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34008236EN/AA - Page 17
5. Maintenance
5.1 Troubleshooting
Troubleshooting a UPS equipped with the HotSwap MBP module
Indication Diagnostic Correction
1 When the UPS is started using button
(24), all the LEDs go ON once and the
buzzer beeps once, then LED (26)
remains ON.
The remote power off (RPO)
contact has been activated to shut
down the UPS and now prevents
restart.
Set the contact back to its normal
position and press button (24) to
restart.
2 Button (24) and LEDs (25) and (26) are
ON and all the LEDs on bargraph (20)
flash.
The percent load is greater than the
set overload level or UPS capacity.
Check the power drawn by the
connected devices and disconnect
any non-priority devices. Check the
overload level setting.
3 Button (24) and LED (27) are ON and
all the LEDs on bargraph (20) are
flashing.
A critical overload has occurred on
the UPS output. If AC input power
fails, the load will not be supplied in
battery mode.
Check the power drawn by the
connected devices and disconnect
any non-priority devices.
4 LED (27) is ON and all the LEDs on
bargraph (21) are flashing.
A battery fault has been detected
during the automatic test.
Replace the battery module (see
section 5.2, Battery-module
replacement).
5 LED (27) alone is ON and the buzzer
sounds continuously.
A UPS internal fault has occurred
and the load is not supplied.
Call the after-sales support
department.
Indication Diagnostic Correction
6 The load is no longer supplied when
the rotary switch (49) on the HotSwap
MBP module is set to Bypass position.
◗ The protected devices are
connected to the UPS output
instead of to the HotSwap MBP
module.
◗ The AC-power cord is connected
to the UPS input instead of to the
HotSwap MBP module.
Check the wiring between the UPS
and the HotSwap MBP module (see
section 2.6).
7 The load is no longer supplied when
the rotary switch (49) on the HotSwap
MBP module is set to Normal position.
◗ The UPS is shut down.
◗ The wiring between the UPS and
the HotSwap MBP module is
incorrect.
◗ Start the UPS.
◗ Check the wiring between the UPS
and the HotSwap MBP module (see
section 2.6).
8 The load is no longer supplied after
AC-power fails.
◗ The rotary switch (49) on the
HotSwap MBP module is set to
Bypass position.
◗ The wiring between the UPS and
the HotSwap MBP module is
incorrect.
◗ Set the rotary switch (49) on the
HotSwap MBP module to Normal
position.
◗ Check the wiring between the UPS
and the HotSwap MBP module (see
section 2.6).
If a fault leads to UPS shutdown, press the ON/OFF button (24) to clear the fault.