61 30 459 D 3497
D 3497.201.01.19.02 09.2017
51
Dentsply Sirona 11Malfunctions
Operating Instructions inFire HTC speed 11.2Miscellaneous errors and their causes
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11.2
Miscellaneous errors and their causes
Error Cause Elimination
Wrong time displayed. Incorrect time in controller. Correct time settings (see function
key "F" [ → 44])
Furnace does not heat up although
autostart program is running.
Power was out for a long time during
the autostart program.
Check the power connection. Make
sure power connection is not
switched with a timer.
Controller LED indicates heating, but
the furnace does not heat.
Heating defective. Call customer service.
Furnace "forgets" the stored programs. Defective controller. Call customer service.
Furnace "forgets" the time. Defective controller. Call customer service.
No display. Yellow/white (from serial
numbers > 5000) pilot light of ON/OFF
switch is on. The LEDs flash briefly
after the unit is switched on.
Controller display is defective. Call customer service.
No display. Yellow/white (from serial
numbers > 5000) pilot light of ON/OFF
switch is on. The LEDs do not flash
briefly after the unit is switched on.
Protection fuse of the furnace is
defective.
Switch the furnace off, wait 30
seconds and then switch it back on.
If this produces no results: Replace
fuses F1 and F2 [ → 48]. Call
customer service.
No display. Yellow/white (from serial
numbers > 5000) pilot light of ON/OFF
switch is not on.
No line voltage Check the fuses in the fuse box,
check electrical connection. Call
customer service.
Furnace triggers circuit breaker. Unsuitable circuit breaker
Defective electronics
Check the circuit breakers as
specified.
Call customer service.
Furnace triggers the circuit breaker in
the fuse box.
FI is too sensitive or heating is
defective
Check whether FI is ≥ 30 mA. Call
customer service if necessary.
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