Samsung AM280FNHDEH - Page 238

Troubleshooting
238 Samsung Electronics
4-4-12 EEV(Electronic Expansion Valve) opening malfunction (2nd stage)
1. How to diag nose
Detect only on cooling operation. (No detection during heating operation.)
During Cooling operation, the temperature of the inlet or outlet of stopped Heat Exchanger is kept lower than 0˚C for more than 20 minutes with-
out cessation.
2. How to check
Outdoor unit display
1st detection : P703 (Outdoor Unit display only)
2nd det ection :
x x x
(
x x x
: The address of the error oc curred indoor unit )
Indoor unit display
×(Operation)
◑
(Timer)
◑
(Fan)
◑
(Filter)
×
(Defrost)
Criteria
 Refer to the judgment method below.
Cause of problem
 Faulty Indoor Unit EEV action. (Refrigerant will leak into the stopped Indoor Unit.)
No
Connect to PCB and restart operation.
No
Connect the EEV coil properly and
restart operation.
Yes
Replace EEV coil.
No
Normal operation of EEV.
Is the EEV wire connected to the PCB?
Is the EEV coil
connected to the main body
properly?
After measuring
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?
Replace EEV coil
Yes
Yes
No
Yes
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- Hydro Unit PCB k1, k2 switch : At the same time push for more than
4 seconds.
- After resolving the cause of the error, restart operation.
(Excessive reset operation, can cause damage to the Heat Exchanger.)