Daikin FTX20JV1B Service Manual page 87

SiBE041010EA
Troubleshooting
Check No.15
Refer to P.89
Check No.18
Refer to P.91
Check No.20
Refer to P.92
Service Diagnosis
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?
NO
NO
NO
NO
NO
NO
∗ Inverter analyzer:
RSUK0917C
YES
Troubleshooting
Correct the power supply.
Replace the stop valve.
Replace the outdoor unit
PCB.
Reconnect the electrical
components or compressor
harnesses as specified.
Replace the outdoor unit
PCB.
Correct the power supply
or replace the outdoor unit
PCB.
Replace the compressor.
(R18319)
76