Service manual

Always On UPS Systems Inc

 Fans will start, output voltage will be present.

 Indicators will show normal inverter operation of the system.

h. Turn Inverter Off – push buttons on front panel.

- This will turn the inverter OFF and put the UPS in Static bypass mode. Reserve

power will feed the output of the UPS. The switch from inverter to reserve

power should be seamless and uninterrupted.

 Indicators will show Static Bypass status.

i. Turn Inverter ON – push buttons on front panel.

- Inverter will ramp up for 7 seconds then Static switches will transfer to Inverter

mode. The switch from reserve power to inverter should be seamless and

uninterrupted.

 Indicators will show normal inverter operation of the system.

j. Backup Mode test – turn Input Breaker to OFF position.

- Utility power will be removed from the UPS inputs.

- Rectifier will become disabled and the Batteries will be providing DC power to

the Inverter. The switch to backup mode should be seamless and uninterrupted.

- Indicators will show backup mode operation, UPS will be beeping.

- Rectifier AC Fail, Rotation Error, Reserve AC Fail, Reserve Freq Fail

k. Rectifier restart – Turn Input breaker to ON position.

- Rectifier will ramp up its DC output voltage over a period of 20 seconds and

assume the load from the battery bank. It will then provide charging current to

the batteries.

- Indicators will show normal rectifier and inverter operation of the system.

Record UPS status

o Out of service, bypass mode

o Status form

o Customer’s comments

11.2. From Manual Bypass To Inverter Procedure

Follow Step by step - confirming each operation

Use the Status Indicator Table as a guideline.

Note: Proceed until a failure mode occurs – then record status of indicators and step failure

occurred.

If Fault cleared during restart

Do operational checks of all UPS functions.

Backup mode, charging, etc

Record status and readings on commissioning / repair forms.

a. Close all fuse holders behind control module assembly door.

b. Turn Reserve Breaker to ON position and wait 15 seconds

- This will apply power to the auxiliary power supply systems, which in turn,

will start the main control electronics inside the UPS.

- LCD lights up – displays general information about the UPS