Troubleshooting
402 Samsung Electronics
4-4-79 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
Ye s
Is Power connection accurately connected?
Power Cable re-connection
No
Ye s
Is Reactor accurately connected?
Check the Reactor connection
No
No
Did the Fuse is short?
Replace Fuse
Ye s
Ye s
Is EMI PCB and Inverter PCB
accurately connected?
Power Off and then re-connection
No
Ye s
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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