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LED red
LED
yellow
LED
green
LED off
Table 6
LED display key
Factory reset
▶ To perform a factory reset, press and hold the button on the
key.
The LED flashes yellow for five seconds.
The restart takes place after two seconds.
8
Troubleshooting
If a fault cannot be corrected:
▶ Confirm the fault.
▶ Faults that are still active are displayed once again the next
time the control unit returns from the idle state.
▶ Call an authorised specialist or customer service and give
the fault code and sub-code, as well as the ID number of the
user interface.
_
_
Table 7
Your contractor must enter the ID no. here.
8.1
Rectify fault
Structure of table headers:
code - [cause or fault description].
Comfort+ II RF – 6720886122 (2018/07)
SET TIME + DATE
OFF
_
8.1.1 Faults in the control unit or key
User interface
In the event of a fault, a code is displayed.
1007 - [no wireless signal]
Description
No radio connection between
control unit and key.
Table 8
1009 - [no wireless signal or connection failed]
Description
No radio connection between
control unit and key.
Table 9
309x; x=number of heating circuit - [control unit
temperature sensor faulty]
Description
Control unit temperature
sensor outside the
permissible range.
Table 10
1004 - [fault in other control unit]
Description
Another control unit in the
system has developed a fault.
Table 11
1010 - [no communication with heat source via EMS-BUS]
Description
No communication, although
heat source is compatible
with EMS.
Table 12
1009 - [not connected]
Description
Wireless device is not
connected.
Table 13
Troubleshooting
Action
Check the signal strength and
position the control unit in a
better place.
Action
Reconnect wireless device.
Action
Replace control unit.
Action
Check other control units in
the system for faults.
Action
Replace EMS connections/
interfaces.
Action
Disconnect and reconnect all
wireless devices.
17
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