162
F055 Short circuit in
lower boiler
temperature
sensor
• Short circuit in sensor or in
cable
• Both sensor connections
joined in a single terminal
• Have the fault fixed by a
qualified electrician
F056 Open circuit in
temperature
sensor for oil-
fired boiler
• Sensor not connected
• Sensor is faulty
• Have the fault fixed by a
qualified electrician
F057 Short circuit in
temperature
sensor for oil-
fired boiler
• Short circuit in sensor or in
cable
• Both sensor connections
joined in a single terminal
• Have the fault fixed by a
qualified electrician
F058 Open circuit in
temperature
sensor for solar
collector
• Sensor not connected
• Sensor is faulty
• Have the fault fixed by a
qualified electrician
F059 Short circuit in
temperature
sensor for solar
collector
• Short circuit in sensor or in
cable
• Both sensor connections
joined in a single terminal
• Have the fault fixed by a
qualified electrician
F060 Open circuit in
temperature
sensor for
district heating
• Sensor not connected
• Sensor is faulty
• Have the fault fixed by a
qualified electrician
F061 Short circuit in
temperature
sensor for
district heating
• Short circuit in sensor or in
cable
• Both sensor connections
joined in a single terminal
• Have the fault fixed by a
qualified electrician
F062 No. of IO module
too high or
already exists
• Customer no. of heating
circuit module and control
system differ
• Call HDG service
F063 Heating circuit
module 0 ADC
fault
• Analogue to digital converter
is faulty
• New heating circuit control
F064 Heating circuit
module 0 Fault
in 0-throughput
• Speed-controlled output is
faulty
• New heating circuit control
F075 Heating circuit
module 1
is not connected
• Power supply has failed
• Bus cable is not connected
• Bus cable is fitted the wrong
way around
• Check the power supply
• Have the fault fixed by a
qualified electrician
No. Fault Cause Remedy
Table 8/1 - Faults (continuation)
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