Service Manual
Table Of Contents
- Contents
- 1. General information
- 2. Unit Installation
- 3. Piping work and refrigerant charge
- 4. Electrical wiring
- 4.1 General notes
- 4.2 Electrical wiring connection for the outdoor unit
- 4.3 Setting the DIP switches for the outdoor unit
- 4.4 Common wiring
- 4.5 H-LINK II system
- 4.6 System Control
- 4.7 Electrical wiring diagrams
- 4.7.1 RAS-(2-2.5)HVNP / RAS-3HVNC (1~ 230V 50Hz)
- 4.7.2 RAS-3HVNPE (1~ 230V 50Hz)
- 4.7.3 RAS-(4-6)HVNPE (1~ 230V 50Hz)
- 4.7.4 RAS-(4-6)HNPE (3N~ 400V 50Hz)
- 4.7.5 RAS-(4-6)HVNCE (1N~ 230V 50Hz)
- 4.7.6 RAS-(4-6)HNCE (3N~ 400V 50Hz)
- 4.7.7 RAS-(8-10)HN(P/C)E (3N~ 400V 50Hz)
- 4.7.8 RAS-12HNP (3N~ 400V 50Hz) - Preliminary data
- 4.7.9 RAS-12HNC (3N~ 400V 50Hz) - Preliminary data
- 5. Control System
- 5.1 Device control system
- 5.2 Outdoor units PCB
- 5.3 Protection and safety control
- 5.4 Standard operation sequence
- 5.5 Standard control functions
- 5.5.1 Freezing protection during cooling process or dry operation
- 5.5.2 Prevention Control for High Pressure Increase during Cooling Operation
- 5.5.3 Prevention control for excessively high discharge gas temperature
- 5.5.4 Activation for protection device control
- 5.5.5 Preheating control of compressor
- 5.5.6 Prevention control for high pressure increase
- 6. Optional functions
- 7. Test run
- 7.1 Checking procedure before the test run
- 7.2 Test run procedure using the remote control switch (PC-ART)
- 7.3 Test run procedure using the remote control switch (PC-ARF)
- 7.4 Test run procedure using the wireless remote control switch (PC-LH3A/B)
- 7.5 Test run procedure from the outdoor unit side
- 7.6 Check list
- 8. Troubleshooting
- 8.1 Initial troubleshooting
- 8.2 Troubleshooting procedure
- 8.3 Troubleshooting in check mode
- 8.4 Checking procedure for main parts
- 8.4.1 Procedure for checking the DIP-IPM inverter for indoor and outdoor units
- 8.4.2 Checking capacitors CB1 & CB2.
- 8.4.3 Fault diagnosis of DC fan motor.
- 8.4.4 Checking procedure for the electronic expansion valve for indoor and outdoor units
- 8.4.5 Checking procedure for AC fan motor
- 8.4.6 Checking procedure for other parts
- 9. Spare parts
- 10. Servicing
- 10.1 Introduction
- 10.2 Servicing for Outdoor Units RAS-(2-2.5)HVNP and RAS-3HVNC
- 10.3 Servicing for Premium series
- 10.3.1 Outdoor unit RAS-3HVNPE
- 10.3.1.1 Removing service cover
- 10.3.1.2 Remove outlet grille
- 10.3.1.3 Removing upper cover
- 10.3.1.4 Removing bottom service cover and rear cover
- 10.3.1.5 Removing outdoor fan motor
- 10.3.1.6 Removing electrical box
- 10.3.1.7 Removing the compressor
- 10.3.1.8 Removing the High pressure switch and Pressure switch for control
- 10.3.1.9 Opening electrical box (P plate)
- 10.3.1.10 Removing Reversing valve coil
- 10.3.1.11 Removing electronic expansion valve coil
- 10.3.1.12 Removing solenoid valve coil (SVC)
- 10.3.1.13 Removing reversing valve
- 10.3.1.14 Removing Electronic expansion Valve and Solenoid Valve
- 10.3.1.15 Removing electrical components
- 10.3.1.16 Removing other electrical components
- 10.3.2 Outdoor units RAS-(4-6)H(V)NPE
- 10.3.2.1 Removing service cover
- 10.3.2.2 Removing air outlet grille
- 10.3.2.3 Removing upper cover
- 10.3.2.4 Removing the bottom service cover and rear cover
- 10.3.2.5 Removing outdoor fan motor
- 10.3.2.6 Removing electrical box
- 10.3.2.7 Removing the compressor
- 10.3.2.8 Removing the High pressure switch and Pressure switch for control
- 10.3.2.9 Opening electrical box (P plate)
- 10.3.2.10 Removing Reversing valve coil
- 10.3.2.11 Removing electronic expansion valve coil
- 10.3.2.12 Removing solenoid valve coil (SVA and SVC)
- 10.3.2.13 Removing reversing valve
- 10.3.2.14 Removing Electronic expansion Valve and Solenoid Valve
- 10.3.2.15 Removing electrical components
- 10.3.2.16 Removing other electrical components
- 10.3.3 Oudoor units RAS-(8-10)HNPE
- 10.3.3.1 Removing service cover
- 10.3.3.2 Removing air outlet grille
- 10.3.3.3 Removing upper cover
- 10.3.3.4 Removing the bottom service cover and rear cover
- 10.3.3.5 Removing outdoor fan motor
- 10.3.3.6 Removing electrical box
- 10.3.3.7 Removing the compressor
- 10.3.3.8 Removing High pressure switch and pressure switch for control
- 10.3.3.9 Opening electrical box (P-Mounting Plate)
- 10.3.3.10 Removing reversing valve coil
- 10.3.3.11 Removing electronic expansion valve coil
- 10.3.3.12 Removing solenoid valve coil (SVA and SVC)
- 10.3.3.13 Removing reversing valve
- 10.3.3.14 Removing Electronic expansion Valve and Solenoid Valve
- 10.3.3.15 Removing electrical components
- 10.3.3.16 Removing other electrical components
- 10.3.4 Outdoor Units RAS-12HNP
- 10.3.4.1 Removing service cover
- 10.3.4.2 Removing air outlet grille
- 10.3.4.3 Removing upper cover
- 10.3.4.4 Removing the bottom service cover and rear cover
- 10.3.4.5 Removing outdoor fan motor
- 10.3.4.6 Removing electrical box
- 10.3.4.7 Removing the compressor
- 10.3.4.8 Removing High pressure switch and pressure switch for control
- 10.3.4.9 Removing reversing and solenoid valves coils
- 10.3.4.10 Removing electronic expansion valve coil
- 10.3.4.11 Removing reversing valve
- 10.3.4.12 Removing Electronic expansion Valve and Solenoid Valve
- 10.3.4.13 Removing electrical components
- 10.3.4.14 Removing other electrical components
- 10.3.1 Outdoor unit RAS-3HVNPE
- 10.4 Servicing for Standard Series
- 10.4.1 Outdoor Units RAS-(4-6)H(V)NCE
- 10.4.1.1 Removing service cover
- 10.4.1.2 Remove outlet grille
- 10.4.1.3 Removing upper cover
- 10.4.1.4 Removing bottom service cover and rear cover
- 10.4.1.5 Removing outdoor fan motor
- 10.4.1.6 Removing electrical box
- 10.4.1.7 Removing the compressor
- 10.4.1.8 Removing the High pressure switch and Pressure switch for control
- 10.4.1.9 Opening electrical box (P plate)
- 10.4.1.10 Removing Reversing valve coil
- 10.4.1.11 Removing electronic expansion valve coil
- 10.4.1.12 Removing solenoid valve coil (SVA)
- 10.4.1.13 Removing reversing valve
- 10.4.1.14 Removing Electronic expansion valve and Solenoid valve
- 10.4.1.15 Removing electrical components
- 10.4.1.16 Removing other electrical components
- 10.4.2 Outdoor Units RAS-(8-10)HNCE
- 10.4.2.1 Removing service cover
- 10.4.2.2 Removing air outlet grille
- 10.4.2.3 Removing upper cover
- 10.4.2.4 Removing the bottom service cover and rear cover
- 10.4.2.5 Removing outdoor fan motor
- 10.4.2.6 Removing electrical box
- 10.4.2.7 Removing the compressor
- 10.4.2.8 Removing High pressure switch and pressure switch for control
- 10.4.2.9 Opening electrical box (P-Mounting Plate)
- 10.4.2.10 Removing reversing valve coil
- 10.4.2.11 Removing electronic expansion valve coil
- 10.4.2.12 Removing solenoid valve coil (SVA)
- 10.4.2.13 Removing reversing valve
- 10.4.2.14 Removing Electronic expansion Valve and Solenoid Valve
- 10.4.2.15 Removing electrical components
- 10.4.2.16 Removing other electrical components
- 10.4.3 Outdoor Units RAS-12HNC
- 10.4.3.1 Removing service cover
- 10.4.3.2 Removing air outlet grille
- 10.4.3.3 Removing upper cover
- 10.4.3.4 Removing the bottom service cover and rear cover
- 10.4.3.5 Removing outdoor fan motor
- 10.4.3.6 Removing electrical box
- 10.4.3.7 Removing High pressure switch and pressure switch for control
- 10.4.3.8 Opening electrical box (P-Mounting Plate)
- 10.4.3.9 Removing reversing and solenoid valves coils
- 10.4.3.10 Removing electronic expansion valve coil
- 10.4.3.11 Removing reversing valve
- 10.4.3.12 Removing Electronic expansion Valve and Solenoid Valve
- 10.4.3.13 Removing electrical components
- 10.4.3.14 Removing other electrical components
- 10.4.1 Outdoor Units RAS-(4-6)H(V)NCE
- 11. Electrial checks of main parts
- 12. Maintenance notes
- 12.1 General notes
- 12.1.1 Checking the power source and the wiring connection
- 12.1.2 Burnt-out compressor due to an insufficient refrigerant charge
- 12.1.3 Insufficient cooling performance when a long piping is applied
- 12.1.4 Abnormally high operation sound (in the ceiling type indoor unit).
- 12.1.5 Alarm code “31”
- 12.1.6 Not cooling well due to insufficient installation space for the outdoor unit
- 12.2 Maintenance work
- 12.3 Service and maintenance record
- 12.4 Service and maintenance record using the 7-segment display
- 12.5 Service and maintenance record by remote control switch
- 12.6 Pump-down method for replacing the compressor
- 12.1 General notes
- General information
- Safety
- Product guide
- Safety summary
- Transportation of outdoor unit
- Center of gravity
- Factory-supplied accessories for RAS-12HN(P/C)
- Installation space (Initial ckeck)
- Place provision
- Optional parts and installation
- General notes before performing pipe work
- Piping connection for outdoor unit
- Refrigerant piping range
- Refrigerant charge
- Caution in case of refrigerant leakage
- Piping work for compatibility with the piping of current installations where is used R22 or R407C.
- Drain piping
- General notes
- Electrical wiring connection for the outdoor unit
- Setting the DIP switches for the outdoor unit
- Common wiring
- H-LINK II system
- System Control
- Electrical wiring diagrams
- RAS-(2-2.5)HVNP / RAS-3HVNC (1~ 230V 50Hz)
- RAS-3HVNPE (1~ 230V 50Hz)
- RAS-(4-6)HVNPE (1~ 230V 50Hz)
- RAS-(4-6)HNPE (3N~ 400V 50Hz)
- RAS-(4-6)HVNCE (1N~ 230V 50Hz)
- RAS-(4-6)HNCE (3N~ 400V 50Hz)
- RAS-(8-10)HN(P/C)E (3N~ 400V 50Hz)
- RAS-12HNP (3N~ 400V 50Hz) - Preliminary data
- RAS-12HNC (3N~ 400V 50Hz) - Preliminary data
- Device control system
- Outdoor units PCB
- Protection and safety control
- Standard operation sequence
- Standard control functions
- Freezing protection during cooling process or dry operation
- Prevention Control for High Pressure Increase during Cooling Operation
- Prevention control for excessively high discharge gas temperature
- Activation for protection device control
- Preheating control of compressor
- Prevention control for high pressure increase
- Optional input and output signals (By 7-segment display)
- Optional functions (By 7-segment display)
- Optional functions (By remote control switch)
- Checking procedure before the test run
- Test run procedure using the remote control switch (PC-ART)
- Test run procedure using the remote control switch (PC-ARF)
- Test run procedure using the wireless remote control switch (PC-LH3A/B)
- Test run procedure from the outdoor unit side
- Check list
- Initial troubleshooting
- Troubleshooting procedure
- Troubleshooting in check mode
- Checking procedure for main parts
- RAS-(2-2.5)HVNP
- RAS-3HVNC
- RAS-3HVNPE
- RAS-(4-6)H(V)NPE
- RAS-(4-6)H(V)NCE
- RAS-(8-10)HN(P/C)E
- RAS-12HN(P/C)
- Introduction
- Servicing for Outdoor Units RAS-(2-2.5)HVNP and RAS-3HVNC
- Servicing for Premium series
- Outdoor unit RAS-3HVNPE
- Removing service cover
- Remove outlet grille
- Removing upper cover
- Removing bottom service cover and rear cover
- Removing outdoor fan motor
- Removing electrical box
- Removing the compressor
- Removing the High pressure switch and Pressure switch for control
- Opening electrical box (P plate)
- Removing Reversing valve coil
- Removing electronic expansion valve coil
- Removing solenoid valve coil (SVC)
- Removing reversing valve
- Removing Electronic expansion Valve and Solenoid Valve
- Removing electrical components
- Removing other electrical components
- Outdoor units RAS-(4-6)H(V)NPE
- Removing service cover
- Removing air outlet grille
- Removing upper cover
- Removing the bottom service cover and rear cover
- Removing outdoor fan motor
- Removing electrical box
- Removing the compressor
- Removing the High pressure switch and Pressure switch for control
- Opening electrical box (P plate)
- Removing Reversing valve coil
- Removing electronic expansion valve coil
- Removing solenoid valve coil (SVA and SVC)
- Removing reversing valve
- Removing Electronic expansion Valve and Solenoid Valve
- Removing electrical components
- Removing other electrical components
- Oudoor units RAS-(8-10)HNPE
- Removing service cover
- Removing air outlet grille
- Removing upper cover
- Removing the bottom service cover and rear cover
- Removing outdoor fan motor
- Removing electrical box
- Removing the compressor
- Removing High pressure switch and pressure switch for control
- Opening electrical box (P-Mounting Plate)
- Removing reversing valve coil
- Removing electronic expansion valve coil
- Removing solenoid valve coil (SVA and SVC)
- Removing reversing valve
- Removing Electronic expansion Valve and Solenoid Valve
- Removing electrical components
- Removing other electrical components
- Outdoor Units RAS-12HNP
- Removing service cover
- Removing air outlet grille
- Removing upper cover
- Removing the bottom service cover and rear cover
- Removing outdoor fan motor
- Removing electrical box
- Removing the compressor
- Removing High pressure switch and pressure switch for control
- Removing reversing and solenoid valves coils
- Removing electronic expansion valve coil
- Removing reversing valve
- Removing Electronic expansion Valve and Solenoid Valve
- Removing electrical components
- Removing other electrical components
- Outdoor unit RAS-3HVNPE
- Servicing for Standard Series
- Outdoor Units RAS-(4-6)H(V)NCE
- Removing service cover
- Remove outlet grille
- Removing upper cover
- Removing bottom service cover and rear cover
- Removing outdoor fan motor
- Removing electrical box
- Removing the compressor
- Removing the High pressure switch and Pressure switch for control
- Opening electrical box (P plate)
- Removing Reversing valve coil
- Removing electronic expansion valve coil
- Removing solenoid valve coil (SVA)
- Removing reversing valve
- Removing Electronic expansion valve and Solenoid valve
- Removing electrical components
- Removing other electrical components
- Outdoor Units RAS-(8-10)HNCE
- Removing service cover
- Removing air outlet grille
- Removing upper cover
- Removing the bottom service cover and rear cover
- Removing outdoor fan motor
- Removing electrical box
- Removing the compressor
- Removing High pressure switch and pressure switch for control
- Opening electrical box (P-Mounting Plate)
- Removing reversing valve coil
- Removing electronic expansion valve coil
- Removing solenoid valve coil (SVA)
- Removing reversing valve
- Removing Electronic expansion Valve and Solenoid Valve
- Removing electrical components
- Removing other electrical components
- Outdoor Units RAS-12HNC
- Removing service cover
- Removing air outlet grille
- Removing upper cover
- Removing the bottom service cover and rear cover
- Removing outdoor fan motor
- Removing electrical box
- Removing High pressure switch and pressure switch for control
- Opening electrical box (P-Mounting Plate)
- Removing reversing and solenoid valves coils
- Removing electronic expansion valve coil
- Removing reversing valve
- Removing Electronic expansion Valve and Solenoid Valve
- Removing electrical components
- Removing other electrical components
- Outdoor Units RAS-(4-6)H(V)NCE
- Inverter
- Thermistor
- Electronic expansion valve
- High pressure protection device
- Noise filter (NF)
- Capacitor (CB1 CB2)
- Reactor (DCL)
- Scroll compressor
- General notes
- Checking the power source and the wiring connection
- Burnt-out compressor due to an insufficient refrigerant charge
- Insufficient cooling performance when a long piping is applied
- Abnormally high operation sound (in the ceiling type indoor unit).
- Alarm code “31”
- Not cooling well due to insufficient installation space for the outdoor unit
- Maintenance work
- Service and maintenance record
- Service and maintenance record using the 7-segment display
- Service and maintenance record by remote control switch
- Pump-down method for replacing the compressor
8. Troubleshooting
259
SMGB0079 rev.0 - 01/2013
8
Self-checking procedure of PCB by means of the Remote Control Switch
Use the following troubleshooting procedure for testing the PCB in the indoor unit and the outdoor unit:
Stop operation
PCB check mode
Press
Press both swit-
ches for three se-
conds
Indication of unit number
Operating automatic
PCB check
(ex.) Indication of unit No. “0”
After 7 seconds
After approx 5 seconds (max 30 seconds in case of
a transmission failure between the indoor unit and
the outdoor unit).
Max three types of abnormal operations indicated.
Abnormal operation (1)
After 1 second
Abnormal operation (2)
After 1 second
Abnormal operation (3)
After 1 second
To next page
Indi-
cation
Contents
00
Normal
Abnormality (open-circuit, short-circuit, etc.) in circuit for:
01
Air inlet temperature thermistor
Indoor unit PCB
02
Discharge air temperature thermistor
03
Liquid pipe temperature thermistor
04
Remote thermistor abnormality
05
Gas pipe temperature thermistor
06
Remote sensor
08
Transmission of central station
0A
EEPROM
b
Zero cross input failure
EE
Transmission of indoor units during this
checking operation
07
Transmission of outdoor unit
Outdoor unit PCB
F4
Internal thermostat fan input failure
F5
PSW input failure
F6
PSH protection signal detection circuit
F7
Phase detection
F8
Transmission of inverter
FA
High-pressure sensor
Fb
Compressor discharge gas temperature
thermistor
FC
Low-pressure sensor
Fd
Heat exchanger evaporation temperature
thermistor
FF
Ambient air temperature thermistor