5.3 BASIC TROUBLESHOOTING
This paragraph provides the basic information if any problems occur during the start-up procedure.
In case the problem cannot be solved, contact the service department.
1) After closing RCB the LCD display is still blank
• Check the phase rotation of supply voltage.
• Make sure the input voltage and frequency are within tolerance.
• Check the rectifier protection fuses F1-F2-F3; they are inside the unit.
2) After step #1 the UPS stops the starting sequence and shows one or more alarm messages
• Check the alarms indicated on the display and remove their causes.
• Close RCB and try to restart the UPS.
3) After step #2 the unit shows the alarm A15 – Byp fault
• Make sure the switch SBCB is closed.
• Check the protection fuses of the static bypass switch; they are inside the unit.
• Check the phase rotation of the bypass voltage.
• Make sure voltage and frequency are within tolerance.
4) After step #3 the unit shows the alarm A7 – BCB open
• Make sure you have closed the battery circuit breaker; the circuit breaker or the fuse
holder is external to the UPS system.
• Check the battery fuses.
• Check the interconnection between the auxiliary contact of the battery circuit breaker
(in the external cabinet) and the terminals X10-9/10.
5.4 SHUT-DOWN PROCEDURE
No. ACTION LCD DISPLAY OPERATING CHECKS
1
Open OCB
A30 GENERAL ALARM The supply to the load is interrupted.
LED #7 off.
2
Open BCB
A30 GENERAL ALARM The battery is disconnected from the
rectifier. Led #4 red flashing.
3
Open SBCB
A30 GENERAL ALARM The bypass supply is disconnected. LED
#2 off.
4
Open RCB
A30 GENERAL ALARM Rectifier and inverter shutdown.
5
BLANK End of shutdown procedure.
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