Manual Bypass Operation Check - Powertronix Quasar Service Manual

Service Manual
3.5.4

Manual Bypass Operation Check

The manual bypass allows the UPS to be switched OFF while the critical load is maintained.
The following procedure describe the confirmation of this function.
1. Press the `MENU' push button (a) on the FRONT PANEL.
a) Select the `COMMAND' screen by pressing either the `BACK' (c) or `NEXT' (b) push button.
b) Confirm the `COMMAND' menu selection by pressing `BACK' and `NEXT' at the same time (i.e. ENTER).
c) Select the `SWITCH LOAD' function by pressing either `BACK' or `NEXT'.
d) Confirm `SWITCH LOAD' function by pressing `BACK' and `NEXT' at the same time.
D A ***CONFIRMED*** message will be displayed
2. Press `CLEAR' (d) twice to return to the main menu.
The following change-over sequence should occur, indicating that the load has been transfer to the bypass line:
D The yellow `BYPASS ON' LED ( 4 ) is illuminated
D The green `LOAD on INV' LED is extinguished.
3. To turn off the Inverter follow the procedure below:
a) Press the `MENU' push button (a) on the FRONT PANEL.
b) Select the `COMMAND' screen by pressing either the `BACK' (c) or `NEXT' (b) push button.
c) Confirm the `COMMAND' menu selection by pressing `BACK' and `NEXT' at the same time (i.e. ENTER).
d) Select the `INVERTER ON-OFF' screen by pressing either the `BACK' (c) or `NEXT' (b) push button.
e) Confirm `INVERTER OFF' function by pressing `BACK' and `NEXT' at the same time.
D A ***CONFIRMED*** message will be displayed
f) Press `CLEAR' twice to return at the main screen.
4. The follow sequence should occur:
D The Alarm buzzer is activated.
D The Red general `ALARM' red LED ( 2 ) will illuminate.
D The Yellow `BYPASS ON' LED ( 4 ) will illuminate.
D The Green `NORMAL' LED will extinguish.
D The LCD will display the following messages:
`LOAD ON BYPASS' and
`INVERTER OFF'.
5. Remove the Mechanical Lock from the MANUAL BYPASS MCB ( I3 )
6. Close the. MANUAL BYPASS MCB ( I3 )
7. Open the `UPS OUTPUT' MCB ( I4 ).
8. Open the `MAINS INPUT' MCB ( I1 ).
9. Open the `RESERVE INPUT' MCB ( I2 ).
10. Open the `INTERNAL BATTERY' fused switch ( I5 ).
11. Check that the load continues to be powered from the Maintenance Bypass Mains supply while the UPS is
off.
RETURN FROM MANUAL BYPASS TO NORMAL OPERATION
1. Close the `RESERVE INPUT' MCB. ( I2 )
D wait until the fan is running, indicating that the output voltage is present.
2. Close the `MAINS INPUT' MCB. ( I1)
Wait until the Operator panel shows the following indications:
D LCD is energize and
D The alarm buzzer sounds.
D The red `ALARM'LED ( 2 )
D The yellow `BYPASS ON' LED will illuminate.
3. Close the `INTERNAL BATTERY' fused switch. ( I5 ).
4. Close the `UPS OUTPUT' MCB. ( I4 ).
5. Open the `MANUAL BYPASS' MCB. ( I3 ).
6. Start the inverter as follow:
a) Press the `MENU' push button (a) on the FRONT PANEL.
b) Select the `COMMAND' screen by pressing either the `BACK' (c) or `NEXT' (b) push button.
c) Confirm the `COMMAND' menu selection by pressing `BACK' and `NEXT' at the same time (i.e. ENTER).
3x3 UPS Commissioning
Issue 2 - November 2001
Chapter 3 - Commissioning
Validating the Installation
3 - 9