Operations
26 IST5 Tower UPS 10kVA~40kVA User Manual
Bypass abnormal or out of normal range, or static bypass switch
fault
Load supplied by inverter
Inverter on, start, synchronization or standby (ECO mode) for at
least one module
System output not supplied by inverter, inverter fault for at least one
module.
System output supplied by inverter, inverter fault for at least one
module.
Inverter not operating for all modules
UPS overload time is out, or output short, or output no power supply
There are two different types of audible alarm during UPS operation, as shown in Table
4.2.
Table 4.2 Description of audible
alarm
Two short alarm
with a long one
when system has general alarm (for example: AC fault),
When system has serious faults (for example: fuse or hardware fault)
4.2.2 Control and Operation Keys
Control and operation keys include four keys, which are used together with LCD screen.
The functions description is shown in Table 4.3.
Table 4.3 Functions of Control and operation keys
Long press
，
cut off the load power (shut down the rectifier, inverter,
static bypass and battery)
Attention
When bypass frequency is over track, there is interruption time(less than 10ms) for transferring from
bypass to inverter.
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