Vertiv Liebert APM2 - Service Procedures of Power Module; Replacement Procedures of Bypass Power Module

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11.2.1 Service procedures of power module

1. Place the ready switch on the front panel of the power module to unready state, the green indicator beside the

ready switch should be off and the red indicator is on.

2. Ensure that the red indicator on the power module is on.

3. Remove the fixing screws on both sides of the front panel of the module, and pull the bypass module out of the

cabinet.

NOTE: If the module needs to be disassembled on site under the condition of mains power or battery power supply,

the maintenance personnel (users contact customer service) need to turn the ready switch on the front panel of the

power module to the not ready state, and the green light of the module status indicator is off. , the red light is on, and

click on the ParamSet to enter the cold offline command, wait for 5 seconds to discharge before pulling out.

NOTE: When entering the cold offline command, the UPS may not be able to enter the battery power supply mode,

operate with caution; at the same time, in the battery power supply mode, cold offline operation is prohibited.

NOTE: When the module is pulled out halfway, it will be blocked by the leaf spring on the right side of the module. The

leaf spring must be pressed down to pull out the module.

4. After servicing the module, check that the ready switch is in unready state.

5. Put the module into the cabinet and tighten the screws on both sides.

NOTE: Install another serviced module inside the cabinet after 10 seconds.

6. Place the ready switch of the module to the left position, and the module will get connected to the system

automatically.

11.2.2 Replacement procedures of bypass power module

Service procedures in bypass mode:

1. Make sure to enable Normal mode or Maintenance bypass mode, refer to Procedures for Transfer Between

Operation Modes on page112 or UPS Battery on page130.

2. Place the ready switch on the front panel of the power module to unready state, the this will turn the red indicator

beside the ready switch ON.

3. Remove the fixing screws on both sides of the front panel of the bypass power module, and pull the module out

of the cabinet, to service the module.

4. After servicing the module, put the module back into the cabinet, and tighten the screws on both sides.

NOTE: When pulling the bypass power module out of the cabinet, move it around and pull outward many times.

NOTE: Loose contact of the bypass module can affect the normal operation of the bypass power module and the

overall unit.

NOTE: When putting the bypass power module back in the cabinet, push it to ensure it connects correctly with the

system. The brackets on both sides of the module are close to the cabinet column.

5. Place the ready switch to ready state. This will turn the red indicator beside the ready switch OFF and the green

indicator ON.

6. Ensure to enable to the Bypass mode, refer to Procedures for Transfer Between Operation Modes on page112 or

UPS Battery on page130.

Vertiv™ Liebert® APM2 30 to 120 kVA Modular UPS User Manual

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