Table of Contents
Advertisement
Malfunction or
Error code
protection
The main control
board PCB B
EEprom failure
H6 displayed 10
times in 2 hours
Low pressure
protection
High pressure
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.
Refer to H6
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.
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
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
.(10-16kW unit)or
2
2
1.4m
(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.
Malfunction or
Error code
protection
Compressor
overcurrent
protection.
High discharge
temperature
protection.
High Temperature
difference
protection between
water inlet and
water outlet of the
plate heat
exchanger.
Module protection
54
Failure cause and Corrective
action
1.The same reason to P1.
2. Power supply voltage of
the unit is low, increase the
power voltage to the
required range.
1.The same reason to P1.
2. System is lack of
refrigerant volume. Charge
the refrigerant in right
volume.
3.TW_out temp sensor is
loosen Reconnect it..
4. T1 temp sensor is
loosen. Reconnect it.
5. T5 temp sensor is
loosen. Reconnect it.
1. Check that all shut off
valves of the water
circuit are completely open.
• Check if the water filter
needs cleaning.
• Refer to "9.4 Charging
water"
• Make sure there is no air
in the system (purge air).
• Check on the manometer
that there is
sufficient water pressure.
The water
pressure must be >1 bar
(water is cold).
• Check that the pump
speed setting is on
he highest speed.
• Make sure that the
expansion vessel is
not broken.
• Check that the resistance
in the water
circuit is not too high for the
pump (refer to "10.6 Setting
the pump speed" ).
1. Power supply voltage of
the unit is low, increase the
power voltage to the
required range.
2. The space between the
units is too narrow for heat
exchange. Increase the
space between the units.
3. Heat exchanger is dirty or
something is block on the
surface. Clean the heat
exchanger or remove the
obstruction.
4. Fan is not running. Fan
motor or fan is broken,
Change a new fan or fan
motor.
V.2
Advertisement
Table of Contents
