0020148679_00 - 11/12 - Glow-worm
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INSTALLATION AND SERVICING
EN
10.2 Table of system failure codes
Code 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
003
Failure in eBUS communication between with the
hydraulic module
004
Mixer manager I/O card (extension card)
communication fault
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 hot water tank upper sensor fault (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 hot water tank upper sensor fault (short
circuit)
The sensor is shorted.
016
Domestic hot water tank lower sensor fault (open
circuit)
The sensor is defective or not properly connected
to the control unit.
017
Domestic hot water tank lower sensor fault (short
circuit)
The sensor is shorted.
020 Pressure sensor failure
The sensor is defective or not properly
connected to the hydraulic module.
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.
030
Failure in communication with the zone 1 room
thermostat.
Wireless room thermostat:
The room thermostat is too far from the control
unit.
There is a problem with the batteries in room
thermostat.
Wired room thermostat :
The room thermostat is not properly connected
to the control unit.
Wireless room thermostat:
Check the location of the thermostat.
Check that the thermostat’s batteries are
installed in their compartment.
Make sure the battery polarity is not
reversed.
Make sure the batteries are not dead.
If so, replace them with new batteries
Wired room thermostat :
Check room thermostat's connections.
031
Failure in communication with the zone 2 room
thermostat.
032
Failure in communication with the zone 3 room
thermostat.
036
Failure in communication with the wireless
outdoor sensor
The wireless outdoor sensor is too far from the
control unit.
Check the location of the outdoor sensor.
Check that the sensor’s power supply is
correctly provided by a photovoltaic cell.
The outside sensor has no battery to be
replaced.
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