Dc Link Voltage Sensor Error - Samsung AM009FN1DCH/AA Service Manual

Troubleshooting

4-4-77 DC Link voltage sensor error

Outdoor unit display
Judgment Method · DC voltage detection : Judged as an error if the detected value is more than 2.8V or 0.2V less than
· Input voltage defective
· AC Power wiring error
Cause of problem
· Momentary Overvoltage / Low voltage occurs
· PCB voltage sensing circuit defective
1. Cause of problem
Is Power connection accurately connected?
Is Reactor accurately connected?
Is EMI PCB and Inverter PCB
Fan PCB DC-Link voltage connection wire
The case of E396, E498
4-102
(INVERTER1 PCB)
(OUTDOOR FAN 1 PCB)
Power Off
Yes
Yes
Did the Fuse is short?
No
accurately connected?
Yes
Is Inverter PCB and
accurately connected?
Yes
Replace Inverter PCB
(INVERTER2 PCB)
(OUTDOOR FAN 2 PCB)
No
Power Cable re-connection
No
Check the Reactor connection
Yes
No
Power Off and then re-connection
The case of E396, E498
No
Replace Fuse
Replace Fan PCB
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