10FSG MLFC 3.5SQ RAS-10FS3 RAS-16FSG...
Page 19 TROUBLESHOOTING Example for Electrical Wiring Connection of FXG and FX3 System Outdoor Unit Max. 4 Units / Power Supply Line RAS-8FXG RAS-8FX3 No. 0 System No. 1 System No. 3 System RAS-10FXG Outdoor Unit Outdoor Unit Outdoor Unit RAS-10FX3 L1 L2 L3 N L1 L2 L3 N L1 L2 L3 N Operating Line (Shielded Twist Pair Cable)
Page 20: Checking By 7-Segment Display
TROUBLESHOOTING 1.1.3 Checking by 7-Segment Display (1) Simple Checking by 7-Segment Display / Turn on All Indoor Units / All the Indoor Units Connected to the Outdoor Unit Turn on the Outdoor Unit Auto-addressing Starts During auto-addressing, the following items can be checked using the outdoor unit's on-board 7-segment LED display.
Page 21: Emergency Operation When Inverter Compressor Is Damaged
TROUBLESHOOTING 1.1.4 Emergency Operation when Inverter Compressor is Damaged (1) Failure of Inverter Compressor a. Contents of Operation (Applied Models: RAS-8FSG(3), 10FSG(3), 16FSG(3), 20FSG(3), 24FSG1(5), 30FSG1(5) / RAS-8FXG(3), 10FXG(3)) * This operation is an emergency operation by a constant compressor, when the inverter compressor is failed.
Page 22 TROUBLESHOOTING (2) Failure of Constant Speed Compressor a. Contents of Operation (Applied Models: RAS-8FSG(3), 10FSG(3), 16FSG(3), 20FSG(3), 24FSG1(5), 30FSG1(5) / RAS-8FXG(3), 10FXG(3)) * This operation is an emergency operation by the inverter compressor, when the constant speed compressor is failed. * This operation is controlled by a normal control.
Page 23: Failure Of Power Supply To Indoor Unit And Remote Control Switch
TROUBLESHOOTING 1.1.5 Failure of Power Supply to Indoor Unit and Remote Control Switch G Lights and LCD are not Indicated. G Not Operated If fuses are melted or a breaker is activated, investigate the cause of over current and take necessary action.
Page 24: Abnormal Transmission Between Remote Control Switch And Indoor Unit
TROUBLESHOOTING (1.1.5 Failure of Power Supply to Indoor Unit and Remote Control Switch) Check it by Replace remote Failure of Remote Control Switch self-checking mode *1). control switch if failed. Unconnected Wires Correctly connect Check connectors. to PCB wires. Failure of PCB Check it by Failure of PCB Replace PCB if failed.
Page 25: Abnormalities Of Devices
TROUBLESHOOTING 1.1.7 Abnormalities of Devices In the case that no abnormality (Alarm Code) is indicated on the remote control switch, and normal operation is not available, take necessary action according to the procedures mentioned below. Action Phenomenon Cause Check Item (Turn OFF Main Switch) Disconnected Measure coil...
Page 26 TROUBLESHOOTING (1.1.7 Abnormalities of Devices) Action Phenomenon Cause Check Item (Turn OFF Main Switch) Check Setting Condition of "Thermistor of Remote Control Switch" by Optional Setting * Setting and Control "00": Control by Indoor Thermistor for Suction Air In case that "01": Control by Incorrect Optional thermistor of remote...
Page 27 TROUBLESHOOTING (1.1.7 Abnormalities of Devices) Action Phenomenon Cause Check Item (Turn OFF Main Switch) Failure of Failure of Thermistor Replace or correctly Discharge Check thermistor by connect wiring when Air Temp. self-checking *2). Disconnected it is abnormal. Thermistor Wire of Thermistor Failure of Remote Indoor Fan...
Page 28 TROUBLESHOOTING (1.1.7 Abnormalities of Devices) Action Phenomenon Cause Check Item (Turn OFF Main Switch) Indoor Heat Load is Greater Calculate heat load. Use a bigger unit. than Cooling Capacity Gas Leakage Correctly charge or Shortage Measure superheat. refrigerant after of Refrigerant repairing gas leakage.
Page 29 TROUBLESHOOTING (1.1.7 Abnormalities of Devices) Action Phenomenon Cause Check Item (Turn OFF Main Switch) Check Clogging of Outdoor Unit Remove clogging. Heat Exchanger. Obstacles at inlet or Insufficient outlet of outdoor unit Remove obstacles. Air Flow to heat exchanger? Outdoor Unit Heat Is service space for Secure service space.
Page 30 TROUBLESHOOTING (1.1.7 Abnormalities of Devices) Action Phenomenon Cause Check Item (Turn OFF Main Switch) Indoor Heat Load is Greater Replace the unit with Calculate heat load. than Heating Capacity a bigger unit. Gas Leakage Correctly charge or Insufficient refrigerant after gas Measure superheat.
Page 31 TROUBLESHOOTING (1.1.7 Abnormalities of Devices) Action Phenomenon Cause Check Item (Turn OFF Main Switch) Check for filter clogging. Remove clogging. Insufficient Air Flow to Check for any obstacles Indoor Unit at inlet or outlet of Remove obstacles. Heat indoor unit. Exchanger Check indoor fan speed.
Page 32 TROUBLESHOOTING (1.1.7 Abnormalities of Devices) Action Phenomenon Cause Check Item (Turn OFF Main Switch) Foreign Particles Inside Remove foreign Check it by viewing. of Fan Casing particles. Indoor Unit Fan Runner Adjust position of Check it by viewing. is Hitting Casing fan runner.
Page 33: Troubleshooting Procedure
TROUBLESHOOTING Troubleshooting Procedure G Alarm Code Indication of Remote Control Switch Indoor Unit Alarm Code Model Code Connected No. Alarm Code Number of Indoor Units COOL COOL ADDS. RN Indicated ALARM ALARM for a second alternately 1.2.1 Alarm Code Table Code No.
Page 34: Troubleshooting By Alarm Code
TROUBLESHOOTING 1.2.2 Troubleshooting by Alarm Code Alarm Activation of Safety Device in Indoor Unit Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 35 TROUBLESHOOTING Alarm Activation of Safety Device in Outdoor Unit Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section and the unit No.
Page 36 TROUBLESHOOTING Action Phenomenon Cause Check Item (Turn OFF Main Switch) Clogging of Heat Remove clogging. Exchanger? Check for dust on Remove dust. air filter. Insufficient Air Flow to Heat Exchanger Check for any obstacles (Outdoor Heat Exchanger at inlet or outlet of Remove obstacles.
Page 37 TROUBLESHOOTING Action Phenomenon Cause Check Item (Turn OFF Main Switch) Check for clogging. Remove clogging. Check connecting Replace connector. wiring and connectors. Faulty or Malfunction of Check operating sound Replace coil. Expansion Valve from coil. Check discharge gas Replace thermistor. thermistor.
Page 38 TROUBLESHOOTING FS SYSTEM Alarm Abnormal Transmitting between Indoor Units and Outdoor Unit Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, or the unit No.
Page 39 TROUBLESHOOTING Is DSW10-1P (Terminal Resistance) Set it correctly. on PCB1 ON? Is the voltage between faston Check the fuses of Is LED1 (red) on terminal "R1" and outdoor unit power PCB1 ON? "N" of PCB1 220V supply. or 240V? Remove CN2 of PCB1.
Page 40 TROUBLESHOOTING Action Phenomenon Cause Check Item (Turn OFF Main Switch) Measure voltage by Power Failure of No Power Supply Supply power. tester. Check for breakage Remove short circuit Short Circuit between Wires of insulation. and replace fuse. Short Circuited Wire Measure insulation Remove short circuit to to Ground...
Page 41 TROUBLESHOOTING FX SYSTEM Alarm Abnormal Transmitting between Indoor Units and Outdoor Unit Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, or the unit No.
Page 42 TROUBLESHOOTING Is DSW10-1P (Terminal Resistance) Set it correctly. on PCB1 ON? *1) Is the voltage between faston Check the fuses of Is LED1 (red) on terminal "R1" and outdoor unit power PCB1 ON? "N" of PCB1 220V supply. or 240V? Remove CN2 of PCB1.
Page 43 TROUBLESHOOTING Is LED2 (yellow) on PCB(1) ON? Faulty PCB(1) Is LED2 (yellow) on PCB(1) flickering Are other units in Unit more than once in same condition? 10 seconds? Faulty PCB1 Connect CN8 of PCB(1). Is PCB1' setting Non-pole operating. Set it correctly. Is LED3 (yellow) Is LED3 on ON even if CN2 of...
Page 44 TROUBLESHOOTING Action Phenomenon Cause Check Item (Turn OFF Main Switch) Measure voltage Power Failure or No Power Supply Supply power. by tester. Short Circuit between Check for breakage Remove short circuit Wires of insulation. and replace fuse. Short Circuited Wire Measure insulation Remove short circuit to to Ground...
Page 45 TROUBLESHOOTING Alarm Abnormal Transmitting between Inverter and Outdoor PCB1, 3 Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 46 TROUBLESHOOTING Alarm Abnormality of Picking up Phase Signal Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 47 TROUBLESHOOTING Alarm Excessively Low or High Voltage for Inverter (For 5 to 20HP) Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 48 TROUBLESHOOTING Alarm Excessively Low or High Voltage for Inverter (For 24 and 30HP) Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB.
Page 49 TROUBLESHOOTING Alarm Decrease of Discharge Gas Superheat Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No. and alarm code are indicated on the display of the outdoor unit PCB. # In the case that the discharge gas superheat less than 15 deg.
Page 50 TROUBLESHOOTING Action Phenomenon Cause Check Item (Turn OFF Main Switch) Ref. Cycle is Different from Check ref. cycle and Repair wiring. the Electrical System the electrical system. Measure pressure. Correctly charge Overcharged Refrigerant (Refer to Figure in refrigerant. Test Run of TCII.) Check ex.
Page 51 TROUBLESHOOTING Excessively High Discharge Gas Temperature Alarm Code at the Top of Compressor Chamber G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 52 TROUBLESHOOTING Action Phenomenon Cause Check Item (Turn OFF Main Switch) Ref. Cycle is Different from Check ref. cycle and Repair wiring. the Electrical System the electrical system. Correctly charge Shortage of Refrigerant Check pressures. refrigerant. Check ex. valve Replace ex. valve Faulty Ex.
Page 53 TROUBLESHOOTING Alarm Activation of Protection Device for Outdoor Fan Motor Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 54 TROUBLESHOOTING Abnormality of Thermistor for Indoor Unit Inlet Air Temperature Alarm Code (Air Inlet Thermistor) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 55 TROUBLESHOOTING Abnormality of Thermistor for Indoor Unit Discharge Air Temperature Alarm Code (Air Outlet Thermistor) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 56 TROUBLESHOOTING Abnormality of Thermistor for Indoor Unit Heat Exchanger Liquid Alarm Code Refrigerant Pipe Temperature (Freeze Protection Thermistor) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 57 TROUBLESHOOTING Abnormality of Thermistor for Indoor Unit Heat Exchanger Alarm Code Gas Refrigerant Pipe Temperature (Gas Piping Thermistor) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 58 TROUBLESHOOTING Activation of Protection Device for Indoor Fan Motor Alarm Code (RCI-Model) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB.
Page 59 TROUBLESHOOTING Activation of Protection Device for Indoor Fan Motor Alarm Code (except RCI and RPK Model) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 60 TROUBLESHOOTING Activation of Protection Device for Indoor Fan Motor Alarm Code (RPK-Model) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 61 TROUBLESHOOTING Alarm Abnormality of High Pressure Sensor for Outdoor Unit Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 62 TROUBLESHOOTING Abnormality of Thermistor for Outdoor Air Temperature Alarm Code (Outdoor Unit Ambient Thermistor) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 63 TROUBLESHOOTING Abnormality of Thermistor for Discharge Gas Alarm Code Temperature on the Top of Compressor Chamber G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, or the unit No.
Page 64 TROUBLESHOOTING Abnormality of Thermistor for Evaporating Temperature Alarm Code during Heating Operation (Outdoor Unit) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and or the unit No.
Page 65 TROUBLESHOOTING Abnormality of Low Pressure Sensor Alarm Code (Outdoor Unit) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 66 TROUBLESHOOTING Alarm Incorrect Wiring Connection (FX Series Only) Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 67 TROUBLESHOOTING Incorrect Capacity Setting or Combined Capacity Alarm Code between Indoor Units and Outdoor Unit G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 68 TROUBLESHOOTING Alarm Abnormality in Transmitting of Other Indoor Units Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 69 TROUBLESHOOTING Alarm Incorrect Indoor Unit No. Setting Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No. and alarm code are indicated on the display of the outdoor unit PCB. # This alarm code is indicated 3 minutes after power is supplied to the outdoor unit when the indoor unit No.
Page 70 TROUBLESHOOTING Alarm Abnormality of Running Current at Constant Compressor Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 71 TROUBLESHOOTING Action Phenomenon Cause Check Item (Turn OFF Main Switch) Operate within Excessively High or + − 380-415V 10% (50Hz) Low Voltage of + − 380V 10% (60Hz) Power Source + − 220V 10% (60Hz) Excessively Large Running Current of Imbalance Among Adjust voltage between Compressor Motor...
Page 72 TROUBLESHOOTING Alarm Activation to Protect System from Low Compression Ratio Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 73 TROUBLESHOOTING Alarm Activation to Protect System from Excessively Low Suction Pressure Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 74 TROUBLESHOOTING Alarm Activation to Protect System from Excessively High Discharge Pressure Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 75 TROUBLESHOOTING Activation to Protect System from Excessively Low Discharge Pressure Alarm Code (for Protection of Refrigerant Shortage) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 76 TROUBLESHOOTING Activation to Protect System from Excessively Low Suction Pressure Alarm Code (Protection from Vacuum Operation) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 77 TROUBLESHOOTING Alarm Abnormality of Current Transformer (0A Detection) (For 5HP to 20HP) Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 78 TROUBLESHOOTING Alarm Abnormality of Current Transformer (For 24 and 30HP) Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 79 TROUBLESHOOTING Protection Activation Against Instantaneous Overcurrent of Inverter (1) Alarm Code (For 5 to 20HP) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 80 TROUBLESHOOTING Protection Activation Against Instantaneous Overcurrent of Inverter (2) Alarm Code (For 5 to 20HP) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 81 TROUBLESHOOTING Protection Activation Against Instantaneous Overcurrent of Inverter (1) Alarm Code (For 24 and 30HP) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 82 TROUBLESHOOTING Protection Activation Against Instantaneous Overcurrent of Inverter (2) Alarm Code (For 24 and 30HP) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 83 TROUBLESHOOTING Protection Activation of Transistor Module (5 to 20HP) Alarm Code or ISPM (24 and 30HP) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 84 TROUBLESHOOTING Alarm Increase in Inverter Fin Temperature (Only 24 and 30HP) Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 85 TROUBLESHOOTING Abnormality of Fan Motor Protection Alarm (Only 24 and 30HP 220V/60Hz) Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 86 TROUBLESHOOTING Abnormality of AC Chopper Circuit Board Alarm Code (Only for 5 to 20HP & 24, 30HP 380-415/380V 50/60Hz) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
Page 87 TROUBLESHOOTING Alarm Incorrect Wiring Among Indoor Units Code # This alarm code is indicated only when remote control switch PC-2H2 is used being connected to indoor unit. # This alarm occurs in the case of incorrect connection like that T terminal is connected to Vc terminal as below when indoor units are wired.
Page 88 TROUBLESHOOTING Alarm Compressor Protection Code # This alarm code appears when one of the following alarms occurs three times within 6 hours, which may result in serious compressor damages, if the outdoor unit is continuously operated without removing the cause. Alarm Code: Content of Abnormality Tripping of Protection Device in Outdoor Unit...
Page 89: Troubleshooting In Check Mode By Remote Control Switch
TROUBLESHOOTING 1.2.3 Troubleshooting in Check Mode by Remote Control Switch (PC-P1H) G Use the remote control CHECK switch in the following cases. SWING SET TEMP. HIGH ON/OFF TIMER LOUVER (1) When the RUN lamp is flashing. COOL ADDS RN HR HEAT NO FUNCTION UNIT...
Page 90 TROUBLESHOOTING Although the wireless remote controller is used for wall type indoor unit with built-in receiver part, the alarm code can be checked by connecting PC-P1H to the connector (Blue) of the unit as shown below and pressing the operation switch. NOTES: 1.
Page 91 TROUBLESHOOTING Thermo Temp. of Heating Thermo-ON Alarm Remote Control SWING ON/OFF TIMER SET TEMP. HIGH LOUVER Cooling Thermo-ON Operation COOL Switch ADDS RN HR HEAT NO FUNCTION UNIT DEFROST Dark SERVICE FILTER ABNML CENTRAL AUTO VENT H.STRG T. RUN CHECK RUN / STOP TEMP.
Page 92 TROUBLESHOOTING Compressor Pressure/Frequency Indication Discharge Pressure (High) (x 0.1 MPa) Suction Pressure (Low) (x 0.01 MPa) Control Information This is an indication for internal information for the remote control switch. This does not have any specific meaning. Operation The total frequency is indicated when two compressors Frequency (Hz) are running.
Page 93 TROUBLESHOOTING (2) Contents of Check Mode 2 The latest data of the first three indoor units only connected serially are indicated when more than three indoor units are connected to one remote control switch. By pressing the part of “TEMP” switch, the next display is indicated, If the part of “TEMP”...
Page 94 TROUBLESHOOTING Compressor Pressure/Frequency Indication Discharge Pressure (High) (x 0.1 MPa) Suction Pressure (Low) (x 0.01 MPa) Control Information This is an indication for internal information for the remote control switch. This does not have any specific meaning. Operating The total frequency is indicated when plural compressor Frequency (Hz) are running.
Page 95: Troubleshooting By 7-Segment Display
TROUBLESHOOTING 1.2.4 Troubleshooting by 7-Segment Display (1) Checking Method by 7-Segment Display By using the 7-segments and check switch (PSW) on the PCB1 in the outdoor unit, total quantity of combined indoor units, 7-segments operation conditions and each part of refrigeration cycle, can be checked.
Page 96 TROUBLESHOOTING from Previous Page Checking Item PSW3 PSW2 Checking Contents Outdoor Expansion Valve MV3 Opening PSW2 PSW3 (For 24, 30HP) PSW3 PSW2 Outdoor Expansion Valve MVB Opening PSW2 PSW3 (For 24, 30HP) PSW3 PSW2 Discharge Pressure (High) PSW2 PSW3 (MPa) PSW3 PSW2 Suction Pressure...
Page 97 TROUBLESHOOTING from Previous Page Checking Item PSW3 PSW2 Checking Contents Ambient Air Temperature (TO) PSW2 PSW3 : Open-circuited PSW3 PSW2 : Short-circuited Estimated Running Current of Compressor MC1 PSW2 PSW3 Indicates running current of PSW3 PSW2 primary side of inverter. Estimated Running Current of Compressor MC2 PSW2...
Page 98 TROUBLESHOOTING from Previous Page Checking Item PSW3 PSW2 Checking Contents (No.0 Unit) PSW2 PSW3 (No.0 Unit) Indoor Unit Intake Air PSW3 PSW2 Temperature (No.F Unit) (No.F Unit) PSW2 PSW3 (Indicates only the units number connected) PSW3 PSW2 (No.0 Unit) PSW2 PSW3 (No.0 Unit) Indoor Unit...
Page 99 TROUBLESHOOTING from Previous Page Checking Item PSW3 PSW2 Checking Contents Discharge Gas Temp. Decrease Protection 0 : Degeneration Control is PSW2 PSW3 in Operation Degeneration Control 1 : Degeneration Control is not in Operation PSW3 PSW2 Current Protection 0 : Degeneration Control is Degeneration Control PSW2 PSW3...
Page 100 TROUBLESHOOTING (2) Running Current of Compressor G Inverter Primary Current The inverter primary current is estimated from the running current of the compressor MC1 indicated on 7-segments, as chart below. Upper Limit Lower Limit Running Current of Compressor MC1 Indicated on 7- segment G Indicated Running Current of Compressor MC2, MC3, MC4 The running current of the compressor MC2, MC3, MC4 is detected by current sensor.
Page 101 TROUBLESHOOTING G Protection Control Code on 7-Segment Display (a) The protection control indication can be seen on 7-segments when a protection control is activated. (b) The 7-segment continues ON while function is working, and goes out when released. (c) When several protection controls are activated, code number with higher priority will be indicated (see below for the priority order).
Page 102 TROUBLESHOOTING ■ Activating Condition of Protection Control Code For following the conditions as the temperature change, etc., the control of frequency, etc. is performed to prevent the abnormal conditions by the protection control. The activating conditions of protection control are shown in the table below. Code Protection Control Activating Condition...
Page 103 TROUBLESHOOTING NOTES: 1. During protection control (except during alarm stoppage), the protection control code is indicated. 2. The protection control code is indicated during protection control and turns off when canceling the protection control. 3. After retry control, the condition of monitoring is continued for 30 minutes. 4.
Page 104: Function Of Rsw, Dsws And Leds
TROUBLESHOOTING 1.2.5 Function of RSW, DSWs and LEDs (1) Printed Circuit Board in Indoor Unit ( * Following figure shows a separated-board type PCB.) Before Alteration After Alteration RPI (0.8 to 5.0HP) RPF, RPFI RPI (8, 10HP) (a-2) PCN1 CN11 CN17 CN25 PCN4...
Page 105 TROUBLESHOOTING (e-1) (e-2) ■ Dip Switch and LED Functions on Indoor Unit Printed Circuit Board (Dip Switch/ G: With, : Without) Dip Switch Part Contents of Functions Remarks Name e-1 e-2 Setting of Indoor Unit Number DSW2 Setting of Optional Functions A.
Page 106 TROUBLESHOOTING (2) Printed Circuit Board in Outdoor Unit G Arrangement Inside of Main Electrical Box (380-415V/50Hz, 380V/60Hz) RAS-5FSG, RAS-5FS3 Before Manufacturing # U4MV0196 After Manufacturing # U4MV0197 RAS-8~20FSG, RAS-8~20FS3, RAS-8 and 10FXG, RAS-8 and 10FX3 Before Manufacturing # U4NG1001 (FSG/FS3 Series) EF7, EF8, CT3, CMC3, NF11: Only for RAS-16FSG, RAS-16FS3, RAS-20FSG and RAS-20FS3 After Manufacturing # U4NG1002 (FSG/FS3 Series) / From First Production (FXG/ FX3 Series) EF7, EF8, CT3, CMC3, NF11: Only for RAS-16FSG, RAS-16FS3, RAS-20FSG and RAS-20FS3...
Page 107 TROUBLESHOOTING RAS-24FSG1, RAS-24FS5, RAS- 30FSG1 and RAS-30FS5 Electrical Control Box of Outdoor Unit Front Side (For Inverter) Front Side (For Control) CMC1 CMC3 CMC4 ISPM PCB2 PCB1 CMC2 NF10 The Interior of the Electrical Control Box CMC3 CMC4 CMC2 NF10 C2 C3 C4 C5 Inside of Main Electrical Box (220V/60Hz) RAS-5FSG, RAS-5FS3...
Page 108 TROUBLESHOOTING RAS-24FSG1, RAS-24FS5, RAS- 30FSG1 and RAS-30FS5 Electrical Control Box of Outdoor Unit Front Side Front Side EF11 ISPM2 ISPM1 CMC3 CMC4 CMC1 NF10 EF12 CMC2 The Interior of the Electrical Control Box CMC3 CMC4 PCB1 CMC2 G Purpose Symbol Purpose PCB1 for Control...
Page 109 TROUBLESHOOTING a. Control Printed Circuit Board: PCB1 G 5HP to 20HP G 24HP and 30HP 1-99...
Page 110 TROUBLESHOOTING ■ Dip Switches and LED Functions on Outdoor Unit Printed Circuit Boards Name of Internal Part Name Contents of Functions Circuit Board Controlling Board: DSW1 Setting of Outdoor Unit Number PCB1 DSW2 Setting of Capacity Code Outdoor unit capacity is set according to nominal capacity (HP). DSW3 Setting of Height Difference The height difference between outdoor and indoor units is set.
Page 111 TROUBLESHOOTING b. Inverter Printed Circuit Board: PCB3 LED2 DSW1 LED1 • Dip Switch and LED Functions on Outdoor Unit Inverter Printed Circuit Board Switch Name Function DSW1 Normal: No.1 and No.2 of DSW1 are OFF. Emergency Operation or Troubleshooting: No.1 of DSW1 is ON. No.2 of DSW1 is OFF.
Page 112 TROUBLESHOOTING c. “SNUBBER” Board: PCB5 This PCB is applied to the following products only; 1) RAS-5FSG/FS3 380-415V, 50Hz Model and 380V, 60Hz Model (Before Manufacturing # U4MV0196) 2) RAS-8 to 20FSG/FS3 380-415V, 50Hz Model and 380V, 60Hz Model (Before Manufacturing # U4NG1001) LED3 •...
Page 113: Procedure Of Checking Each Main Parts
TROUBLESHOOTING Procedure of Checking Each Main Parts 1.3.1 Self-Checking of PCBs using Remote Control Switch The following troubleshooting procedure is utilized for function test of PCBs in the indoor unit and outdoor unit. RUN/STOP Press Stop Operation HIGH SWING ON/OFF TIMER SET TEMP.
Page 114 TROUBLESHOOTING from previous page In case that there is a second unit. TEMP CHECK <Self-checking Indication of the Next Unit> Press (ex.) Repetition of Self-checking of Unit No. "0". Indication of ADDS. RN Unit No. "1" After 7 Seconds Result After 1 to 5 Seconds After 1 Second Repetition...
Page 115: Self-Checking Of Remote Control Switch
TROUBLESHOOTING 1.3.2 Self-Checking of Remote Control Switch Cases where CHECK switch is utilized. 1. If the remote control switch readouts malfunction. 2. For regular maintenance check. Changing of LCD Indication Indicating Only for Turn ON the power source. LCD Indication Period cancellation (sec.)
Page 116 TROUBLESHOOTING The LCD indication changes as shown below. The detected temperature of remote control thermostat is indicated at the part (A) in the figure below. If the number "- -" or "FF" is indicated at the (A) part, the remote control thermostat is abnormal. In case of depressing the RESET switch or The LCD indication changes as leaving the switches for 15 seconds, the data...
Page 117: Self-Checking Of Indoor Unit Pcb (Except For: Rci, Rcd, Rpi (0.8 To 5.0Hp), Rpc (After Alteration) And Kpi)
TROUBLESHOOTING 1.3.3 Self-Checking of Indoor Unit PCB (Except for: RCI, RCD, RPI (0.8 to 5.0HP), RPC (After Alteration) and KPI) (1) Self-Checking by Relays on Indoor Unit PCB • To Check Abnormality on Indoor Unit PCB due to Malfunction • To check Abnormality on Indoor Unit PCB Based on Results of Checking by CHECK switch on the remote control switch and Self-Checking Function ■...
Page 118 TROUBLESHOOTING (2) Self-Checking Procedures in Check Mode * for RPC (Before Alteration), RPF(I) and RPC (8, 10HP) Check Item State of Mode Confirmation Method (A) Initialize Exp. Valve Exp. Valve fully open => fully close and Auto Louver Auto Louver is horizontally stopped. (B) Analog Test If each thermistor for intake air, discharge air and If FAN operation is...
Page 119: Self-Checking Of 7-Day Timer (Psc-3T)
TROUBLESHOOTING 1.3.4 Self-Checking of 7-Day Timer (PSC-3T) This procedure is utilized for regular maintenance check, and if the 7-day timer is malfunction. Turn ON the main power switch. Checking of LCD and Indicating Circuit: Simultaneously depress the following 4 switches, [HOUR] of "PRESENT TIME" [PRESENT DAY] of "DAY OF WEEK"...
Page 120: Self-Checking Of Central Station (Psc-3S1)
TROUBLESHOOTING 1.3.5 Self-Checking of Central Station (PSC-3S1) This procedure is utilized for regular maintenance check, and if the central station is malfunction. Turn ON the main power switch. Checking of LCD and Indicating Circuit: Simultaneously depress the following 4 switches, [FAN] [COOL] and [ ] of "UNIT".
Page 121: Procedure Of Checking Other Main Parts
TROUBLESHOOTING 1.3.6 Procedure of Checking Other Main Parts (1) High Voltage Discharge Work for Replacing Parts <Perform this high voltage discharge work to avoid an electric shock.> Procedure (a) Turn OFF the main switches and wait for three minutes. Check to ensure that no high voltage exists.
Page 122 TROUBLESHOOTING (2) Checking Procedures Transistor Module (In Case of 5 to 20HP) Outer Appearance and Internal Circuit of Transistor Module [Case 1] [Case 2 and 3] Remove all the terminals of the transistor module before check. If items (a) to (e) are performed and the results are satisfactory, the transistor module is normal. Measure it under 1 kΩ...
Page 123 TROUBLESHOOTING (c) By touching the - side of the tester to the N terminal of transistor module and the + side of tester to U, V and W of transistor module, measure the resistance. If all the resistances are from 1 to 5 kΩ, it is normal. (d) By touching the + side of the tester to the N terminal of transistor module and the - side of tester to U, V and W of transistor module, measure the resistance.
Page 124 TROUBLESHOOTING (c) By touching the - side of the tester to the - terminal of the diode module and the + side of tester to the ~ terminals (3 Nos.) of the diode module, measure the resistance. If all the resistances are from 5 to 50 kΩ, it is normal.
Page 125 TROUBLESHOOTING (c) By touching the - side of the tester to the N terminal PC208 PC207 of ISPM and the + side of tester to R, S and T of CN207 CN206 ISPM, measure the resistance. If all the resistances are more than 100 kΩ, it is normal.
Page 126 TROUBLESHOOTING (g) By touching the - side of the tester to the N terminal of ISPM and the + side of tester to U, V and W of PC208 PC207 ISPM, measure the resistance. If all the resistances CN207 CN206 are more than 100 kΩ, it is normal.
Page 127 TROUBLESHOOTING (l) By touching the + side of the tester to the RB terminal of ISPM and the - side of tester to N terminal of ISPM. PC208 PC207 If the resistance is more than 90 kΩ, it is normal. CN207 CN206 R201...
Page 128 Fan Motor for Indoor Unit BL "1" - "3" R 21.1+10% SF-200-60-4U R "3" - "5" W 32.2+10% at 20 for RPI-0.8FSG1, 1.0FSG1, 1.5FSG1 Fan Motor for Indoor Unit BL "1" - "3" R SF-200-75-4U R "3" - "5" W for RPI-2.0FSG1, 2.5FSG1 Fan Motor for Indoor Unit BL "1"...
Page 129 TROUBLESHOOTING Resistance Name of Parts Model Electrical Wiring Diagram Wiring No. (Ω) Fan Motor for Indoor Unit EHOCM2P4P30 DC Motor for RPK-1.0FSGM,1.5FSGM 2.0FSGM, 2.3FSGM Fan Motor for Indoor Unit BL "1" - "3" R 127.9 TNO-KPPA R "3" - "5" W 102.7 at 20 for RPF-1.0FSG,...
Page 130 TROUBLESHOOTING Resistance Name of Parts Model Electrical Wiring Diagram Wiring No. (Ω) Fan Motor for Outdoor Unit "4" - "1" 8.17 NF4501 "1" - "3" 7.97 160W for RAS-5FSG, RAS-5FS3 Fan Motor for Outdoor Unit "4" - "1" 5.28/6.50 "1" - "3" 4.85/6.91 for RAS-8FSG, RAS-8FS3, NF7001/...
Page 131 KJV-1004 for RCD-1.0FSG1, 1.5FSG1, 2.0FSG1, at 20 2.5FSG1, 3.0FSG1, 4.0FSG1, 5.0FSG1 Drain-up Motor PJD-05230HS at 20 for RPI-0.8FSG1, 1.0FSG1, 1.5FSG1 Solenoid Valve for Gas Bypass 2,018/1,245 ST10PA at 20 for RAS-5FSG, 8FSG, 10FSG, 8FXG, 10FXG (50/60Hz) RAS-5FS3, 8FS3, 10FS3, 8FX3, 10FX3...
Page 132 TROUBLESHOOTING Resistance Name of Parts Model (Ω) Compressor Motor *1.436/1.436/0.395 G402DHV at 20 for RAS-5FSG Compressor Motor *1.436/1.436/0.395 G402DHVM for RAS-8FSG, 10FSG, 16FSG, 20FSG, at 20 8FXG, 10FXG Compressor Motor *3.29/2.68/0.74 G401DHM at 20 for RAS-8FSG, 8FXG Compressor Motor *2.73/2.22/0.572 G501DHM at 20 for RAS-10FSG, 10FXG...
Page 133: Check List On Compressor
TROUBLESHOOTING (7) Checking of Compressor CHECK LIST ON COMPRESSOR CLIENT: MODEL: DATE: Serial No.: Production Date: Checker: Check Item Check Method Result Remarks Are THM8, THM9, THM12 and THM13 (1) Are wires of each thermistor correctly correctly connected? connected by viewing? THM8, THM9, THM12, THM13: (2) Check to ensure that 7-segment Discharge Gas Thermistor...
Page 134 TROUBLESHOOTING Additional Information for “CHECK LIST ON COMPRESSOR” Check Additional Information (Mechanism of Compressor Failure) Item 1 & 2 The liquid refrigerant return volume to the compressor is controlled by the discharge gas temperature Td1 when only No.1 compressor is operating. If Td1 and Td2 are reversely connected, the liquid refrigerant return volume will become small by detecting the temperatures even if the actual discharge gas temperature is high.
Page 135: Test Run
TROUBLESHOOTING Test Run 1.4.1 Test Run Mode by Remote Control Switch (1) Turn ON the power source of the indoor and outdoor units. Counting Number of (2) Set the TEST RUN mode by the remote control switch. Connected Units SET TEMP. HIGH COOL UNIT...
Page 136: Test Run Mode By Outdoor Unit
TROUBLESHOOTING 1.4.2 Test Run Mode by Outdoor Unit The procedure of test run from the outdoor unit side is indicated below. Setting of this dip switch is available with the power source ON. Setting of Dip Switch (Before Shipment) Outdoor Unit Printed Circuit Board (PWB1) DSW4 Switch for Setting of Service Operation and Function...
Page 137: Checking List (Fsg And Fs3 Series)
TROUBLESHOOTING 1.4.3 Checking List (FSG and FS3 Series) CHECK LIST ON TEST OPERATION CLIENT: INSTALLER: DATE: O.U. MODEL: O.U. Serial No.: Checker: I.U. Model I.U. Serial No. I.U. Indoor Unit, O.U.: Outdoor Unit Piping Length: Additional Refrigerant Charge: (1) General Check Item Result Was the dip switch, DSW6 for piping length in O.U.
Page 138 TROUBLESHOOTING (3) Check Item after Sampling Data a. Cooling Operation (It is applicable when outdoor temperature is higher than 15°C.) Check Item Standard Result Causes Is H1 (Compressor Frequency) + Running Horse- Low: Insufficient (CC (Numbers of Running Compressor) -1) power of Indoor Refrigerant X (*) abnormally low or high?
Page 139 TROUBLESHOOTING Heating Operation (It is applicable when outdoor temperature is higher than 0°C.) Check Item Standard Causes Result Is oE1 (O.U. Ex. Valves Opening) abnormally oE1 = 30 to 70% Low: Insufficient low or high when Td - SH is 15 to 30 deg.? Refrigerant High: Excessive Refrigerant...
Page 141: Servicing
SERVICING (2.1 Outdoor Unit) SERVICING Outdoor Unit TURN OFF all power source switches. 2.1.1 Removing Air Intake Grille (1) Remove screws for the air intake grille at the rear side of the unit. (2) Remove the air intake grille by pulling and Tool Phillips Screwdriver unhooking each hook.
Page 142: Removing Front Service Panel
SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. 2.1.2 Removing Front Service Panel Remove five (5) screws per each panel. Slightly lift the panels upward and remove them. Tool Phillips Screwdriver NOTE: When removing screws for front service panel, remove the screw at the lower part of panel firstly. Screw Screw Remove this first.
Page 143: Removing Fan Guard Nets
SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. 2.1.3 Removing Fan Guard Nets Remove four (4) screws per each fan guard net and remove the one. Tool Phillips Screwdriver Screw Fan Guard Net Screw Fan Guard Net Remove this first. RAS-5FSG to RAS-10FSG, RAS-5FS3 to RAS-10FS3, RAS-16FSG, RAS-20FSG,...
Page 144: Removing Outdoor Fan
SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. 2.1.4 Removing Outdoor Fan (1) Remove the fan guard nets according to the item 2.1.3 “Removing Fan Guard Nets”. (2) Remove the fans by removing the cap nuts and flat washers fixing the propeller fans onto the motor shafts.
Page 145 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (3) Removing Wires (a) Remove two (2) screws fixing the electrical box cover and remove the electrical box cover. (b) Disconnect the connectors for the motors in the electrical box. (c) Remove the motors by removing four (4) fixing bolts for the motors.
Page 146: Removing Compressor (Ras-5Fsg And Ras-5Fs3)
SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. 2.1.5 Removing Compressor (RAS-5FSG and RAS-5FS3) G Do not expose the inner refrigeration cycle to the atmosphere for a long period of time when replacing a compressor to protect the cycle from mixing water or foreign particles. If exposed for a long time, seal pipe ends using caps or tape certainly.
Page 147 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (4) Release the lace for the water-proof cover, open the water-proof cover from the front side. NOTE: Remove the water-proof cover in the arrow mark direction as shown by paying attention to the cut part of the water-proof cover in order to avoid any damages.
Page 148 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (6) Remove the heater cover and the spring for the oil heater, and release the oil heater. Remove the spring by expanding the spring as shown. Spring Oil Heater Heater Cover (7) Disconnect the discharge pipe of the compressor.
Page 149 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (8) Disconnect the suction pipe of the compressor. NOTES: 1. Completely wipe off the oil if the oil is spread to the other parts such as the compressor cover, wiring, bottom base, etc. If not, this will cause many problems to the unit. 2.
Page 150: Removing Compressors
SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. 2.1.6 Removing Compressors (RAS-8FSG, RAS-10FSG, RAS-16FSG, RAS-20FSG, RAS-8FS3, RAS-10FS3, RAS-16FS3, RAS-20FS3, RAS-8FXG, RAS-10FXG, RAS-8FX3 and RAS-10FX3) G Do not expose the inner refrigeration cycle to the atmosphere for a long period of time when replacing a compressor to protect the cycle from mixing water or foreign particles.
Page 151 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (4) Release the lace for the water-proof cover, open the water-proof cover from the front side. NOTE: Remove the water-proof cover in the arrow mark direction as shown by paying attention to the cut part of the water-proof cover in order to avoid any damages.
Page 152 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (6) Remove the heater cover and the spring for the oil heater, and release the oil heater. Remove the spring by expanding the spring as shown. Spring Oil Heater Heater Cover (7) Disconnect the discharge pipe of the compressor.
Page 153 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (8) Remove the flare-nut at the compressor side, and disconnect the feeding oil pipe. There is a possibility that the oil may flow from the inside of the feeding oil pipe. Therefore, prepare an oil pan, etc.
Page 154 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (10) Remove three nuts fixing the compressor and remove the compressor. There is no nut at the left rear side. NOTES: 1. Pull out the compressor without removing the oil heater. Remove the oil heater after the compressor is put outside the unit.
Page 155: Removing Compressors For Mc1 And Mc2 (Ras-24Fsg1, Ras-30Fsg1, Ras-24Fs5 And Ras-30Fs5)
SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. 2.1.7 Removing Compressors for MC1 and MC2 (RAS-24FSG1, RAS-30FSG1, RAS-24FS5 and RAS-30FS5) G Do not expose the inner refrigeration cycle to the atmosphere for a long period of time when replacing a compressor to protect the cycle from mixing water or foreign particles.
Page 156 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (5) Release the lace for the water-proof cover, open the water-proof cover from the front side. NOTE: Remove the water-proof cover in the arrow mark direction as shown by paying attention to the cut part of the water-proof cover in order to avoid any damages.
Page 157 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (8) Disconnect the discharge pipe of the compressor. Use two spanners when disassembling the flare-nuts. Tool Adjustable Wrench or Spanner Discharge Pipe Double Spanners (9) Remove the flare-nut at the compressor side, and disconnect the evacuating oil pipe. There is a possibility that the oil may flow from the inside of the evacuating oil pipe.
Page 158 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (10) Remove the suction pipe of the compressor. Tool Adjustable Wrench or Spanner Suction Pipe (11) Remove three nuts fixing the compressor and remove the compressor. There is no nut at the left rear side. NOTES: 1.
Page 159: Removing Compressors For Mc3 And Mc4 (Ras-24Fsg1, Ras-30Fsg1, Ras-24Fs5 And Ras-30Fs5)
SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. 2.1.8 Removing Compressors for MC3 and MC4 (RAS-24FSG1, RAS-30FSG1, RAS-24FS5 and RAS-30FS5) G Do not expose the inner refrigeration cycle to the atmosphere for a long period of time when replacing a compressor to protect the cycle from mixing water or foreign particles.
Page 160 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (3) Remove the electrical box cover according to the item 2.1.15 “Removing Electrical Components”. (4) Disconnect the connectors (CN57 and CN58) of oil heaters. (5) Remove the terminal box cover of the compressor and disconnect the compressor wires. NOTE: Check the terminal No.
Page 161 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (7) Remove Td thermistor on the top of compressor. Td thermistor is inside of the compressor cover. NOTE: The thermostat fixer, holder, thermostat holder and holder for Td thermistor are used again when reassembling.
Page 162 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (9) Draw the compressor and remove it. Check to ensure that the compressor dose not come off the fixing base at this work. NOTE: Do not remove the water-proof cover, oil heater Adjustable Wrench or Spanner, and slide base from the compressor when Tool...
Page 163: Removing High Pressure Switch, High Pressure Sensor And Low Pressure Sensor
SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. 2.1.9 Removing High Pressure Switch, High Pressure Sensor and Low Pressure Sensor (1) Remove the front service panel according to item 2.1.2 “Removing Front Service Panel”. (2) Collect all refrigerant from the low pressure side check joint when the high pressure switch is removed.
Page 164 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. A-1. Removing High Pressure Switch (RAS-5FSG, RAS-8FSG, RAS-10FSG, RAS-5FS3, RAS-8FS3, RAS-10FS3, RAS-8FXG, RAS-10FXG, RAS-8FX3 and RAS-10FX3) (1) Disconnect the faston terminals. (2) Remove the high pressure switch from the brazing part of the discharge pipe by a burner. NOTE: Do not expose the refrigeration cycle to the atmosphere for a long period to avoid mixing of water and foreign particles into the refrigeration cycle.
Page 165 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. B. Removing High Pressure Sensor and Low Pressure Sensor (1) Remove the water-proof caps. NOTE: The water-proof caps are used after replacing pressure sensors. (2) Remove the pipe of the high pressure sensor or low pressure sensor using two spanners. Firstly, remove the check joint at the main pipe side as shown figure in 2.1.9.
Page 166: Removing Coil For Reversing Valve Coil
SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. 2.1.10 Removing Coil for Reversing Valve Coil Do not touch the electrical parts when the LED3 (Red) on the SNUBBER PCB (PCB5) or the LED2 (Red) on the Inverter PCB (PCB3) is lit, since the voltage is higher than 50V. (1) Remove the front service panel according to the item 2.1.2 “Removing Front Service Panel”.
Page 167: Removing Coil For Solenoid Valve Coil
SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. 2.1.11 Removing Coil for Solenoid Valve Coil Do not touch the electrical parts when the LED3 (Red) on the SNUBBER PCB (PCB5) or the LED2 (Red) on the Inverter PCB (PCB3) is lit, since the voltage is higher than 50V. (1) Remove the front service panel according to the item 2.1.2 “Removing Front Service Panel”.
Page 168: Removing Thermistor For Liquid Pipe
SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. 2.1.12 Removing Thermistor for Liquid Pipe Do not touch the electrical parts when the LED3 (Red) on the SNUBBER PCB (PCB5) or the LED2 (Red) on the Inverter PCB (PCB3) is lit, since the voltage is higher than 50V. (1) Remove the front service panel according to the item 2.1.2 “Removing Front Service Panel”.
Page 169: Removing Reversing Valve (Ras-24Fsg1, Ras-30Fsg1, Ras-24Fs5 And Ras-30Fs5)
SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. 2.1.13 Removing Reversing Valve (RAS-5FSG, RAS-8FSG, RAS-10FSG, RAS-16FSG, RAS-20FSG, RAS-5FS3, RAS-8FS3, RAS-10FS3, RAS-16FS3, RAS-20FS3, RAS-8FXG, RAS-10FXG, RAS-8FX3 and RAS-10FX3) Before starting this work, collect refrigerant into a cylinder from the cycle and turn off all power source switches.
Page 170 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. 2.1.14 Removing Reversing Valve (RAS-24FSG1, RAS-30FSG1, RAS-24FS5 and RAS-30FS5) Before starting this work, collect refrigerant into a cylinder from the cycle and turn off all power source switches. (1) Remove the front service panel according to the item 2.1.2 “Removing Front Service Panel”. (2) Remove the electrical box cover according to the item 2.1.15 “Removing Electrical Components”.
Page 171: Removing Electrical Components (Ras-24Fsg1, Ras-30Fsg1, Ras-24Fs5 And Ras-30Fs5)
SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. 2.1.15 Removing Electrical Components (RAS-5FSG, RAS-8FSG, RAS-10FSG, RAS-16FSG, RAS-20FSG, RAS-5FS3, RAS-8FS3, RAS-10FS3, RAS-16FS3, RAS-20FS3, RAS-8FXG, RAS-10FXG, RAS-8FX3 and RAS-10FX3) Do not touch the electrical parts when the LED3 (Red) on the SNUBBER PCB (PCB5) or the LED2 (Red) on the Inverter PCB (PCB3) is lit, since the voltage is higher than 50V.
Page 172 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (2) Others Other parts located at the rear side of PCB mounting plate and AC chopper mounting plate should be replaced as follows. (a) Remove two (2) screws fixing the mounting plate for the PCB and turn the plate towards the front side.
Page 173 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. 2.1.16 Removing Electrical Components (RAS-24FSG1, RAS-30FSG1, RAS-24FS5 and RAS-30FS5) Do not touch the electrical parts when the LED201 (Red) on the ISPM(1) is lit, since the voltage is higher than 50V. 1.
Page 174 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (2) Removing PCB (Electrical Box for Control) Before this work, remove the right side front cover according to the item 2.1.2 “Removing Front Service Panel”. (a) Disconnect the connectors connected to the PCB and clamp the middle portion of the holder by pinchers and pull it out.
Page 175 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (4) Removing Other Before this work, remove the center front panel cover according to the item 2.1.2 “Removing Front Service Panel”. (a) Disconnect the cables connected to each electrical part. (b) Remove screws for the electrical parts mounting.
Page 176 SERVICING (2.1 Outdoor Unit) TURN OFF all power source switches. (6) Removing ISPM2 (In the case of 220V/60Hz) Before this work, remove the service cover panel according to the item 2.1.2 “Removing Front Service Panel”. (a) Loosen two (2) screws fixing the inverter electrical box cover and remove it. NOTE: Do not remove screws for the inverter electrical box cover so that it does not fall off.
Page 177: In-The-Ceiling Type (Rpi-0.8Fsg1 To Rpi-5.0Fsg1)
SERVICING (2.2 In-the-Ceiling Type) In-the-Ceiling Type (RPI-0.8FSG1 to RPI-5.0FSG1) TURN OFF all power source switches. 2.2.1 Removing Long Life Filter The air intake grilles are field-supplied. Therefore, there is a case that the replacement of the long life filter is not easily performed depending on the installation manners.
Page 178 PCB holders by a long-nose plier and pull out the PCB. (3) Remove three (3) M4 screws and remove the AC chopper module PCB. Tool Phillips Screwdriver, Long-nose Pliers G RPI-0.8FSG1 to RPI-2.5FSG1 Before Minor Change After Minor Change Connector for Connector for...
Page 179: Removing Indoor Fan And Fan Motor
SERVICING (2.2 In-the-Ceiling Type) TURN OFF all power source switches. 2.2.3 Removing Indoor Fan and Fan Motor The indoor fan and the fan motor for RPI-0.8 to 2.5FSG1 can be removed only from the bottom side. The indoor fan and the fan motor for RPI-3.0 to 5.0FSG1 can be removed from the side (electrical box side) and the bottom side.
Page 180 SERVICING (2.2 In-the-Ceiling Type) TURN OFF all power source switches. (4) Remove the electrical box and the fan motor assembly can be seen. Remove the wires fixed by the wire clamp on the fan motor fixing plate. Tool Phillips Screwdriver Wire Wire Clamp (5) Remove four (4) M4 screws fixing the casing at the side of the casing and remove the ring of the...
Page 181 SERVICING (2.2 In-the-Ceiling Type) TURN OFF all power source switches. (7) Remove four (4) screws fixing the casing onto the motor fixing plate and pull out the casing. When pulling out the casing, turn the casing by an angle of 180°. Tool Phillips Screwdriver M4 Screws...
Page 182 SERVICING (2.2 In-the-Ceiling Type) TURN OFF all power source switches. (9) Remove two (2) lower M6 screws fixing the motor base and loosen the upper two (2) M6 screws. (10) Remove four (4) M4 screws fixing the ring of the casing at the rear side of the fan motor and remove the motor base, the ring and the runner at the same time.
Page 183 SERVICING (2.2 In-the-Ceiling Type) TURN OFF all power source switches. < Removing Indoor Fan and Fan Motor from Bottom Side (For All Models)> Disconnect the connector for the fan motor wires according to the procedures (1) and (2) in page 2-39. (3) Remove the lower M4 screws (Q’ty: A) fixing the suction flange.
Page 184 SERVICING (2.2 In-the-Ceiling Type) TURN OFF all power source switches. (5) Remove the lower cover and the fan assembly can be seen. Remove the wires for the motor fixed by the cord clamp of the fan motor fixing plate. G For RPI-3.0FSG1 to RPI-5.0FSG1 (6) Remove eight (8) M4 screws fixing the casing onto the fan fixing plate and move the casing slightly.
Page 185 (2.2 In-the-Ceiling Type) TURN OFF all power source switches. G For RPI-0.8FSG1 to RPI-2.5FSG1 (6) Remove the lower M4 screws (Q’ty: C) fixing the casing onto the fan fixing plate, push the hooks at both sides of the casing and remove the lower part of the casing.
Page 186: Removing Thermistor For Liquid Piping And Gas Piping
SERVICING (2.2 In-the-Ceiling Type) TURN OFF all power source switches. 2.2.4 Removing Thermistor for Liquid Piping and Gas Piping (1) Remove eight (8) M4 screws fixing the service cover and remove the service cover. Tool Phillips Screwdriver Screws (M4 x 8) Service Cover (2) Remove the cork tape, pipe insulations and the thermistor holder, the thermistors for pipes can be removed.
Page 187: Removing Electronic Expansion Valve Coil
SERVICING (2.2 In-the-Ceiling Type) TURN OFF all power source switches. 2.2.5 Removing Electronic Expansion Valve Coil (1) Remove the service cover according to the item 2.2.4 “Removing Thermistor for Liquid Piping and Gas Piping”. (2) The following procedures are the same Tool Phillips Screwdriver with other models.
Page 188: Removing Drain Pump
SERVICING (2.2 In-the-Ceiling Type) TURN OFF all power source switches. 2.2.7 Removing Drain Pump In case of the units with the drain pump (RPI-0.8 to 1.5FSG1), the drain pump is fixed on the service cover. Remove the fixing screws and remove the drain pump. Tool Phillips Screwdriver, Spanner Drain Connection...
Page 189: Removing Drain Pan
SERVICING (2.2 In-the-Ceiling Type) TURN OFF all power source switches. 2.2.8 Removing Drain Pan (1) Remove the lower M4 screws (Q’ty: A) fixing the suction flange. * Q’ty of Screws (A): 2 (For RPI-0.8 to 1.5FSG1) 3 (For RPI-2.0 to 4.0FSG1) 4 (For RPI-5.0FSG1) Tool Phillips Screwdriver...
Page 190 SERVICING (2.2 In-the-Ceiling Type) TURN OFF all power source switches. (3) Remove the lower M4 screws (Q’ty: D) fixing the discharge flange. * Q’ty of Screws (D): 2 (For RPI-0.8 to 1.5FSG1) 3 (For RPI-2.0 to 4.0FSG1) Tool Phillips Screwdriver 4 (For RPI-5.0FSG1) Discharge Flange Screws (M4xD)
Page 191: In-The-Ceiling Type (Rpi-8Fsg1 And Rpi-10Fsg1)
SERVICING (2.3 In-the-Ceiling Type) In-the-Ceiling Type (RPI-8FSG1 and RPI-10FSG1) TURN OFF all power source switches. 2.3.1 Removing Long Life Filter The air intake grilles are field-supplied. Therefore, there is a case that the replacement of the long life filter is not easily performed depending on the installation manners. Check it carefully.
Page 192: Removing Indoor Fan And Fan Motor
SERVICING (2.3 In-the-Ceiling Type) TURN OFF all power source switches. 2.3.3 Removing Indoor Fan and Fan Motor (1) Remove the electrical box cover according to the item 2.3.2 “Removing Printed Circuit Board (PCB)”. (2) Remove four (4) screws fixing the electrical box plate and remove the electrical box plate. (3) Disconnect the connector for the fan motor.
Page 193 SERVICING (2.3 In-the-Ceiling Type) TURN OFF all power source switches. (8) Remove three (3) screws fixing the ring onto the Tool Phillips Screwdriver rear side fan casing and remove the ring. Fan Casing Ring Ring Fixing Screws (9) Remove four (4) screws fixing the motor base. (10) Pull out the fan motor with motor base.
Page 194: Removing Electronic Expansion Valve And Thermistors
SERVICING (2.3 In-the-Ceiling Type) TURN OFF all power source switches. 2.3.4 Removing Electronic Expansion Valve and Thermistors (1) Remove three (3) screws fixing the heat exchanger cover and remove the heat exchanger cover. (2) Remove four (4) screws fixing the maintenance Tool Phillips Screwdriver cover and remove the maintenance cover.
Page 195: 4-Way Cassette Type
SERVICING (2.4 4-Way Cassette Type) 4-Way Cassette Type TURN OFF all power source switches. 2.4.1 Removing Long Life Filter (1) The long life filter is located inside of the air intake grille. Detach the filter after opening the air intake grille.
Page 196: Removing Electrical Box Cover
SERVICING (2.4 4-Way Cassette Type) TURN OFF all power source switches. 2.4.3 Removing Electrical Box Cover By opening the air intake grille, the electrical box can be seen. Remove two (2) screws fixing the electrical box cover and remove the cover. Tool Phillips Screwdriver Electrical...
Page 197: Removing Fan Runner And Fan Motor
SERVICING (2.4 4-Way Cassette Type) TURN OFF all power source switches. (2) Remove the air intake grille from the optional air panel. (3) Remove the four (4) corner pockets as below. Insert slotted screwdriver or coin into the slot of corner pocket and unhook the hook of corner pocket in number order of 1 to 4.
Page 198: Removing Bell-Mouth
SERVICING (2.4 4-Way Cassette Type) TURN OFF all power source switches. 2.4.6 Removing Bell-Mouth (1) Remove three (3) screws fixing the bell-mouth onto the drain pan and remove the bell-mouth. (2) Remove nut and washer fixing the runner and remove the runner. (3) Remove the earth wire for the fan motor.
Page 199: Removing Printed Circuit Board (Pcb)
SERVICING (2.4 4-Way Cassette Type) TURN OFF all power source switches. 2.4.7 Removing Printed Circuit Board (PCB) (1) Remove the air intake grille according to the item 2.4.2 “Removing Air Intake Grille”. (2) Remove the electrical box cover according to the item 2.4.3 “Removing Electrical Box Cover”. (3) Disconnect the all wiring connectors of the PCBs.
Page 200: Removing Drain Pan
SERVICING (2.4 4-Way Cassette Type) TURN OFF all power source switches. 2.4.8 Removing Drain Pan (1) Remove the optional air panel according to the item 2.4.4 “Removing Optional Air Panel”. (2) Remove the electrical box cover according to the item 2.4.3 “Removing Electrical Box Cover”. Disconnect the connectors of the air outlet thermistor, piping thermistors (2), electronic expansion valve, drain pump, float switch and fan motor.
Page 201: Removing Drain-Up Mechanism
SERVICING (2.4 4-Way Cassette Type) TURN OFF all power source switches. 2.4.9 Removing Drain-Up Mechanism (1) Remove the drain pan according to the item 2.4.8 “Removing Drain Pan”. (2) Remove the hose band and remove the drain hose. (3) Remove screw of earth wiring. (4) Hold the drain-up mechanism and remove three (3) screws of the fixing plate for the drain-up mechanism.
Page 202: Removing Thermistors For Liquid Pipe And Gas Pipe
SERVICING (2.4 4-Way Cassette Type) TURN OFF all power source switches. 2.4.11 Removing Thermistors for Liquid Pipe and Gas Pipe (1) Remove the optional air panel according to the item 2.4.4 “Removing Optional Air Panel”. (2) Remove the bell-mouth according to No.3 of the item 2.4.5 “Removing Fan Runner and Fan Motor”. (3) Remove the drain pan according to the item 2.4.8 “Removing Drain Pan”.
Page 203: Removing Electronic Expansion Valve Coil
SERVICING (2.4 4-Way Cassette Type) TURN OFF all power source switches. 2.4.12 Removing Electronic Expansion Valve Coil (1) Remove the optional air panel according to the item 2.4.4 “Removing Optional Air Panel”. (2) Remove the bell-mouth according to No.3 of item 2.4.5 “Removing Fan Runner and Fan Motor”. (3) Remove the drain pan according to the item 2.4.8 “Removing Drain Pan”.
Page 204 SERVICING (2.4 4-Way Cassette Type) TURN OFF all power source switches. (9) Tighten the lock nut with spanner after tightening lightly by hand. The tightening torque shall be within the range of 12Nm (120kg-cm) to 15Nm (150kg-cm). NOTE: Do not apply the strong forces such as the rotating torque and the bending load to the motor by holding the motor by hand when tightening the lock nut.
Page 205: Removing Automatic Louver Motor
SERVICING (2.4 4-Way Cassette Type) TURN OFF all power source switches. 2.4.13 Removing Automatic Louver Motor (1) Remove the optional air panel according to the item 2.4.4 “Removing Optional Air Panel”. (2) Remove the motor cover after removing one (1) screw fixing the motor cover for the automatic louver motor.
Page 206: 2-Way Cassette Type
SERVICING (2.5 2-Way Cassette Type) 2-Way Cassette Type TURN OFF all power source switches. 2.5.1 Removing Long Life Filter and Air Intake Grille (1) The long life filter is located inside of the air intake grille. The air intake grille can be opened by pushing the knob as shown below.
Page 207: Removing Optional Air Panel
SERVICING (2.5 2-Way Cassette Type) TURN OFF all power source switches. 2.5.3 Removing Optional Air Panel (1) Remove the electrical box cover by opening the air intake grille. Disconnect the connector (CN17) for the auto-louver on the indoor PCB. (2) Remove the air intake grille from the optional air panel. Remove four (4) screws fixing the optional air panel.
Page 208: Removing Fan Runner And Fan Motor
SERVICING (2.5 2-Way Cassette Type) TURN OFF all power source switches. 2.5.4 Removing Fan Runner and Fan Motor (1) Remove the optional air panel according to the item 2.5.3 “Removing Optional Air Panel”. (2) Removing Electrical Box (a) Disconnect the connectors for each wire. (b) Remove two (2) screws fixing the electrical box and turn the electrical box downwards by approximately 90.
Page 209 SERVICING (2.5 2-Way Cassette Type) TURN OFF all power source switches. (4) Remove the fan runner and the fan motor. Remove the fan runner after removing the cap nut and the washer fixing the fan runner. (a) Disconnect the earth wire for the fan motor. (b) Remove four (4) nuts fixing the fan motor and remove the fan motor.
Page 210: Removing Printed Circuit Board (Pcb)
SERVICING (2.5 2-Way Cassette Type) TURN OFF all power source switches. 2.5.5 Removing Printed Circuit Board (PCB) (1) Remove the air intake grille according to the item 2.5.1 “Removing Long Life Filter and Air Intake Grille”. (2) Remove the electrical box cover according to the item 2.5.2 “Removing Electrical Box Cover”. (3) Pull out the PCB by pinching the expanded part of the PCB holders (holding PCB at four (4) positions) by long-nose plier.
Page 211: Removing Float Switch
SERVICING (2.5 2-Way Cassette Type) TURN OFF all power source switches. 2.5.6 Removing Float Switch (1) Remove the air intake grille according to the item 2.5.1 “Removing Long Life Filter and Air Intake Grille”. (2) Remove the bell-mouth according to the item 2.5.4 “Removing Fan Runner and Fan Motor”. (3) Remove the cover after removing two (2) fixing screws for the cover of the service access hole near the pipes inside the unit.
Page 212: Removing Drain-Up Mechanism
SERVICING (2.5 2-Way Cassette Type) TURN OFF all power source switches. 2.5.7 Removing Drain-Up Mechanism (1) Remove the air intake grille according to the item 2.5.1 “Removing Long Life Filter and Air Intake Grille”. (2) Remove the bell-mouth according to the item 2.5.4 “Removing Fan Runner and Fan Motor”. (3) Remove the drain pan according to the item 2.5.8 “Removing Drain Pan”.
Page 213: Removing Drain Pan
SERVICING (2.5 2-Way Cassette Type) TURN OFF all power source switches. 2.5.8 Removing Drain Pan (1) Remove the air intake grille according to the item 2.5.1 “Removing Long Life Filter and Air Intake Grille”. (2) Open the electrical box cover according to the item 2.5.2 “Removing Electrical Box Cover”. Disconnect the connecting wire between indoor unit and outdoor unit, electrical wiring for the electrical box and the connectors inside of the electrical box.
Page 214: Removing Thermistors For Liquid And Gas Pipes
SERVICING (2.5 2-Way Cassette Type) TURN OFF all power source switches. 2.5.9 Removing Thermistors for Liquid and Gas Pipes (1) Remove the optional air panel according to the item 2.5.3 “Removing Optional Air Panel”. (2) Remove the bell-mouth according to the item 2.5.4 “Removing Fan Runner and Fan Motor”. (3) Remove the drain pan according to the item 2.5.8 “Removing Drain Pan”.
Page 215: Removing Electronic Expansion Valve Coil
SERVICING (2.5 2-Way Cassette Type) TURN OFF all power source switches. 2.5.10 Removing Electronic Expansion Valve Coil (1) Remove the optional air panel according to the item 2.5.3 “Removing Optional Air Panel”. (2) Remove the fan assembly according to the item 2.5.4 “Removing Fan Runner and Fan Motor”. (3) Remove the drain pan according to the item 2.5.8 “Removing Drain Pan”.
Page 216 SERVICING (2.5 2-Way Cassette Type) TURN OFF all power source switches. (9) Tighten the lock nut with spanner after tightening lightly by hand. The tightening torque shall be within the range of 12Nm (120kg-cm) to 15Nm (150kg-cm). NOTE: Do not apply the strong forces such as the rotating torque and the bending load to the motor by holding the motor by hand when tightening the lock nut.
Page 217: Removing Automatic Louver Motor
SERVICING (2.5 2-Way Cassette Type) TURN OFF all power source switches. 2.5.11 Removing Automatic Louver Motor (1) Remove the optional air panel according to the item 2.5.3 “Removing Optional Air Panel”. (2) Remove the insulation mounted with adhesive at the both sides of the C cover assembly. Tool Phillips Screwdriver Insulation...
Page 218 SERVICING (2.5 2-Way Cassette Type) TURN OFF all power source switches. (4) Remove two (2) screws fixing the motor assembly and remove two (2) stoppers by lifting the motor assembly upwards (to the arrow direction) by hand. The stopper can be removed by pulling. The motor assembly can be removed by removing the connector at the same time.
Page 219: Wall Type
SERVICING (2.6 Wall Type) Wall Type TURN OFF all power source switches. 2.6.1 Removing Air Filter (1) Press 2 portions (right and left) of the air intake grille as shown below. (2) Slowly pull the lower side of the air intake grille toward the front side. Air Intake Grille (3) Lift up the air filter, detach the hooks and draw the air filter downward.
Page 220: Removing Front Panel
SERVICING (2.6 Wall Type) TURN OFF all power source switches. 2.6.2 Removing Front Panel (1) Press the “PUSH” marks at both ends of the front panel and open the suction grille by pulling toward the front side. (2) Remove one (1) screws at the center of the front panel. After removing the screw, close the front panel once.
Page 221 SERVICING (2.6 Wall Type) TURN OFF all power source switches. (8) There are three (3) catches at the inner side of the front panel. Press the catch part from the front side and check to ensure that there is no gap between the front panel and the unit body. NOTE: If the gap exists between the front panel and the air outlet, it may cause air leakage and dewing may occur at the front panel and the dew may drop.
Page 222: Removing Motor For Automatic Louver
SERVICING (2.6 Wall Type) TURN OFF all power source switches. 2.6.3 Removing Motor for Automatic Louver (1) Remove the front panel according to the item 2.6.2 “Removing Front Panel”. (2) Remove the electrical box according to the item 2.6.5 “Removing Electrical Box Cover”. (3) Remove four screws fixing the AS motor.
Page 223: Removing Thermistors For Liquid Pipe, Gas Pipe, Discharge Air And Suction Air
SERVICING (2.6 Wall Type) TURN OFF all power source switches. 2.6.4 Removing Thermistors for Liquid Pipe, Gas Pipe, Discharge Air and Suction Air (1) Remove the front panel according to the item 2.6.2 “Removing Front Panel”. (2) Remove the electrical box according to the item 2.6.5 “Removing Electrical Box Cover”. (3) Removing Thermistor for Liquid Pipe Remove the butyl sheet protecting the thermistor for liquid pipe and remove the thermistor from the holder.
Page 224 SERVICING (2.6 Wall Type) TURN OFF all power source switches. (5) Removing Thermistor for Discharge Air Remove the thermistor for discharge air from the holder of the vertical louver and the hook at the right side of the air outlet. Vertical Louver Vertical Louver Holder...
Page 225: Removing Electrical Box Cover
SERVICING (2.6 Wall Type) TURN OFF all power source switches. 2.6.5 Removing Electrical Box Cover (1) Remove the front panel according to the item 2.6.2 “Removing Front Panel”. (2) Remove one (1) screw for the electrical box cover. (3) Remove the power source wiring and wiring connection between indoor unit and outdoor unit. Tool Phillips Screwdriver Connector for Remote...
Page 226: Removing Indoor Pcb
SERVICING (2.6 Wall Type) TURN OFF all power source switches. 2.6.6 Removing Indoor PCB (1) Remove the front panel according to the item 2.6.2 “Removing Front Panel”. (2) Remove one (1) screw for the electrical box cover. (3) Remove the connectors (CN17, CN22 and CN11) from the low voltage PCB. (4) Detach two (2) catches of the PCB base 1 fixing the low voltage PCB, lift the low voltage PCB and remove other connectors still connected.
Page 227: Removing Drain Pan
SERVICING (2.6 Wall Type) TURN OFF all power source switches. 2.6.7 Removing Drain Pan (1) Remove the front panel according to the item 2.6.2 “Removing Front Panel”. (2) Remove the electrical box according to the item 2.6.5 “Removing Electrical Box Cover”. (3) Remove the drain pan from the unit by releasing the catches (A) and (B) from the left side of the drain pan, and releasing the catch (C) by pulling the right side of the air panel toward the front side.
Page 228: Removing Heat Exchanger
SERVICING (2.6 Wall Type) TURN OFF all power source switches. 2.6.8 Removing Heat Exchanger (1) Remove the front panel according to the item 2.6.2 “Removing Front Panel”. (2) Remove the electrical box according to the item 2.6.5 “Removing Electrical Box Cover”. (3) Remove the drain pan according to the item 2.6.7 “Removing Drain Pan”.
Page 229 SERVICING (2.6 Wall Type) TURN OFF all power source switches. (6) Remove one screw fixing the heat exchanger and release the catch holding the right side of the heat exchanger. Tool Phillips Screwdriver Release Catch Screw (7) Lift up the heat exchanger, draw out the rear piping of the heat exchanger from the square hole by pulling the upper part of the heat exchanger forward and remove the heat exchanger.
Page 230: Removing Fan And Fan Motor
SERVICING (2.6 Wall Type) TURN OFF all power source switches. 2.6.9 Removing Fan and Fan Motor (1) Remove the heat exchanger according to the item 2.6.5 “Removing Heat Exchanger”. (2) Remove the supporting plate for the bearing by pushing the knobs at both sides of the supporting plate toward the inside and releasing the catches.
Page 231 SERVICING (2.6 Wall Type) TURN OFF all power source switches. (5) Draw the fan leftward with lifting up the bearing side of the fan slightly, the fan and the fan motor are removed. Tool Phillips Screwdriver Lift up the fan and draw it leftward. Fan Motor Loosen Screw (6) For attaching the fan motor and the fan, perform the reverse procedures for removing.
Page 232: Removing Electronic Expansion Valve Coil
SERVICING (2.6 Wall Type) TURN OFF all power source switches. 2.6.10 Removing Electronic Expansion Valve Coil (1) Remove the front panel according to the item 2.6.2 “Removing Front Panel”. (2) Remove the electrical box according to the item 2.6.5 “Removing Electrical Box Cover”. (3) The butyl sheet is adhered around the piping of the heat exchanger, electronic expansion valve and the inlet and outlet piping of the electronic expansion valve.
Page 233 SERVICING (2.6 Wall Type) TURN OFF all power source switches. (9) Tighten the lock nut with spanner after tightening lightly by hand. The tightening torque shall be within the range of 12Nm (120kg-cm) to 15Nm (150kg-cm). NOTE: Do not apply the strong forces such as the rotating torque and the bending load to the motor by holding the motor by hand when tightening the lock nut.
Page 234: Floor Type
SERVICING (2.7 Floor Type) Floor Type TURN OFF all power source switches. 2.7.1 Removing Air Intake Grille (1) Loosen the screws for fixing plate at the right side of each air intake grille, and move the fixing plates. (2) By pushing the knob at both sides of the air intake grille towards the arrow mark direction, the grille can be opened with an angle 30°.
Page 235: Removing Discharge Air Grille
SERVICING (2.7 Floor Type) TURN OFF all power source switches. 2.7.3 Removing Discharge Air Grille (1) The discharge air grilles are mounted on the top by using a guide-rail. (2) By opening the top cover and sliding the discharge air grilles, the grilles can be removed. Fixing Plate Top Cover Discharge Air Grille...
Page 236: Removing Fan Motor
SERVICING (2.7 Floor Type) TURN OFF all power source switches. 2.7.5 Removing Fan Motor (1) Remove the air intake grille according to the item 2.7.1 “Removing Air Intake Grille”. (2) Remove the air filter according to the item 2.7.2 “Removing Air filter”. (3) Remove the front cover according to the item 2.7.4 “Removing Front Cover”.
Page 237 SERVICING (2.7 Floor Type) TURN OFF all power source switches. (6) Remove the casing “1” by pushing the catch part Tool Phillips Screwdriver at four positions towards the inner side. "1" Catch Casing (7) Loosen the screw by a hexagon wrench. Tool Hexagon Wrench Motor...
Page 238: Removing Printed Circuit Board (Pcb)
SERVICING (2.7 Floor Type) TURN OFF all power source switches. 2.7.6 Removing Printed Circuit Board (PCB) (1) Remove the air intake grille according to the item 2.7.1 “Removing Air Intake Grille”. (2) Remove the air filter according to the item 2.7.2 “Removing Air Filter”. (3) Remove the front cover according to the item 2.7.4 “Removing Front Cover”.
Page 239 SERVICING (2.7 Floor Type) TURN OFF all power source switches. (6) The electrical box can be turned up to an angle of 90° by removing two fixing screws and unhooking the catch at the rear side of the electrical box. (7) The PCB is supported by four holders.
Page 240: Removing Thermistors For Liquid Pipe And Gas Pipe
SERVICING (2.7 Floor Type) TURN OFF all power source switches. 2.7.7 Removing Thermistors for Liquid Pipe and Gas Pipe (1) Remove the air intake grille according to the item 2.7.1 “Removing Air Intake Grille”. (2) Remove the air filter according to the item 2.7.2 “Removing Air Filter”. (3) Remove the front cover according to the item 2.7.4 “Removing Front Cover”.
Page 241 SERVICING (2.7 Floor Type) TURN OFF all power source switches. (6) Remove CORK TAPE and pull out the thermistor after removing the fixing plate for the thermistors. Thermistor for Gas Pipe Cork Tape Liquid Pipe Thermistor Pipe Thermistor Holder 2-101...
Page 242: Floor Concealed Type
SERVICING (2.8 Floor Concealed Type) Floor Concealed Type TURN OFF all power source switches. 2.8.1 Removing Air Filter (1) The air filter is located at the inner upper part of the inlet. (2) Remove the air filter by pulling the center knob and bending the filter. Air Filter 2.8.2 Removing Front Covers (1) Remove the air filter according to the item 2.8.1 “Removing Air Filter”.
Page 243: Removing Fan Motor
SERVICING (2.8 Floor Concealed Type) TURN OFF all power source switches. (3) Remove the front upper cover after removing eleven (11) fixing screws. Tool Phillips Screwdriver Screws Front Upper Cover 2.8.3 Removing Fan Motor (1) Remove the air filter according to the item 2.8.1 “Removing Air Filter”. (2) Remove the front covers according to the item 2.8.2 “Removing Front Covers”.
Page 244: Ceiling Type
SERVICING (2.9 Ceiling Type) Ceiling Type TURN OFF all power source switches. 2.9.1 Removing Air Filter and Air Intake Grille The air filter is located inside of the air intake grille. Remove the air filter after opening the air intake grilles. (1) Slide the catches on both sides of the air intake grille backwards.
Page 245: Removing Discharge Air Grille
SERVICING (2.9 Ceiling Type) TURN OFF all power source switches. 2.9.3 Removing Discharge Air Grille (1) Remove the side covers according to the item 2.9.2 “Removing Side Cover”. (2) Remove the screw connecting the AS motor assembly and the discharge air grille, and remove the stopper.
Page 246: Removing Fan Motor
SERVICING (2.9 Ceiling Type) TURN OFF all power source switches. 2.9.4 Removing Fan Motor (1) Open the air intake grille according to the item 2.9.1 “Removing Air Filter and Air Intake Grille”. (2) Hook the electrical box on the lower frame after removing the screws fixing the electrical box. Tool Phillips Screwdriver Electrical Box...
Page 247 SERVICING (2.9 Ceiling Type) TURN OFF all power source switches. (4) Remove the casing “1” by pushing the catch part Tool Phillips Screwdriver at four positions towards the inner side. "1" Catch Casing (5) Loosen the screw for the coupling by Tool Hexagon Wrench a hexagon wrench.
Page 248: Removing Bearing
SERVICING (2.9 Ceiling Type) TURN OFF all power source switches. 2.9.5 Removing Bearing (1) Open the air intake grille according to the item 2.9.1 “Removing Air Filter and Air Intake Grille”. (2) Remove the lower part of the casing according to the item 2.9.4 “Removing Fan Motor”. (3) Loosen one (1) screw for the coupling by a hexagon wrench according to the item 2.9.4 “Removing Fan Motor”.
Page 249: Removing Automatic Louver Motor
SERVICING (2.9 Ceiling Type) TURN OFF all power source switches. 2.9.7 Removing Automatic Louver Motor (1) Remove the right side cover according to the item 2.9.2 “Removing Side Cover”. (2) Remove the M4 screws and remove the AS motor assembly from the right shaft of the discharge air grille.
Page 250: Checking Procedures For Electronic Expansion Valve Coil
SERVICING (2.9 Ceiling Type) TURN OFF all power source switches. (4) Remove the thermistors for the liquid pipe and gas pipe. (5) Refer to the item 2.4.12 “Removing Electronic Expansion Valve Coil” in pages 2-63 and 2-64 for the procedures of removing electronic expansion valve coil. Partition Plate Thermistor for Gas Pipe Thermistor for Liquid Pipe...
Page 251: Removing Printed Circuit Board (Pcb)
SERVICING (2.9 Ceiling Type) TURN OFF all power source switches. 2.9.10 Removing Printed Circuit Board (PCB) (1) Open the air intake grille according to the item 2.9.1 “Removing Air Filter and Air Intake Grille”. (2) Turn the electrical box according to No.4 of the item 2.9.4 “Removing Fan Motor” and hook the electrical box at the lower frame.
Page 252: Total Heat Exchanger
SERVICING (2.10 Total Heat Exchanger) 2.10 Total Heat Exchanger TURN OFF all power source switches. 2.10.1 Structure The structure of the total heat exchanger is as shown in the figure. When maintaining, use service access door of ceiling. Electrical Control Box Total Heat Exchange Element Holder Service Cover...
Page 253: Removing Air Filter And Total Heat Exchanger Element
SERVICING (2.10 Total Heat Exchanger) TURN OFF all power source switches. 2.10.3 Removing Air Filter and Total Heat Exchanger Element (1) Open the service cover by pulling the hinge. (2) Remove the air filter or total heat exchanger element. Tool Phillips Screwdriver Maintenance Cover Hinge...
Page 254: Removing Fan Motor
SERVICING (2.10 Total Heat Exchanger) TURN OFF all power source switches. 2.10.4 Removing Fan Motor (1) Open the service cover by pulling the handle according to the item 2.10.3 “Removing Air Filter and Total Heat Exchager Element”. (2) Remove the air filter according to the item 2.10.3 “Removing Air Filter and Total Heat Exchanger Element”.
Page 255: Air Filter Cleaning
SERVICING (2.10 Total Heat Exchanger) TURN OFF all power source switches. 2.10.5 Air Filter Cleaning (1) Perform cleaning of the air filter more than once a year. (2) Ensure to use electric vacuum cleaner to remove dust clogged. (Otherwise, clean with water or natural type cleaning agent.) To dry-out the air filter, keep out of direct sun to avoid any deformation.
Page 256: Cleaning Indoor Unit Heat Exchanger
SERVICING (2.11 Cleaning Indoor Unit Heat Exchanger) 2.11 Cleaning Indoor Unit Heat Exchanger 2.11.1 Required Tools for Cleaning (for All Indoor Units) Remark Tool Remark Cleaning Water Pump Water Tank Approx. 18 liters Clean Water A water pump equipped with Nozzle Attached with Water Pump a tank is recommended.
Page 257: In-The-Ceiling Type
SERVICING (2.11 Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. 2.11.2 In-the-Ceiling Type Before cleaning, cover the floor with a vinyl sheet. * Refer to the item 2.11.1 “Required Tools for Cleaning” for cleaning tools. Step Procedure Required Tool Remove the drain pan according to the item 2.2.8 "Removing Drain Pan"...
Page 258 SERVICING (2.11 Cleaning Indoor Unit Heat Exchanger) Step Procedure Required Tool Protection from * Vinyl Sheet Cleaning Water * Adhesive Tape Heat Exchanger * Cutter Vinyl Sheet Discharge Sheet Suction Sheet Cover the discharge side of the heat exchanger with a vinyl sheet to protect the insulation materials inside the unit from cleaning water.
Page 259 SERVICING (2.11 Cleaning Indoor Unit Heat Exchanger) Step Procedure Required Tool Cleaning with Clean Water * Water Tank * Pump * Washer Nozzle Spray Hose Bucket Pump Insert the nozzle into the hole of the cleaning water collector. Operate the pump, wash the dust off on the fins with clean water thoroughly.
Page 260: Cleaning 4-Way Cassette Type Indoor Unit
SERVICING (2.11 Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. 2.11.3 Cleaning 4-Way Cassette Type Indoor Unit Spread a vinyl sheet over the floor to protect furnitures, etc. from cleaning water before this work. Procedure Tool Remove the optional air panel according to the item 2.4.4 Phillips Screwdriver "Removing Optional Air Panel".
Page 261 SERVICING (2.11 Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. (1) Scratch off the dust on the inner surface of the heat exchanger downwards using a brush. Collect all dust in a bucket or carton box. Tool Brush, Bucket (or Carton Box) (2) Attach a vinyl sheet by using adhesive tape around the heat exchanger so that cleaning water will not be splashed over the insulation surface and drain-up pump.
Page 262 SERVICING (2.11 Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. (7) Put approximately 15 liters of cleaning agent for aluminum fins in a supply tank. Cleaning Agent for Aluminum Fins (8) Insert the spray nozzle through the hole of the cleaning water collector. Operate the water pump and clean the dust on the heat exchanger.
Page 263 SERVICING (2.11 Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. (9) After cleaning, mount the drain pan by extending the rope downwards. NOTE: In the case that the cleaning water collector is Tool Phillips Screwdriver removed, wipe off the drops from the indoor unit. Drain Pan Cleaning Water...
Page 264: Cleaning 2-Way Cassette Type Indoor Unit
SERVICING (2.11 Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. 2.11.4 Cleaning 2-Way Cassette Type Indoor Unit Spread a vinyl sheet over the floor to protect furnitures, etc. from cleaning water before this work. (1) Remove the drain pan according to the item 2.5.8 “Removing Drain Pan”. Clean the drain pan after removal.
Page 265 SERVICING (2.11 Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. (5) Put a vinyl sheet behind the heat exchanger so that cleaning water will not be splashed on the insulation surface of the unit. Seal the gap Tool Vinyl Sheet, Tape, Cutter between vinyl sheets.
Page 266 SERVICING (2.11 Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. (8) Cleaning with Clean Water Insert the spray nozzle through the hole of the cleaning water collector. Operate the pump and clean the fins with clean water. Adjust the water pump pressure so as not to damage the fins.
Page 267: Cleaning Wall Type Indoor Unit
SERVICING (2.11 Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. 2.11.5 Cleaning Wall Type Indoor Unit Spread a vinyl sheet over the floor to protect furnitures, etc. from cleaning water before this work. (1) Remove each parts according to the item 2.6 “Wall Type”. (2) Remove the front panel according to the item 2.6.2 “Removing Front Panel”.
Page 268: Cleaning Floor Type And Floor Concealed Type Indoor Unit
SERVICING (2.11 Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. 2.11.6 Cleaning Floor Type and Floor Concealed Type Indoor Unit Spread a vinyl sheet over the floor to protect furnitures, etc. from cleaning water before this work. (1) Remove the front cover according to the item 2.7.4 and 2.8.2 “Removing Front Cover”.
Page 269 SERVICING (2.11 Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. (5) Removing Dust on Heat Exchanger Remove the dust on the heat exchanger with a brush by scratching dust downwards. Collect all dust in a bucket or carton box. Tool Brush, Bucket (or Carton Box) Bucket...
Page 270 SERVICING (2.11 Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. (8) After checking that no power is supplied, connect the drain pipe and remove the insulation tape for the wiring connectors and then mount the front cover correctly. (9) Check the insulation of the terminal board in the electrical box.
Page 271: Cleaning Ceiling Type Indoor Unit
SERVICING (2.11 Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. 2.11.7 Cleaning Ceiling Type Indoor Unit Spread a vinyl sheet over the floor to avoid cleaning water before this work. (1) Remove the left and right side covers according to the item 2.9.2 “Removing Side Cover”. (2) Remove the discharge deflector according to Tool Phillips Screwdriver...
Page 272 SERVICING (2.11 Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. (9) Cover all components except the drain pan with a vinyl sheet avoid splashed cleaning water. NOTE: Vinyl Sheet, Tape, Cutter, Wear gloves to avoid any injury during this Tool Phillips Screwdriver work due to sharp edge of fins.
Page 273: Collecting Refrigerant For Replacing Indoor Unit
SERVICING (2.12 Collecting Refrigerant for Replacing Indoor Unit) 2.12 Collecting Refrigerant for Replacing Indoor Unit (1) Prepare an empty refrigerant cylinder at -760mmHg with a charging hose. Measure the empty cylinder’s weight. (2) After shutting the stop valve on the cylinder, connect the charge hose to the liquid line stop valve. Connect a pressure gauge to the check joint on the gas line stop valve.
Page 275: Main Parts
MAIN PARTS MAIN PARTS Inverter 3.1.1 Specifications of Inverter (For 380/415V, 50Hz and 380V, 60Hz Power Source) Applicable Model RAS-5FSG, RAS-5FS3, RAS-8FSG, RAS-8FS3, RAS-10FSG, RAS-10FS3, RAS-24FSG1, RAS-24FS5, RAS-16FSG, RAS-16FS3, RAS-20FSG, RAS-30FSG1, RAS-30FS5 RAS-20FS3, RAS-8FXG, RAS-8FX3, RAS-10FXG, RAS-10FX3 Applicable Power Source 3 Phase 380/415V + 10% 50/60Hz +5% Output Voltage (Maximum) 380/415V, 3 Phase...
Page 276 MAIN PARTS Protection Function Overcurrent Protection for Inverter Detecting current is more than 150% of the rated current. Rated Current 150% Rated Current 105% 20µs 20ms Time Short-Circuit Trip of Arm Internal Protection Instantaneous Overcurrent Trip Transistor Module or ISPM Instantaneous Overcurrent Trip Electronic Thermal Trip Condition is maintained longer than 30 seconds or accumulated...
Page 277: Specifications Of Inverter (For 220V, 60Hz Power Source)
MAIN PARTS 3.1.2 Specifications of Inverter (For 220V, 60Hz Power Source) Applicable Model RAS-5FSG, RAS-5FS3, RAS-8FSG, RAS-8FS3, RAS-24FSG1, RAS-24FS5, RAS-10FSG, RAS-10FS3, RAS-30FSG1, RAS-30FS5 RAS-16FSG, RAS-16FS3, RAS-20FSG, RAS-20FS3 Applicable Power Source 3 Phase 220V + 10% 60Hz +5% Output Voltage (Maximum) 220V, 3 Phase Output Current (Maximum) 25A (5, 8 and 10HP),...
Page 278 MAIN PARTS Protection Function Overcurrent Protection for Inverter Detecting current is more than 150% of the rated current. Rated Current 150% Rated Current 105% 20µs 20ms Time Short-Circuit Trip of Arm Internal Protection Instantaneous Overcurrent Trip Transistor Module or ISPM Instantaneous Overcurrent Trip Electronic Thermal Trip Condition is maintained longer than 30 seconds or accumulated...
Page 279: Arrangement Of Inverter Power Unit
MAIN PARTS 3.1.3 Arrangement of Inverter Power Unit < RAS-5 to 20FSG/FS3 (380-415/380V, 50/60Hz) > 5HP: Before Manufacturing #U4MV0196 8 to 20HP: Before Manufacturing #U4NG1001 Parts Model Name Fin (mm) 200 X 255 X 50 Transistor Module PM25RSB120 Diode Module DF40AA160 Diode Module RM201-1A-20F...
Page 280 MAIN PARTS < RAS-5 to 20FSG/FS3 (380-415/380V, 50/60Hz) > 5HP: After Manufacturing #U4MV0197 8 to 20HP: After Manufacturing #U4NG1002 Parts Model Name Fin (mm) 200 X 255 X 50 Transistor Module 6MBP25RA120-05 Diode Module 6RI30G-160...
Page 281 MAIN PARTS < RAS-5 to 20FSG/FS3 (220V, 60Hz) > Parts Model Name Fin (mm) 200 X 255 X 50 Transistor Module 7MBP50JB060 Diode Module 6RI50E-080...
Page 282 MAIN PARTS < RAS-24 and 30FSG1/FS5 (380-415/380V, 50/60Hz) > CN201 COM2 MAIN1 SUB1 COM1 Parts Model AC Chopper FH9212P ISPM HS15A3F12 < RAS-24 and 30FSG1/FS5 (220V, 60Hz) > Parts Model ISPM 1 HS28A3F06 ISPM 2 HS06A3F06...
Page 283: Inverter Time Chart
MAIN PARTS 3.1.4 Inverter Time Chart Main Circuit Frequency LOW Power Source Frequency All bit 1 All bit 1 Operation HIGH Frequency Instruction Output Voltage Soft Start-Stop The changing speed (Frequency) depends on the outer setting. Failure Signal Output Activation of Transmit Protection Device Protection...
Page 284: Protective Function
MAIN PARTS 3.1.5 Protective Function (1) Excessive High or Low Voltage for Inverter (a) Level of Detection When the voltage of direct current is greater than (A) V, abnormalities are detected. When the voltage of direct current is smaller than (B) V, abnormalities are detected. 380 - 415V, 50Hz Power Supply 220V, 60Hz...
Page 285: Overload Control
MAIN PARTS (5) Fin Temperature Increase (Only for 24 and 30HP) (a) Level of Detection When the temperature of internal thermistor exceeds more than 100 C, an abnormality is detected. (b) Function When abnormalities are detected, the inverter compressor is stopped and the signal code of stoppage cause is transmitted to PCB1.
Page 286: Ac Chopper
MAIN PARTS AC Chopper Reduction of Electromagnetic Sound Fan Motor Control by AC Chopper: Lower electromagnetic sound and vibration have been achieved by AC Chopper control than thyristor control. AC Chopper Control Concept of Fan Speed Control The voltage applied to the fan motor is controlled by chopping (ON/OFF) the power supply voltage at a frequency of 20kHz.
Page 287 MAIN PARTS (2) Structure a. 2.1A (For Indoor Units: RCI, RCD, RPC and RPI (0.8 to 2.5HP) Models) CAUTION CN201 b. 5.6A (For Outdoor Units and Indoor Units: RPI (3.0 to 5.0HP) Models) (3) Circuit Diagram (Outline) a. 2.1A PCN202 PCN201 AC220-240V (From Control PCB)
Page 288: Auto-Louver Mechanism
MAIN PARTS Auto-Louver Mechanism 3.3.1 4-Way Cassette Type (1) Auto-Louver Operation The louvers of the optional air panel with auto-louver swing simultaneously by a drive motor. The parts of the auto-louver mechanism are shown below. The motor (1) is installed to the louver (2) directly. The louver (2) is operated by rotating the motor (1).
Page 289: 2-Way Cassette Type
MAIN PARTS 3.3.2 2-Way Cassette Type (1) Auto-Louver Operation The louvers of the optional air panel with auto-louver swing simultaneously by a drive motor. The parts of the auto-louver mechanism are shown below. Stopper Bearing Louver Bearing Shaft B Stopper Stopper AS Motor Assembly Crank...
Page 290: Ceiling Type
MAIN PARTS 3.3.3 Ceiling Type (1) Auto-Louver Operation The louvers of the optional air panel with auto- louver swing simultaneously by a drive motor. (1) AS Motor The parts and the principle of the auto-louver mechanism are shown in the right figure. (2) Pinion The AS motor (1) rotates, the pinion (2) fixed to the shaft of the AS motor (1) rotates, the rotating...
Page 291: Scroll Compressor
MAIN PARTS Scroll Compressor 3.4.1 Reliable Mechanism for Low Vibration and Low Sound (1) The rotating direction is definite. (2) The pressure inside of the chamber is high pressure, and the surface temperature of the chamber is to 110C 3.4.2 Principle of Compression (1) The gas is inhaled from the inlet port at the outer frame of the fixed scroll.
Page 292: Structure
MAIN PARTS 3.4.3 Structure The compressor has the structure for oil supply from the outer oil separator. (8 to 20HP) The inside of the oil separator is at high pressure, and the surface temperature of the oil separator is as high (60C to 110C ) as the compressor.
Page 293 MAIN PARTS Model Inverter Compressor Constant Speed Compressor Total RAS-5FSG, RAS-5FS3 Without Q'ty: 1 RAS-8FSG, RAS-8FS3 RAS-10FSG, RAS-10FS3 RAS-10FXG, RAS-10FX3 Q'ty: 1 Q'ty: 1 RAS-16FSG, RAS-16FS3 Q'ty: 1 Q'ty: 2 RAS-20FSG, RAS-20FS3 Q'ty: 1 Q'ty: 3 RAS-24FSG1, RAS-24FS5 RAS-30FSG1, RAS-30FS5 Q'ty: 1 Q'ty: 1 Q'ty: 2...
Page 294: Thermistor
MAIN PARTS Thermistor 3.5.1 Thermistor for Indoor Unit (1) Position of Thermistor (In Case of 4-Way Cassette Type) Thermistor for Indoor Heat Exchanger Gas Pipe Temperature (THM5) Thermistor for Air Outlet Thermistor for Indoor Heat Thermistor for Temperature Exchanger Liquid Pipe Air Inlet Temperature (THM2) Temperature...
Page 295: Thermistor For Outdoor Unit
MAIN PARTS 3.5.2 Thermistor for Outdoor Unit (1) Position of Thermistor <Example: RAS-30FSG1> Thermistor for Outdoor Ambient Temperature Thermostat Holder Holder Thermistor for Discharge Gas Temperature Thermistor for Evaporating Temperature (2) Thermistor for Upper Part Temperature of Compressor (For Prevention of Discharge Gas Overheating) a.
Page 296 MAIN PARTS (3) Thermistor for Outdoor Ambient Temperature The thermistor resistance characteristics are shown in the figure below. (4) Thermistor for Evaporating Temperature of Outdoor Unit in Heating Operation (For Defrosting) The characteristics for the thermistor is the same with the value of outdoor ambient temperature thermistor as shown in the figure below.
Page 297: Electronic Expansion Valve
MAIN PARTS Electronic Expansion Valve 3.6.1 Electronic Expansion Valve for Outdoor Units Micro-Computer Pulse Signal Pulse Motor 2-Phase Permanent Magnetic Pulse Motor Control 0 to 500 Pulse by 1 Pulse Refrigerant Flow Control Precise Control Needle Specifications Items Specifications Models to be Applied For Main Cycle of RAS-5FSG, RAS-5FS3, RAS-8FSG, RAS-8FS3, RAS-10FSG, RAS-10FS3, RAS-16FSG, RAS-16FS3, RAS-20FSG, RAS-20FS3,...
Page 298: Electronic Expansion Valve For Indoor Units
MAIN PARTS 3.6.2 Electronic Expansion Valve for Indoor Units Micro-Computer Pulse Signal Magnet 2-Phase Permanent Magnetic Pulse Motor Coil Pulse Motor Control 0 to 2,000 Pulse by 1 Pulse Gear Refrigerant Flow Control Precise Control Driver Bellows Valve Specifications Items Specifications Type EDM Type...
Page 299: Pressure Sensor
MAIN PARTS Pressure Sensor Heating Operation (1) High Pressure Control The high pressure during heating operation Proportional Control of is detected by a high pressure sensor, and Compressor Frequency compressor frequencies are controlled by with Operating Capacity High of Indoor Units the proportional controlling method with Pressure Control...
Page 300: High Pressure Protection Device
MAIN PARTS High Pressure Protection Device If the discharge pressure is excessively high, the compressor and the component parts of the refrigeration cycle can be damaged. Therefore, in case that the discharge pressure is higher than 3.3/3.0MPa (R407C/R22), the protection control is activated and the compressor is stopped. High Pressure Switch Low Pressure...
Page 301: Noise Filter (Nf)
MAIN PARTS Noise Filter (NF) The noise filter decreases the leakage of noise made by the inverter to the power supply side. Terminals indicated with “OUT” are connected to the inverter side and terminals indicated with “IN” to the power supply side.
Page 302 MAIN PARTS for RAS-5 to RAS-20FSG/FS3 Items Specifications Model 20PTT10-H Rated Current AC415V 20A Permissible Temperature Range C to 85 Circuit Diagram 7.0 ± 0.3 118 ± 0.3 118 ± 0.3 Date Code 20PTT10-H 415VAC/20A 5 - φ4.2 Unit: mm for RAS-24 and 30FSG1/FS5 Items Specifications...
Page 303: Capacitor (Cb1, Cb2)
MAIN PARTS 3.10 Capacitor (CB1, CB2) This part is used for changing the alternative current to the direct current for the inverter. Connect two capacitor in line and used. Specifications Items Specifications Models 400LGSN2700M 2700µF Capacity of Static Electricity Rated Voltage 400V Permissible Temperature Range C to 95...
Page 304 MAIN PARTS for RAS-5 to 20FSG/FS3 (220V/60Hz) Items Specifications Character 0.5mH+10% (at 1kHz) Rated Current Direct Resistance 12.2mΩ+20% (at 20 Permissible Temperature Range C to 65 ±0.5 ±2 for RAS-24 and 30FSG1/FS5 Items Specifications Character 0.5mH+10% (at 1kHz) Rated Current Direct Resistance 15mΩ+20% (at 20 Permissible Temperature Range...
Page 305: Optional Function
OPTIONAL FUNCTION (4.1 Indoor Unit) OPTIONAL FUNCTION Indoor Unit (For RPF(I)-FSG(E), RPK-FSGM(6), RPC-FSG1 (Before Alteration) and RPI (8, 10HP) Series) 4.1.1 Remote Control ON/OFF Function This function provides a control to stop and start the system automatically from a remote place. Three methods are available by using each signal from a building management system.
Page 306 OPTIONAL FUNCTION (4.1 Indoor Unit) (2) Remote Control 2 (Pulse Signal Input) This is an ON/OFF function from a remote place by using pulse signal. The basic wiring and time chart are shown below. Turn OFF the power source before setting the dip switch. Indoor Unit PCB Set No.6 at ON side.
Page 307 OPTIONAL FUNCTION (4.1 Indoor Unit) (3) Remote Control 3 (Pulse Signal Input) By using the signal from a building management system, the air conditioners can be stopped. If a signal is input during stoppage of air conditioner, the air conditioner remains unchanged. The basic wiring and time chart are shown below.
Page 308 OPTIONAL FUNCTION (4.1 Indoor Unit) (4) Cancellation of Commands from Remote Control Switch after Forced Stoppage (Level Signal Input) By using the signal from a building management system, the air conditioners can be stopped and the individual commands from the remote control switch are canceled. The basic wiring and time chart are shown below.
Page 309: Power Supply On/Off 1 (Automatic Operation When Power Supply On)
OPTIONAL FUNCTION (4.1 Indoor Unit) 4.1.2 Power Supply ON/OFF 1 (Automatic Operation When Power Supply ON) Set the dip switch on the PCB for the indoor unit as shown in the figure below to start and stop the system automatically according to the power supply ON/OFF. When this function is utilized in the condition that there is no person to operate the unit, make the system with monitoring for disaster prevention.
Page 310: Control By Field-Supplied Room Thermostat
OPTIONAL FUNCTION (4.1 Indoor Unit) 4.1.4 Control by Field-Supplied Room Thermostat In the case that a field-supplied room thermostat instead of the inlet thermistor of the indoor unit is used, connect wires as shown below. The required parts are shown in Table 4.2. Turn OFF the power source before setting the dip switch.
Page 311: Operation Control By Remote Temperature Sensor (Except For Rpk-Fsgm Series)
OPTIONAL FUNCTION (4.1 Indoor Unit) 4.1.5 Operation Control by Remote Temperature Sensor (Except for RPK-FSGM (Before Alteration) Series) By using an optional remote temperature sensor, the followings are available. (1) The unit is controlled by the average temperature of the inlet air thermistor and remote temperature sensor.
Page 312: Picking Up Operation Signal
OPTIONAL FUNCTION (4.1 Indoor Unit) 4.1.7 Picking Up Operation Signal Table 4.3 Required Parts for Modification Parts Name Specification / Model Auxiliary Relay * OMRON made High Power Relay Model LY2F DC24V (*) Connector Cable PCC-1 (3P Connector Cable) (*) *: Do not use the relay with diode.
Page 313 OPTIONAL FUNCTION (4.1 Indoor Unit) (3) Picking Up Heating Operation Signal (Except for RPK-FSGM Series) This function is utilized to pick up the heating operation signal. The contact of RYa is closed when heating operation signal is ON despite “Thermo-ON” or “Thermo-OFF”. Connect the wires as shown below.
Page 314 OPTIONAL FUNCTION (4.1 Indoor Unit) (5) Picking Up Cooling Operation Signal (Except for RPK-FSGM Series) This function is utilized to pick up the cooling signal. The contact of RYa is closed when cooling operation signal is ON despite “Thermo-ON” or “Thermo-OFF”. Connect the wires as shown below. The required main parts are indicated in Table 4.3.
Page 315: Indoor Unit (For Rpi (0.8 To 5.0Hp), Rci, Rcd, Rpc (After Alteration) And Kpi Series)
OPTIONAL FUNCTION (4.2 Indoor Unit) Indoor Unit (For RPI (0.8 to 5.0HP), RCI, RCD, RPC (After Alteration) and KPI Series) 4.2.1 Input and Output Setting of Indoor PCB Connector For the external input and output signal, there are two input ports (CN3) and three output ports (CN7, CN8) prepared on the indoor unit PCB.
Page 316 OPTIONAL FUNCTION (4.2 Indoor Unit) (4) Setting Procedures (a) At the input and output setting mode, the indication on the remote control switch is changed as shown in the right figure. The allocated port for input and output signal is indicated at the segments for timer setting time indication.
Page 317: Remote Control Thermistor Function
OPTIONAL FUNCTION (4.2 Indoor Unit) Factory-Setting Connector No. Pin No. of Connector Setting When Shipping Indication Input #1 - #2 Remote Control ON/OFF Function 1 Cancellation of Commands from Remote #2 - #3 Control Switch after Forced Stoppage Output #1 - #2 Operation Signal #1 - #3 Alarm Signal...
Page 318 OPTIONAL FUNCTION (4.2 Indoor Unit) 4.2.3 Remote Control ON/OFF Function This function provides a control to stop and start the system from a remote place. Four methods are available by using each signal from a building management system. The factory-setting is as follows; “Remote Control 1” Signal Input to 1# and 2# of CN3 (item (1)), and “Cancellation of Commands from Remote Control Switch after Forced Stoppage”...
Page 319 OPTIONAL FUNCTION (4.2 Indoor Unit) (2) Remote Control 2 (Pulse Signal Input) This is an ON/OFF function from a remote place by using pulse signal. The basic wiring and time chart are shown below. (In Case of “ON” Signal Input to 2# and 3# of CN3 and “OFF” Signal Input to 1# and 2# of CN3) NOTES: 1.
Page 320 OPTIONAL FUNCTION (4.2 Indoor Unit) (3) Remote Control 3 By using the signal from a building management system, the air conditioners can be stopped. If a signal is input during stoppage of air conditioner, the air conditioner remains unchanged. The basic wiring and time chart are shown below. (In Case of “Stoppage”...
Page 321 OPTIONAL FUNCTION (4.2 Indoor Unit) (4) Cancellation of Commands from Remote Control Switch after Forced Stoppage By using the signal from a building management system, the air conditioners can be stopped and the individual commands from the remote control switch are canceled. The basic wiring and time chart are shown below.
Page 322: Power Supply On/Off 1 (Automatic Operation When Power Supply On)
OPTIONAL FUNCTION (4.2 Indoor Unit) Table 4.4 Specifications on Required Components Component Manufacturer or Specifications Remarks OMRON Mini Power Relay Auxiliary Relay (X1, X2) Voltage Model: MY1F or Equivalent 220V or 240V Changeover Switch (SS2, SS3) Manual Type Optional Part PCC-1A Five Cords with 3P Connector Cord (Able to Connect JST Connector XARP-3)
Page 323: Control By Field-Supplied Room Thermostat (Except For Kpi Series)
OPTIONAL FUNCTION (4.2 Indoor Unit) 4.2.6 Control by Field-Supplied Room Thermostat (Except for KPI Series) In the case that a field-supplied room thermostat instead of the inlet thermistor of the indoor unit is used, connect wires as shown below. The required parts are shown in Table 4.5. (In Case of “Room Thermostat (Cooling)”...
Page 324: Operation Control By Remote Temperature Sensor (Except For Kpi Series)
OPTIONAL FUNCTION (4.2 Indoor Unit) 4.2.7 Operation Control by Remote Temperature Sensor (Except for KPI Series) By using an optional remote temperature sensor, the followings are available. (1) The unit is controlled by the average temperature of the inlet air thermistor and remote temperature sensor.
Page 325: Precooling/Preheating Operation (Kpi Series Only)
OPTIONAL FUNCTION (4.2 Indoor Unit) 4.2.9 Precooling/Preheating Operation (KPI Series Only) This function is delayed to start the total heat exchanger at interlock with air conditioner. (1) 30 minutes Period Total heat exchanger starts 30 minutes later after starting air conditioner. This function is set by optional function on remote control switch (PC-P1H).
Page 326 OPTIONAL FUNCTION (4.2 Indoor Unit) (2) Picking Up Alarm Signal This signal is utilized to pick-up activation of safety devices and is normally indicated on the remote control switch. However, this function is not available under abnormal transmission conditions. Connect the wires as shown below. Please note that the contact of auxiliary relay, RYa is closed when one of the safety devices is activated.
Page 327 OPTIONAL FUNCTION (4.2 Indoor Unit) (4) Picking Up “Thermo-ON” Signal during Heating Operation (Except for KPI Series) This function is utilized to pick up the heating “Thermo-ON” signal of compressor running to control a circulator or a humidifier. Connect wires as shown below. The contact of RYa is closed when “THERMOSTAT”...
Page 328 OPTIONAL FUNCTION (4.2 Indoor Unit) (6) Picking Up “Thermo-ON” Signal during Cooling Operation (Except for KPI Series) This function is utilized to pick up the cooling “Thermo-ON” signal of compressor running. Connect the wires as shown below. The contact of RYa is closed when “THERMOSTAT” is ON during cooling operation mode. (In Case of Giving “Thermo-ON”...
Page 329: Outdoor Unit
OPTIONAL FUNCTION (4.3 Outdoor Unit) Outdoor Unit On the outdoor unit printed circuit board, there are three input terminals to receive external signals and two or five output terminals to send signals outwards. These signals are available by setting as shown below. Function No.
Page 330 OPTIONAL FUNCTION (4.3 Outdoor Unit) (2) By pressing the push-switches PSW2 and PSW3, input/output terminal name is changed. The following shows the display changes when PSW2 and PSW3 are pushed. PSW3 Indication for Input 1 PSW2 PSW3 Indication for Input 2 PSW2 PSW3 Indication...
Page 331: Demand
OPTIONAL FUNCTION (4.3 Outdoor Unit) 4.3.1 Demand In the case that the demand input terminals on the outdoor unit printed circuit board are short-circuited, compressor(s) is stopped. (In this case, the indoor unit(s) is put under thermo-OFF condition.) The stoppage code No. “10” is given. By disconnecting the demand switch contact, restarting is available. The following indicates an example for Demand at input 3 (between 1 and 2 pins of CN18).
Page 332: Demand Current Control (Only For 24 And 30Hp)
OPTIONAL FUNCTION (4.3 Outdoor Unit) 4.3.3 Demand Current Control (Only for 24 and 30HP) In the case that the demand input terminals on the outdoor unit PCB are short-circuited, the compressor frequency is controlled that the maximum limit of the outdoor running current is set 80%, 70% and 60%. (The maximum limit of the outdoor unit running current can be selected according to the item “4.3 Outdoor Unit”.) If the outddor unit running current decreses beyond the maximum limit, the indoor unit is put under themo-...
Page 333: Snow Sensor
OPTIONAL FUNCTION (4.3 Outdoor Unit) 4.3.5 Snow Sensor In the case that the input terminals of the snow sensor are short-circuited during compressor stoppage, all the outdoor fan motors are operated at the full speed. However, if the compressor is called for compressor operation, the fan operation is changed to the normal operation.
Page 334: Defrosting Condition Changeover
OPTIONAL FUNCTION (4.3 Outdoor Unit) 4.3.6 Defrosting Condition Changeover By changing the position of No.5 on dip switch, DSW5, defrosting operation conditions can be changed. Standard Specifications Cold Area Specifications Dip Switch Setting Defrosting Operation Defrosting Operation Stop Area Stop Area Outdoor Evaporating Outdoor Evaporating Temperature...
Page 335: All Season Heating Operation
OPTIONAL FUNCTION (4.3 Outdoor Unit) 4.3.8 All Season Heating Operation By setting the dip switch, the heating operation through the year is available. The heating operation is continued under a high outdoor temperature. (1) No. 3 of DSW5 is set at OFF before shipment. (2) Turn OFF the main switch and set the dip switch.
Page 336: Night Shift (Low Sound) Operation
OPTIONAL FUNCTION (4.3 Outdoor Unit) 4.3.10 Night Shift (Low Sound) Operation By changing No.2 of the dip switch, DSW5, the night shift (low sound) operation can be set. In case of the night shift operation, the cooling capacity is decreased down to 60%. The night shift operation shall be applied only in case that the cooling capacity has the margin to be allowed for the capacity decrease and the low sound operation is required especially in the nighttime.
Page 337: Picking Up Signals From Outdoor Unit Printed Circuit Board
OPTIONAL FUNCTION (4.3 Outdoor Unit) 4.3.11 Picking Up Signals from Outdoor Unit Printed Circuit Board The setting function of input terminal are shown to the item 4.3 “Outdoor Unit”. The parts applied to picking up operation signals are shown in Table 4.7. Table 4.7 Main Required Part Part Name Manufacturer etc.
Page 338 OPTIONAL FUNCTION (4.3 Outdoor Unit) (3) Picking Up Compressor ON Signal With this procedure the compressor operation signal can be picked up. The method is explained in the figure below. The required part is the same part as in Table 4.7. Connecting relay contactors RYa are closed at the time of compressor running.
Page 339: Remote Control Switch, Pc-P1H And Pc-2H2
OPTIONAL FUNCTION (4.4 Remote Control Switch) Remote Control Switch, PC-P1H and PC-2H2 4.4.1 Name of Part Liquid Crystal Display (L.C.D) Section Swing Louver Indicator ON / OFF Timer (Timer "DEFROST" Indicator Fan Speed Indicator CENTRAL (Central Control) Indicator Operation) Indicator Ventilation Indicator SET TEMP (Set Temperature) Indicator...
Page 340: Simultaneous Operation
OPTIONAL FUNCTION (4.4 Remote Control Switch) 4.4.2 Simultaneous Operation Simultaneous Indoor Unit Operation with Remote Control Switch [All power sources must be turned off!!] Up to 16 indoor units can be simultaneously controlled using one remote control switch. The operation mode such as fan, cooling or heating, the setting of air flow, the setting of temperature and the setting of run/stop can only be set uniformly for all units.
Page 341 OPTIONAL FUNCTION (4.4 Remote Control Switch) (2) Connected unit control wires should not be installed parallel to 200-400V power cables. Fix them by utilizing bands. It is recommended, that cables be installed at least 30cm away from power cables or be put into grounded metal pipes.
Page 342: Operation System With Two Remote Control Switches
OPTIONAL FUNCTION (4.4 Remote Control Switch) 4.4.3 Operation System with Two Remote Control Switches <PC-2H2> (1) By installing an additional remote control switch, a maximum of 16 units can be controlled from two different locations. Altering Method to Sub Control Switch Cut Jumper Wire JP01 with Nipper.
Page 343 OPTIONAL FUNCTION (4.4 Remote Control Switch) <PC-P1H> (1) By installing an additional remote control switch, a maximum of 16 units can be controlled from two different locations. Main and Sub Control Switch Determine one of the two remote control switches to be the main switch and the other as a sub switch.
Page 344: Optional Function Setting
OPTIONAL FUNCTION (4.4 Remote Control Switch) 4.4.4 Optional Function Setting The remote control switch is changed to the optional setting mode by the following procedures. (1) Field Setting Mode Check to ensure that the unit is stopped, press the “CHECK” switch and the “RESET” switch on the remote control switch simultaneously more than 3 seconds, and the remote control switch is changed to the field setting mode.
Page 345 OPTIONAL FUNCTION (4.4 Remote Control Switch) The setting condition of the optional function item is indicated at the segments for timer setting time indication. Refer to the table in the next pages and description of each items for the indication of the setting condition and the contents of the optional function. (b) Press the “TIME ”...
Page 346 OPTIONAL FUNCTION (4.4 Remote Control Switch) Not Available Hi Speed at Heating Thermo-OFF Available Canceling of Not Available Enforced 3 Minutes Minimum Operation Time Available of Compressor Control by Indoor Suction Thermistor Control by Thermistor of Remote Control Switch Thermistor of Control by Average Value of Indoor Suction Remote Control Switch Thermistor and Thermistor of Remote Control...
Page 347: Optional Functions Of Remote Control Switch
OPTIONAL FUNCTION (4.4 Remote Control Switch) 4.4.5 Optional Functions of Remote Control Switch (1) Removal of Heating Temperature Calibration This function is utilized when the temperature settings of the remote control switch and the suction air temperature of the indoor unit are required to be equal. In standard heating operation, the suction air temperature is higher than the room temperature, therefore the suction air temperature is calibrated -4°C.
Page 348 OPTIONAL FUNCTION (4.4 Remote Control Switch) (4) Change of Filter Cleaning Time The period for filter sign indication is set for each indoor unit model when shipping. The filter sign is indicated according to the filter cleaning time (Factory-Setting). However, this filter cleaning time can be changed depending on the condition of the filter as shown in the table below.
Page 349 OPTIONAL FUNCTION (4.4 Remote Control Switch) (17) Remote Control Thermistor This function is utilized to control the unit by the built-in thermistor of the remote control switch (remote control thermistor) instead of the thermistor for suction air. Set this function at “01” or “02” when utilizing this function. However, even when this function is set at “01”...
Page 350 OPTIONAL FUNCTION (4.4 Remote Control Switch) (26) Increasing Supply Air Volume (Total Heat Exchange Model) This function is utilized to increase the supply air volume with the one-step high tap of the fan motor for supply air during operation of the total heat exchanger, make the room pressure higher than the surrounded room with the increased supply air volume and prevent the polluted air and smell from entering into the room.
Page 351: Indication Of Address (Adds) And Refrigerant Cycle Number (Rn)
OPTIONAL FUNCTION (4.4 Remote Control Switch) 4.4.6 Indication of Address (ADDS) and Refrigerant Cycle Number (RN) The address and the refrigerant cycle number can be indicated on the liquid crystal display of the remote control switch. (1) Model Indication Mode During operation or stoppage in normal condition, press the “TEMP ”...
Page 352: Wireless Remote Control Switch, Pc-Lh3
OPTIONAL FUNCTION (4.5 Wireless Remote Control Switch) Wireless Remote Control Switch, PC-LH3 4.5.1 Name of Part Wireless Remote Control Switch (PC-LH3: Option) 4-48...
Page 353: Identifying Of Indoor Units Installed Side By Side
OPTIONAL FUNCTION (4.5 Wireless Remote Control Switch) 4.5.2 Identifying of Indoor Units Installed Side By Side NOTE: This function is not available in case of simultaneous operation mode. When installing two (2) indoor units side by side, the commands from the wireless remote control switch can be received by both the indoor units.
Page 354: Simultaneous Operation
OPTIONAL FUNCTION (4.5 Wireless Remote Control Switch) 4.5.3 Simultaneous Operation Up to 16 indoor units can be simultaneously Indoor Unit controlled using one wireless remote control switch. In this case, only two (2) air panels for wireless Controller control can be connected. Apply the simultaneous operation only in the case that the plural indoor units are installed in Control Cable between...
Page 355 OPTIONAL FUNCTION (4.5 Wireless Remote Control Switch) (3) Connected unit control wires should not be installed parallel to 200-400V power cables. Fix them by utilizing bands. It is recommended that cables be installed at least 30cm away from power cables or be put into grounded metal pipes.
Page 356: Emergency Operation
OPTIONAL FUNCTION (4.5 Wireless Remote Control Switch) 4.5.4 Emergency Operation In case that the unit is required to be operated when the wireless remote control switch is out of battery and can not function, etc., the unit can be operated by the emergency operation switch. The cooling operation and the heating operation are available for the emergency operation.
Page 357: Optional Function Setting (In Case Of Pc-Rlh4, Pc-Rlh5 And Pc-Rlh7)
OPTIONAL FUNCTION (4.5 Wireless Remote Control Switch) 4.5.5 Optional Function Setting (In Case of PC-RLH4, PC-RLH5 and PC-RLH7) Turn OFF all the power sources before setting the dip switches. The following optional functions can be set by the dip switches of the receiver part. Change of Filter Cleaning Time Removal of Heating Temperature Calibration Circulator Function at Heating Thermo-OFF...
Page 358: Optional Functions Of Wireless Remote Control Switch
OPTIONAL FUNCTION (4.5 Wireless Remote Control Switch) 4.5.6 Optional Functions of Wireless Remote Control Switch (1) Change of Filter Cleaning Time The filter sign (LED; Yellow) of the receiver part is set to turn ON after the total operation period is over 1,200 hours approximately (Factory-Setting).
Page 359: 7-Day Timer, Psc-5T
OPTIONAL FUNCTION (4.6 7-Day Timer) 7-Day Timer, PSC-5T <Name of Parts> The figure below shows all the indications for reference. Liquid Crystal Display Section The actual display during operation is different. Indication of Indication of Pattern Setting Mode Selection Indication of ON/OFF Setting Time Indication of Indication of * Setting 1, Setting 2 and...
Page 360: Central Station, Psc-5S
OPTIONAL FUNCTION (4.7 Central Station) Central Station, PSC-5S This central station is of the soft touch type. (Operation except with finger is not recommended.) Activation can be checked by referring to the liquid crystal display and LEDs. <Name of Parts> The figure below shows all the indications for reference.
Page 361: Field Work Instruction
FIELD WORK INSTRUCTION FIELD WORK INSTRUCTION Burnt-out Compressor due to Insufficient Refrigerant Charge Question and Answer for Field Work Example 1: Burnt-out Compressor due to Insufficient Refrigerant Charge [Phenomenon] After commissioning, alarm code “08” sometimes occurred and compressors were burnt out after 2 month operation.
Page 362: Insufficient Cooling Performance When A Long Piping Is Applied
FIELD WORK INSTRUCTION Insufficient Cooling Performance When A Long Piping Is Applied Question and Answer for Field Work Example 2: Insufficient Cooling Performance When A Long Piping Is Applied [Phenomenon] Sufficient cooling was not available for an indoor unit which located at the farthest position. [Cause] In the case that an outdoor unit is located 20 meters lower than indoor units, resetting of the dip switch, DSW3 is required.
Page 363: Abnormally High Operating Sound [In-The-Ceiling Type Indoor Unit]
FIELD WORK INSTRUCTION Abnormally High Operating Sound [In-the-Ceiling Type Indoor Unit] Question and Answer for Field Work Example 3: Abnormally High Operating Sound [In-the-Ceiling Type Indoor Unit] [Phenomenon] Operating sound during “Hi” speed was abnormally high. [Cause] The indoor units was installed without ducts of inlet side and outlet side. Due to almost no external static pressure, abnormally big air volume was supplied, resulting in higher air speed through the heat exchanger.
Page 364: Alarm Code "31
FIELD WORK INSTRUCTION Alarm Code “31” Question and Answer for Field Work Example 4: Alarm Code “31” [Phenomenon] Alarm code “31” sometimes occurred and the system was stopped. [Cause] Combination of the indoor and outdoor unit was as follows. I.U. I.U.
Page 365: Not Cooling Well Due To Insufficient Installation Space For Outdoor Unit
FIELD WORK INSTRUCTION Not Cooling Well due to Insufficient Installation Space for Outdoor Unit Question and Answer for Field Work Example 5: Not Cooling Well due to Insufficient Installation Space for Outdoor Unit [Phenomenon] Cooling operation was well performed through the intermediate season. However, the cooling operation was not well available when the outdoor temperature was higher than 35°C.
Page 366: Attention For Set-Free Fxg/Fx3 Series
FIELD WORK INSTRUCTION Attention for SET-FREE FXG/FX3 Series The SET-FREE FXG/FX3 series has been designed for the system to provide simultaneous cooling and heating operations during intermediate seasons and the refrigerant cycle is controlled according to heat balance of cooling and heating. Therefore, pay attention to the followings for the selection of installing sites and the installation work.
Page 367 FIELD WORK INSTRUCTION [Countermeasure] Perform the heat load calculation with the decreased capacity as shown in the graph in page 5-8. Do not install the unit in such a place where temperature difference among rooms is big and the heat load when cooling and heating is excessively big during simultaneous COOL/HEAT operation.
Page 368 FIELD WORK INSTRUCTION (3) Piping Length of Farthest Indoor Unit: [Phenomenon] During the simultaneous cooling and heating operation, the cooling capacity of the farthest indoor unit is decreased when the farthest indoor unit is in cooling operation and the second farthest indoor unit is in heating operation.
Page 369 FIELD WORK INSTRUCTION [Example] * In Case of Start-Up in Simultaneous COOL/HEAT Operation Mode Cooling Heating * In Case of Start-Up in Cooling Operation Mode (and Changeover to Simultaneous COOL/HEAT Operation Mode Afterward) Cooling Heating 10 to 20min. <Attention for Automatic COOL/HEAT Operation> In the case that the indoor units are operated under an automatic cooling/heating operation by pressing the AUTO COOL/HEAT switch, pay attention to the followings.
Page 370 FIELD WORK INSTRUCTION <Attention for Installing CH Unit> Before installing the CH units, pay attention to the service access and sound. (1) The CH unit consists of mechanical components such as solenoid valves in order to change the operation mode from cooling to heating or heating to cooling respectively. Therefore, please provide a service access door (minimum of 600✕600mm) beneath the CH unit.
Page 371: Select Guide Of Drain Pipe For Indoor Unit
FIELD WORK INSTRUCTION Select Guide of Drain Pipe for Indoor Unit ● Selecting Method of Drain Pipe Diameter <Step 1> Calculation of Drain Flow Volume Calculate from that the drain flow volume is approximately 3 [l/hr] per 1HP of the indoor unit nominal capacity.
Page 372: Caution On Refrigerant Leakage
FIELD WORK INSTRUCTION Caution on Refrigerant Leakage (1) Maximum Permissible Concentration of HCFC Gas The refrigerant R407C (or R22), charged in the SET-FREE FSG, FS1/FS3, FS5 and FXG/FX3 system, is an incombustible and non-toxic gas. However, if leakage occurs and gas fills a room, it may cause suffocation.
Page 373 FIELD WORK INSTRUCTION <Example> System A System B Outdoor Unit Outdoor Unit 20HP 18HP System A System B Refrigerant: 60kg Refrigerant: 50kg Height 2.5m Floor Floor Floor Floor Floor 400m 120m Gas Leak Detector Opening: 0.06m Ventilator 2m /min Room R (kg) Countermeasure V (m...
Page 374: Maintenance Work
FIELD WORK INSTRUCTION Maintenance Work (1) For Indoor Unit and Outdoor Unit (a) Fan and Fan Motor ● Lubrication - All fan motors are pre-lubricated and sealed at the factory. Therefore, no lubricating maintenance is required. ● Sound and Vibration - Inspect for abnormal sound and vibration. ●...
Page 375: Service & Maintenance Record By 7-Segment Display
FIELD WORK INSTRUCTION 5.10 Service & Maintenance Record by 7-Segment Display Data Sheet for Checking by 7-Segment Display Client: Checked by: Date: Outdoor Unit Model (Serial No. RAS- (Serial No. RAS- (Serial No. RAS- (Serial No. RAS- (Serial No. RAS- (Serial No.
Page 376: Service & Maintenance Record By Remote Control Switch
FIELD WORK INSTRUCTION 5.11 Service & Maintenance Record by Remote Control Switch Data Sheet for Checking by Remote Control Switch Time Client: I.U. Model Installation Date: I.U. Serial No. System No.: I.U. No. / Alarm Code Date Checked: Check Mode 1 Check Mode 2 Checked by: B Temp.
Page 377: Service & Maintenance Record
FIELD WORK INSTRUCTION 5.12 Service & Maintenance Record Service & Maintenance Record Check Item Action Judgement YES or NO Is service space sufficient? YES or NO Short Circuit of Discharge Air? YES or NO Any Heat Influence YES or NO Is earth wire connected? Refrigeration Piping GOOD or NOT GOOD...
Page 380 Specifications in this catalog are subject to change without notice, in order that HITACHI may bring the latest innovations to their customers. Catalog No.5413553 2003 Printed in Japan (N)
Page 381 ELECTRICAL WIRING DIAGRAMS All data related to Indoor Units can be 8. ELECTRIC WIRING DIAGRAM (For Models: RAS-8FXG and RAS-10FXG) found in Technical Catalogue for FSG 0DUN 1DPH Capacitor Capacitor CH, CH Crankcase Heater Contactor for Compressor Motor CN, PCN Connector Capacitor Current Transformer...
Page 382 ELECTRICAL WIRING DIAGRAMS ELECTRIC WIRING DIAGRAM (For Models: CH-4.0GE and CH-6.5GE) For CH-6.5GE Only Cooling/Heating Changeover Unit ELECTRICAL CONTROL BOX Arrangement of Solenoid Valve (view of the top) Electrical Control Box ElectricFactory Wiring Earth Wiring Field Wiring Factory Setting Position (Dip Switch) Power Supply Outdoor Unit or...

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Hitachi RPI-0.8FSG1 Service Manual

1 Troubleshooting

2 Servicing

3 Main Parts

4 Optional Function

5 Field Work Instruction

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Summary of Contents for Hitachi RPI-0.8FSG1