Programming and Set-Up - Operation Modes
990-2440 AIS 5000 400V Installation Manual 73
Normal to Manual Bypass Operation
Caution
CAUTION!
Never operate the manual bypass switch when the UPS is in normal operation.
Press and the cursor keys or un ti l th e display
shows:
Press . If the bypass mains is within tolerance range, the UPS will
transfer to electronic bypass. The display shows:
Make sure that the Bypass Stat ic Switch is turned on.
Switch on the Manual Bypass Switch (Q050).
Switch off the Output Breaker Q100.
Push the S002 button on the front panel in order to turn the UPS off. The UPS
changes to standby operation. Display shows:
Switch off the Q090, Q001 and Q004 breakers.
Wait 30 seconds until the UPS display and all LED indications are switched
off.
Note
The load is now supplied directly from the bypass mains.
Caution
CAUTION!
When the UPS is in bypass operation, the load support will be disrupted if the bypass
mains fails.
Bypass Operation:
OFF
Bypass Operation
Standby