382260-EN V1.5 7/12
7
Trouble Shooting
PROBLEM INDICATIONS POSSIBLE
CAUSES
SUGGESTED
SOLUTIONS
Power supply not
working
Panel display, LED
Indicators not on
A. AC power input not
connected
B. AC
input
fuse
blown
A. Check
AC
power
connection,
B. Contact
factory
No DC output power
Voltage meter zero
indication.
ALM (13) Alarm led on
CC (12) led on
A. Output on off button
not on .
B. UVL (10 )
protection triggered
C. OTP
protection
triggered
D. Output
short
circuit
A. Check output LED
(9) is on or not,
push (9) to on.
B. C h e c k U V L s e t
voltage by pushing
(6), re-set UVL to
applicable limit.
C. Check vent holes at
top and bottom is
clear, ambient
temperature too
high
D. Check and undo
short circuit of
output connection.
Voltage meter reading
grossly inaccurate
Actual output voltage is
grossly different from
the meter read out
A. Volt
meter
shows
not the output
voltage.
B. Possible
misalignment in
voltmeter
calibration
A . C h e c k t h e L E D
indicator of UVL on
the top right hand
side of the Volt
meter, if it lights up
then the volt
meter only shows
the set UVL value.
Push (6) to go
back to output
voltage.
B . Contact factory
Ampere meter reading
grossly inaccurate
In CV mode , the actual
current measured is
grossly different from
the Amp meter reading
Possible misalignment
in calibration .
Contact factory
The activated
(auto- cross over )
current limiting value
is different from the
preset cc value
All indicators and
display are normal ,
only CC mode has the
problem
For stand alone unit,
Master & Slave
Switch (17) in wrong
position (Slave). Wrong
setting or connection in
Master & S l a v e o r
s e t u p procedure.
Check the Master &
Slave switch (17)
correct position. Use
stand alone mode to
check power supply
separately without any
connection to slave
u n i t s . F o l l o w t h e
procedure carefully and
make sure there is only
one Master unit.
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2012 Extech Instruments Corporation (a FLIR company)
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