Troubleshooting
4-120 Samsung Electronics
4-4-77 DC Link voltage sensor error
Outdoor unit display
(INVERTER1 PCB) (INVERTER2 PCB)
(OUTDOOR FAN 1 PCB) (OUTDOOR FAN 2 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
Input voltage defective
AC Power wiring error
Momentary Overvoltage / Low voltage occurs
PCB voltage sensing circuit defective
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 the Fuse is short?
Replace Fuse
Yes
Yes
Is EMI PCB and Inverter PCB
accurately connected?
Power Off and then re-connection
No
Yes
Is Inverter PCB and
Fan PCB DC-Link voltage connection wire
accurately connected?
Replace Fan PCB
No
1.
Cause of problem
Replace Inverter PCB
The case of E396, E498
The case of E396, E498
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