Xtreme Power Conversion Corporation
M90S Service Manual
Page 28
Uninterruptible Power Supply
Notes:
1. Be sure the ground of the UPS connect earth safely while parameter regulation.
2. The new assembly UPS must be regulated.
3. The UPS who have been replaced CNTL/PSDR must be regulated agaiin.
4. All the commands use capital letters.
5. All the above parameter regulation cannot be accumulated.
6. All the regulation will be saved in the Flash of the CNTL when UP S shutdown with battery connected.
8 Test Step
After replacing all defected components, take the following steps to verify the repair result and the reliability of
the UPS.
1. Install all of boards/cable/connector.
2. Check the wiring.
3. Apply DC Power from power source with current limitation function to the battery terminal.
4. Press the “Battery start” button activating the SPS, the LCD will be lit and the Fan will rotate. If not, please
check the input voltage of the SPS, if the voltage is the DC source output voltage, please repair the SPS again.
5. According to the sequence press the “ON/ENTER”→“UP or DOWN”→“ON/ENTER” button, then
UPS should be DC started, If UPS does not start successfully, please repair the INV, PFC again.
6. If UPS does not start up for several trying or DC source is on current-limit state continuously, there must be
some defected components exists. Please follow trouble-shooting chart to debug again.
7. Turn off the UPS, connect AC power to the UPS, turn on the UPS, if fail you may have start one new round of
trouble shooting.
8. Check and adjust charge voltage.
9. Check the output voltage waveform and DC-offset voltage, at no-load and full load condition.
