Xtreme Power Conversion Corporation
E90 Service Manual
Page 44
Uninterruptible Power Supply
Replace INV power board
1. Ensure the safe conditions before any operation. Please read chapter 2 “Security conditions” and chapter 3
“shutdown-disassembly/reassembly UPS” carefully.
2. Operate according to the steps 1-3 of process A or steps 1-3 of process B in chapter 3;
3. Remove the screws of left panel of UPS, remove the cover, use the bleeder resistor to release the energy
stored in the Bus capacitor;
4. Remove all the cables of the INV-POWER board
5. Remove all the screws of the INV power board;
6. Replace the PCB, package the old PCB;
7. Install the screws and cables;
8. install the right panel and screws;
9. Continue with the steps 4-9 in process A or 4-8 in process B in chapter 3;
LCD on front panel
1. Ensure the safe conditions before any operation. Please read chapter 2 “Security conditions” and chapter 3
“shutdown-disassembly/reassembly UPS” carefully.
2. Operate according to the steps 1-3 of process A or steps 1-3 of process B in chapter 3;
3. Open the front panel, remove 4pcs of nuts of the rear panel and then remove the rear panel;
4. Remove all the cables of the PCB
5. Remove all the screws of the PCB;
6. Replace the PCB, package the old PCB;
7. Install the screws and cables;
8. Install the rear panel and nuts;
9. Continue with the steps 4-9 in process A or 4-8 in process B in chapter 3;
Replace fan
(2 fans are provided)
1. Ensure the safe conditions before any operation. Please read chapter 2 “Security conditions” and chapter 3
“shutdown-disassembly/reassembly UPS” carefully.
2. Operate according to the steps 1-3 of process A or steps 1-3 of process B in chapter 3;
3. Remove the screws of right and left panels, remove the cover, use the bleeder resistor to release the energy
stored in the Bus capacitor;
4. Remove the fan cables of the INV power board;
5. Remove all the screws of the fan;
6. Replace with a new fan;
7. Install the screws and cables;
8. Install right and left panels, and the screws;
9. Continue with the steps 4-9 in process A or 4-8 in process B in chapter 3;