32
17
Negative battery charger
fault
The negative battery charger is fault. The charger will
be shut down.
18
Battery under-voltage
The battery voltage is too low and the charger has been
deactivated.
19
Battery over-voltage
The battery voltage is too high and the charger has been
deactivated.
20
Battery under-voltage
pre-warning
The UPS is in battery operation and the battery voltage is
low.
Note: Runtime is limited in duration.
21
Mains freq. abnormal
Mains frequency is out of limit range and results in
rectifier shutdown.
22
Mains volt. Abnormal
Mains Voltage exceeds the upper or lower limit and
results in rectifier shutdown.
23
Inverter fault
When inverter has been turned on for a certain time, but
the output voltage of inverter is still out of the range of
Rating v12.5% and
–25%, inverter fault will
occur, and the inverter will be shut down and UPS will
transfer to bypass. This fault cannot be cleared until this
unit is completely powered off.
24
Inverter IGBT bridge direct
conduct protection
If the two IGBTs in the same bridge of inverter are on
simultaneously, inverter should be shut down
25
Inverter Thyristor
short
fault
SCR at the inverter side is short-circuited
26
Inverter Thyristor broken fault
SCR at the inverter side is open-circuited
27
Bypass Thyristor short fault
SCR at the bypass side is short-circuited
28
Bypass Thyristor broken fault
SCR at the bypass side is open-circuited
29
CAN comm. Fault
The CAN bus communication fails
30
Parallel system load sharing
fault
If any unit in a parallel system has an unbalance load
share that exceeds 30%, this warning will occur.
31
Bypass Site W iring Fault
Wrong phase rotation on the bypass side.
32
System Not Synchronized
To Bypass.
System cannot synchronize to bypass. Bypass Mode
may not be available.
33
Bypass unable to trace
Bypass is unable to trace
34
Bypass Not Available
The frequency or voltage is out of acceptable range for
bypass. This message occurs when the UPS is online,
and indicates that the bypass mode may not be available
if required.
35
IGBT over current
IGBT current is over limit.
36
Parallel cable connection error
If a unit is set as parallel mode, but parallel cable is not
connected correctly, this warning will occur
37
Parallel relay fault
Relay of parallel circuit must be turned on when the
system are in parallel and the inverter is on. If the relay of
parallel circuit cannot be turned on correctly, this unit
should be shut down (include inverter and bypass). This
fault cannot be cleared until this unit is completely
powered off.
38
LBS Not SYNC.
Two parallel systems are not in synchronization.
39
initialization fault
When the procedure of initialization is wrong, this
warning will occur.
40
Inverter is invalid
The inverter on button has been activated.
41
Overload
The load exceeds the system power capacity.
42
Parallel Overload
The UPS parallel system is confirmed to be overloaded
according to the set number.
43
DC component over limitation
If the DC component of the UPS output rating power is
larger than the limitation, this warning should occur
44
Bypass over current
When the bypass current exceeds the limitation, this
alarm will occur.
Summary of Contents for YDC9300-RT Series
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