Frequency converter 1
Unit
Fault code
Category
Alarm description
Troubleshooting
(See appendix 1: "Simplified diagrams" for the location of dampers, sen-
sors, air directions, etc.)
xx yy
z
01 01
4
One or more phases
between frequency
converter and motor
is/are short-circuited to
earth
● Check the cable between frequency converter 1 and motor
01 02
4
Max. motor current
from frequency con-
verter exceeds limit by
300%
● Check for low voltage to frequency converter 1
01 03
4
Frequency converter
DC circuit max. voltage
exceeds limit
● Check for overvoltage to frequency converter 1
01 04
2
Frequency converter
DC circuit voltage too
low when motor(s)
start(s)
● Check for low voltage to frequency converter 1
01 05
4
Frequency converter
DC circuit voltage too
low when VEX unit
stops
● Check for low voltage to frequency converter 1
01 06
4
Frequency converter
power supply has lost
a phase
● Check wiring from the power supply connection to the isolation
switch in the VEX unit
● Check cable connections from the isolation switch to frequen-
cy converter 1
01 07
4
Frequency converter
power supply to mo-
tor(s) has lost a phase
● Check the cable between frequency converter 1 and motor
● Check for a short circuit in the motor windings
01 08
4
Frequency converter
overheated (based on
internal calculations)
● Check if the temperature at frequency converter 1 exceeded
the permitted 35°C when the alarm was tripped. If the temper-
ature has been too high, the unit will restart when the air tem-
perature falls below 35°C.
01 10
4
Frequency converter
cooling coil overheated
● Check if the temperature at frequency converter 1 exceeded
the permitted 35°C when the alarm was tripped. If the temper-
ature has been too high, the unit will restart when the air tem-
perature falls below 35°C.
01 11
4
Frequency converter
motor(s) drawing too
much current
Fault on frequency converter 1
01 12
4
Frequency converter
motor 1 overheated
● Check the motor impeller can turn freely
● Check that the fan impeller is not blocked
01 13
4
Frequency converter
motor 2 overheated
● Check the motor impeller can turn freely
● Check that the fan impeller is not blocked
01 14
4
No modbus communi-
cation to frequency
converter
● Check the cable between the connection board and frequency
converter 1
3005167-2022-02-02
Alarms
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Содержание EXact2 VEX240 series
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