Troubleshooting
Samsung Electronics 4-23
Outdoor unit display
Main PCB has no power phenomenon (7-seg does not blink)
Judgment Method
Water Hub PCB power and connection wire to detect.
Cause of problem
1) Water Hub PCB connector wire defects and the connection is not.
2) Main PCB defective.
3) High pressure switch operation
4) Water Hub PCB defective.
1. How to check
Replace Main PCB
Check the connection status of EMI PCB.
Check the short circuit of EMI PCB Fuse.
Refrigerant overcharge?
High pressure switch is defective.
No
No
Yes
Yes
Yes
Is Water Hub PCB CN102 connected by AC220V?
Is high pressure switch normal?
Check the Main PCB and Water Hub
PCB power wire.
No
Yes
Were Main PCB CN101 and Water Hub PCB
CN102 connected correctly?
Power On
غ AM038/048/055KXWD
✳✳
4-4-2 Main PCB has no power phenomenon
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