Service manual

Always On UPS Systems Inc

• SHORT CIRCUIT – UPS output is in a short circuit state.

• FUSE/OVER TEMP SD – inverter has shutdown due to inverter fuse open or

heat sink temperature above operating parameters.

• INVERTER FAIL SHUTDOWN – inverter has shutdown due to inverter

output voltage below tolerances.

• BYPASS ON SHUTDOWN – inverter has shutdown because the bypass

breaker has been activated while the inverter is supplying power to the load.

• HIGH DC SHUTDOWN – inverter has shutdown because the DC Bus

voltage is outside of operating parameters while the inverter is operating.

• OVERLOAD SHUTDOWN – inverter has shutdown because an overload

condition has been detected on the output. The inverter will automatically

restart after the condition has been removed for a period of seven seconds.

• 70% LOAD – load connected to the output is over 70% of the UPS rating.

• 110% LOAD - load connected to the output is over 110% of the UPS rating.

• 125% LOAD - load connected to the output is over 125% of the UPS rating.

• 150% LOAD - load connected to the output is over 150% of the UPS rating.

• RESERVE AC FAIL – supply voltage to the Reserve is outside of operating

window.

• RESERVE FREQ FAIL – supply frequency to the Reserve is outside of

operating window.

• BATTERY LOW – the DC bus (or battery) voltage is lower than 320VDC.

Low battery shutdown is approaching.

• BATTERY LOW SHUTDOWN – the inverter has shutdown because the

DC bus (or battery) voltage is below operating level (lower than 295VDC).

• RECT AC FAIL – supply to rectifier is outside of operating window.

• ROTATION ERROR – supply phase rotation is incorrect.

• RECTIFIER SHUTDOWN – the rectifier has shutdown because the DC bus

voltage has exceeded maximum operating level (over 445VDC). The rectifier

will automatically restart 30 seconds this abnormal condition has been

cleared.

• HIGH DC – the DC voltage has exceeded maximum operating level (over

430VDC). The bus voltage is limited to this voltage.

• BOOST CHARGE – the batteries are being boost charged by the rectifier.

• BATTERY TEST – batteries are being tested.

• EMERGENCY STOP – the inverter has shutdown because the emergency

stop switch has been activated.

• DATA LINE – blinks when data is being transmitted or received via the

communication port.

D: Buzzer outlet: There is a buzzer located behind the LCD Display. The buzzer will allow for

audile notification when an abnormal condition occurs. The buzzer will be

activated if one of the following conditions occur: (The frequency of the

buzzer is also described for your reference.)

• INVERTER IS OVERLOADED >110%, beep once / 3 seconds