- 19 -
5.10Mute alarm sound
Press the ON button once to mute the alarm sound. User can notice the alarm from ALARM indicator.
5.11 Force bypass
Press and hold OFF button for 8 seconds or until AUTO BYPASS indicator is lit and then release to force
bypass. The UPS will alarm to inform the user that loads are consuming power directly from bypass power
source. To transfer loads to consume protected power from the UPS again, press and hold ON button for
2 seconds or until alarm beep sound then release.
5.12 Manual maintenance bypass
5.12.1 Press and hold OFF button for 8 seconds or until AUTO BYPASS indicator is lit and then release to force
bypass. The UPS will alarm to inform the user that loads are consuming power directly from bypass
power source.
5.12.2 Turn the MAINTENANCE MANUAL BYPASS switch to position BYPASS (B). MAINTENANCE BYPASS
indicator is lit.
5.12.3 Press and hold OFF button until alarm beep sound to turn off the UPS.
5.12.4 Turn off INPUT circuit breaker.
5.12.5 Turn off BATTERY circuit breaker.
5.12.6 Contact service center.
Once the UPS is recovered, start-up the UPS following the start-up procedure. Then turn the MAINTE-
NANCE MANUAL BYPASS switch to position AUTO (A).
5.13 Emergency power off (EPO)
The Emergency Power Off is controlled by microprocessor. Press ON and OFF button simultaneously for
3 seconds. UPS will stop all operations include INVERTER, RECTIFIER and CHARGER operation, but the battery
still supply power to microprocessor. To maintain battery power, turn off all circuit breakers by turn off the
BATTERY circuit breaker at last.
