Troubleshooting
4-78
Samsung Electronics
4-3-48 Overvoltage / Low voltage error
Outdoor unit display
(INVERTER1 PCB)
(INVERTER2 PCB)
Judgment Method
∙ Input wiring error EMI fuse open.
∙ DC-Link Overvoltage / Low voltage occurs.
Cause of problem
∙ Check the input wiring
∙ EMI Fuse OPEN
1. Cause of problem
Power Cable re-connection
No
Yes
Is Power connection accurately conected
Power Off
Check the connector
connection
No
Yes
Is EMI PCB R,S,T Wire and Terminal-block
connector accurately connected?
Replace Fuse or EMI PCB
No
Yes
Did the Fuse is open
No
Yes
Is Reactor accurately connected
Check the Reactor
connection
No
Yes
Is Inverter PCB R,S,T Wire and EMI PCB CN21
connector accurately connected?
Power Off and then
re-connection
Replace Inverter PCB
EMI PCB R,S,T Wire and
Terminal-block connector
Type of Power Source
AC Input Voltage
Standard AC Voltage(Vac)
Standard DC Voltage(Vdc)
Min.
Max.
Min.
Max.
F
208~230V
177
265
250
374
J
460V
391
552
553
781
