Dc Link Over Voltage/Low Voltage Error - Samsung AC052FBMDEH/EU Service Manual

4-5-15 DC Link Over voltage/Low voltage error

1. Checklist :
1) Is the power voltage normal?(Lightning, Power interruption etc.)
2) Is AC Power cable connection normal?(Detaching the wire)
2. Troubleshooting procedure
Is the AC Power cable connection to the
outdoor unit terminal block good?
Is the connection of reactor terminal good?
Are the FUSEs on EMI PCB blown?
Push the center bar of M/C and mesure
the resis-tance of each contact
Is each contact resistance normal? (less than 0.1ohm)
Does the error reappear frequently
The cause of this error may be power source trouble
as like power interruption.Check the power source
4-25
Yes
Yes
No
Yes
No
No
Check and reconnecting the AC power cable wire
Check and reconnecting the reactor wireat
No
the TAB terminal
Yes
Replace the blown FUSE
No
Exchange M/C
Yes
Exchange INVERTER PCB
Samsung Electronics