Overvoltage / Low Voltage Error - Samsung AG042KSVANH Service Manual

4-3-36. Overvoltage / Low voltage error

Inverter / Hydro control part display
Judgment Method
Cause of problem
1. Inspection Method
Power Off
Is Power connection accurately conected
Is EMI PCB R,S,T Wire and Terminal-block
connector accurately connected?
Did the Fuse is open
Is Reactor accurately connected
Is Inverter PCB R,S,T Wire and EMI PCB CN21
connector accurately connected?
Replace Inverter PCB
(INVERTER1 PCB)
(INVERTER2 PCB)
∙ N-phase wiring error and EMI Fuse short.
∙ DC-Link Overvoltage / Low voltage occurs.
∙ Check the input wiring
∙ EMI Fuse short
Yes
Yes
Yes
Yes
Yes
No
Power Cable re-connection
No
Check the connector
connection
No
Replace Fuse or EMI PCB
No
Check the Reactor
connection
No
Power Off and then
re-connection
80
EMI PCB R,S,T Wire and
Terminal-block connector