Daikin K-Series Service Manual page 108

SiBE061121.book Page 98 Monday, April 25, 2011 3:21 PM
Troubleshooting
4.17.2 50 Class
H0
Remote
Controller
Display
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
98
The system checks the supply voltage and the DC voltage before the compressor starts.
The system checks the compressor current right after the compressor starts.
The supply voltage and the DC voltage is obviously low or high.
The compressor current does not run when the compressor starts.
Disconnection of reactor
Disconnection of compressor harness
Defective outdoor unit PCB
Defective compressor
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.
NO
Connection OK?
YES
Check the connection of the
compressor.
NO
Connection OK?
YES
Disconnect the reactor from the outdoor
unit PCB and measure the resistance
Check the reactor.
value between reactor terminals with
tester.
NO
10 Ω or less?
YES
Disconnect the compressor relay harness
from the outdoor unit PCB and measure
Check the compressor.
the resistance value between the each 3
terminals of the compressor with tester.
Between all
NO
each terminal 10 Ω or
less?
YES
SiBE061121
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