9- Remove the connectors on the water pressure sensor and measure the DC voltage values while the boiler is
connected to power supply. Check whether the measurement is within the 4.9-5.1 V DC range. If the value is
out of this range, replace the pressure sensor.
10- If the problem persists, replace the mainboard.
F39
Outdoor
Temperature
Sensor Error
The outdoor
temperature
sensor may be
defective.
1- Check the connection and conductivity of the outdoor temperature sensor cables. If there is a
problem, replace the outdoor temperature sensor.
2- While the outdoor temperature sensor is not connected, ensure that the P35 parameter is set to “0”. If P35 is
not “0”, set its value to “0”.
F40
High Water
Pressure Error
This occurs when
the water pressure
sensor detects high
water pressure
(
≥
2.9 bar) which
may be dangerous
for your device.
1- Check the heater circuit water pressure of your device. If the value is greater than 2.9 bar, reduce the
water pressure. If the water pressure value is lower than 2.9 bar and the problem persists, replace the
mainboard.
2- Check the connection and conductivity of the pressure sensor cables. If there is a problem, replace
the cables.
3- Remove the connectors on the water pressure sensor and measure the DC voltage values between the
input and GND at the cable ends while the boiler is connected to power supply. Check whether the
measurement is within the 4.9-5.1 V DC range. If the value is out of this range, replace the pressure sensor.
4- If the problem persists, replace the mainboard.
5- Check if the pressure of the expansion tank is above 0.5 bar. If the pressure is low, pressurize by pumping air
up to 1 bar. If this problem repeats within 6 months, replace the expansion tank.
6- Make sure the filling valve is completely closed and functional. Replace if necessary.
-
7- There may be a whole in the plate heat exchanger. If the water pressure increases while the filling tap is
off and the boiler is not operating, replace the plate heat exchanger.
F41
Water filling
(auto) operational
Automatic water
filling is in
progress.
1- Automatic water filling valve is working. This is an informational message.
2- If the automatic water filling valve is not installed, make sure that the parameter P03 is set to “0”. 3- If the
problem persists, replace the mainboard.
F42
Water filling
(auto) not
completed
The water filling
valve may be
defective or the
mains water
pressure may be
insufficient.
F43
Low water pressure
error after automatic
water filling
The water filling
valve may be
defective or the
mains water
pressure may be
insufficient.
F47
Water Pressure
Sensor Error
There is no water
pressure sensor
installed or there is
loose contact.
1-
Check the connection and conductivity of the pressure sensor cables. If there is a problem,
replace
the cables.
2-
Replace the pressure sensor.
3-
If the problem is not resolved, replace the mainboard.
F49
Modulating room
thermostat
communication
error
Room thermostat
is defective or
there is a
connection
problem
1- Turn the device off and on.
2- Check the connection and conductivity of the cable between the room thermostat and the boiler and check
for any damage. If there is a problem, replace the cable.
3- If the room thermostat is working properly, replace the mainboard.
17
Summary of Contents for CONFEO PREMIX P 14 HM
Page 1: ...SERVICE MANUAL CONFEO PREMIX CONDENSING BOILER CONFEO PREMIX P 14 20 24 28 30 35 HM HCH HST...
Page 24: ...12 ELECTRICAL DIAGRAM Figure 15 24...
Page 34: ...Low Voltage Removing installing the pump cable FAN PWM CABLE Figure 39 Figure 40 34...
Page 52: ...Figure 76 Figure 77 52...
Page 83: ......
