Samsung AM072/096/120/144FXVAFH, Service Manual

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Troubleshooting
4-106 Samsung Electronics
Outdoor unit display
(INVERTER1 PCB)
Judgment Method
∙ DC voltage detection : Judged as an error if the detected value is more than 2.8V or 0.2V less than
Cause of problem
∙ Defective Input voltage
∙ AC power wiring error
∙ Momentary Overvoltage / Low voltage occurs
∙ Defective PCB voltage sensing circuit
1. How to check
Power off
Yes
Is power connection accurately connected?
Power cable re-connection
No
Yes
Is reactor accurately connected?
Check the reactor connection
No
No
Did fuse become short circuit?
Replace fuse
Yes
Yes
Is EMI PCB and inverter PCB accurately connected?
Power off and then re-connection
No
Replace inverter PCB
The case of E396, E498
غ
AM038/048/055KXWD
✳✳
DC Link voltage sensor error
(cont.)