E1 High-pressure protection Result 1 of 4 with this code and meaning. Expand for model and series details.
E3 Low-pressure protection Result 1 of 3 with this code and meaning. Expand for model and series details.
E5 Over-current protection
E7 Mode conflict between indoor and outdoor units
F1 Indoor ambient temperature sensor fault
F2 Indoor evaporator temperature sensor fault
F3 Outdoor ambient temperature sensor fault
F4 Outdoor tube temperature sensor fault
F5 Compressor discharge temperature sensor fault
H1 Defrost status or defrost-related operation
H5 IPM or power-module protection
C5 Jumper cap or board configuration fault
U3 DC bus-bar voltage drop
L9 Power protection
E1 Compressor high pressure protection
E2 Freeze protection
E3 Compressor low pressure protection, refrigerant lacking protection, or refrigerant recycling mode
E4 Compressor high discharge temperature protection
E6 Communication malfunction
E8 Malfunction of indoor fan motor
E9 Full water protection
F0 Malfunction of indoor ambient temperature sensor
F1 Malfunction of evaporator temperature sensor
F2 Malfunction of condenser temperature sensor
F3 Malfunction of outdoor ambient temperature sensor
F4 Malfunction of discharge temperature sensor
F5 Malfunction wired controller temperature sensor
C5 Wrong dial switch of capacity
EE Malfunction of outdoor main control memory chip
PF Malfunction of electric box sensor
H3 Compressor overload protection Result 1 of 3 with this code and meaning. Expand for model and series details.
H4 Overload protection
H5 IPM protection Result 1 of 3 with this code and meaning. Expand for model and series details.
H6 Malfunction of DC fan motor
H7 Drive desynchronizing protection
HC PFC protection Result 1 of 4 with this code and meaning. Expand for model and series details.
L1 Malfunction of humidity sensor
LC Start-up failure
LD Compressor phase protection
LF Power protection
LP Models of indoor unit and outdoor unit do not match
U7 Direction changing malfunction of 4-way valve
P0 Drive reset protection
P5 Overcurrent protection
P6 Communication malfunction between main control and drive
P7 Malfunction of drive module sensor
P8 High temperature protection of drive module
P9 Zero-cross protection
PA AC current protection
PC Malfunction of drive current
PD Sensor connection protection
PE Temperature excursion protection
PL Low voltage protection of bus bar
PH High voltage protection of bus bar
PU Charging circuit malfunction
PP Abnormity of input voltage
EE Malfunction of outdoor drive memory chip
U8 Zero-cross detection circuit malfunction
b5 Liquid valve temperature sensor is open or short-circuited
b7 Gas valve temperature sensor is open or short-circuited
U1 Phase current detection circuit malfunction for compressor
HE Compressor demagnetization protection Result 1 of 2 with this code and meaning. Expand for model and series details.
UP Charging capacitor malfunction
E1 High pressure protection of system
E3 Low pressure protection of system
H3 Compressor overload protection Result 2 of 3 with this code and meaning. Expand for model and series details.
PL Indoor unit and outdoor unit do not match
EE Memory chip malfunction
dn Wrong communication wire connection or electronic expansion valve malfunction
U5 Complete-unit current detection malfunction
L3 Outdoor fan 1 malfunction
dd Wrong communication wire connection or electronic expansion valve detection status
E7 Mode conflict
Fo Refrigerant recycling mode
LA X-fan operation
H1 Defrosting or oil return in heating mode
Lc Compressor start failure
E4 High discharge temperature protection of compressor Result 1 of 2 with this code and meaning. Expand for model and series details.
E8 Overload protection
E5 Whole-unit overcurrent protection
P5 Compressor phase current protection
H7 Compressor desynchronizing
dL Compressor phase-lacking or phase-inverse protection
H5 IPM module protection
LP DC bus-bar low-voltage protection
PH DC bus-bar high-voltage protection
HC PFC protection Result 2 of 4 with this code and meaning. Expand for model and series details.
U7 Four-way valve is abnormal
43 Communication failure with Unit A
44 Communication failure with Unit B
45 Communication failure with Unit C
46 Communication failure with Unit D
47 Unit A freeze protection
48 Unit B freeze protection
49 Unit C freeze protection
50 Unit D freeze protection
51 Unit A overheating prevention protection
52 Unit B overheating prevention protection
53 Unit C overheating prevention protection
54 Unit D overheating prevention protection
55 Unit A communication wire misconnection or expansion valve malfunction
56 Unit B communication wire misconnection or expansion valve malfunction
57 Unit C communication wire misconnection or expansion valve malfunction
58 Unit D communication wire misconnection or expansion valve malfunction
A0 Unit waiting for debugging. System must be placed in startup mode.
A2 Pump down mode.
A3 Defrosting Result 1 of 2 with this code and meaning. Expand for model and series details.
A4 Oil-return
A6 Heat pump function setting
A7 Quiet mode setting
A8 Vacuum pump mode
A9 Set Back function
Ab Emergency stop of operation Result 1 of 2 with this code and meaning. Expand for model and series details.
AC Cooling Result 1 of 2 with this code and meaning. Expand for model and series details.
AE Charge refrigerant manually
AF Fan Result 1 of 2 with this code and meaning. Expand for model and series details.
AH Heating Result 1 of 2 with this code and meaning. Expand for model and series details.
AJ Cleaning reminding of filter
AP Debugging confirmation when starting up the unit
AU Long-distance emergency stop Result 1 of 2 with this code and meaning. Expand for model and series details.
Ay Shielding status
b1 Malfunction of Outdoor Ambient Temperature Sensor (RT7) (CN421 Blue)
b2 Malfunction of Defrosting Temperature Sensor (RT3) (CN422 White)
b4 Malfunction of Sub-Cooler Liquid Outlet Temperature Sensor (RT5) (CN416 Red)
b5 Malfunction of Sub-Cooler Gas Outlet Temperature Sensor (RT4) (CN416 Red)
b6 Malfunction of Accumulator Inlet Temperature Sensor (RT1) (CN422 White)
b7 Malfunction of Accumulator Inlet Temperature Sensor (RT2) (CN422 White)
bd Malfunction of Sub-Cooler Gas Inlet Temperature Sensor (RT6) (CN416 Red)
bH Clock of system is abnormal
bJ High-pressure sensor and low-pressure sensor are connected reversely
C0 Communication malfunction between IDU, ODU and IDU’s wired controller
C1 Communication malfunction between main control and DC-DC controller
C2 Communication malfunction between main control and inverter compressor driver
C3 Communication malfunction between main control and inverter fan driver
C4 Malfunction of lack of IDU
C5 Alarm because project code of IDU is inconsistent
CH Rated capacity is too high
CL The matching ratio of rated capacity for IDU and ODU is too low
CP Malfunction of multiple wired controllers. See owner’s manual for the controller.
d1 Indoor Unit Main Control Board Malfunction
d3 Malfunction of ambient temperature sensor Result 1 of 2 with this code and meaning. Expand for model and series details.
d4 Malfunction of inlet-tube / pipe temperature sensor. See indoor unit service manual.
d5 Malfunction of mid-tube / pipe temperature sensor. See indoor unit service manual.
d6 Malfunction of outlet-tube / pipe temperature sensor. See indoor unit service manual.
d7 Malfunction of humidity sensor. See indoor unit service manual.
d9 Malfunction of jumper cap. See indoor unit service manual.
db Debugging status
dC Setting capacity of DIP switch code is abnormal. See indoor unit service manual.
dH PCB of wired controller is abnormal. See indoor unit service manual.
dL Malfunction of air outlet temperature sensor. See indoor unit service manual.
dn Malfunction of swing parts
E0 Malfunction of ODU / Also displays error code
E1 High-pressure protection Result 2 of 4 with this code and meaning. Expand for model and series details.
E2 Discharge low-temperature protection Result 1 of 2 with this code and meaning. Expand for model and series details.
E3 Low-pressure protection Result 2 of 3 with this code and meaning. Expand for model and series details.
E4 High discharge temperature protection of compressor Result 2 of 2 with this code and meaning. Expand for model and series details.
Ed Drive IPM low temperature protection
F0 Main board of ODU is poor
F1 Malfunction of High Pressure Sensor (Wiring Diagram:SP1) (Connector:CN425 Red)
F3 Malfunction of Low Pressure Sensor (Wiring Diagram:SP2) (Connector:CN426 Blue)
F5 Malfunction of Discharge Temperature Sensor of Compressor (Wiring Diagram:RT8) (Connector:CN423 Black)
FP Malfunction of DC motor Result 1 of 2 with this code and meaning. Expand for model and series details.
H0 Malfunction of driving board of fan
H1 Driving board of fan operates abnormally
H2 Voltage protection of driving board power of fan
H3 Reset protection of driving module of fan
H4 Drive PFC protection of fan
H5 Over-current protection of inverter fan
H6 Drive IPM module protection of fan
H7 Malfunction of drive temperature sensor of fan
H8 Drive IPM high temperature protection of fan
H9 Desynchronizing protection of inverter fan
HA Malfunction of drive storage chip of inverter outdoor fan
HC Malfunction of current detection circuit of fan drive
HE Phase-lacking of inverter fan
HF Malfunction of charging loop of fan drive
HH High-voltage protection of fan’s drive DC bus bar
HJ Failure startup of inverter fan
HL Low voltage protection of bus bar of fan drive
HP AC current protection of inverter fan
HU AC input voltage of drive of inverter fan
J1 Over-current protection of compressor 1
J7 Gas-mixing protection of 4-way valve
J8 High pressure ratio protection of system
J9 Low pressure ratio protection of system
JA Protection because of abnormal pressure
JL Protection because high pressure is too low
L0 Malfunction of IDU
L1 Protection of indoor fan
L3 Water-full protection
L4 Abnormal Power for wired controller
L5 Freeze prevention protection
L6 Mode conflict / Only applies to systems using a 24 volt adapter
L7 No main IDU: During debugging one of the indoor units is designated as master to change or correct this use wireless remote or wired controller.
L8 Power is insufficient
L9 For single control over multiple units, number of IDU is inconsistent (HBS network)
LA For single control over multiple units, IDU series is inconsistent (HBS network)
Lb For single control over multiple units, IDU is inconsistent (reheating-dehumidifying system)
LC IDU is not matching with outdoor unit
LH Alarm due to bad air quality Result 1 of 2 with this code and meaning. Expand for model and series details.
LJ Setting of functional DIP switch code is wrong
LL Malfunction of water flow switch
LP Zero-crossing malfunction of PG motor
LU Zero-crossing malfunction of PG motor
n0 See operation setting of system
n1 Defrosting cycle K1 setting
n3 Compulsory defrosting
n4 Limit setting for max. capacity/output capacity
n5 Compulsory excursion of engineering code of IDU
n6 Inquiry of malfunction / see previous faults up to 5 are stored
n7 Inquiry of parameters
n8 Inquiry of project code of IDU
n9 Check number of indoor units that are communicating.
nA Heat pump unit
nb Bar code inquiry
nC Cooling Mode only.
nE Negative code. Displays circularly with a two-digit number (Mpa) to indicate a negative pressure.
nF Fan Mode only.
nH Heating Mode only.
nJ High temperature prevention when heating
nn Length modification of connection pipe of ODU
nU Eliminate the long-distance shielding command of IDU
P0 Malfunction of driving board of compressor
P1 Driving board of compressor operates abnormally
P2 Voltage protection of driving board power of compressor
P3 Reset protection of driving module of compressor
P4 Drive PFC protection of compressor
P5 Over-current protection of inverter compressor
P6 Drive IPM module protection of compressor
P7 Malfunction of drive temperature sensor of compressor
P8 Drive IPM high temperature protection of compressor
P9 Desynchronizing protection of inverter compressor Result 1 of 2 with this code and meaning. Expand for model and series details.
PA Malfunction of drive storage chip of compressor
PC Malfunction of current detection circuit drive of compressor
PE Phase-lacking of inverter compressor
PF Malfunction of charging loop of driven of compressor
PH High-voltage protection of compressor’s drive DC bus bar
PJ Failure startup of inverter compressor
PL Low voltage protection for DC bus bar of drive of compressor
PP AC current protection of inverter compressor
PU AC input voltage of drive of inverter compressor
U0 Preheat time of compressor is insufficient
U2 Wrong setting of ODU’s capacity code/jumper cap
U4 Refrigerant-lacking protection
U5 Wrong address for driving board of compressor
U6 Alarm because valve is abnormal
U8 Malfunction of pipeline for IDU
U9 Malfunction of pipeline for ODU
UC Setting of main IDU is succeeded
UE Charging of refrigerant is invalid
L0 Malfunction of indoor unit
L9 Wrong number of indoor units for one-to-more indoor-unit control
d8 Malfunction of water temperature sensor
L1 Indoor fan protection
LA Wrong series for one-to-more indoor-unit control
d9 Malfunction of jumper cap
L2 Electric-heater protection
LH Alarm due to bad air quality Result 2 of 2 with this code and meaning. Expand for model and series details.
dA Abnormal address for indoor unit
L3 Water overflow protection
LC Indoor-unit model cannot match the outdoor-unit model
dH Abnormal PCB for wired controller
L4 Overcurrent protection
d1 Poor indoor PCB
dC Abnormal capacity code-dial setting
L5 Freeze-prevention protection
d3 Malfunction of ambient temperature sensor Result 2 of 2 with this code and meaning. Expand for model and series details.
dL Malfunction of air-exhaust temperature sensor
L6 Mode conflict
d4 Malfunction of entry-tube temperature sensor
dE Malfunction of indoor carbon-dioxide sensor
L7 No main indoor unit
d6 Malfunction of exit-tube temperature sensor
C0 Communication malfunction
L8 Insufficient power supply
d7 Malfunction of humidity sensor
AJ Filter-cleaning reminder
db Engineering debugging code
d5 Malfunction of middle-tube temperature sensor
E0 Malfunction of outdoor unit
E1 High-pressure protection Result 3 of 4 with this code and meaning. Expand for model and series details.
E2 Discharge low-temperature protection Result 2 of 2 with this code and meaning. Expand for model and series details.
E3 Low-pressure protection Result 3 of 3 with this code and meaning. Expand for model and series details.
E4 High discharge-temperature protection of compressor
F0 Main board of outdoor unit is faulty
F1 Malfunction of high-pressure sensor
F3 Malfunction of low-pressure sensor
F5 Malfunction of compressor discharge-temperature sensor
J1 Overcurrent protection of compressor 1
b1 Malfunction of outdoor ambient-temperature sensor
b2 Malfunction of defrosting-temperature sensor 1
b4 Malfunction of sub-cooler liquid-temperature sensor
b5 Malfunction of sub-cooler gas-temperature sensor
P0 Malfunction of compressor driving board
P1 Compressor driving board operates abnormally
P2 Compressor driving-board power-voltage protection
P3 Reset protection of compressor driving module
P4 Compressor drive PFC protection
P5 Overcurrent protection of inverter compressor
U0 Compressor preheat time is insufficient
U2 Wrong outdoor-unit capacity code or jumper-cap setting
U5 Wrong address for compressor driving board
C2 Communication malfunction between main control and inverter-compressor driver
C4 No indoor unit detected
C5 Indoor-unit project-code conflict
A0 Unit waiting for debugging
A1 Inquiry of compressor operating parameters
A3 Defrosting Result 2 of 2 with this code and meaning. Expand for model and series details.
A4 Oil return
A5 Online test
n0 System SE-operation setting
n1 Defrosting-cycle K1 setting
n2 Indoor/outdoor capacity-distribution upper-limit setting
q1 Low-temperature anti-ice setting
q2 Compressor-frequency shield setting
q3 Target low-pressure correction upper limit Z0
q4 Target low-pressure correction upper limit Z2
q5 General-unit or high-sensible-heat-unit setting
J7 Gas-mixing protection of four-way valve
J8 High-pressure-ratio protection of system
JA Protection due to abnormal pressure
b6 Malfunction of gas-liquid-separator inlet-temperature sensor
b7 Malfunction of gas-liquid-separator outlet-temperature sensor
b9 Malfunction of heat-exchanger temperature sensor
bH System clock is abnormal
P6 Compressor drive IPM-module protection
P7 Malfunction of compressor drive-temperature sensor
P8 Compressor drive IPM high-temperature protection
P9 Desynchronizing protection of inverter compressor Result 2 of 2 with this code and meaning. Expand for model and series details.
PH High-voltage protection of compressor drive DC bus
U6 Alarm because a valve is abnormal
U8 Short-circuit malfunction of indoor unit
U9 Outdoor-unit pipeline malfunction
CH Rated connected capacity is too high
A6 Heat-pump function setting
A7 Quiet-mode setting
A8 Vacuum-pump mode
A9 IPLV test
AA EU AA-level EER test mode
AH Heating Result 2 of 2 with this code and meaning. Expand for model and series details.
n6 Unit malfunction inquiry
n7 Unit parameter inquiry
n8 Indoor-unit engineering-number inquiry
nA Heat-pump unit
nH Heating-only unit
q6 Engineering-capacity correction-factor setting
q7 Celsius or Fahrenheit selection
q8 Low-temperature discharge-protection correction setting
q9 Defrost-mode setting
qA Heat-recovery status
qH Main body conducts heating
EC Drop protection of compressor 1 discharge-temperature sensor
FP Malfunction of DC motor Result 2 of 2 with this code and meaning. Expand for model and series details.
JL High-pressure protection
PC Compressor drive current-detection circuit malfunction
PL Low-voltage protection of compressor drive DC bus
PE Phase loss of inverter compressor
PF Compressor drive charging-circuit malfunction
PJ Failure to start inverter compressor
PP AC-current protection of inverter compressor
HC Fan-drive current-detection circuit malfunction
HL Low-voltage protection of fan-drive DC bus
HE Phase loss of inverter fan
HF Fan-drive charging-circuit malfunction
HJ Failure to start inverter fan
HP AC-current protection of inverter fan
UC Main indoor-unit setting succeeded
UL Wrong button-dial setting
UE Refrigerant charging is invalid
CC No main control unit detected
CL Rated connected capacity is too low
CF Multiple main control units detected
CJ Multiple main wired controllers detected
CP Multiple main wired controllers detected
AC Cooling Result 2 of 2 with this code and meaning. Expand for model and series details.
AL Automatic refrigerant charging
AE Manual refrigerant charging
AF Fan Result 2 of 2 with this code and meaning. Expand for model and series details.
AP Debugging startup confirmation
nC Cooling-only unit
nE Negative-sign code
nF Fan model
qC Main body conducts cooling
qL Static-pressure setting
qE EVI-operation status setting
qF Compulsory cooling mode
qJ Dual-heat-source water emptying
CU Communication malfunction between indoor unit and receiving lamp plate
Cb IP-address allocation overflow
AU Long-distance emergency stop Result 2 of 2 with this code and meaning. Expand for model and series details.
Ab Emergency stop of operation Result 2 of 2 with this code and meaning. Expand for model and series details.
Ad Limit operation
qy Compressor heating-zone working mode
C5 Malfunction of jumper cap
E6 Communication malfunction between indoor unit and outdoor unit
H5 IPM protection Result 2 of 3 with this code and meaning. Expand for model and series details.
L3 Malfunction of outdoor fan 1 / DC motor
LA Malfunction of outdoor fan 2 / DC motor
H3 Overload protection of compressor
F0 Refrigerant-insufficient or refrigerant cut-off protection
F1 Indoor ambient-temperature sensor open or short circuit
F2 Indoor evaporator-temperature sensor open or short circuit
H6 No feedback from indoor-unit motor
LP Indoor and outdoor unit capacity mismatch
C4 Outdoor-unit jumper-cap malfunction
b7 Gas-valve temperature sensor open or short circuit
b5 Liquid-valve temperature sensor open or short circuit
E1 High-pressure protection of system
E3 Low system-pressure or compressor low-pressure protection
E4 High compressor discharge-temperature protection Result 1 of 2 with this code and meaning. Expand for model and series details.
E5 AC overcurrent protection
E7 Mode conflict between indoor units
E8 High-temperature prevention protection
EE Outdoor-unit EEPROM malfunction
Fo Refrigerant-recovery mode
F3 Outdoor ambient-temperature sensor open or short circuit
F4 Outdoor condenser-temperature sensor open or short circuit
F5 Outdoor discharge-temperature sensor open or short circuit
FC Sliding-door micro-switch malfunction
H7 Compressor desynchronization Result 1 of 2 with this code and meaning. Expand for model and series details.
HC PFC protection Result 3 of 4 with this code and meaning. Expand for model and series details.
HE Compressor demagnetization protection Result 2 of 2 with this code and meaning. Expand for model and series details.
UF Communication malfunction between indoor unit and inspection board
L1 Humidity-sensor malfunction
L9 High-power protection Result 1 of 2 with this code and meaning. Expand for model and series details.
LC Compressor start-up failure Result 1 of 2 with this code and meaning. Expand for model and series details.
Ld Compressor lost-phase fault
P5 Compressor over-phase-current protection
oE Unspecified outdoor-unit fault
P6 Communication malfunction between drive board and main board
P7 Module-temperature-sensor circuit malfunction
P8 Module overheating protection
PF Drive-board ambient-temperature sensor malfunction
PH DC bus voltage too high Result 1 of 2 with this code and meaning. Expand for model and series details.
PL DC bus voltage too low Result 1 of 2 with this code and meaning. Expand for model and series details.
PU Capacitor charging malfunction
rF RF-module malfunction
U1 Phase-current detection circuit malfunction
U2 Compressor lost-phase protection
U3 DC bus voltage-drop malfunction Result 1 of 2 with this code and meaning. Expand for model and series details.
U5 Unit current-detection malfunction
U7 Four-way valve malfunction Result 1 of 2 with this code and meaning. Expand for model and series details.
U8 Indoor-unit zero-crossing signal malfunction
U9 Outdoor-unit zero-crossing malfunction
E2 Evaporator anti-freezing protection status
E9 Anti-cold-air protection status
EA Refrigerant leak alarm
E1 High-pressure protection Result 4 of 4 with this code and meaning. Expand for model and series details.
E2 Evaporator anti-freezing protection
E3 System blockage, refrigerant leakage, or low-pressure protection
E4 High compressor discharge-temperature protection Result 2 of 2 with this code and meaning. Expand for model and series details.
E5 Overcurrent protection
E6 Indoor/outdoor communication fault
E8 High-temperature resistance protection
EE EEPROM malfunction
C5 Jumper-cap malfunction
F0 Insufficient refrigerant or refrigerant cut-off protection
F1 Indoor ambient-temperature sensor fault
F2 Indoor evaporator-temperature sensor fault
F3 Outdoor ambient-temperature sensor fault
F4 Outdoor condenser-temperature sensor fault
F5 Outdoor discharge-temperature sensor fault
PH DC bus voltage too high Result 2 of 2 with this code and meaning. Expand for model and series details.
PL DC bus voltage too low Result 2 of 2 with this code and meaning. Expand for model and series details.
P5 Compressor phase-current overcurrent protection
PU Capacitor-charging malfunction
P7 Module temperature-sensor circuit malfunction
P8 Module high-temperature protection
H3 Compressor overload protection Result 3 of 3 with this code and meaning. Expand for model and series details.
H5 IPM protection Result 3 of 3 with this code and meaning. Expand for model and series details.
H7 Compressor desynchronization Result 2 of 2 with this code and meaning. Expand for model and series details.
HC PFC protection Result 4 of 4 with this code and meaning. Expand for model and series details.
L3 Outdoor DC fan-motor malfunction
L9 High-power protection Result 2 of 2 with this code and meaning. Expand for model and series details.
LP Indoor/outdoor unit capacity mismatch
LC Compressor start-up failure Result 2 of 2 with this code and meaning. Expand for model and series details.
U1 Compressor phase-current detection-circuit malfunction
U3 DC bus voltage-drop malfunction Result 2 of 2 with this code and meaning. Expand for model and series details.
U5 Complete-unit current-detection malfunction
U7 Four-way valve malfunction Result 2 of 2 with this code and meaning. Expand for model and series details.
E9 Water-overflow protection
EU High module-temperature frequency limitation
F6 Overload frequency limitation
F8 Overcurrent frequency decrease
F9 High discharge-temperature frequency decrease
FH Anti-freezing frequency decrease
P0 Compressor test-frequency state P0
P1 Compressor test-frequency state P1
P2 Compressor test-frequency state P2
P3 Compressor test-frequency state P3