TROUBLESHOOTING
TROUBLESHOOTING FLOWCHARTS
5 - 2 I-E96-506B1
®
status. Figure 5-2 shows a troubleshooting flowchart for an
IEPEP03 system.
Another way to detect bad power system status is to hard wire
alarms to the customer alarm outputs. These outputs turn off
to indicate a low bus voltage and other power system problems.
If bad status is detected:
1. Check the LEDs on the AC transfer and bus monitor mod-
ules.
2. If the AC transfer module status LED is red, the module
has failed and must be replaced. Note that a defective AC
transfer module may cause the bus monitor module to show
bad status.
NOTE:
Before removing the ATM module, measure AC input line 1
to verify that it is operational and within tolerance (+102 to
+132 VAC for 120 VAC input; +204 to +264 VAC for 240 VAC input).
3. If the bus monitor module status LED is red, the module
has failed and must be replaced.
NOTE:
Refer to Section 7 for details on module removal and
replacement.
Figure 5-1. Troubleshooting Flowchart, IEPEP01 and IEPEP02
Power Entry Panels
START
DONE
SYSTEM
AND I/O POWER
GOOD?
POWER
MODULE STATUS
GOOD?
REPLACE POWER
SUPPLY MODULE.
REFER TO REPAIR/
REPLACEMENT
PROCEDURES.
YES
YES
YES
NO
NO
NO
PFI SIGNAL
LOW LEVEL?
REPLACE PEP.
REFER TO
REPAIR/REPLACEMENT
PROCEDURES.
TP55170B
ADD POWER SUPPLY
MODULES. REFER TO
INSTALLATION.
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