Maytag Neptune MAH3000 Service Manual page 24

Software in the machine control board specifically monitors the timer input circuits to
determine where the timer is in all the wash cycles and will rapidly advance the timer to
OPEN and break contacts in the timer.
relay switches. Note: The timer motor is hard wired to timer cams 10T and 10B in the
t i m e r .
CYCLE SEQUENCE
PREWASH TUM BLE
PREWASH DRAIN
MAIN WASH TUM BLE
LIGHT WA SH TUM BLE
BLEACH DISPENSE
RINSE TUMBLE
SPIN 1
SPIN 2
SPIN 3
EXTRA RINSE
DELAY
IDLE
Key: 0 = Input Signal Not Asserted
There are conditions under which the machine control will shut the cycle down if the
timer does not advance.
- During Extra Wash/Prewash:
Tumble for 15 minutes, the machine control will open the line relay.
- During Main Wash:
control will open the line relay.
- During any increment when the machine control energizes the timer motor until it
sees the timer inputs change:
timer motor continuously energized, the machine control will open the line relay.
These varying delays are to allow the washer to progress through several increments
where the timer inputs normally do not change.
energizes the timer motor for 30 seconds, which is its advance time.
a timer input change.
1 6 0 0 8 3 7 3 - 0 1
The timer is solely used as an off-board set of
TIMER 1A TIM ER 1B
(120 VAC) (120 VAC)
PK19/P7(8) YL16/P7(7)
0
1
0
1
1
1
0
0
0
1
1
0
If the timer inputs do not change away from Prewash
If the timer inputs do not change for 29 minutes, the machine
If the timer inputs do not change for 5 minutes with the
© 1998 Maytag Corporation
TIMER 2A
(24 VDC)
PU17/P3(3)
1 1
1 1
1 0
1 0
0 1
0 0
0 1
0 0
1 0
1 0
0 0
0 0
1= Input Signal Asserted
In these cases, the machine control
SECTION 2. ELECTRICAL COMPONENTS & TESTING
TIM ER 2B
(24 VDC)
BU18/P3(5)
0
0
0
0
0
1
0
1
1
1
0
0
It does not look for
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