Code Possible Cause Solution
E1 Short of indoor temperature sensor Open of Indoor temperature sensor Check of departure of indoor temperature sensor Check of PCB open/short
E5 Short of indoor heat exchanger sensor Open of indoor heat exchanger sensor Check of indoor exchanger sensor departure Check of PCB open/short Replacement of sensor
E6 Short of outdoor heat exchanger sensor Open of outdoor heat exchanger sensor Check of outdoor exchanger sensor departure Check of PCB open/short Replacement of sensor
E7 Short of heater temperature sensor Open of heater temperature sensor Check of heater wiring diagram Check of sensor attachment location
EL When the electrical heater is overheated Check of heater temperature sensor departure Check of PCB open/shore Replacement of sensor
Code Possible Cause Solution
* 1 Indoor unit thermistor sensor error Indoor unit thermistor sensor PCB of the Indoor unit
* 5 Indoor unit pipe thermistor sensor error Indoor unit pipe thermistor sensor PCB of the indoor unit
* 6 Outdoor unit thermistor sensor error Outdoor unit thermistor sensor PCB of the outdoor unit
* 9 Float switch error Drain pump, Float switch Drain system DIP switch (SW2) of the indoor unit (The No.2 and No.4 switches must be at “ON” position.)
* A A Indoor and Outdoor communication error Communication cables of indoor and outdoor units PCB of indoor and outdoor units
*C Wired remote controller communication error Wired remote controller cables, Wired remote controller Main/Sub PCB of the indoor unit
* D Outdoor pipe thermistor sensor error Outdoor pipe thermistor sensor PCB of the outdoor unit
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