Glow-worm Clearly Hybrid - Universal Module System - Manual (Page 30)

0020096317_01 - 02/11 - Glow-worm
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MAINTENANCE
11 Trouble-shooting
11.1 Fault diagnosis
• The following checks should be performed before proceeding
onto specifi c diagnostics:
- Make sure that the electricity supply has not been interrupted
and that the appliance is connected correctly.
- Ensure that the isolating valves are open.
- Check that all external controls are connected correctly.
11.2 System fault codes
i The faults described in this chapter should be carried
out by a qualifi ed engineer and if needed by the After
Sales Service.
• Refer to the instructions for each element making up the
system for their fault codes.
Fault
codes Description
Cause Solution
001
Failure in Ebus communication between
with the boiler
The boiler is not connected to the
control unit.
The cable polarity is reversed.
The boiler is off .
Check that the boiler is connected to the control unit.
Check the connection’s + / - polarity.
Ensure that there is no interruption to the electricity network
and that the boiler is properly connected and turned on.
002
Failure in Ebus communication between
with the heat pump
The heat pump is not connected to the
control unit.
The heat pump is off .
Make sure the heat pump is connected to the control unit.
Ensure that there is no interruption to the electricity network
and that the heat pump is properly connected and turned on.
003
Failure in Ebus communication between
with the hydraulic module
The hydraulic module is not connected
to the control unit.
The hydraulic module is off .
Make sure that the hydraulic module is connected to the
control unit.
Ensure that there is no interruption to the electricity network
and that the hydraulic module is properly connected and
turned on.
010
Heating circuit fl ow temperature sensor
failure (open circuit)
The sensor is defective or not
properly connected to the control unit
management or hydraulic module.
Check the sensor’s connections.
Verify that the position and the operation of the sensor are
correct.
Check the sensor’s resistance.
011
Heating circuit fl ow temperature sensor
failure (short circuit)
The sensor is shorted.
012
Heating circuit fl ow temperature sensor
failure low temperature (open circuit)
The sensor is defective or not properly
connected to the control unit.
Check the sensor’s connections.
Verify that the position and the operation of the sensor are
correct.
Check the sensor’s resistance.
013
Heating circuit fl ow temperature sensor
failure low temperature (short circuit)
The sensor is shorted.
014
Domestic water tank temperature
sensor failure (open circuit)
The sensor is defective or not properly
connected to the control unit.
Check the sensor’s connections.
Verify that the position and the operation of the sensor are
correct.
Check the sensor’s resistance.
015
Domestic water tank temperature
sensor failure (short circuit)
The sensor is shorted.
021 Pressure too low <0.5 bar
There is a leak in the heating circuit.
The venting was not carried out
correctly.
Check that there are no leaks.
Drain the heating circuit. Remove air.
Fill the installation.
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