Daikin FTXM-K Series Service Manual page 104

Troubleshooting
Troubleshooting
Check No.15
Refer to P.101
Check No.18
Refer to P.104
Check No.20
Refer to P.105
89
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Turn off the power.
Check the power supply voltage.
Voltage as rated?
YES
Check No. 18
Check the discharge pressure.
OK?
YES
Check No. 20
Check the short circuit of the diode
bridge.
Normal?
YES
Check the connection.
Electrical
components or
compressor harnesses
connected as
specified?
YES
Turn on the power. Check the
electrolytic capacitor voltage.
320 ± 50 VDC?
YES
Turn off the power. Disconnect the
harnesses U, V, and W.
Check No.15
Check with the inverter analyzer.
Any LED OFF?
YES
NO
NO
NO
NO
NO
∗ Inverter analyzer:
RSUK0917C
NO
SiBE041434E
Correct the power supply.
Replace the stop valve.
Replace the outdoor unit
PCB (main PCB).
Reconnect the electrical
components or compressor
harnesses as specified.
Replace the outdoor unit
PCB (main PCB).
Replace the compressor.
Correct the power supply or
replace the outdoor unit
PCB (main PCB).
(R20422)
Service Diagnosis