Malfunction
Overheating in heating mode
Gas exhaust temperature sensor
failure
Controller failure
Converter failure
Communication failure
between controller and
converter board
Communication failure
between converter and outdoor
board
module board failure between
outdoor board and module
board
Module board failure
Direct main current's voltage
too high or too low protection
Over current protection
IPM module temperature
sensing circuit output
failure
IPM module temperature
too high protection
8
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Error code
EE04
Low or No water flow
EE05
Defrosting is not good
Lack of gas
The throttling device is
jammed
Low water flow
EE06
Wire connection is not good
Controller failure
EE07
Converter board failure
EE08
Wire connection is not good
Controller failure
EE09
Wire
communication
outdoor board is wrong
Outdoor board failure
EE10
Communication wire is broken
Outdoor
board failure
EE11
The data is wrong or the
module board is broken
EE12
The pressure is too high or too
low
The
contactor is broken
EE13
Electric supply pressure is too
low, the heat pump is overload
IPM module temperature
EE14
sensor output is abnormal
EE15
- 77 -
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Reason
connection
between
wire
and
board
or
module
inner
communication
Solution
Failure of water pump
Water pipe jammed
Failure of water flow switch
Defrosting by hand
Plus, the gas
Change the throttling device
Check the water pump
Check or change the signal
wire
Restart the power supply or
change the controller
Restart the power supply or
change the converter board
Check or change the wire
connection
Restart the power supply or
change the controller
Rewiring
Restart the power supply or
change the outdoor board
Restart the power supply or
change the broken board
Restart the power supply or
change the broken board
Check the power supply
Change the contactor
Check the power supply
Check the water temperature
whether it is too high
Check the PC board or
replace the new one
Check the PC board or
replace the new one