F66 - Air Leakage; Laundry Is Overdried/F55 (Overriding Time Limit Exceeded); Appliance Not Functioning/Wrong Version Detected - Miele T 80 Series Technical Information

T 80xx
3.15

F66 - Air Leakage

Symptom:
This fault occurs in the normal operating mode.
"Filter/Vent" LED lights up.
Program stop.
Cooldown.
Buzzer intermittently for 2 minutes.
Cause:
Air paths are clogged.
Insufficient-air detection; refer to Section 090-2.7.
Remedy:
1. Vented and condenser dryers: Clean the air paths.
2. Clean and dry the door lint filter.
3. Vented dryers only: Clean the vent grille.
4. Condenser dryers only: Clean and dry the fill-ring lint filter.
5. Condenser dryers only: Clean the heat exchanger.
Note:
To delete this fault indication, disconnect the dryer from power.
3.16

Laundry is Overdried/F55 (Overriding Time Limit Exceeded)

Symptom:
Very long operating time.
F55 is stored in the fault memory.
Cause:
Short circuit at drum contact strip. A metal bracket of the drum contact strip is
touching the drum casing and has caused a short circuit. Therefore, the
electronics are detecting moisture, even though the laundry is already dry.
Remedy:
1. Insulate the bracket from the drum casing:
2. Place an insulating sleeve (mat. no. 07244210) around the bracket.
Note:
In order to clear this fault message, open and close the door with the
appliance switched on.
3.17

Appliance Not Functioning/Wrong Version Detected

Symptom:
Although the appliance is a condenser dryer, a vented dryer is recognized.
"Vented" is displayed in the MDU.
In service mode the buzzer buzzes continuously for the "vented" version.
Cause:
Moisture in the area of the condensate pump. Moisture in the reed switch (on
or in the plug) will cause contact resistance, so that the condensate pump is
55
Technical Information