Daikin FTXS20G2V1B Service Manual page 137

Troubleshooting
4.16.2 50 Class
H0
Remote Control
Display
„ The system checks the supply voltage and the DC voltage before the compressor starts.
Method of
„ The system checks the compressor current right after the compressor starts.
Malfunction
Detection
„ The supply voltage and the DC voltage is obviously low or high.
Malfunction
„ The compressor current does not run when the compressor starts.
Decision
Conditions
„ Disconnection of reactor
Supposed
„ Disconnection of compressor harness
Causes
„ Defective outdoor unit PCB
„ Defective compressor
Troubleshooting
125
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 connection of the
reactor.
Connection OK?
YES
Check the connection of the
compressor.
Connection OK?
YES
Check the reactor.
10 Ω or less?
YES
Check the compressor.
Between all each
terminal 10 Ω or less?
YES
NO
NO
Disconnect the reactor from the outdoor
unit PCB and measure the resistance
value between reactor terminals with
tester.
NO
Disconnect the compressor relay harness
from the outdoor unit PCB and measure
the resistance value between the each 3
terminals of the compressor with tester.
NO
SiENBE04-808_A
Connect it properly.
Connect it properly.
Replace the reactor.
Replace the compressor or
the compressor relay
harness.
Restart the operation again
and if the error occurs
again, replace the outdoor
unit PCB.
(R7174)
Service Diagnosis