TROUBLESHOOTING
Page 60
Service Manual TDR8 P Gas form 9124023 rev. 01/2022
Symptom
Possible causes
No ignition of the gas in the bur-
ner (reset light is
not
burning).
1. Reset switch malfunction.
2. Reset light on operation panel broken.
3. Reset on gas control block is on. Press this to reset. See page 44.
4. Gas burner safety control malfunction.
5. Wiring loose.
Reset light is burning continu-
ous.
1. Safety thermostat tripped. Reset the thermostat with red button
(only for serial nrs. 10638 and 100064776 till 779.
2. Too many resets made (more than 4 and also red indication on bur-
ner control is flashing). Pull the plug out and in again.
3. Reset switch malfunction. See also page 44.
Burner switches on and off inter-
mittently during operation.
1. Reset switch malfunction.
2. Adjustment of ionisation pin.
3. Gas pressure too low (under 15 mbar).
4. Gas burner safety control malfunction.
Gas ignites in burner but cuts off
after a short time. (reset light is
burning).
1. Ionization pin malfunction.
2. Adjustment of ionization pin.
3. Loose wiring of ionization pin.
4. Gas burner safety control malfunction.
Burner stops during operation.
1. Gas supply blocked.
2. Adjustment of ionization pin.
3. Ionization pin malfunction.
4. Gas burner safety control malfunction.
5. Safety thermostat tripped. Reset the thermostat with red button.
(only for serial nrs. 10638 and 100064776 till 779.
6. Wiring ionization pin.
Gas mixture blower only runs in
high speed.
1. Gas burner safety control malfunction.
2. Gas mixture blower malfunction.
3. Wiring loose.
Error 11.
1. PT sensor malfunction.
2. Wiring PT sensor shortened.
Error 33.
1. PT sensor malfunction.
2. Wiring PT sensor loose.
Error 55.
See also extra explanation on
next page.
1. P.T. sensor malfunction.
2. Parameter setting of “temp.grad” is not on value 3. (see page 52).
3. Setting of temp. in cooking program is too high (solved in software
version V11.03.07 and higher). Load latest software.
4. Safety thermostat malfunction.
Error 77.
See also extra explanation on
page 41.
1. Check heat number in cooking program.
2. Cooking program malfunction. Erase program, create new program,
run a reference batch and run a second batch for verification.
Error 88.
See also extra explanation on
page 41.
1. Check heat number in cooking program.
2. Heating element malfunction.
3. Cooking program malfunction. Erase program, create new program,
run a reference batch and run a second batch for verification.
Application error.
A: No standard screen when
switching on.
B: APP. error on screen.
A1. Make a complete reset by pulling out the plug for 1 sec.
A2. CPU board malfunction.
B1. Memory stick failure.
B2. Load latest software version. (solved in V1.03.08 or higher).