Samsung AM032MNQDCH/AA Service Manual page 319

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?
Did the Fuse is short?
Is EMI PCB and Inverter PCB
accurately connected?
Is Inverter PCB and
Fan PCB DC-Link voltage connection wire
accurately connected?
Replace Inverter PCB
The case of E396, E498
Samsung Electronics
(INVERTER1 PCB)
(OUTDOOR FAN 1 PCB)
Power Off
Yes
Yes
No
Yes
Yes
(INVERTER2 PCB)
(OUTDOOR FAN 2 PCB)
No
Power Cable re-connection
No
Check the Reactor connection
Yes
Replace Fuse
No
Power Off and then re-connection
The case of E396, E498
No
Replace Fan PCB
Troubleshooting
4-119