Intergas Heating Ltd 46
11.2.4 No heating (CH)
Possible causes: Solution:
Room thermostat / weather-dependent
adjustment not closed or faulty.
Check the wiring.
Replace the thermostat.
Replace the weather-dependant adjustment.
No
No current (24 V).
Check the wiring against the diagram.
Check the connector X4.
Replace the faulty manager.
No
Pump not running.
Check the power supply.
Check connector X2.
Replace faulty pump.
No
Burner not firing on CH: sensor S1 or S2 faulty. Replace sensor S1 or S2. See fault code.
No
Burner does not ignite. See burner does not ignite.
11.2.5 The power is reduced
Possible causes: Solution:
At high rpm the power has fallen by more than
5%.
Check appliance and flue system for fouling.
Clean the appliance and flue system.
11.2.6 CH does not reach temperature
Possible causes: Solution:
Room thermostat setting incorrect. Check the setting and if necessary adjust.
No
Temperature is too low.
Increase the CH temperature. See Operating CH . Check outside sensor for short-
circuiting. Rectify.
No
Pump not running correctly. Pump setting is too
low.
Increase pump setting, or replace the pump.
No
No circulation in the installation.
Check whether there is circulation: at least 2 or 3 radiators must be open.
No
The boiler power has not been correctly set for
the installation.
Adjust the power. See setting maximum CH power.
No
No heat transfer as a result of lime scale or
fouling in the heat exchanger.
De-scale or flush the heat exchanger on the CH side.
11.2.7 No hot water (DHW)
Possible causes: Solution:
Flow sensor not functioning.
DHW flow < 2.0 l/min.
Replace the flow sensor.
No
No voltage at the flow sensor (5V DC). Check the wiring according to the diagram.
No
Burner not firing on DHW: S3 faulty.
Replace S3.
No
Burner does not ignite.
See burner does not ignite.
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