Midea MHC-V10W/D2N1, Installation & Owner'S Manual, Page: 56 / 96

54
Error code
Malfunction or
protection Failure cause and Corrective
action
1. The EEprom parameter is
error, rewrite the EEprom
data.
2. EEprom chip part is
broken, change a new
EEprom chip part.
3. Main PCB is broken,
change a new PCB.
H6 displayed 10
times in 2 hours
Refer to
1. System is lack of
refrigerant volume. Charge
the refrigerant in right
volume.
2.When at heating mode or
heat water mode, Heat
exchanger is dirty or
something is block on the
surface. Clean the heat
exchanger or remove the
obstruction.
3. The water flow is low in
cooling mode.
is loosen.
Tap-tap the valve body and
plug in/ plug off the
connector for several times
to make sure the valve is
working correctly. And
install the winding in the
right location
Heating mode, DHW mode:
1. The water flow is low;
water temp is high, whether
there is air in the water
system. Release the air.
2. Water pressure is lower
than 0.1Mpa, charge the
water to let the pressure in
the range of 0.15~0.2Mpa.
3. Over charge the
refrigerant volume.
Recharge the refrigerant in
right volume.
4. Electrical expansion valve
locked or winding connector
is loosen.
Tap-tap the valve body and
plug in/ plug off the
connector for several times
to make sure the valve is
working correctly. And
install the winding in the
right location
DHW mode:
Water tank heat exchanger
is smaller than the required
1.7m
2 .(10-16kW unit)or
1.4m
2
(5-9kW unit)
Cooling mode:
1.Heat exchanger cover is
not removed. Remove it.
2. Heat exchanger is dirty or
something is block on the
surface. Clean the heat
exchanger or remove the
obstruction.
The main control
board PCB B
EEprom failure
Low pressure
protection
High pressure
protection