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TROUBLESHOOTING - GENERAL
PROBLEM : Power ON/OFF switch does not illuminate when turned on.
PROBABLE CAUSE
No power in the AC outlet
AC side fuse inside the power
supply is blown
PROBLEM : AC side fuse blows as soon as power is turned on.
PROBABLE CAUSE
Unit is defective
PROBLEM : The output voltage is 0 V or very low
PROBABLE CAUSE
Input voltage is very low
The unit is in current limit condition
due to overload caused by large reactive
loading or by the output being short
circuited
Unit is shut down due to over
temperature.
PROBLEM : Output voltage drops as soon as the load is switched on
PROBABLE CAUSE
The unit is going into current
limit protection mode
SUGGESTED REMEDY
Check there is power in the outlet.
Replace the fuse inside the unit.
See fuse ratings at page 11
SUGGESTED REMEDY
Call technical support.
SUGGESTED REMEDY
Check that the input voltage is 120VAC
Check the output terminals are not
shorted. Remove the load. If the
output voltage gets restored, the
load is shorted or is offering large
reactive impedance.
Check that the fan has not failed or
the vent openings are not blocked
SUGGESTED REMEDY
Reduce the load current
to less than the current limit value.
Motors, pumps, compressors, relays,
incandescent and halogen lamps and
large capacitors in the input section of
the DC devices draw very high inrush
or starting currents of up to 10 times
their normal operating currents.
Ensure that these inrush/starting
currents are below the current limit
value of the power supply.
6.
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