April 200376-100016-002
PEGAsysâ„¢ LV
5-1
CHAPTER 5
TROUBLESHOOTING AND CORRECTIVE MAINTENANCE
5-1 INTRODUCTION
The effectiveness of this chapter is greatly increased by
first reading the entire manual. The service technician must
have a sure understanding of the purpose and correct func-
tion of the module/device before attempting corrective
maintenance. This chapter contains instructions to aid a
technician in locating faulty modules/devices.
This chapter also provides instructions for the removal and
replacement of the replaceable modules/devices of the
PEGAsys LV system.
WARNING
!
All service to panel must be done with panel
powered down to prevent damage to panel
components, personnel injury, or both.
5-2 STANDARD FAULT-ISOLATION
TECHNIQUES
Failure of the PEGAsys LV system to function properly will
usually be caused by one or more of the following faults:
• Failure of the power supply
• Damaged or faulty wiring
• Component failure
When a failure occurs and the cause is not known, check
as many of these items as is practical before starting a
detailed check. If possible, obtain information about any
changes taking place that may affect the system.
5-2.1 Visual Inspection
When troubleshooting, the fault may often be discovered
through visual inspection alone. Some faults, such as
burned out indicators, shorted transformers or wiring, can
be located by sight or smell. Check for smoke or the odor
of burned or overheated parts. Look for loose connections.
Visual inspection is also useful in avoiding damage to the
system which could occur through improper servicing meth-
ods. Refer to Table 5-1, Troubleshooting Index, and the
paragraphs of this chapter for troubleshooting beyond vi-
sual inspection.
5-2.2 Power Checks
Many faults on the system can be caused by problems
with power. Ensure battery and line voltages are checked
prior to troubleshooting the system.
5-3 TROUBLESHOOTING
The PEGAsys LV system utilizes internal programming for
continuous system testing. Most system faults can be iso-
lated through the operation of the front panel. Users/tech-
nicians can initiate various testing via the use of the system
menu (refer to Paragraph 2-5) after entering a valid pass-
word.
Table 5-1. Troubleshooting Index
eciveD/eludoM
deliateD
noitartsullI
lanoitcnuF
noitpircseD
hpargaraP
nemecalpeR
erudecorP
lortnoClartneC
eludoM
2-31.3-32.4-5
rettimsnarT/revieceR
eludoM
3-32.3-33.4-5
ylppuSrewoP
eludoM
4-33.3-3--
eciveDdleiF--7.3-34.4-5
elbasserddA
eciveDtupnItcatnoC
9-311.3-311-7
yaleRelbasseddA
eciveDtuptuO
01-321.3-321-7
gnisuoHtcuDriA11-331.3-3launaMeeS
srotalosIpooL
21-3
urht
41-3
41.3-3--
htiwesurofMLAP
DSSHTXNOIRO
51-351.3-3launaMeeS
elbasserddA
eludoMeniLmralA
61-361.3-3launaMeeS
elbasserddA
rednuoS/langiS
eludoM
71-371.3-3launaMeeS
5-4 REMOVAL AND REPLACEMENT
The following paragraphs provide required tools and step-
by-step replacement procedures for the PEGAsys LV. The
procedures should also be used to assist module and de-
vice installation.
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