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12. Troubleshooting
Problem Possible cause Remedy
Permanent acoustic signal • Heavy operation of the • Remove valve opera-
and display of “F1” on the valve or blocked valve. ting mechanism.
valve operating mechanism’s • Manually check
display. valve operation.
•Re-install valve ope-
rating mechanism.
•If necessary ask a
heating expert for
advice.
Permanent acoustic signal • Control range too wide. • Re-install valve
and display of “F2” on the • Valve operating mecha- operating mechanism.
valve operating mechanism’s nism not mounted on • Unsuitable valve.
display. heating valve. • Put a 1mm spacer
(e.g. a shim) between
heating valve and
actuator.
Permanent acoustic signal • Control range too narrow. • Re-install valve
and display of “F3” on the operating mecha-
valve operating mechanism’s nism.
display. • Unsuitable valve.
No antenna symbol displayed • Radio connection failure • Install heating control
on the valve operating due to interference. in a different loca-
mechanism’s display. At an • Heating control battery tion.
interval of one hour the valve empty. • Replace heating
operating mechanism gene- • Wrong heating control control batteries.
rates a sequence of tones. code. • Transmit the current
The valve opening is 30%. safety code to the
valve operating
mechanism.
“Low Bat” symbol displayed • Valve operating mecha- • Replace the batteries.
on the display, for one hour nism batteries almost
and at an interval of 2 min. empty.
the valve operating mechanism
generates a sequence of tones.
Display of “LOC” when key is • Key lock is active. • Deactivate the key
pressed. lock.
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