Air-to-water Heat Pump
57
MONOBLOC
TYPE
Code Indication Error Name Source of Error Signal Control Description
FE
The rst sanitary water
tank temperature sensor
error
①
The plug on temperature
sensor is not correctly
connected to the socket
on mainboard.
②
The resistance of
temperature sensor
is not correct.
It will be automatically
cleared after the failure is
removed.
F3
Gas pipe temperature
sensor inside refrigerant
error
①
The plug on temperature
sensor is not correctly
connected to the socket
on mainboard.
②
The resistance of
temperature sensor
is not correct.
It will be automatically
cleared after the failure is
removed.
F0
Remote room temperature
sensor error
①
The plug on temperature
sensor is not correctly
connected to the socket
on mainboard.
②
The resistance of
temperature sensor
is not correct.
It will be automatically
cleared after the failure is
removed.
Ec Water switch error
①
The switch is damaged.
②
The wire of the
switch is loose.
③
The position of the
switch is wrong
It will be cleared after the
unit is turned o.
E2
Indoor anti-frozen
protetion
①
The resistance of
temperature sensor
is not correct.
②
The electronic
expansion valve can
not work normally.
It will be cleared once
malfunction is removed or it
will be shown all the time; but
it will be cleared immediately
when switching operation
mode.
Ed
outlet temperature High-
temp protection
①
The resistance of
temperature sensor
is not correct.
②
The plug on temperature
sensor is not correctly
connected to the socket
on mainboard.
③
Mainboard of outdoor
unit is damaged.
De-energize the unit and
then, energize it again. If the
malfunction is removed, the
code will be cleared.
EH
the rst internal electric
heater connection
Malfunction
①
The AC contactor
is damaged.
De-energize the unit and
then, energize it again. If the
malfunction is removed, the
code will be cleared.
EH
second internal electric
heater connection
Malfunction
①
The AC contactor
is damaged.
De-energize the unit and
then, energize it again. If the
malfunction is removed, the
code will be cleared.
EH
sanitary water tank
electric heater connection
Malfunction
①
The AC contactor
is damaged.
De-energize the unit and
then, energize it again. If the
malfunction is removed, the
code will be cleared.
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