Lcd Indication For Fault Information - Liebert UPS System User Manual

7.4 LCD indication for fault information

The LCD on the UPS displays the fault information of Table 7-1 and Table 7-2. The
user should locate and analyze the fault according to the tables and feedback the
fault information to our service engineers.
No.1 Fault description
Communication of
1
inverter fails
Communication of
2
rectifier fails
Ambient over-
3
temperature
Environment
4
parameter 1 abnormal
Environment
5
parameter 2 abnormal
Environment
6
parameter 3 abnormal
Environment
7
parameter abnormal
Rectifier input voltage
8
abnormal
Rectifier input under-
9
voltage
Rectifier's input
voltage frequency is
10
abnormal
11 Input fuse blows
Input transformer over
12
temperature
Input phase rotation
13
reverse
14 Input softstart fails
Chapter 7 Troubleshooting
Table 7-1 Fault information
Reason
Communication between monitoring
unit and inverter fails
Communication between monitoring
unit and rectifier fails
over-temperature of UPS room
Environment parameter channel 1
has alarm
Environment parameter channel 2
has alarm
Environment parameter channel 3
has alarm
12V environment parameter channel
has alarm
Line-to-neutral voltage of rectifier
exceeds normal operation range
Line-to-neutral voltage of rectifier
lower than 305V, but higher than
208V
Rectifier frequency exceeds
normal range
Rectifier input fuse blows up
Temperature of input transformer is
too high
Rectifier's input phase rotation is
reverse
Input softstart fails
83
Actions to be taken
Notify the service engineer for repairing
Notify the service engineer for repairing
Check the ventilation of UPS room
Check the devices relating to the channel
Check the devices relating to the channel
Check the devices relating to the channel
Check the devices relating to the channel
Check the line-to-neutral
amplitude of rectifier
Check the line-to-neutral
amplitude of rectifier
the Check the rectifier's
frequency
Notify the service dept for repairing
Check the ambient temperature and
ventilation
Notify the UPS service engineer, check
the wiring of rectifier input cables
Notify the service dept for repairing
voltage
voltage
input voltage