Service manual TD25
10
Testing the element, thermistor and temperature regulation
7. Press the start/stop button (S1).
• LED L3 starts to flash and the large element loop acti-
vates.
8.
Press the start/stop button (S1).
• LED L3 lights continuously and the machine runs heat
regulation for 15 minutes.
•
LED L4 starts flashing, which means that temperature
regulation is finished.
•
Cooling runs for 5 minutes.
• The machine stops.
Indication of faults:
Fault indication/symp-
tom
Cause
The element does not
start.
Element or cable fault
The programme stops.
F9 is shown in the dis-
play (applies to machi-
nes with a display).
The front thermistor is
not connected.
Testing the interval time and buzzer tone
9. Press the start/stop button (S1).
• LED L4 lights up.
• The motor starts and runs at intervals at the same time
as a buzzer sounds.
Indication of faults:
Fault indication/symp-
tom
Cause
No buzzer tone Fault in control
Cancel the test programme.
10. Press the start/stop button (S1).
• The test programme stops and ”End” is shown in the display (applies to machines with a display).
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