Vertiv I Liebert Air Cooled Condenser I User Manual 27
Alarm number
ID
Alarm name Cause Troubleshooting
failure
Jumper caps are not used to short
terminals J17 and J18 of current
pressure sensor
Install the jumper cap when the
current pressure sensor is
configured
Pressure sensor failed
Replace the pressure sensor and
compare the result of two boards
The fan speed controller board has a
hardware fault
Replace the fan speed controller
board and compare the result of two
boards
A07
EEPROM
read fault
The fan speed controller board has a
hardware fault
Replace the fan speed controller
board and compare the result of two
boards
A08
Hardware
over current
The fan cannot run normally Check that the fan runs normally
The fan speed controller board has a
hardware fault
Replace the fan speed controller
board and compare the result of two
boards
A09
Bus over
voltage
The power supply voltage is
abnormal
Check the power supply
The fan speed controller board has a
hardware fault
Replace the fan speed controller
board and compare the result of two
boards
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