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Malfunction cause
Malfunction
code
Safeguard
Enter condition
Resume condition
Water flow switch is not
installed correctly (the
wrong direction, flow
switches, valve selection
error)
To re-install the flow
switch
Water flow is too small
Check water-way valve is
fully open, or change the
water pump to increase
flow
Antifreeze switch
protection in
cooling
E1
:
03
the unit stopped
In winter the ambient
temperature is too low and
the unit does not turn the
situation into the freezing
state.
Unit will enter the normal
freezing process
Water flow is too small
Check water-way valve is
fully open, or change the
water pump to increase
flow
Outlet water
super-cooling
in cooling mode
E1
:
04
the unit stopped
Outlet water temperature is
lower than
〖
C2
〗
Resetting Parameters
Water flow is too small
Check water-way valve is
fully open, or change the
water pump to increase
flow
Outlet water
super-heating
in heating mode
E1
:
05
the unit stopped
Outlet water temperature is
higher than
〖
C3
〗
Resetting Parameters
Water flow is too small
Check water-way valve is
fully open, or change the
water pump to increase
flow
Difference in
water temp. is too
high to protect in
cooling mode
E1
:
06
the unit stopped
Difference in water temp.
is higher than
〖
C4
〗
(sets)
in cooling mode
Resetting Parameters
Difference in
water temp. is too
high to protect in
heating mode
E1
:
07
the unit stopped
Water flow is too small
Check water-way valve is
fully open, or change the
water pump to increase
flow