ANNEX I: TROUBLESHOOTING
Faulty
Reason/How to Check
What to do
Heavily overloaded.
Reduce the load to its rated capacity.
The load is short circuit.
Remove the load.
Input air breaker
trips off.
Air breaker is faulty.
Contact authorized dealer or manufacturer.
Overload protection.
Reduce the load to its rated capacity.
Under voltage protection.
Wait till the utility voltage returns to normal.
Over voltage protection.
Wait till the utility voltage returns to normal.
Over temperature protection.
Wait till the temperature returns to normal.
Contactor trips off.
Contactor is faulty.
Contact authorized dealer or manufacturer.
Wiring connection is loose.
Fasten the wiring connection.
Input frequency is out of
range (45-65Hz).
Stop to use the voltage regulator until the
input frequency backs to normal.
Control board is faulty.
Contact authorized dealer or manufacturer.
Output voltage is
out of range while
contactor not trips
off.
Contactor is faulty.
Contact authorized dealer or manufacturer.
Input phase sequence is
wrong.
Make the correct connection.
Voltage regulator
can not be switched
on.
Manual bypass switch is
at "OFF" position
Put it at the "AVR" or "II" position.
Temperature of winding
does not reach to 55°C.
It's normal, not faulty.
Connection of cooling fan
is loose.
Fasten the connection of cooling fan.
Cooling fan is not
running.
Fan is faulty
Contact authorized dealer or manufacturer.
Surface of transformer is
not smooth.
Use abrasive tape to smoothen the surface.
Sparkle comes from
variable auto-
transformer.
Carbon brush set is faulty.
Contact authorized dealer or manufacturer.
Smoke comes from
inside cabinet.
Inside parts/components
are damaged.
Contact authorized dealer or manufacturer.
Bad smell comes
from inside cabinet.
Inside parts/components
are damaged.
Contact authorized dealer or manufacturer.
For any faulty out of above table, please contact the authorized dealer or
manufacturer immediately!
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