MONITORING FEATURES
External Status Indicators (Standard) — These indicators provide a summary of the status of the surge SPD module. For normal conditions, the green “OK” LED is illuminated and the red “Service” LED is extinguished. If the surge SPD module requires replacement, the green “OK” LED is turned off and the red “Service” LED illuminated.
Audible Alarm (Standard) — If the surge SPD module requires replacement, an audible alarm is activated to draw attention to the fact that repair service is required to restore the system to normal operation. An audible alarm disable is provided to silence the alarm. The system will automatically reset itself after repair. The audible alarm switch and “Service” LED can be tested by activating the “Test” switch on the system monitor panel.
Summary Alarm Contact (Standard) — Two sets of summary alarm Form C relay contacts (2 N.O. and 2 N.C.) are provided for remote indication of the failed surge SPD module. Contacts are rated 5 amps at 250 VAC maximum with a power factor of
1.0.Access to the contacts is provided via contact terminals located on the printed circuit board mounted on the inside of the unit’s cover.
Surge Counter (Optional) – The surge counter is provided for transient voltage surge monitoring. The counter totalizes line surges monitored since the last time the counter was reset. The circuit counts all surges that deviate from the line sine wave. The factory setting is 30% over nominal line voltage. Other settings include 50%, 70%, and 100%.
TROUBLESHOOTING/ SERVICING/
MAINTENANCE
Troubleshooting
If status failure indication occurs or summary alarm contacts has changed states, a qualified electrician shall first determine if the systems voltage and proper phasing exists.
If the SPD remains in an alarm condition once the electrician 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 – (refers to the model and serial numbers detailed on the data label and is located on the front of the enclosure.)
Surge Protective Devices
•Nature of problem – (including status of all status indicators and alarms).
Servicing
The Liebert SH Series comes with a ten year parts and five year labor warranty (see Warranty Information). For servicing assistance, contact your local Liebert Sales Representative or Emerson Network Power, Surge Protection at
or
ONLY QUALIFIED PERSONNEL SHOULD PERFORM MAINTENANCE ON THE SYSTEM.
HAZARDOUS VOLTAGES ARE PRESENT INSIDE THE UNIT DURING NORMAL OPERATIONS.
ELECTRICAL SAFETY
TO PREVENT RISK OF ELECTRICAL SHOCK, TURN OFF AND LOCK OUT ALL POWER SOURCES TO THE UNIT BEFORE SERVICING UNIT.
Corrective Maintenance - The Liebert SPD is designed for years of
Preventative 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 preventative maintenance since conditions vary from site to site. Inspections for failed surge modules using available diagnostics should be done routinely (weekly or monthly).
Installation, Operation and Maintenance Manual | 8 | Liebert SPDs |
