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IM-HC 599871 0321 RABS
Errors / Fault Indications
7 Errors / Fault Indications
Control units, thermostats, and circuit hubs flash red to indicate a fault.
To identify the cause of the fault, count the number of flash signals in
one interval and consult the table below for the potential cause.
For a plain text indication of the faults in the operating software,
see
6.1.22 “Central Settings / Fault Menu” on page 90.
Red-flashing LED
Only one fault can be indicated at a time. After remedying
the fault, check whether other fault indications are present.
7.1
Control Unit
Fault indication by LED “status” flashing red.
LED “status” flashes red
Potential causes
Corrective actions
3 x
Radio connection to the thermostat
is interrupted
Check signal strength
Check the location of the thermostat
Ä
Room thermostat: batteries empty Replace batteries
Room thermostat: distance to
control unit too large
Use a range extender
4 x
Cable circuit hub defective
Check cable and plugs
Fault at powerhead bus
Check the mounting of the circuit
hubs
Replace the circuit hub
Replace the control unit
5 x
Supply temperature too high/low
Adjust the supply temperature at the
boiler
Supply sensor defective
Check cable and plugs
Replace temperature sensor
6 x and red LED at a circuit hub
Temperature sensor of circuit hub
defective
Replace the circuit hub
Check the mounting of the circuit
hub
AKT
OR
VL-TEM
P
TAUP
.
RS-232
RESET