Xtreme Power Conversion E90 Series Service Manual Download

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Xtreme Power Conversion Corporation

E90 Service Manual

Page 42

Uninterruptible Power Supply

E90 standard battery string:

1. Switch of the battery switch (if have) , remove the battery baffle;

2. remove the battery, and use the new battery

3. carefully checked if all the connection is good

4. Re-install the battery drawer;

5. Measure the total voltage of the battery;

6. Install all screws, baffles, switch on the battery switch (if have).

Single Battery cabinet:

1. Close the battery switch(if have) ;

2. Disconnect the connection between the UPS and the battery cabinet;

3. Replace the battery according to the battery cabinet user’s manual;

4. Thoroughly check if all the connections are correct;

5. Measure the total voltage of the battery;

6. Open the battery switch(if have)

PCB replacement

Warning:when UPS works, a large amount of energy is stored in the internal BUS capacitor, it cannot be

guaranteed that there is no electricity inside the UPS with mains isolation, so it needs extra attention when

maintenance. Disconnect all external input power of the fault machine for maintenance. After opening the case,

use the bleed resistor to release the energy stored in BUS capacitor to avoid injury to person.

General instruction

The internal voltage of the UPS is high enough to cause serious personal injury or death.

1. Ensure the safe conditions before any operation. Please read chapter 2 “Security conditions” and chapter 3

“shutdown-disassembly/reassembly UPS” carefully. Be careful when disconnecting the battery. Short circuit will

damage the battery or wiring.

2. ESD(electrostatic discharge) precautions: The PCB is very sensitive to electrostatic. When pick and place the

board, ensure that the operating personnel and equipment are grounded well.

The new board is taken out from the anti-static packaging only when necessary, the old board removed from the

UPS should be immediately placed in anti-static packaging.
3. Shut down the UPS according to the process A or B in chapter 3.
4. When disconnect any connectors, hold the male while pulling the female (sometimes need to press the
connector snaps) , otherwise, it will make the connector or PCB bending.
Mark it before disconnecting in order to facilitate the re-assembly connector.
5. Ensure the compatibility between the new board and old board before replacement.
6. When re-install the connector, the male and female should be aligned, or the PCB or UPS will be damaged.
7. Confirm if the connection is correct after replacing PCB.

Input EMI board replacement

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 EMI board;

5. Remove all the screws of the EMI 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;