HDG Compact 25 - Page 173

8 Troubleshooting – Possible faults
173
F041 Supply temp. HC1
short circuit
• Short circuit in sensor or in
cable
• Both sensor connections joi-
ned in a single terminal
• Have the fault fixed by a qua-
lified electrician
F042 Supply temp. HC2
open circuit
• Sensor not connected
• Sensor is faulty
• Have the fault fixed by a qua-
lified electrician
F043 Supply temp. HC2
short circuit
• Short circuit in sensor or in
cable
• Both sensor connections joi-
ned in a single terminal
• Have the fault fixed by a qua-
lified electrician
F044 Supply temp. HC3
open circuit
• Sensor not connected
• Sensor is faulty
• Have the fault fixed by a qua-
lified electrician
F045 Supply temp. HC3
short circuit
• Short circuit in sensor or in
cable
• Both sensor connections joi-
ned in a single terminal
• Have the fault fixed by a qua-
lified electrician
F046 Indoor
therm.unit HC1
open circuit
• Sensor not connected
• Sensor is faulty
• Have the fault fixed by a qua-
lified electrician
F047 Indoor
therm.unit HC1
short circuit
• Short circuit in sensor or in
cable
• Both sensor connections joi-
ned in a single terminal
• Have the fault fixed by a qua-
lified electrician
F048
to
F061
Open circuit or
short circuit in
temp. sensors or
indoor thermos-
tat units
• see F046 and F047 • see F046 and F047
F062 IO-module no.
too high or in
use
• Module number set too high
in control unit
• Set module number to “0”
F063 HC module 0
ADC fault
• Sensor input is faulty • Replace control unit
F064 HC module 0
Error 0 signal
• Heating circuit module is
faulty
• Replace heating circuit
module
F070 Temp. acc. top
house 1 short
circuit
• Short circuit in sensor or in
cable
• Have the fault fixed by a qua-
lified electrician
F071 Temp. acc. top
house 1 open
circuit
• Sensor not connected
• Sensor is faulty
• Have the fault fixed by a qua-
lified electrician
No. Fault Cause Remedy
Table 8/1 - Faults