SiUS331708EA
Servicing Items to be Confirmed
Service Diagnosis
142
1. Servicing Items to be Confirmed
1.1
Troubleshooting
(1) Initial verification and troubleshooting
1. Properly understand the end user's needs and issues.
2. Check the cause of errors according to the description provided by the end user.
3. Check if the remote controller displays any error codes.
(Or use the outdoor unit monitoring mode to check for errors).
↓
4. If there is no display of error codes, refer to
Symptom-based Troubleshooting
for diagnosis.
If an error code is displayed, refer to troubleshooting flowchart for diagnosis.
(2) Take appropriate measures.
1. Repair the defect or replace the parts according to the troubleshooting results.
2. Turn off the power supply for 10 minutes before disassembling.
3. The refrigerant has to be collected before refrigerant system components are replaced.
(3) Verification after taking appropriate measures
1. Run the unit after repairing the defect to confirm normal unit operation.
2. Record the check results and inform the client.
1.2
Precautions for Maintenance
Pay attention to the following matters in servicing.
(1) Precaution for maintenance
Touch the paint-free metal part of the product (electrical box lid of the standard model; tap bolts of electrical box of anti-
corrosion and heavy anti-corrosion models) to release static electricity before starting work.
(2) Precautions for maintaining the service cover
After maintenance, make sure to close the service cover.
(Otherwise, leakage of water or contamination by foreign matter may cause defects)
(3) Precautions for maintaining the electrical box
1. Turn off the power for 10 minutes before opening the cover of the electrical box.
2. After opening the cover, use the tester to measure the terminal voltage of the power supply terminal to make sure that
the power has been cut.
Then check if the circuit capacitor voltage is under 50 VDC.
3. To avoid PCB defects, touch the earth terminal of the electrical box with your hand when unplugging the connector to
release static electricity.
4. Unplug the relay connectors X106A and X107A (RXSQ60TAVJU only) of the outdoor fan motor.
When unplugging the relay connectors, do not touch the live parts.
(When the outdoor fan is rotating because of strong wind, there is a risk of electric shock due to main circuit board
capacitor power storage.)
5. After maintenance, reconnect the relay connectors of the outdoor fan in their original positions.
·
Otherwise, the remote controller will display error code
E7
, preventing normal operation.
(4) Precautions for piping work and refrigerant charging:
This unit uses R-410A refrigerant. Pay attention to the following conditions.
1. The charging pipe and the manifold tube use R-410A products for pressure maintenance and avoiding contamination
by impurities (SUNISO oil, etc.).
2. Be sure to purge with nitrogen when brazing.
·
Properly perform airtightness test and vacuum drying. (Airtight test pressure: 4.0 MPa (580 psi))
·
Charge refrigerant in liquid state.
Summary of Contents for RXSQ24TAVJU
Page 1: ...Service Manual SiUS331708EA RXSQ24 36 48 60TAVJU Heat Pump 60 Hz...
Page 290: ...Wiring Diagrams SiUS331708EA 277 Appendix RXSQ48TAVJU 3D109546A...
Page 291: ...SiUS331708EA Wiring Diagrams Appendix 278 RXSQ60TAVJU 3D109547A...
Page 295: ...SiUS331708EA Wiring Diagrams Appendix 282 FXZQ05 07 09 12 15 18TAVJU 3D110443A...
Page 298: ...Wiring Diagrams SiUS331708EA 285 Appendix FXEQ07 09 12 15 18 24PVJU 3D098557A...
Page 300: ...Wiring Diagrams SiUS331708EA 287 Appendix FXSQ05 07 09 12 15 18 24 30 36 48 54TAVJU 3D110467B...
Page 301: ...SiUS331708EA Wiring Diagrams Appendix 288 FXMQ07 09 12 15 18 24 30 36 48 54PBVJU 3D093209B...
Page 302: ...Wiring Diagrams SiUS331708EA 289 Appendix FXHQ12 24 36MVJU 3D048116C...
Page 303: ...SiUS331708EA Wiring Diagrams Appendix 290 FXAQ07 09 12 18 24PVJU 3D075354C...
Page 309: ...SiUS331708EA Wiring Diagrams Appendix 296 VAM1200GVJU 3D073270D...