Xtreme Power Conversion P91 - 7 Troubleshooting; 7.1 LCD Panel Display Pattern Definition

Xtreme Power Conversion Corporaon
P91, TX91, TX91L, TXVR Service Manual
Page 18
Uninterrupble Power Supply
7. Troubleshoong
This secon describes how to nd the troubles when UPS is abnormal. We suggest you to follow the service
procedure below:
1. Check the UPS status via LED and LCD display, the sound of the buzzer, or listen to the descripon of end
users.
2. Inspect failure board for stac checking.
3. Replace failure components.
4. Stac checking.
5. Power-on checking.
6. Test aer repair.
Following secon will help service person to solve most problems.
7.1 LCD Panel Display Paern Denion
7.1.1 Trouble shoong for warning icon in LCD display
Any warning display implies some abnormity happened to the UPS, indicang that some situaon that may
endanger the reliability of the UPS has occurred, but these situaons don’t immediately lead to interrupon of
power supply.
LCD icon (Flashing) Alarm Possible cause Acon
1 Beeping / second Low baery Check the baery voltage
2 Beeping / second Over load Check the loads
1 Beeping / second Baery disconnected Check the baery wiring
1 Beeping / second Baery/Charger voltage
too high
Check the output voltage of the bat-
tery and the charger
1 Beeping / second EPO plug or cable not
connected
Check the EPO plug and EPO cable
1 Beeping / second Fan failure, or high
internal temperature
Check the fans, loads, venlaon,
ambient temperature
1 Beeping / second Charger broken or
low output voltage
Check the charger
1 Beeping / second I/P fuse broken Check the I/P fuse
1 Beeping / second Overload 3 mes in
30min
Check the loads
Note: When the UPS alarms, the UPS is sll working on the original mode.