Best Power UNITY/I UT310 Manual Del Usuario página 21

Alarm Message
Static switch 2 temp.
shutdown
Static switch 2 temp.
warning
Synchronization error
(This alarm is normal
during a power
outage.)
System in man. bypass
(50 Hz models only.)
What It Means
The temperature on the heatsink for the
bypass static switch is higher than the
shutdown level and the bypass static switch
has opened. The unit switches to battery
operation until the temperature falls below
the shutdown level; then, it transfers back to
normal operation. If the temperature does not
fall to this level before the Low DC
shutdown, there will be no output to the load
equipment.
The temperature on the heatsink for the
bypass static switch is higher than the
warning setpoint. The unit's status does not
change. However, if the temperature
continues to rise, the unit will sound a "Static
switch 2 temp. shutdown" alarm.
The inverter output is not synchronized to the
mains (AC input). The unit will transfer to
battery operation until the unit sounds a "Low
DC shutdown" alarm. If the unit can
synchronize to mains again before that time,
it will transfer back to normal operation.
The internal bypass in 50 Hz units is in the
line position. The unit is in standby and does
not supply output voltage. However, the
loads may be receiving power from the
bypass. If you are servicing the unit, this is
not the recommended bypass method
because hazardous voltages are still inside
the unit. See Section 304.
Find the vents for the UPS fans and check
to see if the fans are operating. Do not
try to open the unit, and do not insert
anything into a fan vent. If the fans are
not operating, call BEST's Worldwide
Service.
If the fans are operating, make sure the
room temperature is below 80
F
(27
C). If not, cool the room. If the room
was below this temperature, call BEST's
Worldwide Service.
Find the vents for the UPS fans and check
to see if the fans are operating. Do not
try to open the unit, and do not insert
anything into a fan vent. If the fans are
not operating, call BEST's Worldwide
Service.
If the fans are operating, make sure the
room temperature is below 80
F
(27
C). If not, cool the room. If the room
was below this temperature, call BEST's
Worldwide Service.
If this alarm happens during the first
startup, the electrician must check the
phase rotation.
If this alarm happens while the unit is
connected to a generator, the unit may be
having problems synchronizing to the
generator. Phone BEST's Worldwide
Service.
If the alarm does not happen during the
first startup and the UPS is not connected
to a generator, phone BEST's Worldwide
Service.
When you are ready to operate the UPS
again, turn the bypass switch back to
UPS. (This switch is inside the door.) If
the bypass switch was not in bypass
position when the unit sounded this
alarm, call BEST's Worldwide Service.
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What to Do