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ONEAC Sinergy UPS User Manual
Chapter 8 Troubleshooting
If a problem occurs in spite of the high reliability of the device, please review the following checks before
calling ONEAC Technical Services.
• Is the UPS plugged into a correctly working grounded receptacle (or for hardwired to confirmed 208
VAC input)?
• Has the fuse blown or have circuit breakers tripped?
Please note the following information when you call for service:
• Information about the device (model number, serial number from serial plate)
Full description of problem (connected loads, does the problem occur regularly or sporadically, display
indicators/alarm etc.)
Table 6. Troubleshooting
Problem
Possible Cause
Action to Take
No indication.
No alarm.
Main switch is OFF.
Switch on main switch.
No mains voltage available.
Have mains checked by qualified electrical
personnel.
Input fuse has blown or input
circuit breaker has tripped.
Replace fuse by identical type or switch on
circuit breaker. If the problem persists, then call
Technical Services.
External batteries are not
connected when powered.
Unit will not run without batteries. Confirm
proper battery connection.
LINE Indicator is not on, acoustical
alarm is given in intervals.
Mains failure.
Normal UPS operation (see also “Operational
Characteristics” on page 21).
LINE Indicator is not on, although mains
voltage is available, acoustical alarm is
given in intervals.
Input fuse has blown
or
input circuit breaker has tripped.
Replace fuse with identical type or switch on
circuit breaker. If the problem persists, then call
Technical Services.
ALARM Indicator is on, continuous
acoustical alarm.
UPS failure.
Press BYPASS switch, then ON switch. If
normal operation does not occur, call Technical
Services.
Over temperature.
Reduce ambient temperature.
Emergency supply time is shorter than
specified.
Batteries are not completely
charged.
Charge batteries (“Installation and
Commissioning” on page 13) and test
emergency supply time. If problem persists,
then call Technical Services.
Batteries are defective or
reached the end of its useful life.
Charging device is faulty.
OVERLOAD LED indicator is on.
Overload at the UPS output.
Reduce load to the permissible value.
