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POWER AND COOLING UNIT MANUAL EXTRACT
POWER/COOLING TROUBLESHOOTING GUIDE - CONT'D.
4.3.1
REMARKS/NOTES (CONT'D.)
Before replacing any power regulator for a fault condition.
Proceed as follows:
1.
Turn overcurrent adjust potentiometer one or two turns
CW and try to turn power on.
2.
Turn output voltage adjust potentiometer
one
or two
turns CCW and try to turn power on.
3.
If either of the -above corrects the fault, adjust
regulator for proper operation.
I
...
•
I
I
YES
SEE NOTES
Replace power regulator
with FAULT indicator lit
FROM PRECEDING
PAGE.
•
Check each power regulator output
e
Replace power regulator with no output
if only one regulator is bad (SEE NOTES)
•
Replace PCM if more than one regulator
has no output
FROM PRECEDING
PAGE
FROM PRECEDING
PAGE.
•
Check for secure
cabling of
capacitor module
VJl to high
voltage bus.
•
Check for blown
capacitor module
fuse.
•
Replace capacitor
module.
•
Check and adjust all power
regulators to installation
specifications
HONEYWELL CONFIDENTIAL AND PROPRIETARY
Figure 4-13
Sheet 5
42
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