O2N Customer's indoor unit communication watchdog timeout
P013 Heating Returning Water Temp. Sensor Fault
P023 Heating Leaving Water Temp. Sensor Fault
E11  HP Fault
TC No Cooling at Low AT Protection
E12  LP Fault
E030 Insufficient Defrosting Water Flow Alarm
E032  Flow Switch Fault
E04  Electric Heater Overheat Fault
E19  Primary Anti-freezing Fault
E29  Secondary Anti-freezing Fault
E171 Anti-freezing Fault
E035 Low Water Flow Protection
P42  Room Temp. Sensor Fault
O2P Customer's indoor unit defrost command wait timeout
P182 Overhigh Exhaust Temp.
E08k Gateway and inverter Communication Fault
E08m Gateway networking fault
E06 Excess Temp. Diff. between Inlet & Outlet
E065  Overhigh Outlet Water Temp.
P02a Mix Tube Outlet Water Temp. Sensor Fault
P018  DHW Returning Water Temp. Sensor Fault
P028  DHW Leaving Water Temp. Sensor Fault
P105 Zone 1 Room Temp. Sensor Fault
P106 Zone 2 Room Temp. Sensor Fault
P107 Zone 2 Mixing Temp. Sensor Fault
E08g Zone 1 Thermostat Communication Fault
E08h Zone 2 Thermostat Communication Fault
E122 Abnormal Adjustment of Mixing Valve
E11   HP Fault 3+
E12  LP Fault 3+
E032  Flow Switch Fault 3+
E04  Electric Heater Overheat Fault 3+
E035 Low Water Flow Protection 3+
E171  Anti-freezing Fault 3+
P182  Overhigh Exhaust Temp. 3+
E06 Excess Temp. Diff. between Inlet & Outlet 3+
E071 Low Outlet Water Temp. Fault 3+
E065  Overhigh Outlet Water Temp. 3+
T5S Cooling not allowed due to big temp. diff. between indoor&outdoor temp. 
T5T Temp. & Humidity Sensor Fault
T5Z External Ambient Temp. Sensor Fault
P01  Inlet Water Temp. Sensor Fault
P02  Outlet Water Temp. Sensor Fault
P153  Coil Temp. Sensor Fault
P04  AT Sensor Fault
P17  Suction Temp. Sensor Fault
P191 Anti-freezing Temp. Sensor Fault
P152 Distributor Tube Temp. Sensor Fault
P03a Buffer Tank Temp. Sensor Fault
P101  EVI Inlet Sensor Fault
P102  EVI Outlet Sensor Fault
P181  Exhaust Temp. Sensor Fault
PP12 High Pressure Sensor Fault
PP11 Pressure Sensor Fault
TP  Low AT Fault
E071 Low Outlet Water Temp. Fault
E042 DHW Electric Heater Overheat Fault
E07a Overhigh Outlet Water Temp. after Electric Heater
E08i Communication Fault with Indoor Unit
E08j Communication Fault with Consumption Module
E047 Water Circuit Electrical Heater Dry Burning Alert (for IDU)
E034 Water Pressure Sensor Fault(for IDU)
P03  DHW Tank Sensor Fault
F031  Fan Motor 1 Fault
F032  Fan Motor 2 Fault
E081  Fan Motor 1 and PCB Communication Fault
E08c Communication Fault with Hydraulic Module
E082  Fan Motor 2 and PCB Communication Fault
F00  IPM Overcurrent Fault
F01  Comp. Driver Fault
E051  Comp. Overcurrent Fault
F15  Input Power Lacking Phase Fault
F18  IPM Current Sampling Fault
F26  IGBT Overheat Fault
F03  Pre-Charge Failure
F05  DC Power Bus Overvoltage Fault
F06  DC Power Bus Undervoltage Fault
F07  AC Power Undervoltage Fault
F08  AC Power Overcurrent Fault
F09  Input Power Voltage Sampling Fault
F12  DSP and PFC Communication Fault
F17  Comp. Driver Temp. Sensor Fault
F11  DSP and Comp. Driver Communication Fault
F151  Comp. Driver and PCB Communication Fault
F13  IPM Overheat Fault
F14 Compressor Lacking Phase Fault
F25  Input Power Current Sampling Fault
F29 EEPROM Fault
F10 AC Power Overvoltage Fault
F060 Compressor Type Code Fault
F21 Overspeed Fault
F33  Comp. Current Frequency Decrease Alarm
F16  Comp. Weak Magnetic Alarm
F20  IGBT Power Device Overheat Alarm
F22  AC Input Current Frequency Decrease Alarm
F23  EEPROM Alarm
F24  Destroyed EEPROM & No Activated Fault
F120 Driver (Fan) Temp. Sensor Fault
F106 Driver (Fan) IPM Overheat Fault
F105 Driver(Fan) IPM Overcurrent Fault
F101 Driver (Fan) Power Lacking Phase Fault
F112 Driver (Fan) Current Sampling Fault
F102 Driver (Fan) Start Fault
F113 Driver(Fan) Software Overcurrent Fault
F109 Driver (Fan) Internal Overspeed Fault
E08  Communication Fault
E084 Display and PCB Communication Fault
