Miele T 980x - Overriding the Time Control; Insufficient Air Detection; Operating Hours Counter; Low-Voltage Detection

Technical Information
52
T 980x/T 982x
2.6 Overriding the Time Control
A fixed maximum time of approximately 180 minutes is imposed on all
residual moisture drying programs at program start. After this time has
elapsed, any drying program is stopped and the cooldown phase for faults is
carried out. There is no anti-crease action, and no fault code is indicated, but
the fault is saved and can be called up in service mode.
2.7 Insufficient Air Detection
The heater bank NTC (2R30) monitors the temperature increase in the heater
bank. If the air paths are clogged during heating, the temperature in the
heater bank rises rapidly. This is detected and the fault message Insufficient
air is displayed. If the temperature at the heater bank NTC exceeds 356°F
(180°C), fault code F66 (Leaking air) is issued.
2.8 Operating Hours Counter
The time is counted from program start to the end of cooldown, without the
time for delay start and anti-crease action.
2.9 Low-Voltage Detection
The motor can only run with sufficient supply voltage. Because the motor is
mechanically linked to the fan, no air current is created when the motor is not
running. The dryer will then overheat during heating and trip the circuit
breaker.
In order to avoid overheating, shut the dryer electronics off completely when
they detect low voltage. This is the case when the supply voltage:
- falls below the emergency threshold
- falls below the lower low-voltage value for longer than one second
- falls below the lower low-voltage value more than once in 10 seconds
When the upper low-voltage value (see Table 090-3) has been reached, the
dryer electronics may be switched back on.
Emergency
Threshold
Lower Low
Voltage
Upper Low
Voltage
Forced appliance
shutoff
Secure appliance
shutoff
Secure appliance
switch-on
Tolerance: ± 1.5%
of the nominal
voltage
Tolerance: ± 1.5%
of the nominal
voltage
Tolerance: ± 1.5%
of the nominal
voltage
USA (120V, 60Hz)
< 80V
< 102V - 3% of the
nominal voltage
> 108V - 3% of the
nominal voltage
Table 090-3: Values for Low-Voltage Detection