Compressor System Sensor Abnormality - Daikin FTXS30HVJU Service Manual

Troubleshooting

4.16 Compressor System Sensor Abnormality

H0
Remote
Controller
Display
 Fault condition is identified by the supply voltage and the DC voltage which is detected before
Method of
Malfunction
 Fault condition is identified by compressor current which is detected right after the compressor
Detection
 The detected valve of the supply voltage and the DC voltage is obviously low or high.
Malfunction
 The compressor current does not run when the compressor is started.
Decision
Conditions
 Reactor disconnection
Supposed
 Compressor disconnection
Causes
 Outdoor unit PCB defective
 Compressor defective
Troubleshooting
90
the compressor startup.
startup.
Be sure to turn off the power switch before connecting or disconnecting
Caution
the connector, or parts damage may occur.
Turn off the power
Reactor connection check
Connection OK?
YES
Compressor connection check
Connection OK?
YES
Reactor check
10W or less?
YES
Compressor check
Between each
terminal 10W 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 use the
tester to measure the resistance value
between the 3 terminals of the compressor.
NO
SiUS04-924
Connect properly.
Connect properly.
Replace the reactor.
Replace the compressor or
the compressor relay
harness
Check the operation again
and if the error appears
again, replace the outdoor
unit PCB
(R7174)
Service Diagnosis