19
H
3.
To cancel the Self-test, press key for 3~5 seconds, the UPS will
switch back to Normal mode and the LCD display will shows as drawing C.
3.3.4. Shut Off the UPS
1. Press the Inverter switch of the UPS for about 3~5 seconds, the UPS will
switch the output from inverter to bypass, and the LCD display shows as
drawing B.
2. Switch off the Input Breaker of the UPS.
3.3.5. Maintenance Bypass Mode
This is for Maintenance purpose. A Non-authorized Technician is not allowed
to operate the following procedures. If there is any damage under unauthorized
condition, your warranty will be void immediately.
1. When the UPS is in Normal mode, press the Inverter Switch of the UPS for
3~5 seconds, the LCD display shows as drawing B, now the UPS is in
Bypass mode.
2. Remove the protecting bracket of the MTBS switch. Turn the MTBS switch
from INV to MTBS.
3. Switch off the Input Breaker of UPS.
4. Now the Utility is in Maintenance Bypass loop. The technician may maintain
or remove the UPS safely.
To switch back from Maintenance Bypass to UPS
1. Repeat the step 5 of Chapter 3.3.1 to set the UPS to Bypass mode. Turn
the Maintenance Bypass switch to “INV” Position, and then fasten the
breaker cover back. Repeat the Step 6 to 8 of Chapter 3.3.1 to switch back
the UPS to Normal mode.
