
19
Protect/fault Fault
display
Reason Elimination methods
Inlet Temp. Sensor Fault
P01
The temp. Sensor is broken or
short circuit
Check or change the temp. Sensor
Outlet Temp. Sensor Fault P02 The temp. Sensor is broken or
short circuit Check or change the temp. Sensor
Ambient Temp. Sensor Fault P04 The temp. Sensor is broken or
short circuit Check or change the temp. Sensor
Coil 1 Temp. Sensor Fault P05 The temp. Sensor is broken or
short circuit Check or change the temp. Sensor
Coil 2 Temp. Sensor Fault P15 The temp. Sensor is broken or
short circuit Check or change the temp. Sensor
Suction Temp. Sensor Fault P07 The temp. Sensor is broken or
short circuit Check or change the temp. Sensor
Discharge Temp.
Sensor Fault P081 The temp. Sensor is broken or
short circuit Check or change the temp. Sensor
Exhaust Air over Temp Prot. P082 The compressor is overload Check whether the system of the compressor running normally
Antifreeze Temp. Sensor
Fault
P09 Antifreeze temp sensor is broken or short
circuited
Check and replace this temp sensor
Pressure sensor Fault PP The pressure Sensor is broken Check or change the or pressure
sensor
High Pressure Prot. E01 The high-pressure switch is broken Check the pressure switch and cold circuit
Low Pressure Prot. E02 Low pressure1 protection Check the pressure switch and cold circuit
Flow Switch Prot. E03 No water/little water in water
system Check the pipe water flow and water pump
Waterway Anti-freezing Prot. E05 Water temp. or ambient temp. is too
low
Inlet and outlet temp. too big E06 Water flow is not enough and
low differential pressure Check the pipe water flow and whether water system is jammed or not
Anti-freezing Prot. E07 Water flow is not enough Check the pipe water flow and whether water system is jammed or not
Winter Primary Anti-Freeze
Protection. E19 The ambient temp. Is low in winter
Winter Secondary
Anti-freezing Prot. E29
The ambient temp. Is low in winter
Comp. Overcurrent Prot. E051 The compressor is overload Check whether the system of the compressor running normally
Communication Fault E08 Communication failure between wire
controller and mainboard
Check the wire connection between remote
wire controller and main board
Communication Fault
(speed control module) E081 Speed control module and main
board communication failure Check the communication connection
Low AT Protection TP Ambient temp is too low
EC fan feedback Fault F051 There is something wrong with fan
motor and fan motor stops running
Check whether fan motor is broken or locked or not
Fan Motor 1 Fault
F031
wire connection between DC- fan motor
module and fan motor are in bad contact
Change a new fan motor.
Check the wire connection and make sure they are in good contact