Samsung AM032MNQDCH/AA Service Manual page 330

Troubleshooting
4-4-88 Electronic expansion valve opening malfunction (2
1 st stage inspection:
Outdoor unit display
2 nd stage inspection:
Indoor unit display ×(Operation)
∙ Please refer to determining method below
Criteria
∙ Faulty indoor unit electronic expansion valve action (refrigerant will leak into the stopped indoor unit)
Cause of problem
∙ Address setup error in indoor unit (RAC) using EEV KIT
1. Inspection Method
expansion valve wire connected
expansion valve coil connected to the
coil terminal resistance, is there a disconnection
or short circuit inside the coil?
After Resetting the outdoor
unit, does an error occur even after running it again
with the same combination?
When EEV KIT was used,
was its Address setting accurate?
Replace electronic expansion valve Replace electronic expansion valve
4-130
(only displays on outdoor unit)
(Reservation)
Is the electronic
to the PCB?
Yes
Is the electronic
main body properly?
Yes
After measuring the
No
Yes
Yes
nd stage)
x x x ( x x x: indoor unit address of where error occurred)
(Blast) (Filter) ×(Defrost)
No
Connect to PCB and run again
No
Connect the electronic expansion valve coil
properly and run again
Yes
Replace electronic expansion valve coil
No
Normal operation of electronic
expansion valve
No
Reset EEV KIT's Address Reset EEV KIT's Address
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