Troubleshooting - Emerson Liebert GXT-MT User Manual

Liebert GXTMT Series

1-3 kVA UPS

10. Trouble Shooting

If the UPS system does not operate correctly, please attempt to solve the problem using the table below.

Problem

No indication, no warning

tone even though system is

connected to mains power

supply

LINE LED blinks

LINE-LED blinks and

BATTERY-LED lights up

LINE and BYPASS LED light

up even though the power

supply is available

INVERTER LED lights up,

and audible alarm sounding

every 1 beep in every 4

seconds

FAULT LED lights, warning

tone once a second

FAULT-LED lights up,

permanent warning tone

Emergency supply period

shorter than nominal value

FAULT LED lights,

BATTERY-LED blinks,

warning tone once a second

Please have the following information at hand before calling the After-Sales Service Department:

1. Model number, serial number

2. Date on which the problem occurred

3. Detailed description of the problem

Page ２０

Possible cause

No input voltage

Phase and neutral

conductor at input of UPS

system are reversed

Input power and/or

frequency are out of

tolerance

Inverter not switched on

Mains power supply has

failed

Overload

UPS fault

Batteries not fully charged

/ batteries defect

Charger or Batteries

damaged

V2.11

Installation and User Manual

Trouble Shooting

Remedy

Check building wiring socket outlet

and input cable.

Rotate mains power socket by 180°

or connect UPS system.

Check input power source and inform

dealer if necessary

Press On-Switch "I"

Switching to battery mode

automatically. When audible alarm

sounding every second, battery is

almost empty.

Remove loads of UPS output.

Notify dealer

Charge the batteries for at least

1 - 2 hours and then check capacity.

If the problem still persists, consult

your dealer.

Notify dealer

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