ONEAC S07KXAU, Operating Manual

Troubleshooting

Sinergy S II Series Series UPS User Instruction Manual

21

Troubleshooting

If problems should occur in spite of the high reliability of this device, please check the following points 
before contacting Technical Support:

• Is the mains voltage present at the UPS input?

• Is the input fuse blown or have circuit breakers tripped?

When contacting Technical Support, please have the following information ready:

• UPS information 

- model number

- part number

- serial number as per nameplate

• An exact description of the problem (what loads are being operated, does the problem occur 

regularly or sporadically, etc.) including any fault message description(s).

Table 3. Troubleshooting

Problem

Possible cause

Corrective Actions

Overload LED blinks/buzzer beeps 
once per second.
UPS is in bypass.

• UPS is overloaded.
• Overload is too large or long.
• (Unit on AC Power)

• Check the power drawn by the equipment 

and disconnect any short circuited or 
non-priority devices.

Overload LED blinks/buzzer beeps 
continuously.
Load is dropped

• UPS is overloaded.
• Overload is too large or long.
• (Unit on Battery Power)

• Check the power drawn by the equipment 

and disconnect any short circuited or 
non-priority devices. 

• Restart the UPS.

Battery LED blinks/ buzzer beeps.

• A battery fault was detected during the 

automatic battery test.

• Check that battery connector is properly 

seated. 

• Replace the battery module.

Battery LED blinks/ buzzer sounds 
long beep about once every hour.

• The battery is at end of life; runtime on 

battery is compromised.

• Reset alarm by pressing LED test/Alarm 

Reset buttons on the front of unit 

• Replace the battery module.

Site wiring fault LED blinks. 
Red LED behind UPS on.
Buzzer sounds continuously.

• Phase reversal (line and neutral) has 

been detected on input power.

• If one side of input power is to be a 

grounded neutral (typically 120 volts 
systems or 230 volt TN systems) have 
electrician correct reversal in receptacle or 
power system. 

• If neither side of input power is to be a 

grounded neutral (typically phase to phase 
208 volts, or 230 volt TX systems) disable 
function by pressing the push-button on the 
rear of the UPS between fan and battery 
connector for five seconds. Note: Disabling 
this function must occur within 30 minutes of 
initial power up of unit.

Fault LED blinks.
Buzzer sounds continuously.

• UPS has detected a fault.

• Call technical support.