Xtreme Power Conversion Corporation
P91, TX91, TX91L, TXVR Service Manual
Page 23
Uninterruptible Power Supply
7.1.3 Troubleshooting
Problem
Possible cause
Action
Battery backup time is short Battery not yet been fully
charged.
Keep UPS connected to utility power continuously
for more than 10 hours to recharge the batteries.
UPS overload.
Check the loads and remove some non-critical
loads.
Battery aged
Replace the batteries
Charger fails
Replace the charger
The UPS cannot power on
after pressing the button
The button is not pressed
and held long enough
Press and hold the button continuously for more
than 0.5s
Battery is not connected
or battery voltage is too
low, or charger fails.
Check the charger and battery.
UPS failure.
Repair the UPS.
7.2 Repair
In this section, some debug skills are listed to help you find the failed components and problems as soon as pos-
sible. Before taking the following steps, we strongly suggest reading previous section for trouble shooting first.
Then check the components listed in section 7.2.4 to find out which block fails
7.2.1 Basic Instruments and tools
1. One computer with RS232 port and one standard RS232 cable;
2. Wire cutters and clamps;
3. One electric soldering iron;
4. One multimeter;
5. One oscilloscope(voltage and current probe needed);
6. Diagonal pliers, snipe nose pliers, cross screwdrivers (150mm/75mm length), flat screwdrivers
(75mm length) and PVC insulating tapes etc;
7. Make-self tools including Balance voltage test equipments, current limiting resistors, tubes and clamp ter-
minals with different specifications;
7.2.2 Configuration of the Model Port on the Control Board
The Model Port (JP1) on the CNTL board should be configured as follows:
Table 7.1 Model Port Setting List
Model Type
pin1&pin2
pin3&pin4
Battery
Number
pin5&pin6
pin7&pin8
pin9&pin10
6K
0
1
16
1
0
0
6KL
0
0
17
0
1
1
10K
1
1
18
0
1
0
10KL
1
0
19
0
0
1
20
0
0
0
Note: “1” indicates that the jumper is connected;
“0”indicates that nothing is connected
