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Maintenance
4.6Reporting a Problem
If a problem occurs within the UPS, review all alarm messages along with other pertinent data. This information should be given by telephone to the Liebert service representative’s office nearest you. This information can be downloaded to Liebert Global Services by using the optional modem. Contact Liebert Global Services at
4.7Corrective Actions
For each alarm message on the Operator Control Panel and the Remote Monitor Panel, you can find the recommended corrective action in Table 4.
4.8Recommended Test Equipment
A list of recommended test equipment and tools required to maintain, troubleshoot and repair the UPS module is given in Table 11. You may substitute instruments of equivalent range and accuracy. All instruments should be calibrated and be within the current calibration cycle. Calibration data for the instruments should be maintained in
Table 11 Recommended test equipment and tools
Qty | Test Equipment | Manufacturer | Model or Type |
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1 | Oscilloscope | Tektronix, | DC to 50 MHz |
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2 | Voltage Probes | Tektronix, | 10X, with 10 ft cable |
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2 | Voltage Probes | Tektronix, | 100X, with 10 ft cable |
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1 | Digital | Fluke | 87, with test leads |
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1 | Tool Kit | N/A | Standard electrical contractor tools |
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4.9Upstream Feeder Circuit Breaker Setting Inspections
During normal UPS operations,
Liebert strongly recommends periodic inspections of the bypass feeder breaker instantaneous trip set- tings, as well as the module input (rectifier) feeder breaker trip settings, to ensure that they are cor- rect. For a variety of reasons, although typically during circuit breaker maintenance procedures by others, trip settings have been known to be inadvertently left improperly set. Correct trip setting of these circuit breakers is most important to achieving
For further information regarding proper trip settings for your feeder breakers, call
NOTE
The instantaneous trip setting of the breaker feeding the UPS bypass input should be high enough to accommodate
NOTE
While Liebert can provide typical guidelines, the responsibility for the proper breaker trip settings outside the
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