Table of Contents
Advertisement
8.2
Testing the Conductivity Contacts
Impedance Test
To enter the conductivity impedance test mode, enter the diagnostic mode then press the TIME
DRY button five times. In this mode, touching damp clothes or fingers across the conductivity
contacts will cause the LED display to change. If the contacts, or harness to them, have gone
open circuit, no change will occur in the LED display. This is a useful method of checking the
integrity of the sensor cells. To exit the diagnostic mode, press the POWER button.
Resistance Test
An alternative, but slightly less reliable, method of testing the conductivity contacts is to test the
circuit with a multimeter. When using this method, the power to the dryer must be switched off.
Place one probe of the multimeter on each conductivity contact.
6.4Mohms + 2%.
8.3
Show Room Mode
To enter Show room mode, ensure the dryer is on at the power supply but off at the console. Push
and hold the DRYNESS LEVEL button, then press the POWER button.
To exit show room mode, disconnect the machine from the power supply.
8.4
Data Download Mode
Encoded data is transmitted out of the Lid Lock LED, and can be captured by an optical download
pen attached to a PC or hand held palm PC, where "Smart Tool" software interprets the data to aid
servicing. To enter the data down load mode.
1.
Enter diagnostic mode as described in Section 8.1.
2.
Push the START/PAUSE button and the Lid Lock LED will flash. The machine is now in
down load mode
To exit the Data Download mode, press the POWER button.
9
AUTOSENSING
When wet or damp clothes are loaded into a dryer they are partially saturated with water, which is
a relatively good conductor of electricity. In the AeroSmart™ dryer, sensor bars (located beneath
the lint bucket) are used to measure the conductivity. When moisture in the clothes touches
across the sensor bars, their conductivity is measured. As the clothes dry they become less
conductive and it is this measurement that is used to calculate the dryness of the clothes load.
Large loads will brush against these sensor bars more frequently than small loads, and this strike
count is used to help determine the dryness of different sized loads.
Different fabrics retain moisture differently. A thick towel containing a lot of moisture will often
conduct the same as a light synthetic garment containing very little. It is this difference in fabric
characteristics plus the initial unknown moisture content that makes the calculation of dryness
reasonably complex. To test the sensor bars, refer to Section 7.3 (LCD models) or Section 8.2
(LED models).
10
TEMPERATURE CONTROL
Autosensing is automatically selected when the AeroSmart™ dryer is turned on. The user can
select a time dry option of 20, 40 or 80 minutes through the Options menu. Autosensing of the
clothes load dryness level is achieved by touch sensors that sense the moisture content of the
load. An exhaust temperature sensor is used to monitor the exhaust temperature. The controller
limits the temperature to what is required for the various cycles and determines what elements are
used.
19
517760C
The resistance should be
Hide quick links:
Advertisement
Table of Contents
