SiBE31-801_C Troubleshooting by Indication on the Remote Controller
Troubleshooting 232
4.6 “
A9
” Electronic Expansion Valve Malfunction / Dust
Clogging
Remote
Controller
Display
A9
Applicable
Models
FXFQ25~125P
Method of
Malfunction
Detection
Check coil condition of electronic expansion valve by using micro-computer.
Check dust clogging condition of electronic expansion valve main body by using micro-
computer.
Malfunction
Decision
Conditions
Pin input for electronic expansion valve coil is abnormal when initializing micro-computer.
Either of the following conditions is seen/caused/ occurs while the unit stops operation.
z
Temperature of suction air (R1T) – temperature of liquid pipe of heat exchanger (R2T)>8°C
z
Temperature of liquid pipe of heat exchanger (R2T) shows fixed degrees or below.
Supposed
Causes
Defective drive of electronic expansion valve
Defective PCB of indoor unit
Defective relay cables
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