Samsung AM032MNQDCH/AA Service Manual page 329

System air conditioner indoor unit
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4-4-87 Electronic expansion valve closing 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 (valve will not open)
Cause of problem
∙ Address setup error in indoor unit (RAC) using EEV KIT
1. Inspection Method
Is the electronic expansion valve
wire connected to the PCB?
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
Samsung Electronics
(only displays on outdoor unit)  
(Reservation)
Yes
Is the electronic
main body properly?
Yes
After measuring the
No
Yes
Yes
nd
stage)
x x x ( x x x: 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
Troubleshooting
4-129

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Troubleshooting

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