Code
Display text
Description
Solution
H.01.06
Max Delta TH-TF
Maximum difference between heat
exchanger temperature and flow
temperature
Maximum difference between heat exchanger
and flow temperature exceeded:
No flow or insufficient flow:
Check the circulation (direction, pump,
valves).
Check the water pressure.
Check the cleanliness of the heat exchanger.
Check that the installation has been de-aired.
Check water quality according to supplier's
specifications.
Sensor error:
Check that the sensors are operating correct
ly.
Check that the sensor has been fitted proper
ly.
H.01.07
Max Delta TH-TR
Maximum difference between heat
exchanger temperature and return
temperature
Maximum difference between heat exchanger
and return temperature exceeded:
No flow or insufficient flow:
Check the circulation (direction, pump,
valves).
Check the water pressure.
Check the cleanliness of the heat exchanger.
Check that the installation has been correctly
vented to remove air.
Sensor error:
Check that the sensors are operating correct
ly.
Check that the sensor has been fitted proper
ly.
H.01.08
CH Temp Grad. Level3 Maximum CH temperature gradient
level3 exceeded
Maximum heat exchanger temperature increase
has been exceeded:
No flow or insufficient flow:
Check the circulation (direction, pump,
valves)
Check the water pressure
Check the cleanliness of the heat exchanger
Check that the central heating system has
been correctly vented to remove air
Sensor error:
Check that the sensors are operating correct
ly
Check that the sensor has been fitted proper
ly
H.01.09
Gas Pressure Switch
Gas Pressure Switch
Gas pressure too low:
No flow or insufficient flow:
Make sure that the gas valve is fully opened
Check the gas supply pressure
If a gas filter is present: Make sure that the
filter is clean
Wrong setting on the gas pressure switch:
Make sure that the switch has been fitted
properly
Replace the switch if necessary
H.01.13
Max THeat Ex
Heat Exchanger temperature has
exceeded the maximum operating
value
Maximum heat exchanger temperature excee
ded:
Check the circulation (direction, pump, valves).
Check the water pressure.
Check that the sensors are operating correctly.
Check that the sensor has been fitted properly.
Check the cleanliness of the heat exchanger.
Check that the central heating system has
been correctly vented to remove air.
10 Troubleshooting
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