30
Heez +050002745 rel. 1.2 - 16.11.2021
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.
C
ode
D
escription
C
ode
D
escription
A15
ExV: LowSH
A47
Drive offline
A16
ExV: low suction temperature
A48
Digital output configuration error
A17
ExV: LOP
A49
Power supply voltage below minimum thresh-
old
A18
ExV: MOP
A50
PFC error
A20
Overcurrent
A51
DAC/comparator error
A21
HW overcurrent
A52
Inverter module error
A22
Overcurrent rms
A23
Current measurement error
dOr
Alarm 1 door open
A24
Unbalanced compressor currents
E0
Intake probe
A25
Overvoltage
E1
Defrost probe
A26
Undervoltage
E2
Alarm 2 door open
A27
DC bus ripple
E3
HRR no cooling
A28
DC bus voltage out-of-range
A29
DC bus voltage measurement error
E5
Evaporation pressure probe
A30
Power overload
E6
Suction temperature probe
A31
Power supply voltage out-of-range
A32
Power supply voltage acquisition error
E8
Auxiliary pressure probe alarm
A33
Compressor stall
E9
Generic probe alarm
A34
Low cosφ
E12
Max defrost time warning
A35
STO line open
E14
Clock warning
A36
STO fault
E15
IPD no cooling
A37
CPU error
E16
Low evaporation pressure
A38
Custom safety parameters not valid
E17
Maintenance request
A39
CRC error on parameters
E18
Evaporator fan
A40
Reference voltage not valid
E19
Condenser fan
A41
Overtemperature
Err
No terminal-controller communication
A42
Undertemperature
HI
High intake temperature alarm
A43
Thermistor fault
LO
Low intake temperature alarm
A44
Serial communication timeout
LOE
Low evaporation temperature
A45
Default parameters
MAn
Unit test or manual mode
A46
Unexpected stop
Tab. 4.b
