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6.15 Shutdown Procedure
When turning off the UPS, the following shutdown procedure should be used:
Move the “STOP/RUN” key switch, located on the front panel, to “STOP." Operation of the
inverter halts. Output power is now provided to the load through the unit's Bypass circuit.
While in this state of operation; if a power failure occurs in the commercial power
source, the UPS will lose power. Power to the critical load device will be interrupted.
The battery charging circuit and chopper circuit remains active.
DANGER
Do not touch the UPS terminals even though the operation switch has
been moved to the STOP position. The UPS may be supplying power
through the Bypass circuit.
The green AC IN lamp is "on" and the green BYP lamp is "on." The LCD screen shows the
following message:
- BYPASS OPERATION
OUTPUT VOLTAGE=208
V
>CURRENT 100/100/100%
DATE (DAY) TIME
Move the Circuit Breaker to the "off" position. Power is removed from the UPS and to
any attached loads. All lamps are "off" and the LCD screen shows the following message
as long as sufficient power remains to display it:
- OUTPUT SHUT DOWN -
OUTPUT VOLTAGE= 0 V
CURRENT=LOW/LOW/LOW%
When the EPO (Emergency Power Off) switch, located on the front panel (or from a remote
located EPO switch) is pushed, the Circuit Breaker is tripped and power is removed from
the UPS and to any attached loads. All LED lamps are "off" and the LCD screen will
display the following message:
- OUTPUT SHUT DOWN -
OUTPUT VOLTAGE= 0 V
CURRENT=LOW/LOW/LOW%
6.16 Maintenance Bypass Procedure
When operating the Maintenance Bypass, the following operation procedure should be
used:
WARNING
Failure to adhere to the following instructions could result in damage to your
equipment and/or you risk removal of power to any equipment attached to
the UPS.
4200FA CT/XT User’s Manual 48