Shield T3 60 – 500KVA User Manual
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31
Module Exit
Power Module is pulled out from system.
32
Rectifier Fail
The N# Power Module Rectifier Fail, The rectifier is fault and
results in rectifier shutdown and battery discharging.
33
Inverter Fail
The N# Power Module Inverter Fail. The inverter output
voltage is abnormal and the load transfers to bypass.
34
Rectifier Over
Temp.
The N# Power Module Rectifier Over Temperature. The
temperature of the rectifier IGBTs is too high to keep
rectifier running. This alarm is triggered by the signal from
the temperature monitoring device mounted in the rectifier
IGBTs. The UPS recovers automatically after the over
temperature signal disappears.
If over temperature exists, check:
1. Whether the ambient temperature is too high.
2. Whether the ventilation channel is blocked.
3. Whether fan fault happens.
4. Whether the input voltage is too low.
35
Fan Fail
At least one fan fails in the N# power module.
36
Output Over
load
The N# Power Module Output Over Load. This alarm
appears when the load rises above 100% of nominal rating.
The alarm automatically resets once the overload condition
is removed.
1. Check which phase has overload through the load (%)
displayed in LCD so as to confirm if this alarm is true.
2. If this alarm is true, measure the actual output current to
confirm if the displayed value is correct.
Disconnect non-critical load. In parallel system, this alarm
will be triggered if the load is severely imbalanced.
37
Inverter
Overload Tout
N# Power Module Inverter Over Load Timeout. The UPS
overload status continues and the overload times out.
Note:
The highest loaded phase will indicate overload timing-out
first.
When the timer is active, then the alarm “unit over load”
should also be active as the load is above nominal.
When the time has expired, the inverter Switch is opened
and the load transferred to bypass.
If the load decreases to lower than 95%, after 2 minutes,
the system will transfer back to inverter mode. Check the
load (%) displayed in LCD so as to confirm if this alarm is
true. If LCD displays that overload happens, then check the
actual load and confirm if the UPS has over load before
alarm happens.
38
Inverter Over
Temp.
The N# Power Module Inverter Over Temperature.
The temperature of the inverter heat sink is too high to
keep inverter running. This alarm is triggered by the signal
from the temperature monitoring device mounted in the
