164
F091 Indoor
thermostat unit
CCT6
Short circuit
• Short circuit in indoor
thermostat unit
• Incorrect terminal connection
• Have the fault fixed by a
qualified electrician
F092 Upper boiler
temperature
sensor 2
Open circuit
• Sensor not connected
• Sensor is faulty
• Have the fault fixed by a
qualified electrician
F093 Upper boiler
temperature
sensor 2
Short circuit
• Short circuit in sensor or in
cable
• Both sensor connections
joined in a single terminal
• Have the fault fixed by a
qualified electrician
F100 Fault buffer
was deleted
• Displayed when the fault
buffer is deleted
• No action required
F101 Restart (power
ON)
• Entered in the fault buffer
when the control unit is
restarted
• No action required
F103 Heating circuit
module 1
ADC fault
• Analogue to digital converter
is faulty
• New heating circuit control
F104 Heating circuit
module 1
Fault in 0-
throughput
• Speed-controlled output is
faulty
• New heating circuit control
F170 No connection to
GSM module
• GSM module can not be
signalled by the central unit
• Cable connection is faulty
• GSM module without voltage
or faulty
• Have the fault fixed by a
qualified electrician
F171 GSM transmitter
error or
unavailable
network or SIM
card
• No GSM reception, no SIM
card in GSM module
• No credit balance on
telephone connection
• SIM card expired (e.g. if SIM
card has not been reloaded
for over a year)
• Check reception in info page
32
• Query credit balance
• Load SIM card
• Call HDG service
F200 CAN data
transmission
incorrect ID
• Data transmission to
Hydronic is faulty
• Call HDG service
F201 CAN data
transmission
read fault
• Data transmission to
Hydronic is faulty
• Call HDG service
No. Fault Cause Remedy
Table 8/1 - Faults (continuation)
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