Maytag MDE/MDG21PDA Service Manual page 23

Troubleshooting Procedures
To avoid risk of electrical shock, personal injury or death, disconnect power to unit before servicing, unless testing
requires power.
Single Dryer Troubleshooting Guide
No
Response
To Coin 1 or
Coin 2
If the problem still
exists, replace the
optic sensor.
If the problem still
exists, replace the
control board.
©2004 Maytag Appliances Company
!
Is the display blank? No
Yes
See "Blank
Display " section.
Clean the optic
16022904 Rev. 0
WARNING
Enter service mode using using
service switch. Does display
contain a diagnostic code?
Is the coin slide option
selected?
No
Is debit only mode
selected?
No
Is price suppression
selected?
No
Drop a coin through the coin
1 (or coin 2) drop. does the
"*" in the display flash?
No
Check the coin
mechanism for
proper adjustment.
Is the resistance
between the red wire and
No the white wire in the coin
1 connector greater than
10K ohms?
sensor, if
necessary
See diagnostic
Yes
code guide
Timings for the coin slide
mode will cause coins to
not be counted .
Deselect the coin slide
mode.
Coins are ignored if in
debit only mode. Select
Yes
the coin and debit or coin
only mode.
The price and amount
remaining to be added
Yes
do not display in price
suppression mode.
Go to the section
Yes "Abnormal Display
Or Function"
Check wiring and termination
between coin 1 (or coin 2)
drop and the control board.
Unplug dryer and the
coin 1 connector
No
Make sure that there is not
too much ambient light. If
problem still exists, replace
the coin1 (or coin 2) optic
sensor.
23