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83
-
507
-
013 Rev. D
72
SYMPTOM
CHECK
ACTION
REF
Output Voltage will not adjust.
Front panel CC LED is On.
Is the unit in constant current
mode?
Check Output Current
setting and load current.
5.2.1
5.2.2
Output Vol
tage will not adjust
Front panel CV Led is On.
Check if output voltage is
adjusted above OVP setting
or below UVL setting.
Set OVP or UVL so they will
not limit the output.
5.3
5.4
Output Current will not adjust.
Front panel CV LED is on.
Is the unit in c
onstant voltage
mode?
Check Output Current and
voltage setting
5.2
Large ripple present in output.
Is the power supply in
remote sense?
Is the voltage drop on the
load wire high?
Check load and sense
wires connection for noise
and impedance effects.
Minim
ize the drop on the
load wires.
3.9.4
3.9.8
No output. Display indicates
“OUP”
Overvoltage Protection
circuit is tripped.
Turn off the AC power
switch. Check load
connections. If Analog
Programming is used,
check if the OVP is set
lower than the output.
5
.3
No output. Front panel
ALARM LED is blinking.
Check rear panel J1
ENABLE connection.
5.8
Display indicates “ENA”
Setup switch SW1 setting.
4.4
Display indicates “SO”
Check rear panel J1 Output
Shut
-
Off connection.
5.7
Display indicates “OTP”
Che
ck if air intake or
exhaust are blocked.
Check if the unit is
installed adjacent to heat
generating equipment.
Display indicates “Fb”
Check Foldback setting and
load current.
5.5
Poor Load regulation.
Front panel CV LED is on.
Are sensing w
ires connected
properly?
Connect the sense wires
according to User’s Manual
instructions.
3.9.8
The front panel controls are
non
-
functional.
Is the power supply in
Local
-
Lockout mode?
Turn Off the AC power
and wait until the display
turns off. Turn on
the AC
power and press front
panel REM/LOC button.
7.2.5
9.7 FUSE RATING
There are no user replaceable fuses in the power supply. Internal fuses are sized for fault protection
and if a fuse was opened, it would indicate that service is required. Fuse re
placement should be made
by qualified technical personnel. Refer to Table 9
-
2 for a listing of the fuses.
Table 9
-
2: Internal fuses
Fuse designation
1500W model
750W model
F301
F302, F304
F31, F32
30A 250VAC, TIME DELAY
2A 400VDC, NORMAL
20A 250VAC, FAST
20A 250VAC, FAST
2A 400VDC, NORMAL
NOT USED