Surge
Suppression
Systems
Installation, Operation
ACV Series
and Maintenance Manual
- 7 -
Rev 2, 3/00
®
OPERATION
Liebert AccuVar ACV Series SPD Systems
require little or no operator intervention after
installation. The units are provided with status
LED, which assist in determining when the unit
needs service (see Troubleshooting/Repair/
Maintenance Section).
If the unit is energized and the green LED is off
(and / or the red LED is on), the AccuVar is not
fully functional and will require replacement.
Summary Alarm Contact Option
Optional Form C ( 1 N.O. and 1 N.C.) relay
contacts may be provided for remote indication of
phase loss, undervoltage (70% of line voltage,
typical), power loss, and suppression failure. If the
status of the contacts change (indicating a
problem), one of these conditions exists.
The summary alarm contact terminals are located
inside the unit. Contacts are rated for 5 amps at
125 VAC maximum.
Note: Wiring for the Form C contacts may be
routed through the flexible conduit with the phase
wiring. All wire must comply with the National
Electrical Code (NEC) and applicable local codes.
TROUBLESHOOTING / MAINTENANCE / SERVICING
Inspection and Cleaning
Periodic system inspections, cleaning, and
connection checks are recommended to ensure
reliable system performance and continued
transient protection.
(For any other problems not listed below, or if
cause of the problem cannot be determined,
please call Control Concepts at 800-288-6169 or
607-724-2484.)
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 AccuVar SPD remains in an alarm condition
once the technician is satisfied that the electrical
system and its connections are normal, the unit
should be replaced.
Corrective Maintenance
The Liebert AccuVar ACV Series SPD 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 operation section of this manual
for details). To ensure continuity of surge
protection, failed units should be replaced at the
earliest convenient service opportunity.
Servicing
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.
WARNING
!!
