Troubleshooting
4-112
Samsung Electronics
4-4-87 Electronic expansion valve closing malfunction (2
nd
stage)
Indoor unit display
Cause of problem
×(Operation)
(Reservation)
(Blast)
(Filter) ×(Defrost)
t
Faulty indoor unit electronic expansion valve action (valve will not open)
t
Address setup error in indoor unit (RAC) using EEV KIT"
Criteria
t
Please refer to determining method below
Outdoor unit display
1
st
stage inspection:
(only displays on outdoor unit)
2
nd
stage inspection:
x x x (x x x: error occurred)
1. Inspection Method
Is the electronic expansion valve
wire connected to the PCB?
After measuring the
coil terminal resistance, is there a disconnection
or short circuit inside the coil?
Is the electronic
expansion valve coil connected to the
main body properly?
After Resetting the outdoor unit,
does an error occur even after running it again with
the same combination?
Connect to PCB and run again
No
No
Yes
No
No
Yes
No
Yes
Connect the electronic expansion valve
coil properly and run again
Replace electronic expansion valve coil
When EEV KIT was used,
was its Address setting accurate?
Replace electronic expansion valve
Normal operation of electronic
expansion valve
Reset EEV KIT's Address
Yes
Yes
