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SiUS091601EA
Troubleshooting for Outdoor Unit
Part 6 Service Diagnosis
170
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
NO
YES
Turn off the power.
Check the connection.
Check the power supply voltage.
Correct the power supply.
(R22764)
NO
NO
NO
NO
YES
YES
YES
YES
Check No. 20
Check the short circuit of the diode
bridge.
Check No.15
Check with the inverter analyzer.
Turn off the power. Disconnect the
harnesses U, V, and W.
Turn on the power. Check the
electrolytic capacitor voltage.
Electrical
components or
compressor harnesses
connected as
specified?
Replace the outdoor unit
PCB (main PCB).
Correct the power supply or
replace the outdoor unit
PCB (main PCB).
Replace the compressor.
Reconnect the electrical
components or compressor
harnesses as specified.
Replace the outdoor unit
PCB (main PCB).
Inverter analyzer:
RSUK0917C
Normal?
NO
YES
Check No. 18
Check the discharge pressure.
Replace the stop valve.
OK?
Within 320 VDC?
Any LED Off?
+ 100
– 50
Is the
power supply
voltage fluctuation within
±10% from the rated
value?
Summary of Contents for FTX-N Series
Page 18: ...SiUS091601EA 13 Part 2 Specifications 1 Specifications 14 Part 2 Specifications...
Page 198: ...Check SiUS091601EA 193 Part 6 Service Diagnosis 18 24 class R24538 1 2 3 4 Multimeter...
Page 201: ...SiUS091601EA Check Part 6 Service Diagnosis 196 18 24 class R24539 DC DC W V U...
Page 229: ...SiUS091601EA Piping Diagrams Part 8 Appendix 224 RXL15QMVJU RXL18UMVJU 3D100007 3D123368...
Page 230: ...Piping Diagrams SiUS091601EA 225 Part 8 Appendix RXL24UMVJU 3D107985A...