EA Communication fault between the display board and indoor control board
0 Normal operation; no fault is indicated
1 Outdoor coil-temperature sensor fault
2 Compressor discharge-temperature sensor fault
5 IPM module protection
6 AC supply overvoltage or undervoltage protection
7 Communication fault between the indoor and outdoor units Result 1 of 2 with this code and meaning. Expand for model and series details.
8 Current-overload protection
9 Maximum-current protection
10 Communication fault between the outdoor control board and drive board
11 Outdoor EEPROM fault
12 Outdoor ambient temperature outside the permitted range
13 Compressor discharge-temperature overheat protection
14 Outdoor ambient-temperature sensor fault
15 Compressor shell-temperature overheat protection
16 Indoor anti-freeze protection in cooling or overload protection in heating
17 Power-factor-correction protection
18 DC compressor start failure
19 Compressor-drive fault
20 Outdoor fan-motor locked-rotor protection
21 Outdoor-coil overload protection during cooling
22 Compressor preheating in cold weather; this is a normal operating state
23 Refrigerant-leak detection
24 Outdoor-board chip, drive-board, or compressor mismatch
26 Outdoor heat-sink overheat protection
27 High system-pressure protection
33 Indoor room-temperature sensor fault
34 Indoor coil-temperature sensor fault
36 Communication fault between the indoor and outdoor units
38 Indoor EEPROM fault
39 Indoor fan-motor fault
41 Indoor grounding-protection fault
1 Outdoor ambient-temperature sensor fault
2 Outdoor coil-temperature sensor fault
3 Outdoor-unit overcurrent shutdown
4 Outdoor EEPROM data fault
5 Cooling freeze protection or heating overload protection
7 Communication fault between the indoor and outdoor units Result 2 of 2 with this code and meaning. Expand for model and series details.
13 Compressor overheat-protector fault
16 Cooling-mode overload protection
17 Compressor discharge-temperature sensor fault
18 Abnormal AC supply voltage
19 Compressor suction-temperature sensor fault
22 Outdoor defrosting-sensor fault
23 Expansion-valve A liquid-pipe sensor fault
24 Expansion-valve B liquid-pipe sensor fault
25 Expansion-valve C liquid-pipe sensor fault
26 Expansion-valve D liquid-pipe sensor fault
27 Expansion-valve A gas-pipe sensor fault
28 Expansion-valve B gas-pipe sensor fault
29 Expansion-valve C gas-pipe sensor fault
30 Expansion-valve D gas-pipe sensor fault
45 Outdoor IPM fault
46 Communication fault between the IPM and outdoor control board
47 Compressor discharge temperature too high
48 Upper outdoor DC fan-motor fault
50 Expansion-valve E liquid-pipe sensor fault
67 Fan IPM overheat protection
91 Outdoor-unit shutdown caused by IPM-board overheating
96 Insufficient refrigerant
97 Four-way valve reversing fault
1 Inverter DC overvoltage fault
2 Inverter DC undervoltage fault
3 Inverter AC overcurrent fault
4 Compressor out-of-step detection
5 Compressor phase-loss detection by speed pulsation
6 Compressor phase-loss detection by current imbalance
7 Inverter IPM edge-triggered fault
8 Inverter IPM level-triggered fault
9 Power-factor-correction edge-triggered fault
10 Power-factor-correction level-triggered fault
11 Power-factor-correction power-detection fault
12 Power-factor-correction overcurrent-detection fault
13 Abnormal DC-voltage detection
14 Power-factor-correction low-voltage detection fault
15 Drive-board analogue-to-digital offset fault
16 Inverter PWM logic-setting fault
17 Inverter PWM initialization failure
18 Power-factor-correction PWM logic-setting fault
19 Power-factor-correction PWM initialization fault
20 Drive-board temperature abnormality
21 Shunt-resistance imbalance adjustment fault
22 Communication fault between the drive board and control board
23 Motor-parameter setting fault
25 Drive-board EEPROM data fault
26 Sudden DC-voltage-change fault
27 Compressor D-axis current-control fault
28 Compressor Q-axis current-control fault
29 D-axis current-control integral saturation
30 Q-axis current-control integral saturation
50 Outdoor fan-drive software overcurrent
51 Outdoor fan-motor out-of-step detection
52 Outdoor fan-motor abnormal speed control
53 Outdoor fan-motor phase-loss detection
54 Outdoor fan IPM hardware overcurrent, edge triggered
55 Outdoor fan IPM hardware overcurrent, level triggered
56 Outdoor fan-drive analogue-to-digital offset fault
57 Outdoor fan speed-control integral saturation
58 Outdoor fan D/Q-axis current-control fault
59 Outdoor fan D/Q-axis current-control integral saturation
60 Outdoor fan-motor reverse-rotation fault
61 Outdoor fan IPM-PWM initialization fault
1 Compressor Q-axis current-detection fault
2 Compressor phase-current detection fault
3 Compressor phase-current initialization imbalance
4 Compressor speed-estimation fault
5 Compressor IPM fault output
6 Communication fault between the compressor drive board and control board
7 Abnormal AC supply voltage
8 DC overvoltage fault
9 AC voltage imbalance
10 Power-factor-correction current-detection circuit fault before compressor start
11 AC supply frequency outside the permitted range
12 PFC overcurrent on single-phase units or inverter overcurrent on three-phase units
13 Inverter overcurrent
14 PFC overcurrent on single-phase units or phase imbalance/loss on three-phase units
15 Instantaneous power-off detection
16 Low DC voltage
18 Drive-board EEPROM data fault
19 Communication fault receiving data from the PFC chip
20 Abnormal PFC soft start
21 Communication fault between the compressor-drive chip and PFC chip
101 Frequency increase stopped by overcurrent control
102 Frequency reduced by overcurrent control
103 Frequency increase stopped by IPM temperature control
104 Frequency reduced by IPM temperature control
105 Frequency increase stopped by discharge-temperature control
106 Frequency reduced by discharge-temperature control
107 Frequency increase stopped by outdoor-coil temperature control in cooling
108 Frequency reduced by outdoor-coil temperature control in cooling
113 Frequency increase stopped by indoor-coil freeze or high-temperature control
114 Frequency reduced by indoor-coil freeze or high-temperature control
119 Expansion-valve opening widened by discharge-superheat control
120 Expansion-valve opening narrowed by discharge-superheat control
121 Expansion-valve closing stopped by discharge-superheat control
122 Expansion-valve opening stopped by discharge-superheat control
131 Frequency increase stopped by IPM temperature control
132 Frequency reduced by IPM temperature control
134 Expansion-valve closing stopped by discharge-temperature control
140 Compressor output limited by overload control
141 Compressor output torque limited by overcurrent control
51 Indoor drainage protection
55 Operating-mode conflict between indoor units
64 Communication fault between the indoor and outdoor units
71 Indoor fan-motor zero-crossing check fault
72 Indoor fan-motor fault
73 Indoor EEPROM data-1 fault
74 Indoor EEPROM data-2 fault
81 Indoor ambient-temperature sensor fault
83 Indoor evaporator middle-temperature sensor fault
FE Communication fault between the indoor control board and wired controller
ER Communication fault between the indoor control board and display board
1 Indoor-unit float-switch protection
2 Outdoor high-pressure protection device activated
3 Communication fault between indoor and outdoor units
4 Communication fault between the inverter PCB and outdoor-unit PCB
4 Communication fault between the fan controller and outdoor-unit PCB
5 Incorrect, reversed, or missing power-supply phase
6 Abnormal inverter voltage
6 Abnormal fan-controller voltage
7 Discharge-gas superheat is too low
8 Compressor discharge-gas temperature is too high
0A Communication fault between outdoor units
0B Duplicate or incorrect outdoor-unit address setting
0C More than one outdoor unit is set as the main unit
11 Indoor inlet-air thermistor fault
12 Indoor outlet-air thermistor fault
13 Indoor freeze-protection thermistor fault
14 Indoor gas-pipe thermistor fault
19 Indoor fan protection device activated
21 High-pressure sensor fault
22 Outdoor-air thermistor fault
23 Compressor discharge-gas thermistor fault
24 Outdoor heat-exchanger liquid-pipe thermistor fault
25 Outdoor heat-exchanger gas-pipe thermistor fault
29 Low-pressure sensor fault
31 Indoor and outdoor capacity settings do not match
35 Duplicate indoor-unit number
36 Incorrect or incompatible indoor-unit combination
38 Outdoor protection-device detection circuit fault
3A Outdoor-unit capacity is outside the permitted range
3B Incorrect outdoor-unit model combination or voltage setting
3D Communication fault between main and sub outdoor units
43 Low compression-ratio protection activated
44 Low-pressure increase protection activated
45 High-pressure increase protection activated
46 High-pressure decrease protection activated
47 Low-pressure decrease or vacuum-operation protection activated
48 Inverter overcurrent protection activated
51 Inverter current-sensor fault
53 Inverter driver protection signal detected
54 Inverter heat-sink temperature fault
55 Inverter PCB failure
56 Outdoor fan-motor position-detection fault
57 Fan-controller protection activated
58 Fan-controller fault
5A Fan-controller heat-sink temperature fault
5B Fan-controller overcurrent protection activated
5C Fan-controller current-sensor fault
EE Compressor protection alarm after repeated high-risk protection events
A1 Active-filter fault
A6 Refrigerant cooling-module temperature fault
B1 Outdoor unit or refrigerant-cycle number is set outside the permitted range
B5 Incorrect number of connected indoor units