Instructions

60
Troubleshooting
8.4 Error codes and flashing sequences
Flashing code /
LC display
Meaning Solution
F1 Valve drive
sluggish
Please check whether
the valve pin is stuck.
F2 Actuating
range too
wide
Check the fastening
of the radiator
thermostat
F3 Adjustment
range too
small
Please check whether
the valve pin is stuck.
Short orange
flashing
Radio trans-
mission/at-
tempting to
transmit or
transmission
of configu-
ration data
Wait until the trans-
mission is completed.
1x long green
lighting
Transmission
confirmed
You can continue
operation.
1x long red
lighting
Transmission
failed or duty
cycle limit is
reached
Please try again (see
sec. “8.2 Command
not confirmed” on
page 58 or “8.3 Duty
cycle” on page 59).
Short orange
flashing
(every 10 s)
Teach-in
mode active
Enter the last four
numbers of the
device serial number
to confirm (see “5.1
Teaching-in” on page
44).