Honeywell DPS8 46 LO PROFILE Reference Manual page 36

POWER AND COOLING UNIT MANUAL EXTRACT A ISSUED
4.3 POWER/COOLING TROUBLESHOOTING GUIDE
The Troubleshooting Guide flowchart on this page can be used as an aid in locating
a
problem that is suspected of being in the power or cooling system. See Figure 4-13 Sheet 3
for power control module (PCM) controls and indicators.
REMARKS/NOTES
WARNING
HIGH CURRENT AND HIGH VOLTAGE SHOCK
HAZARDS ARE PRESENT IN THE POWER SYSTEM.
1.
NEVER CONNECT OR DISCONNECT POWER
CABLES OR WIRING WHILE POWER IS ON.
2.
WAIT AT LEAST FIVE MINUTES AFTER
POWER IS OFF FOR THE CAPACITOR RIDE-
THRU MODULE TO DISCHARGE BEFORE
WORKING ON THE POWER SYSTEM.
3.
OBSERVE AND OBEY ALL CAUTION AND
WARNING SIGNS AND LABELS.
SUSPECTED POWER/COOLING SYSTEM PROBLEM
PRESS
ALARM
RESET'ON"°
OPE~ PANEL
GO TO POINT A,
FIGURE 4-13 SHEET 4.
•
Check PEM.
FA.i.~S
circuit breaker.
Check air filters.
FALSE ALARM
Check that fans are
running up
speed.
•
•
•
Check for secure
cables at PCM and
operator panel.
YES
Change PCM
Change operator
panel PWB.
HONEYWELL CONFIDENTIAL ANO PROPRIETARY
Figure
4-13
Sheet 2
39
GO TO
NEXT PAGE
to
•
Check ho.ses and
wire connections at:
air pressure sensors.
•
Check for secure
cables at PCM.
•
False alarm .
Change PCM.
•
check for secure
cables at: PC}-f.
•
Change PCM .
• Unit has cooled off.
Try again.
• Could be failed PC~
or temperature sensor.
The O.T. ALARM is
expected at this point.
REV. l