Xtreme Power Conversion Corporation
M90S Service Manual
Page 21
Uninterruptible Power Supply
7. Trouble Shooting
7.1 Warning status
When Fault LED flashes and the buzzer beeps once every second, it means that there are some
problems with UPS. Users can see the warning code from LCD panel and refer to the trouble shooting
table to check what problem have probably happened.
7.2 Fault mode
1) When Fault LED illuminates and the buzzer beeps continuously, it means that there is a fatal error
about UPS. Users can get the fault code from LCD panel. Please refer to the trouble shooting table
to check what problems probably happen .
2) Don’t try to turn on the UPS again before the problem is clear. If the problems can’t be fixed,
please contact the distributor or service people immediately.
3) For emergency case, please cut off the connection from utility, external battery, and output
immediately to avoid more risk or danger.
