LED code = DF, E2, E3, E4, E5, E6, E7, E8
CHIGO DC Inverter Split Air-Condition Unit Fault Code
The indoor unit faulty display
Faulty contents = Faulty contents
Trouble Display = The running lamp lightens all the time,the turbo lamp lightens 2 times ,and then extinguish 2 seconds.
Faulty contents = Indoor fan fault
Trouble Display = The running lamp lightens all the time, the turbo lamp lightens 5 times, and then extinguish 2 seconds.
Faulty contents = Indoor temp. sensor fault
Trouble Display = The running lamp lightens all the time,the turbo lamp lightens 3 times, and then extinguish 2 seconds.
Faulty contents = Indoor coil outlet temp. sensor fault
Trouble Display = The running lamp lightens all the time, the turbo lamp lightens 4 times, and then extinguish 2 seconds.
Faulty contents = Indoor coil inlet temp. sensor fault
Trouble Display = The running lamp lightens all the time, the turbo lamp lightens 4 times, and then extinguish 2 seconds.
Faulty contents = Indoor coil middle temp. sensor fault
Trouble Display = The running lamp lightens all the time, the turbo lamp lightens 4 times, and then extinguish 2 seconds.
Faulty contents = Mode conflict
Trouble Display = The running lamp lightens 1 time, and then extinguish 1 second.
Faulty contents = Defrosting or anti cold air
Trouble Display = The timing lamp lightens 1 time ,and then extinguish 1 second.
The outdoor unit faulty display
Faulty contents = the outdoor unit transducer module protection faulty
Trouble Display = The timing lamp lightens all the time, the turbo lamp lightens 2 times, and then extinguish 2 seconds.
Faulty contents = over current of outdoor unit
Trouble Display = The timing lamp lightens all the time, the turbo lamp lightens 3 times, and then extinguish 2 seconds.
Faulty contents = discharge temp. of compressor too high, outside ambient temp. too high, switch temp. of compressor crust cut off, temp. of module too high
Trouble Display = The timing lamp lightens all the time, the turbo lamp lightens 4 times, and then extinguish 2 seconds.
Faulty contents = The outdoor unit DC busbar voltage is abnormal
Trouble Display = The timing lamp lightens all the time, the turbo lamp lightens 7 times, and then extinguish 2 seconds.
Faulty contents = lack refrigerant or reverse valve fault
Trouble Display = The timing lamp lightens all the time, the turbo lamp lightens 8 times, and then extinguish 2 seconds.
Faulty contents = outdoor sensor fault
Trouble Display = The running lamp lightens all the time, the turbo lamp lightens 7 times, and then extinguish 2 seconds.
Faulty contents = outdoor unit drive fault, start compressor failure
Trouble Display = The running lamp lightens all the time, the turbo lamp lightens 6 times, and then extinguish 2 seconds.
Faulty contents = Communication fault
Trouble Display = The timing lamp lightens all the time, the sleeping lamp lightens 2 times, and then extinguish 2 seconds
Faulty contents = Indoor fan fault
Trouble Display = The timing lamp lightens all the time, the sleeping lamp lightens 5 times , and then extinguish 2 seconds
Faulty contents = Indoor temp. sensor fault
Trouble Display = The timing lamp lightens all the time, the sleeping lamp lightens 3 times , and then extinguish 2 seconds
Faulty contents = Indoor coil outlet temp. sensor fault
Trouble Display = The timing lamp lightens all the time, the sleeping lamp lightens 4 times , and then extinguish 2 seconds
Faulty contents = Indoor coil inlet temp. sensor fault
Trouble Display = The timing lamp lightens all the time, the sleeping lamp lightens 4 times ,and then extinguish 2 seconds
Faulty contents = Indoor coil middle temp. sensor fault
Trouble Display = The timing lamp lightens all the time, the sleeping lamp lightens 4 times , and then extinguish 2 seconds
Faulty contents = Mode conflict
Trouble Display = The timing lamp lightens 1 time, and then extinguish 1 second.
Faulty contents = Defrosting or anti cold air
Trouble Display = The running lamp lightens 1 time, and then extinguish 1 second
Faulty contents = the outdoor unit transducer module protection faulty
Trouble Display = The running lamp lightens all the time, the sleeping lamp lightens 2 times, and then extinguish 2 seconds
Faulty contents = over current of outdoor unit
Trouble Display = The running lamp lightens all the time, the sleeping lamp lightens 3 times , and then extinguish 2 seconds
Faulty contents = discharge temp. of compressor too high, outside ambient temp. too high, switch temp. of compressor crust cut off, temp. of module too high
Trouble Display = The running lamp lightens all the time, the sleeping lamp lightens 4 times, and then extinguish 2 seconds
Faulty contents = The outdoor unit DC busbar voltage is abnormal
Trouble Display = The running lamp lightens all the time, the sleeping lamp lightens 7 times, and then extinguish 2 seconds
Faulty contents = lack refrigerant or reverse valve fault
Trouble Display = The running lamp lightens all the time, the sleeping lamp lightens 8 times, and then extinguish 2 seconds
Faulty contents = outdoor sensor fault
Trouble Display = The timing lamp lightens all the time, the sleeping lamp lightens 7 times, and then extinguish 2 seconds
Faulty contents = outdoor unit drive fault, start compressor failure
Trouble Display = The timing lamp lightens all the time, the sleeping lamp lightens 6 times, and then extinguish 2 seconds
The malfunction indoor and outdoor unit
The common malfunction code analysis and solutions
The fault code = F1
The fault content = The communication fault
The reason of fault and its solutions = 1.The communication wire is broken off. Please check whether the wire is disentwined ;
2.Please check whether the electrical control board is damaged. It should be replaced when it is damaged;
3.Please check whether the power ground wire is reliable;
4.Please check whether the unit is abnormal caused by the external interference. If it is, then find the interfering sources, and remove them.
The fault code = F2
The fault content = The indoor temperature sensor fault
The reason of fault and its solutions = 1.Check whether the resistance of sensor is normal, otherwise replace it;
2.Check whether the sensor wire is short circuit or open circuit, and whether the plug is well contacted, whether there is welding off or rosin joint on the electric control board, repair it if there is any above;
3.When the 1 and 2 are both normal, then the component or integrated circuit is damaged, the electric control board should be replaced.
The fault code = F3
The fault content = The indoor coil temperature sensor fault
The reason of fault and its solutions = 1. Check whether the resistance of sensor is normal, otherwise replace it;
2. Check whether the sensor wire is short circuit or open circuit, and whether the plug is well contacted, whether there is welding off or rosin joint on the electric control board ,repair it if there is any above;
3. When the 1 and 2 are both normal, then the component or integrated circuit is damaged, the electric control board should be replaced.
The fault code = F4
The fault content = Indoor PG motor fault (tap motor hasn’t so breakdown )
The reason of fault and its solutions = 1.Check whether the contact of the plug of the motor wire and socket is well. Please make sure it is well contacted;
2.Check whether the indoor motor has damaged, the motor should be replaced when it is damaged;
3 .Check whether the controllable silicon and other components on the electric control board have damaged,
replace the controllable silicon or electric control board when they are damaged;
4.Check whether the indoor fan is unobstructed when running, please fix the indoor fan again when it is obstructed.
The fault code = F5
The fault content = IPM protection
The reason of fault and its solutions = 1.Check whether the supply voltage is out of ranging from 150 to 270V(overvoltage and undervoltage protection); Measuring the actual current, if the current is greater than
the rated current of 2A,it is over-temperature protection; If the above are normal, that is IPM module internal circuit fault protection, so please replace the IPM module.
The fault code = F6
The fault content = The outdoor sensor fault
The reason of fault and its solutions = 1. Check whether the resistance of sensor is normal, otherwise replace it;
2. Check whether the sensor wire is short circuit or open circuit, and whether the plug is well contacted, whether there is welding off or rosin joint on the electric control board, repair it if there is any above;
3. When the 1 and 2 are both normal ,then the component or integrated circuit is damaged, the electric control board should be replaced.
The fault code = F7
The fault content = The outdoor coil temperature sensor fault (Including the mid-point of tube. inspiratory gas)
The reason of fault and its solutions = 1. Check whether the resistance of sensor is normal, otherwise replace it;
2.Check whether the sensor wire is short circuit or open circuit, and whether the plug is well contacted, whether there is welding off or rosin joint on the electric control board, repair it if there is any above;
3.When the 1 and 2 are both normal, then the component or integrated circuit is damaged, the electric control board should be replaced
The fault code = F9
The fault content = Exhaust gas sensor failure
The reason of fault and its solutions = 1. Check whether the resistance of sensor is normal, otherwise replace it;
2. Check whether the sensor wire is short circuit or open circuit, and whether the plug is well contacted, whether there is welding off or rosin joint on the electric control board, repair it if there is any above;
3. When the 1 and 2 are both normal, then the component or integrated circuit is damaged, the electric control board should be replaced.
The fault code = FA
The fault content = The communication fault between the wire controller and the indoor PCB
The reason of fault and its solutions = 1. check whether the wire controller’s connecting wire is short circuit or loose, please make it connect well;
2. Check the connecting line.wire controller.PCB whether they are loose or have a bad contact. Please make them have a good contact.
The fault code = FC
The fault content = outdoor unit driving fault, starting compressor failure
The reason of fault and its solutions = 1. Turn on the power again, and then check whether the operation of the compressor is normal;
2. Check whether the connection of the compressor is correct or reliable, otherwise repair it;
3. Check whether the components on the electric control board have been damaged, if they are damaged, the components or the electric control board should be replaced.;
4. Check whether the connecting wires are disentwined between the Intelligent Power Module board and the main board, otherwise make the wires connect firmly .
The fault code = FF
The fault content = The outdoor DC motor fault
The reason of fault and its solutions = 1. Check the resistance value of the DC motor port. If it is short circuit, please change the DC motor;
2. Check the voltage value of the DC motor port VCC(15Vdc), Vdm(340Vdc),please change the PCB board if the voltage values are abnormal;
3. if all the voltage values of the DC motor port are normal，the Vsp voltage (0~5v) is also ok ,it shows that the inner PCB board of the DC motor is damaged, then change the DC motor.
The fault code = FH
The fault content = The indoor unit EEPROM error
The reason of fault and its solutions = 1. Check whether there are false weld and bad contact etc between the EEPROM chip block and the electronic control board ;
2. Check whether the EEPROM chip pin is broken foot and the direction of installation is in line with the
EEPROM block;
3. When the procedure of EEPROM chip and itself have fault it will appear the code FH. That is the need to replace the EEPROM chip.
The fault code = dF
The fault content = The indoor unit EEPROM error
The reason of fault and its solutions = 1. Check whether there are false weld and bad contact etc
between the EEPROM chip block and the electronic control board ;
2. Check whether the EEPROM chip pin is broken foot and the direction of installation is in line with the EEPROM block;
3. When the procedure of EEPROM chip and itself have fault it will appear the code FH. That is the need to replace the EEPROM chip.
The fault code = dI
The fault content = Mode conflict
The reason of fault and its solutions = When the running mode for No.1 indoor unit is different from No.2 indoor unit, the dF is displayed.
The fault code = P1
The fault content = Indoor coil temperature
over-temperature protection for heating (thermal overload), outdoor coil temperature overheating protection for cooling (cooling overload)
The reason of fault and its solutions = 1. Check whether the ambient temperature is over the range of air-conditioning running temperature ;
2. Check whether the indoor coil temperature is higher than or equal to 63 degrees when heating and check whether the outdoor coil temperature is higher than or equal to 65 degrees when cooling, it will appear protection if the value is over the above;
3. Check whether the parameters of indoor and outdoor coil temperature sensors are normal, if abnormal, please replace the sensors;
4. If the above are normal, check whether the main control board output parameters are normal, if abnormal, please replace the main control board.
The fault code = P2
The fault content = The outdoor unit inverter module protection fault
The reason of fault and its solutions = 1. Check whether the connection of the compressor is reliable, otherwise connect firmly again;
2. Check whether the fixation between the IPM module and the radiator is firm.;
3. Check whether the compressor is well, otherwise replace it;
4. Check whether the IPM module is abnormal, otherwise replace it.
The fault code = P3
The fault content = Over current of outdoor unit
The reason of fault and its solutions = 1. Check whether the ambient temperature exceeds the operation range for the air conditioner;
2. Check whether the current detection circuit is abnormal, the electric control should be replaced when it is abnormal.
The fault code = P4
The fault content = discharge temperature of compressor is too high, the outside ambient temperature over-temperature, switch off the compressor shell temperature, module temperature over-temperature
The reason of fault and its solutions = 1. Check whether the pressure is normal when the unit is running, if it is abnormal, you should detect the leakage and then welding and adding refrigerant;
2. Check whether the ambient temperature is too high or too low, when the temperature is more than -20 degrees and less 55 degrees, it can disappear automatically;
3. Check whether temperature switch of compressor is damage, it should be replaced if it is damaged.
The fault code = P7
The fault content = The outdoor unit DC generatrix voltage is abnormal
The reason of fault and its solutions = 1. Check whether the supply voltage is out of ranging from 150 to 270V;
2. Check the voltage detection circuit of the IPM base board is abnormal, if it is abnormal, the IPM base board or the electric control board should be replaced.
The fault code = P8
The fault content = lack refrigerant or reverse valve fault
The reason of fault and its solutions = 1. Check whether the high and low pressure valves have been opened, otherwise open the valves;
2. Check whether the indoor coil pipe temperature sensor is normal, if it is abnormal, the sensor should be replaced;
3. Check whether the indoor coil temperature sensor hung in the air, please plug it in a correct position if the indoor coil temperature sensor hung in the air;
4. Check the system pressure is abnormal, if it is abnormal, you should detect leakage and the welding and adding the refrigerant.;
5. Please change the outdoor PCB board , if all above are normal.
The fault code = PA
The fault content = protection when indoor pipe temperature is too low (Anti-icing)
The reason of fault and its solutions = 1. Check whether the ambient temperature is over the range of air-conditioning running temperature;
2. Check the indoor coil temperature is less than or equal to -1 degrees, if more than this value it will be the protection of;
3. Check whether the indoor coil temperature sensor parameters are normal, if abnormal it is the replacement of the sensor;
4. If the above are normal, check whether the main control board output parameters are normal, if abnormal ,please replace the main control board.
The fault code = PC
The fault content = Outdoor ambient temperature over-temperature protection (including high and low)
The reason of fault and its solutions = 1. Check whether the outdoor ambient temperature is too high or too low, when the ambient temperature is lower than (T> -20, T <55), this fault automatically discharges;
2. Check whether the outdoor temperature sensor’s ring temperature parameters are normal, if abnormal ,please replace the sensor;
3. If the above are normal, check whether the main control board’s output parameters are normal, f abnormal ,please replace the main control board.
The fault code = PE
The fault content = EEPROM reading error (outdoor unit)
The reason of fault and its solutions = 1. Check whether there are false weld and bad contact etc between the EEPROM chip block and the electronic control board ;
2. Check whether the EEPROM chip pin is broken foot and the direction of installation is in line with the EEPROM block;
3. When the procedure of EEPROM chip and itself have fault it will appear the code PE. At this time there is the need to replace the EEPROM chip.
