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SECTION 12 |
POWER ON/OFF SWITCH DOES NOT LIGHT WHEN SWITCHED ON
-
Check that power is available in the AC outlet.
- Check that the power cord plug is properly plugged in.
BREAKER TRIPS
The breaker has tripped due to abnormal condition. Call technical support.
"FAN FAILURE" LED LIGHTS UP AND BUZZER IS SOUNDED
- One or both of the fans have stopped.
- Forced cooling has failed due to defect in the cooling fan(s)
- Switch OFF the unit immediately. Fan(s) needs to be replaced. DO NOT USE THE UNIT TILL THE
DEFECT IS RECTIFIED. IT IS PROHIBITED TO USE THE UNIT WITHOUT FORCED COOLING. CALL
TECHNICAL SUPPORT.
- If both the fans are running, the small fan status monitoring PCB may be defective.
Call technical support.
" PSM STATUS " LED(S) DOES NOT LIGHT UP
The associated module has become defective. The unit will still operate normally as the remain-
ing working modules will share a higher load. The unit will go into current limit and the output
voltage will drop if the load drawn is more than the combined maximum rated output of the
remaining modules. Reduce the load so that the maximum load drawn is less than the combined
maximum rated output of the working modules.
Remove the defective module and replace with a new module.
OUTPUT VOLTAGE DROPS ON LOAD
The unit has gone into current limit as the load being drawn is more than the combined maximum
rating of the working modules. This may also result if one or more modules has failed . Check that
all the modules are operating properly. If a module has failed, its green LED would extinguish or
flash. Reduce the load drawn to a value less than the combined maximum rated output of the
working modules. If the voltage does not rise to the rated voltage of 27.5V to 27.4V, then switch
OFF all the loads. If the voltage in this condition is also low, switch off the unit and contact techni-
cal support.
ONE OR MORE "PSM STATUS" LED(S) FLASHES
- The output voltage of the individual modules is not the same or the forced shared control
circuitry of the module(s) is defective. Adjust the voltages of the modules to 28V.
- If the problem still exists, contact technical support.
- If the one or more PSM status LED(s) flash when no external load is connected, it may mean that
the internal pre-load current is not sufficient to provide adequate feedback signal for the cur-
rent share control circuitry. Apply external load. If the flashing stops, the associated PSM(s) are
normal. If flashing continues even after applying an external load, contact technical support.
Troubleshooting
SAMLEX AMERICA INC. | 17
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