Ver
sion:
M
P4/
6 G
3
08/
01
/2024
32
Troubleshooting outdoor sensor
The outdoor sensor must not be connected to the circuit board during
resistance measurement.
Measurement points on the circuit board
Values
Error codes
Error code
Explanation
F01: Boiler sensor
Alarm: The boiler’s temperature sensor is broken
or the temperature cannot be measured.
F02: Overheat pro-
tection triggered
Alarm: The boiler has triggered the mechanical
overheating protection.
F03: Low boiler temp
Alarm: The boiler temperature is +3°C or lower.
F06: Low voltage
Alarm: The voltage on the circuit board is too low.
W01: Internal
over-temp
Warning: The temperature in the power board is (or has
been) too high. If the temperature of the circuit board
exceeds 55°C, the boiler will switch off the heating.
When the temperature drops to 45°C, the boiler will
resume heating again.
W02: High boiler temp Warning: The over-temperature protection has
temporarily stopped the boiler from heating.
When the boiler temperature has dropped by 5°C,
regulation will be resumed.
W03: Low boiler temp
Warning: The boiler temperature is (or has been) +5°C
or lower. No impact on regulation.
W04: Outdoor sensor
Warning: The outdoor sensor is faulty or outside the
measurement range. The regulation continues to
regulate and assumes outdoor temperature = 0°C
W05: Room sensor
Warning: The room sensor is faulty or outside the
measurement range. Regulation continues without the
room sensor.
W06: Room sensor
Warning: The setting control for the room sensor
is faulty or outside the measuring range.
Regulation continues without the room sensor
W07: Internal sensor fau Warning: The temperature sensor on the power board is
faulty or outside the measurement range. Regulation
continues as usual.
°C
kΩ
V
°C
kΩ
V
-40
88.7
4.5
0
8.8
2.3
-35
64.2
4.3
5
6.8
2.0
-30
47.0
4.1
10
5.4
1.7
-25
34.7
3.9
15
4.2
1.5
-20
25.9
3.6
20
3.4
1.3
-15
19.5
3.3
25
2.7
1.1
-10
14.8
3.0
30
2.2
0.9