Operating instructions

6.8 Main Circuit Module Removal and Installation

The XM Series power module comes with a field-replaceable, main circuit module

assembly containing the standard control logic. It is designed to accept APM (Automatic

Performance Monitor) and USM (Universal Status Monitor) plug-in logic upgrades to

facilitate self-testing and status monitoring. The removable module is located on the left

side of the unit.

CAUTION: ALWAYS SWITCH THE BATTERY BREAKER OFF PRIOR TO REMOVING OR

INSPECTING THE MAIN CIRCUIT MODULE ASSEMBLY.

DO NOT REMOVE THE MODULE ASSEMBLY DURING INVERTER OPERATION.

HANDLE THE CARD ASSEMBLY WITH EXTREME CARE. CIRCUIT BOARDS AND LOGIC

UPGRADES ARE STATIC-SENSITIVE AND SUSCEPTIBLE TO DAMAGE. HANDLE THE

CARD ASSEMBLY WITH EXTREME CARE. CIRCUIT BOARDS AND LOGIC UPGRADES

ARE STATIC-SENSITIVE AND SUSCEPTIBLE TO DAMAGE.

WHEN RE-INSTALLING THE MODULE, MAKE SURE THE CARD EDGE CONNECTOR IS

FIRMLY SEATED IN THE BACK PLANE ASSEMBLY.

Procedure:

1. To remove the main module assembly, grasp the handle on the left side of the unit.

Pull firmly to release the module from the back plane assembly. Gently slide the

module assembly straight out. It is designed so that the board can be removed while

the power supply is operating on AC line power.

2. Verify that the correct battery charge voltages are selected (section 6.9). If an APM

or USM logic upgrade is included, "Auto-Equalize" and "Auto-Test" switches must be

set (section 6.10).

3. To reseat the main circuit module assembly, align it with the card guides and gently

slide it back into the back plane assembly. Press the assembly firmly to seat it into

the card edge connector.

6. INSTALLATION

Main Circuit Module

Module Assembly

(pulls straight out)

NOTE: THE MODULE ASSEMBLY CAN BE REMOVED WHILE THE POWER SUPPLY IS

RUNNING ON LINE POWER. IT WILL CONTINUE TO OPERATE AS A NON-STANDBY

POWER SUPPLY.