39
COMMISSIONING AND MAINtENANCE
utdoor unit
display
Malfunction description
Malfunction diagnosis
Remarks
9
Fan motor malfunction
Damaged fan motor
Restorable
10
Defrost probe (Te) fault
Wiring fault
Restorable
Electrical circuits damaged
The probe detects a temperature below -55 °C
11
Suction probe(Ts) fault
The probe detects a temperature over 90 °C
Restorable
Probe short circuit
Wiring fault
The probe detects a temperature below -55 °C
12
Outdoor probe (Ta) fault
The probe detects a temperature over 90 °C
Restorable
Probe short circuit
Wiring fault
The probe detects a temperature below -40 °C
13
Discharge probe (Td) fault
The probe detects a temperature over 90 °C
Restorable
Probe short circuit
Wiring fault
The probe detects a temperature below -40 °C
14
Overvoltage to the power factor correction circuit (PFC)
The probe detects a temperature over 150 °C
Not restorable
Probe short circuit
Wiring fault
Voltage detected to the power factor correction circuit (PFC)
15
Communication error between outdoor and indoor unit
The outdoor unit main board cannot communicate with the
indoor unit main board for more than 4 minutes
Restorable
16
Refrigerant loss
After 10 minutes of compressor functioning the temperature
difference between refrigerant discharge and suction is > 80 °C
Not restorable if the alarm
occurs 3 times in 1 hour
17
Discharge pipe blocked
After 10 minutes of compressor functioning the temperature
difference between indoor unit exchanger and ambient
temperature is > 5°C
Not restorable if the alarm
occurs 3 times in 1 hour
4-way valve malfunction
18
Loss of synchronism compressor motor
Compressor motor overload detected
Not restorable
19
Voltage at the compressor control module (DC or AC) too low
Fluctuations in motor load detected
Restorable
Compressor current sensor fault
AC: Compressor control module detected voltage lower than 155
VAC
20
Indoor unit heat exchanger detected temperature too high
DC: Compressor control module DC-bUS detected voltage lower
than180 VDC
Automatic restore after 3
minutes if the temperature
drops below 52 °C
The indoor unit exchanger probe detects a temperature higher
than 63 °C
21
Indoor unit heat exchanger detected temperature too low
The indoor unit exchanger probe detects a temperature too low
The outdoor unit stops to
prevent frost of the heat
exchanger and too cold air
emission
22
Overcurrent to the power factor correction circuit (PFC)
Overcurrent detected to the power factor correction circuit (PFC)
Not restorable
23
Compressor control module (PIM) temperature too high
The compressor control module probe detects a temperature
higher than 90 °C
Not restorable if the alarm
occurs 3 times in 1 hour
24
Compressor cannot start
No compressor start-up detected
Not restorable
25
Compressor control module overcurrent
Wiring fault
Not restorable if the alarm
occurs 3 times in 1 hour
Detected a compressor control module input curret higher than
microprocessor setting
26
Compressor control module phase lack
Phase disconnected (ony for three-phases models)
Not restorable
27
Inlet current sampling circuit malfunction
Inlet current sampling module fault
Not restorable
28
Compressor wiring fault
Lost connection between compressor and control module
Not restorable
37
Compressor overload detected by the control module
Overload detected for an electrical supply phase
Not restorable
38
Control module temperature sensor fault
The probe detects a temperature lower than -25 °C
Restorable
39
Outdoor air exchanger temperature sensor (Tc) fault
The probe detects a temperature over 150 °C
Restorable
The probe detects a temperature below -55 °C
42
High pressure switch cut-out
The probe detects a temperature over 90 °C
Not restorable if the alarm
occurs 3 times in 1 hour
The pressure switch is open for 30 seconds after the compressor
worked for 3 minutes
43
Low pressure switch cut-out
The pressure switch is open for 60 seconds after the compressor
worked for 3 minutes
Not restorable
The pressure switch is open for 30 seconds after the compressor
status is stand-by
44
Outdoor exchanger temperature too high
The Tc probe detects a temperature higher than 65 °C
Not restorable if the alarm
occurs 3 times in 1 hour
The Te probe detects a temperature higher than 65 °C
45
System low pressure protection cut-out
In cooling mode the indoor unit pipe probe (Tm) detects a
temperature lower than -45 °C
Not restorable
In heating mode the external unit heat exchanger probe (Tc)
detects a temperature lower than -45 °C
In heating mode the defrost probe (Te) detects a temperature
lower than -45 °C
Содержание 20153499
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