3 | COMMISSIONING AND MAINTENANCE
26
Tabella allarmi
Faults are signalled by means of LED 1 blinking.
Led 1
Description
Remarks
1
External unit microprocessor fault
The unit resets after problem resolution
2
Power module fault
After 3 consecutive interventions in 10 minutes, the unit resets after problem
resolution
3
Main electronic board protection against
overcurrent
After 3 consecutive interventions in 30 minutes, the unit resets after problem
resolution
4
Communication error between main board and
power module
The alarm activates 4 minutes after the unit start
The unit resets after problem resolution
6
Wrong power supply voltage
The unit resets after problem resolution
6
Compressor lockout
After 3 consecutive interventions in 10 minutes, the unit resets after problem
resolution
8
Overheat protection for compressor discharge The unit resets automatically when the temperature drops under 110°C After 3
consecutive interventions in 30 minutes, the unit resets after problem resolution
After 3 consecutive interventions in 30 minutes, the unit resets after problem
resolution
9
Fan motor malfunction
After 3 consecutive interventions in 30 minutes, the unit resets after problem
resolution
10
Defrost temperature sensor failure
The unit resets after problem resolution
11
Suction probe fault or suction overtemperature The unit resets automatically when the temperature drops under 40°C or after
problem resolution
12
External air probe fault
The unit resets after problem resolution
13
Discharge temperature sensor failure
The alarm activates 4 minutes after the unit start
After 3 consecutive interventions in 30 minutes, the unit resets after problem
resolution
14
Compressor suction overtemperature
The alarm activates 10 minutes after the unit start
The alarm activates if temperature exceeds 40°C for 5 consecutive minutes
The unit resets after problem resolution
15
Communication error between outdoor and
indoor unit
The alarm activates 4 minutes after the unit start
The unit resets after problem resolution
16
Lack of refrigerant
The alarm activates 5 minutes after the unit start
After 2 consecutive interventions in 20 minutes, the unit resets after problem
resolution
17
4-way valve malfunction
The alarm activates 5 minutes after the unit start
The alarm activates when, in Heating mode, the temperature detected by the indoor
unit heat exchanger probe is less than or equal to 15 °C for 1 minute and for 3 times
in an hour
18
Deviate from the normal for the compressor
The unit resets after problem resolution
19
Power module malfunction
After 3 consecutive interventions in 10 minutes, the unit resets after problem
resolution
20
Electronic board overtemperature protection
sensor fault
After 3 consecutive interventions in 1 hour, the unit resets after problem resolution
21
Internal unit overload
The unit resets after problem resolution
22
Internal unit anti-freeze protection
The alarm activates when the indoor unit heat exchanger probe is lower than the
setpoint for 2 minutes
The unit resets after problem resolution
24
Compressor motor overcurrent
The unit resets automatically
25
Overcurrent protection for single- phase of the
compressor
The unit resets after problem resolution
