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4-2-5 Outdoor's service valve(Clog)
Indoor unit display
(Operation)
X (Defrost)
X (Timer)
(Fan)
(Filter)
Wire remote controller display
E422
Symptom
Clogging of outdoor's service valve
Valve clog
Failure
Yes
Is the outdoor service valve clogging?
Open the outdoor's service valve
No
Replace the PCB and restart the unit
Samsung Electronics
4-9
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Troubleshooting
