NF HVA4321, Instruction Manual

Page: 129 / 152

6.1 When suspecting a fault
HVA4321
6-1
6.1 When suspecting a fault
If you suspect a fault like operation against expectation or strange operation, refer to the check list below.
Check for handling, operation method and connection. Before check, turn OFF the power switch
When the power is supplied
Problem Cause Action
Is the power supplied? Make sure that the power is
correctly supplied. Power is not ON.
Is the fuse blown? Replace the fuse.
When the internal high voltage DC power supply is ON
Problem Cause Action
Is the shorting plug at the back
inserted? Insert the shorting plug.
Is the current limiter set to the
minimum or TRIP? Increase the limiter set value or
change TRIP to LIMIT.
When the installation space for this
unit has high temperature or when
the unit is used at a high output for
a long time, the temperature sensor
in this unit may activate a
protection mode. Lower the temperature of the
installation area or leave the unit at a
cool place for cooling.
SIGNAL OFF remains
blinking.
If the cooling fan stops for some
reason, the unit automatically goes
to protection mode for safety. If the cooling fan stops, stop
operation immediately and contact
us.
When the HIGH VOLTAGE
POWER SUPPLY switch is
OFF, the HVPS ON LED
lights. The internal high voltage DC
power supply may be faulty. Stop operation immediately and
contact us.