Warning & Error Codes-56,57,58,59 Series

Codes on Display

Descriptions Indoor Unit LED Display
C1 Current arch protection Running LED-Off 3S, Blinks 12 times
C2 Current leakage protection Running LED-Off 3S, Blinks 13 times
C3 Mis-wiring protection Running LED-Off 3S, Blinks 14 times
C5 Jumper error protection Running LED-Off 3S, Blinks 15 times
C6 No-ground Running LED-Off 3S, Blinks 16 times
Cd Too much CO2 protection TBD
CF Current short-cut protection TBD (Buzzer will sound once every 2 sec.)
d1 WSHP: UV light error TBD
E0 Commercial: Water pump overload/error/flow switch error Running LED-Off 3S, Blinks 10 times
E1 System high pressure protection Running LED-Off 3S, Blinks 1 time
E2 Anti-freezing protection (heat exchanger-ID, OD) Running LED-Off 3S, Blinks 2 times
E3 Low pressure protection (run cooling when OD is too cold) Running LED-Off 3S, Blinks 3 times
E4 Compressor dischage pressure too high Running LED-Off 3S, Blinks 4 times
E5 System/compressor current too high Running LED-Off 3S, Blinks 5 times
E6 Communication error (ID-OD) Running LED-Off 3S, Blinks 6 times
E7 Mode clash (some ID runs cooling/fan, some runs heating Running LED-Off 3S, Blinks 7 times
EA VRF: Oil valve protection TBD
Ec Commercial & VRF: Water flow protection (lack of water flow) TBD
Ed System temperature too high TBD
EE Memory chip error (U5) Heating LCD-Off 3S, Blinks 15 times
EF Outdoor fan motor overload TBD
EL Fire alarm TBD
EP Shell top high temperature protection TBD
F0 System refrigerant lack or restriction protection Cooling LED-Off 3S, Blinks 10 times
F3 Outdoor abmient temperature sensor error Cooling LED-Off 3S, Blinks 3 times
F8 Incoming water temperature sensor error Cooling LED-Off 3S, Blinks 8 times
F9 Outgoing water temperature sensor error Cooling LED-Off 3S, Blinks 9 times
FA Oil temperature sensor error TBD
Fd Suction gas temperature sensor error TBD
FE User side water sensor error TBD
FL Water tank-middle sensor error TBD
FP CO2 checking error TBD
FU Shell top temperature sensor error protection TBD
H1 Heating-Defrosting, or oil return TBD
H2 Static electric de-dust protection Heating LED-Off 3S, Blinks 2 times
H3 Compressor over-temperature protection Heating LED-Off 3S, Blinks 3 times
H4 System abnormal (many different other reasons…) Heating LED-Off 3S, Blinks 4 times
H5 IPM abnormal / Control Module Protection Heating LED-Off 3S, Blinks 5 times
H6 Indoor fan motor-no feedback Running LED-Off 3S, Blinks 11 times
H7 Comopressor loses steps, not being able to check rotor position Heating LED-Off 3S, Blinks 7 times
HC PFC board abnormal / PFC protection Heating LED-Off 3S, Blinks 6 times
HE Compressor de-managet protection (rotor locked /doesn’t rotate) Heating LED-Off 3S, Blinks 14 times
L0 Airflow switch error TBD
L1 Humidity sensor error TBD
L2 Water level switch error / hot water tank level switch error TBD
L3 Outdoor DC motor error (L3 for dual -mtor 1, LA for motor 2) Running LED-Off 3S, Blinks 23 times
L4 Filter clogged TBD
L5 Circulating water temperature sensor error TBD
L6 System capacity insufficient TBD
L7 Water pressure switch protection TBD
Lc Starting failure Heating LED-Off 3S, Blinks 11 times
Ld Power phase loss/lack TBD
LE Compressor locked Running LED-Off 3S, Blinks 22 times
LF Compressor over-speed protection TBD
LH Indoor ambient temperature too high TBD
LL Indoor ambient temperature too low TBD
LP Indoor-Outdoor units don’t match or power line connection error Running LED-Off 3S, Blinks 19 times
P0 Driving module resumed TBD
P5 Driving board checking-compressor current too high Heating LED-Off 3S, Blinks 15 times
P6 Driving board checking-communication error with indoor board Heating LED-Off 3S, Blinks 16 times
P7 Radiator loose, or IPM /PFC board sensor abnormal /error Heating LED-Off 3S, Blinks 18 times
P8 Radiator loose, or IPM /PFC board too hot Heating LED-Off 3S, Blinks 19 times
P9 AC contactor protection TBD
PA AC current protection (incoming) TBD
Pc Current checking-circuit error or current sensor error TBD
Pd Current checking-connection error (U-V-W not connected accordingly) TBD
PE Temperature sensor drifting protection TBD
PF Driving board-ambient temperature sensor error TBD
PH DC incoming voltage too high (program checking) Cooling LED-Off 3S, Blinks 11 times
PL DC incoming voltage too low (program checking) Cooling LED-Off 3S, Blinks 21 times
PP AC incoming power abnormal (too low or too high) TBD
PU Capacitor-charging circuit error Heating LED-Off 3S, Blinks 17 times
U7 4-way switch valve abnormal Heating LED-Off 3S, Blinks 20 times
U6 Oil temperature too high Heating LED-Off 3S, Blinks 16 times
U4 Compressor rotation reversed Heating LED-Off 3S, Blinks 14 times
U5 Rectifying current checking error Heating LED-Off 3S, Blinks 13 times
U3 DC main bus voltage drop Heating LED-Off 3S, Blinks 20 times
U1 Compressor phase current checking circuit error Heating LED-Off 3S, Blinks 13 times
U2 Compressor phase loss protection Heating LED-Off 3S, Blinks 12 times
UC Filter needs to be cleaned TBD
U8 PG motor (indoor) checking circuit error Running LED-Off 3S, Blinks 17 times
U9 Outdoor fan motor checking circuit error Running LED-Off 3S, Blinks 18 times
UF De-actuate remote or control, from a long distance TBD
C7 PTC heater sensor error Heating LED-Off 3S, Blinks 9 times
FJ Discharge/vent air temperature sensor error TBD
L8 Storage tank water level switch error TBD
d3 AC condensate: anti-freezing sensor error TBD
d4 Domestic water: anti-freezing sensor error TBD
d5 Return water sensor error TBD
d6 Defrost coil sensor error TBD
d7 Back-up hot water temperature sensor error TBD
d8 Hot water outlet temperature sensor error TBD
d9 Hot water inlet temperature sensor error TBD
db Temp. Sensor Error-after metering device (cap. Tube, or EXV) TBD
dc Temp. Sensor Error-suction tube TBD
dP Temp. Sensor Error-discharge tube TBD
dL Low voltage reluctance/reluctor error TBD
L9 Compressor Protection-calculated input is too high Running LED-Off 3S, Blinks 20 times
dF Temp. Sensor Error-solar water heater-water outlet TBD
dH Temp. Sensor Error-solar water heater-assistant ele. heater TBD
dU Door-lock sensor: card is not in TBD
dJ AC phase protection (lost or reversed) TBD
d0 Fan motor speed communication error TBD
Eo Specia function board error TBD
dn Mulitiple zone-pipe connection doesn’t match with comm. wire connection TBD
Cn Not for AC: Buring gas density too high Cooling LED-Off 3S, Blinks 23 times
Fn Not for AC: Buring gas sensor error Running LED-Off 3S, Blinks 21 times
HP Solar AC: solar power input voltage is higher than 180V TBD
dA AHU or RT: discharge air-relative humidity sensor error TBD
dE AHU or RT: fresh air-relative humidity sensor error TBD
Fr AHU or RT: fresh air-temp. sensor error TBD
UA DC inverter driving error 1 TBD
dr AHU or RT: air flow pressure sensor error TBD
Ub DC inverter driving error 2 TBD
Ud DC inverter driving error 3 TBD
UE DC inverter driving error 4 TBD
LU Compressor power input limit / decrease HZ (system power input) Cooling LED-Off 3S, Blinks 24 times
LA Outdoor unit fan motor protection (not rotating, or not connected). If 2 motors, motor 1-L3, motor 2-LA Running LED-Off 3S, Blinks 24 times
A5 Condensing coil-inlet temp. sensor error (=F5 in commercial units) TBD
A7 Condensing coil-outlet temp. sensor error (=F7 in commercial units) TBD
e4 Compressor dischage temp. (=pressure) too high TBD
e8 Over-load protection (outdoor coil temp. too high) TBD
e1 Dicharge pressure sensor error TBD
ee DC inverter driving chip error TBD
JF Indoor unit-testing board comm. Error (after 3-minutes) TBD
rF RF module error (once powered, the MCU tries to send commands, via SPI, to RF, if RF doesn’t receives it, error shows) TBD
Uu Solar AC: battery bank discharged too much and the output voltage is lower than 295V TBD
no For VRF groups: DC unit’s display board can not receive any data from the fixed speed comp. unit, will show “no” after 8 seconds TBD
E6+IDU Temp. Communication error (ID display-OD main board) and outdoor temperature sensor error TBD
E7+ODU Temp. Communication error (ID unit-OD unit) and outdoor temperature sensor error TBD
Fu AHU or RT: dust sensor error TBD
e2 Warning: water flow low TBD
e3 Oil level low protection TBD
e7 System pressure difference protection TBD
eA Heat exchanger-pressure transducer sensor error (similar to lower pressure transducer protection) TBD
eC Oil-pressure transducer sensor error (similar to lower pressure transducer protection) TBD
e0 Economizer-discharge temp. sensor error TBD
e9 Economizer-discharge pressure sensor error TBD
eF Compressor brand sensor error TBD
bH Water pump temp. sensor TBD
oE Any other error that the outdoor unit needs to stop TBD
E8 Anti-high temperature protection Running LED-Off 3S, Blinks 8 times
E9 Anti-cold blowing (discharging) protection Running LED-Off 3S, Blinks 9 times
F1 Indoor air temp. sensor error/bad-broken, shorted… Cooling LED-Off 3S, Blinks 1 time
F2 Indoor coil temp. sensor error/bad-broken, shorted… Cooling LED-Off 3S, Blinks 2 times
F4 Outdoor coil temp. sensor error/bad-broken, shorted… Cooling LED-Off 3S, Blinks 4 times
F5 Compressor discharge temp. sensor error/bad-broken, shorted… Cooling LED-Off 3S, Blinks 5 times
F7 Cooling-oil return error Cooling LED-Off 3S, Blinks 7 times
FC Slide door error, or air louver mechanism error TBD
FE Over-load sensor error TBD
H8 Water level-high /overflow protection Heating LED-Off 3S, Blinks 8 times
H9 Ele. heater error Heating LED-Off 3S, Blinks 9 times
b7 Outlet temp. sensor error Cooling LED-Off 3S, Blinks 22 times
b5 Inlet temp. sensor error Cooling LED-Off 3S, Blinks 19 times
d1 DRM running mode 1  
d2 DRM running mode 2  
d3 DRM running mode 3