Error: No Display Reading, Yellow Pilot Light Is On, Diode Is Not Lit; Error: No Display Reading, Yellow Pilot Light Is Off - Dentsply Sirona inFire HTC speed Service Manual

8 Troubleshooting
8.2 Error without message on the display
26
8.2.7 Error: No display reading, yellow pilot light is on, diode is
not lit
Description of the error
● No display.
● Yellow pilot light of ON/OFF switch is on.
● Diode does not light up when unit is switched on.
Cause
Protection fuse of the furnace is defective.
Elimination
Switch furnace off, wait for 30 seconds. Switch furnace on.
If this produces no results:
Cause
Controller board defective.
Elimination
Replace controller board (see "Replacing the controller board [ → 30]").
Call customer service.
8.2.8

Error: No display reading, yellow pilot light is off

Description of the error
● No display.
● Yellow pilot light of ON/OFF switch is off.
Cause
No line voltage.
Elimination
Check the breakers in the fuse box/the connecting cable.
Call customer service.
Dentsply Sirona
Service Manual inFire HTC speed
61 30 608 D3497
D3497.076.01.09.02 10.2018