Chapter Iv - Maintenance And Troubleshooting; Scope; Troubleshooting - MGE UPS Systems Comet EXtreme Series Installation And User Manual

4.0

Scope

This section describes maintenance of the Comet Extreme 4.5/6/9/12 kVA UPS.
4.1

Troubleshooting

If any of LEDs "11 , 12 , 13 or 14" flash, there is an operating abnormality or an alarm.
If a LED flashes, the bar graph data is no longer displayed.
Table 4-1: Troubleshooting not requiring MGE after-sales support.
Indication
AC & DC power are present. UPS fault due to incorrect start up procedure,
On/Off switch is pressed on. incorrect cable connections, or incorrect
All UPS front panel LEDs
are off.
No output power.
LED "11" flashes and the
buzzer beeps.
LED "14" flashes.
LED "17" is ON.
Table 4-2: Troubleshooting requiring MGE after-sales support.
Indication
LED "12" flashes and the
buzzer beeps.
LED "13" flashes.
M a i n t e n a n c e a n d Tr o u b l e s h o o t i n g
Description of Problem
connection of the I/O Box.
UPS overload. Overload is too long or too
high. The UPS cuts the supply of power to
the connected equipment and the buzzer
sounds continuously.
The ambient temperature is higher than 40°C. Install the UPS in a room where the ambient
The UPS is not designed to operate more
than eight hours under these conditions.
The UPS is in maintenance mode (bypass)
Description of Problem
UPS electronics have detected a UPS fault.
Depending on the UPS personalization
parameters (see section 4.6), there are two
possibilities: The equipment connected to
the UPS continues to be supplied, directly
from the AC-power source (via the automatic
bypass, LED "18" ON); The connected
equipment is not powered or protected.
A battery fault was detected during the
battery test.
Maintenance and Troubleshooting
Installation and User Manual
Correction
Push the "Output Power On/Off" switch to turn
the UPS OFF.
Switch OFF all battery breakers.
Remove the I/O Box for at least 2 minutes then
reinstall the I/O Box to the UPS. Turn battery
circuit breakers to ON position. Repeat
start-up procedure (Section 4.3)
Check the power drawn by the equipment and
disconnect any non-priority devices.
temperature is not greater than 40°C.
Turn the manual bypass switch to "NORMAL"
position.
Correction
Follow the UPS replacement procedure
Call the after-sales support department at
1-800-523-0142.
Make sure that the battery circuit
breaker(s) is closed. If that is the case,
call the after-sales support department
because the battery is faulty.
page 4—1