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Fusion-i Series Manual
Page 15
7. Troubleshooting
7.1 Electronic Control Fault Table
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
Coil1 Temp. Sensor Fault
P05
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
High Pressure Prot.
E01
Sudden drop in water flow/poor water flow/
Failed High pressure switch
Turn heater on and off at power source (first
ensure good water flow). Check the pressure
switch (Technician required)
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
Anti-freezing Prot.
E07
Water flow is not enough
Check the pipe water flow and whether water
system is jammed or not
Primary Anti-freezing Prot.
E19
The ambient temp. Is low
Secondary Anti-freezing Prot.
E29
The ambient temp. Is 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
Low temperature protection
Non
The environment temp. is low
Comp. Overcurrent Prot.
E051
The compressor is overload
Check whether the system of the compressor
running normally
Exhaust Air over Temp Prot.
P082
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
Antifreeze Temp. Sensor Fault
P09
Antifreeze temp sensor is broken or short
circuited
Check and replace this temp sensor
Waterway Anti-freezing Prot.
E05
Water temp. or 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
Pressure sensor Fault
PP
The pressure Sensor is broken
Check or change the pressure sensor or pressure
Fan Motor1 Fault
F031
1. Motor is in locked-rotor state
2. The wire connection between DC-fan
motor module and fan motor is in bad
contact
1. Change a new fan motor
2. Check the wire connection and make sure they
are in good contact
Low AT Protection
TP
Ambient temp is too low
Fan Motor2 Fault
F032
1. Motor is in locked-rotor state
2. The wire connection between DC-fan
motor module and fan motor is in bad
contact
1. Change a new fan motor
2. Check the wire connection and make sure they
are in good contact.
Communication Fault (speed
control module)
E081
Speed control module and main board
communication fail
Check the communication connection
Coil2 Temp. Sensor Fault
P15
The temp. sensor is broken or short circuit
Check or change the temp. sensor
