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10. TROUBLESHOOTING
The aim of this chapter is to identify potential issues, understand the root cause of the problems and provide
solution to them.
10.1. Bypass voltage failure Alarm
It means that bypass voltage is out of the limit.
Make sure that the bypass
circuit breaker is “ON”
and the voltage / frequency is between the bypass limit.
10.2. Bypass phase sequence wrong Alarm
It means that phase sequence of bypass voltage is not OK. Phase sequence of the bypass should be changed.
Please contact the INFORM Technical Assistance Centre.
10.3. Inverter not sync. with bypass Alarm
Frequency of bypass voltage is beyond the frequency range for online operation or bypassvoltage is out of
limit. Check if the bypassvoltage is in specified limits.
10.4. Input phase sequence wrong Alarm
It means that phase sequence of common mains supply voltage is not OK. Phase sequence of common mains
supply input should be changed. Please contact the INFORM Technical Assistance Centre.
10.5. Rectifier not sync. with input Alarm
Frequency of common mains supply voltage is beyond the frequency range of rectifier or common mains
supply voltage is out of limit. Check if common mains supply is in specified limits.
10.6. DC voltage failure Alarms
Any of the DC bus voltages is out of the limit. If you encounter this alarm during start-up, check if the inrush
circuit breaker is at
“ON”
position. Check polarity of external battery connections if any. If it still exists
contact the INFORM Technical Assistance Centre.
10.7. ESD active Alarm
It means that Emergency Switching Device (ESD)
is activated (digital input “UPS OFF” is set high)
. Check if
ESD switch is ON or not.
10.8. Ambient temperature high Alarm
It is shown “
Ambient temperature high
” on Diagnostics Menu. If the ambient temperature is high, it causes
a rise in
the internal temperature
of UPS and this alarm appears. In this case; the first thing to do is cool the
environment.
10.9. Overload Alarms
Loads connected to the output of the UPS exceed the nominal power of the unit so it gives “
Rectifier
overload
” and/or “
Output overload
” alarms. Check if there is an overload and origin, remove the excessive
load. Hence the alarm would switch to off.
Residual voltage and high temperature metal parts inside even if the UPS is disconnected.
Contact may cause electric shock and burns. All operations except replacing battery fuses
shall be carried out by the authorized INFORM UPS Technical Service Personnel only.
