Shield M10U, Руководство пользователя, Страница: 60 / 72

Chapt
er 7 Operator Control and Display Panel
Shield M10U user manual 51
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 inverter IGBTs. The UPS recovers automatically after the over
temperature signal disappears.
If over temperature exists, check:
Whether the ambient temperature is too high.
Whether the ventilation channel is blocked.
Whether fan fault happens.
Whether inverter overload time is out.
39 On UPS Inhibited
Inhibit system transfer from bypass to UPS (inverter). Check:
Whether the power module’s capacity is big enough for load.
Whether the rectifier is ready.
Whether the bypass voltage is normal.
40 Manual Transfer Byp Transfer to bypass manually
41 Esc Manual Bypass
Escape from “transfer to bypass manually” command. If UPS has been
transferred to bypass manually, this command enable UPS to transfer to
inverter.
42 Battery Volt Low
Battery Voltage is Low. Before the end of discharging, battery voltage is low
warning should occur. After this pre-warning, battery should have the capacity
for 3 minutes discharging with full load.
43 Battery Reverse Battery cables are connected not correctly.
44 Inverter Protect
The N# Power Module Inverter Protect. Check:
Whether inverter voltage is abnormal
Whether inverter voltage is much different from other modules, if yes, please
adjust inverter voltage of the power module separately.
45 Input Neutral Lost
The mains neutral wire is lost or not detected. For 3 phases UPS, it’s
recommended that user use a 3-poles breaker or switch between input power
and UPS.