Troubleshooting
Samsung Electronics
61
4-4-12 EEV(Electronic Expansion Valve) opening malfunction (2nd stage)
1. How to diagnose
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
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
• How to turn off the Hydro Unit E151
- 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.)
Outdoor unit display
1st detection : P703 (Outdoor Unit display only)
2nd detection :
x x x (x x x : The address of the error occurred indoor unit )
Indoor unit display
Operation
Timer
Criteria
• Refer to the judgment method below.
Cause of problem
• Faulty Indoor Unit EEV action. (Refrigerant will leak into the stopped Indoor Unit.)
