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3. Troubleshooting
When you call for service, please provide the following information:
Date and time of the problem, product model and serial number.
Detailed description of the event and the status of panel indicators at the time
of event.
3.1 LED and diagnostic audio alarms
Status of Anomaly LEDs
and Load LEDs
All LEDs light up
Tripped to Bypass due to output overload; beeps every half a
second
LED A lights up
Tripped to Bypass due to output overload; beeps (1s or 2s)
every 4 seconds
LED B lights up
Tripped to Bypass due to Bus overvoltage; beeps (1s or 2s)
every 4 seconds
LED C lights up
Tripped to Bypass due to failure of control power; beeps (1s or
2s) every 4 seconds
LED D lights up
Tripped to Bypass due to PFC failure; beeps (1s or 2s) every 4
seconds
LED E lights up
Tripped to Bypass due to INV failure; beeps (1s or 2s) every 4
seconds
LEDs A&B light up
INV-to INV communication anomaly; beeps every half a second
LEDs A&C light up
Battery test anomaly; beeps (2s) every 60 seconds.
LEDs A&D light up
L1 & L2 phase failure
LEDs B&C light up
REPO activation
LEDs C&E light up
Command given from interface for UPS shutdown; no alarm
activation
LEDs D&E light up
Charger overvoltage: Beeps (1s) every 4 seconds
Power Mains LED lights
Battery not installed or battery low voltage; constant beeping
up; Battery LED blinks
Bypass LED blinks
Bypass voltage or frequency exceeds range
3.2 Troubleshooting
Problem
Possible cause
UPS does not start
UPS output short circuit
when ON button
or overload
pressed
Diagnoses/ Audio Alarms
Remedy
Make sure the power supply to the UPS is
switched off. Remove all the load devices.
Make sure no load device is connected to the
output socket. Verify that none of the load
devices has an internal failure or short.
10
AC input LED
Frequency of power
blinks
mains exceeds UPS
rating by ±5% range.
Battery LED lights
UPS has no input
up
power
UPS input protecting
fuse broke up or Input
NFB tripped.
Voltage of Power
Mains exceeds input
range of the UPS.
UPS battery
Battery not fully
operation time
charged.
shortens
UPS overload.
Aged battery unable to
reach full charge.
Fault and Bypass
UPS overload or failure
LEDs and all load-
of loaded devices.
level LEDs light up
Fault & Bypass
UPS internal fan
LEDs light up and
failure, or UPS shuts
LED A lights up
down due to excessive
temperature.
When the UPS is
UPS internal failure.
in fault and any of
LEDs A through E
light up
Power Mains LED
Battery cable detached/
lights up and
not connected.
Battery LED blinks
UPS output frequency not synchronized with
Power Mains. Please check UPS input for
normal frequency. May be that the power
source is a generator.
UPS is operating in Battery Mode; please
check that the input socket of the UPS is in
normal condition.
UPS is operating in Battery Mode; please save
data and close application programs. Replace
input fuse of UPS, then restart UPS. Switch
ON input NFB again.
UPS is operating in Battery Mode; please save
data and close application programs. Make
sure Power Mains is within the voltage range
acceptable to the UPS.
Keep UPS plugged in for at least 24 hours to
fully charge the battery.
Check load level display and reduce loads
from UPS.
Replace the battery. Please call your local
dealer or service personnel; purchase
batteries as specified.
Check load level display and remove
unnecessary loads from the UPS. Re-calculate
and reduce loads connected to the UPS.
Check load devices for failure.
Make sure the UPS is not overloaded. Check if
vents are clogged and the surrounding
temperature is maintained within a proper
range. Waite for 30 minutes to cool down the
UPS. If the UPS cannot be restarted, call your
local dealer or service personnel.
The UPS needs to be serviced. Please call
your local dealer or service personnel.
Check the battery circuit; restart UPS after fully
switching off the unit. Remark: If the battery
circuit is disconnected during the UPS
operation, the next battery test will detect this
condition.
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