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10 Troubleshooting, Service & Maintenance
5.0 T
ROUBLESHOOTING
, S
ERVICE
& M
AINTENANCE
5.1 Troubleshooting
If status failure indication occurs or Form C relay has changed states, a qualified electrician
should first determine if the systems voltage and proper phasing exists.
If the Interceptor II TVSS remains in an alarm condition once the technician is satisfied that the
electrical system and its connections are normal, the unit should be repaired. At this point consult
the factory, having available the following information:
• Unit identification number—the model and serial numbers detailed on the data label on the
upper left (hinge) side of the enclosure
• Nature of problem—including status of all status indicators and alarms.
5.2 Service
5.3 Corrective Maintenance
The Liebert Interceptor II TVSS is designed for years of trouble-free operation. However, even the
most reliable equipment may fail under abnormal conditions.
Diagnostic indicators are provided to indicate when the unit needs replacement (see 4.0 - Opera-
tion for details). To ensure continuity of surge protection, failed units should be replaced at the
earliest convenient service opportunity. On systems rated greater than 100 kAmp surge capacity
and larger, parallel modules provide redundant transient surge protection such that any single
module failure does not completely eliminate the TVSS protection.
When replacing surge modules, other components should be inspected for damage and replaced if
necessary. Standard electrical troubleshooting procedures should be used to isolate problems
other than failed surge current diverter modules.
When replacing components, for continued proper operation and safety, replace only with identi-
cally rated components. Please contact factory for information on replacement parts.
5.4 Preventive Maintenance—Inspection and Cleaning
Periodic system inspections, cleaning, and connection checks are recommended to ensure reliable
system performance and continued surge transient protection.
It is difficult to establish a schedule for preventive maintenance since conditions vary from site to
site. Inspections for failed surge current diverter modules using available diagnostics should be
done routinely (weekly or monthly).
!
WARNING
ONLY QUALIFIED PERSONNEL SHOULD PERFORM
MAINTENANCE ON THE SYSTEM.
HAZARDOUS VOLTAGES ARE PRESENT INSIDE THE UNIT
DURING NORMAL OPERATIONS.
ELECTRICAL SAFETY PRE-CAUTIONS MUST BE FOLLOWED
WHEN SERVICING THIS UNIT.
TO PREVENT RISK OF ELECTRICAL SHOCK, TURN OFF AND
LOCK OUT ALL POWER SOURCES TO THE UNIT BEFORE
SERVICING UNIT.
FOR SERVICING ASSISTANCE, CONTACT YOUR LOCAL
LIEBERT SALES REPRESENTATIVE OR LIEBERT AT
800-288-6169 OR 607-724-2484.