Electronic Expansion Valve Closing Malfunction (2Nd Stage) - Samsung AM045NN4DEH Series Service Manual

Troubleshooting

4-4-88 Electronic expansion valve closing malfunction (2nd stage)

Outdoor unit display
Indoor unit display
Criteria
Cause of problem
1. Inspection Method
Is the electronic expansion valve
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
was its Address setting accurate?
Replace electronic expansion valve
136
st
1 stage inspection:
nd
2 stage inspection:
×(Operation) (Reservation)
• Please refer to determining method below
• Faulty indoor unit electronic expansion valve action (valve will not open)
• Address setup error in indoor unit (RAC) using EEV KIT
wire connected to the PCB?
Yes
Is the electronic
main body properly?
Yes
After measuring the
No
the same combination?
Yes
When EEV KIT was used,
Yes
(only displays on outdoor unit)
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
No
expansion valve
Reset EEV KIT's Address
Samsung Electronics