MGE UPS Systems EX-7 - Manual (Page 57)

Maintenance
4.0 Scope
Maintenance includes a troubleshooting guide of symptoms and possible solutions, hot swapping the Power Module
and Battery Module, and testing scenarios.
4.1 Troubleshooting
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If any of LEDs or is on, there is an operating anomaly or an alarm.
◗
Use "scroll up" or "scroll down" function button to reset the audible alarm.
Table 4-1: Troubleshooting not requiring MGE after-sales support.
Symptoms Indication Correction
LED is on, and Bypass AC AC source is not connected Rewire correctly to the Normal AC
source is present to the correct terminals. source.
the LCD display shows
BAD CONNECTION
REWIRE AC NORMAL
LED is on, Load supplied by Bypass AC source. Push the ON button for more than 3
the LCD display shows: seconds.
LOAD LEVEL
XX kW / XX KVA
LED is on, and Bypass AC UPS overload Check if any device is shorted or
source is present failed.
the LCD display shows:
THERMAL OVERLOAD
1XX%
LED is on, the LCD Short circuit conditions on output Check if any load has shorted or
display shows: devices. failed.
CURRENT OVERLOAD
LED is on, 180° degree phase shift between Check if Bypass source is correctly
but the LCD display shows: bypass and normal AC source. wired
BYPASS REVERSE (in case of upstream transformer use).
REWIRE BYPASS
Audible alarm is on, Input/Output box not Check if the Input/Output box
the LCD display shows: installed correctly. is correctly installed. See section 2.7.
I/O BOX REMOVED Check for correct I/O Box.
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18
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17
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