Emerson 240V Manuel D’Utilisation

Assert manual 

bypass

A user-initiated transfer to bypass will 

assert this alarm, instructing the user to 

enable the manual bypass switch. Once 

the manual bypass is asserted, the alarm 

will clear. This is a non-mutable alarm.

Engage the manual bypass switch (located at the bottom 

front on the left hand corner of the unit). Once engaged, 

the switch may be de-asserted to return to normal 

operation.

Remote shutdown 

on COM port 1 

active

The most likely cause is that the incorrect 

cable has been connected to the COM 

port between the UPS and the host.

Check for a wiring problem to the Shutdown On Battery at 

the COM1 connector. If this problem is not addressed, the 

unit will shut down shortly after switching to battery 

operation.

Battery Test 

Weak Battery

The battery was determined to be weak 

as a result of the battery test.

Depending on the age of the batteries, it may be 

appropriate to replace all batteries in the system. 

Schedule a battery test so that the system operation is 

double-checked once the batteries become fully charged.

Battery Test 

Failure

One or more of the following was 

detected during a battery test: 

• UPS output regulation failure was 

detected.

• A battery module warning or failure 

occurred.

• A system control failure occurred.

Replace the battery modules that have active failures/

warnings. Depending on the age of the batteries, it may be 

appropriate to replace all batteries in the system. 

Schedule a battery test so that the system operation is 

double-checked once the batteries become fully charged.

Battery Cabinet 

Not Connected

This is intended to detect a situation 

where a Modular battery cabinet has 

been connected for communication, but 

the power busses are not connected.

Check that the Modular Battery breaker is closed. Verify 

proper connections between UPS and Modular Battery 

Cabinet.

Don’t Remove SC

The only good System Control Module 

lock lever was raised with the output on 

and the unit is not on bypass.

• Lower the lock lever on the System Control Module.

• Provide qualified bypass power so that transfer to 

bypass is possible.

• Add a redundant System Control Module so that the load 

is not dropped.

Failure: Select 

Manual Bypass

The System Controller detected a failure. 

Select manual bypass so that the unit can 

be serviced.

Transfer UPS to manual bypass and contact Liebert 

Global Services.

Output Off - 

bypass unavailable

This event informs the user that bypass 

was not qualified so the unit dropped the 

load to protect itself.

Verify that the UPS’s bypass source is qualified (amplitude 

and frequency). Verify that the configuration voltage and 

frequency settings are properly selected.

Last UPS Shutdown 

By Emergency 

Power Off

REPO switch was pressed.

If REPO wasn’t pressed, check for REPO wiring problems.

External Battery 

Module Warning

The energy delivered from the Non-

Modular battery did not meet 

programmed battery capacity.

Verify proper connections between UPS and Non-Modular 

Battery Cabinet. Reenter the amp-hour rating for the 

external battery (set the amp-hour entry to zero and press 

the return key, then reset it to the appropriate value for the 

external battery). If the problem persists, the external 

battery should be replaced.

Battery Module 

Not Ready

A battery module is not ready. In most 

cases, one or more battery modules 

should indicate a warning/failure 

condition.

Ensure that the battery module is fully seated and the 1/4 

turn fastener is engaged. If the problem persists, replace 

the battery module with warning/failure condition indicated 

at the User Interface. If no User Interface warning/failure 

of battery module, look for the battery module with LEDs 

indicating a problem and replace that unit.

Power Module 

Not Ready

A power module is not ready. In most 

cases, one or more power modules 

should indicate a warning or failure 

condition.

Ensure that the power module is fully seated and the 1/4 

turn fastener is engaged. If the problem persists, replace 

the power module with warning/failure condition indicated 

at the User Interface. If no User Interface warning/failure 

of power module, look for the power module with LEDs 

indicating a problem and replace that unit.