Vertiv I Liebert Air Cooled Condenser I User Manual
26
4.2
Troubleshooting
Refer Table 4-1 for alarm troubleshooting.
Table 4-1 Table of alarm troubleshooting
Alarm number
ID
Alarm name
Cause
Troubleshooting
A00
Phase loss
alarm
One phase or two phases of
three-phase voltage are lost
Check that the three-phase voltage
is correct
The fan speed controller board has a
hardware fault
Replace the fan speed controller
board and compare the result of two
boards
A01
PIM over
temperature
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
A02
A03
Fan 1 over
temperature,
Fan 2 over
temperature
The fan cannot run normally
Check that the fan runs normally
The AC contactor supplying power
for fan has fault or its wire cuts off
Check the wiring of AC contactor;
detect the auxiliary contact state of
AC contactor
The fan speed controller board has a
hardware fault
Replace the fan speed controller
board and compare the result of two
boards
A04
A05
Fan 1 over
Temperature
locked, Fan 2
over
Temperature
locked
The fan cannot run normally
Check that the fan runs normally
The AC contactor supplying power
for fan has fault or its wire cuts off
Check the wiring of AC contactor;
detect the auxiliary contact state of
AC contactor
The fan speed controller board has a
hardware fault
Replace the fan speed controller
board and compare the result of two
boards
A06
Pressure
sensor
The pressure sensor is not installed
or its terminal connection is poor
Check the wiring of pressure sensor
