
30
H050002740 rel. 1.1 - 17.05.2021
Checks before commissioning
ENG
4.4 Alarm table
When an alarm occurs, the LED on the controller turns red and the user terminal displays the corresponding alarm code.
Code Description
Reset
Effect
Buzzer LED Priority
Delay
(s)
No. of
activat.
Evaluation
period (s)
A20
Overcurrent
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A21
HW overcurrent
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A22
Overcurrent rms
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A23
Current measure-
ment error
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A24
Unbalanced com-
pressor currents
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A25
Overvoltage
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A26
Undervoltage
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A27
DC bus ripple
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A28
DC bus voltage
out-of-range
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A29
DC bus voltage
measur. error
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A30
Power overload
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A31
Input voltage out
of range
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A32
Power supply
voltage acquisition
error
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A33
Compressor stall
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A34
Low cosphi
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A35
STO line open
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Serious
0
5
3600
A36
STO fault
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Serious
0
5
3600
A37
CPU error
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A38
CRC error on
parameters
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A39
CRC error on
parameters
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A40
Reference voltage
not valid
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A41
Overtemperature
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A42
Undertemperature Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A43
Thermistor fault
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A44
Serial communica-
tion timeout
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A45
Default parameters Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A46
Unexpected stop
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Normal
0
5
3600
A47
Drive offline
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Serious
0
5
3600
A48
Digital output
configur. error
Semi-auto
Compressor off. Up to five restart attempts
without considering the timers
9
9
Serious
0
5
3600