Electronic Expansion Valve Opening Malfunction (2 Nd Stage) - Samsung AM007FN1DCH/AA Service Manual

4-4-88 Electronic expansion valve opening malfunction (2
Outdoor unit display
Indoor unit display
Criteria
Cause of problem
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?
unit, does an error occur even after running it again
was its Address setting accurate?
Replace electronic expansion valve
Samsung Electronics
st
1 stage inspection:
nd
2 stage inspection:
×(Operation) (Reservation)
• Please refer to determining method below
• Faulty indoor unit electronic expansion valve action (refrigerant will leak into the stopped indoor unit)
• Address setup error in indoor unit (RAC) using EEV KIT
Is the electronic
to the PCB?
Yes
Is the electronic
main body properly?
Yes
After measuring the
No
After Resetting the outdoor
with the same combination?
Yes
When EEV KIT was used,
Yes
nd stage)
(only displays on outdoor unit)
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
Yes
Replace electronic expansion valve coil
No
Normal operation of electronic
No
properly and run again
expansion valve
Reset EEV KIT's Address
Troubleshooting
4-121