D U P
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Electrical
Troubles
C 420 L
C 420 X
Alarm Diagnosis on Inverter
Display
To resume the operation reset the inverter (cut the power supply by turning main
switch QS1 to OFF), wait 20 sec., and restore the power
Maintenance And Repair 7-10
o
C
ou
U
u
1
o
H
o
l1
Overcurrent (OC)
Overvoltage (OV)
Main circuit undervoltage (UV1)
Radiation fin overheated (OH)
The temperature of the radiation fins of the Inverter has reached 110°C.
Motor overload (OL1)
The electric thermal relay actuated the motor overload protective
function.
