Shutdown Procedure - Toshiba 4200 series Operation Manual

6.12 Shutdown Procedure

When turning off the UPS, the following shutdown procedure should be used:
1) Move the unit's STOP/RUN key switch, located on the front panel, to STOP. Operation of
the UPS unit's inverter stops. 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, then the UPS will lose power and power to the load device will be
interrupted. The UPS unit's battery charging circuit and chopper circuit remains activated.
Do not touch the UPS terminals even though the operation switch has
DANGER
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:
Move the MCCB power switch(es) 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:
When the emergency power off (EPO) switch, located on the front panel (or from a remote
located EPO switch) is pushed, the MCCB is tripped and power is removed from the UPS
and to any attached loads (see Section 6.6 "EPO Function"). All LED lamps are "off" and the
LCD screen will display the following message:
TOSHIBA
- BYPASS OPERATION
OUTPUT VOLTAGE=207V
>CURRENT 100/100/100%
DATE (DAY) TIME
- OUTPUT SHUT DOWN -
OUTPUT VOLTAGE= 0V
CURRENT=LOW/LOW/LOW%
- OUTPUT SHUT DOWN -
OUTPUT VOLTAGE= 0V
CURRENT=LOW/LOW/LOW%
30
Note: Actual numerical values may
differ from these examples.