Maytag MAH5500BWW Service Manual - Page 24

Input Signal Not Asserted, Input Signal Asserted - specifications

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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. The timer is solely used as an off-board set of relay switches. Note: The timer motor is hard wired to timer cams 10T and 10B in the timer. CYCLE SEQUENCE TIMER 1A (120 VAC) PK19/P7(8) TIM ER 1B (120 VAC) YL16/P7(7) TIMER 2A (24 VDC) PU17/P3(3) TIM ER 2B (24 VDC) BU18/P3(5) PREWASH TUM BLE 0 1 1 0 PREWASH DRAIN 1 1 1 0 MAIN WASH TUM BLE 0 1 0 0 LIGHT WA SH TUM BLE 1 1 0 0 BLEACH DISPENSE 1 0 1 0 RINSE TUMBLE 1 0 0 1 SPIN 1 0 0 1 0 SPIN 2 0 0 0 1 SPIN 3 0 1 0 1 EXTRA RINSE 1 1 0 1 DELAY 1 0 0 0 IDLE 0 0 0 0 Key: 0 = Input Signal Not Asserted 1= Input Signal Asserted There are conditions under which the machine control will shut the cycle down if the timer does not advance. - During Extra Wash/Prewash: If the timer inputs do not change away from Prewash Tumble for 15 minutes, the machine control will open the line relay. - During Main Wash: If the timer inputs do not change for 29 minutes, the machine control will open the line relay. - During any increment when the machine control energizes the timer motor until it sees the timer inputs change: If the timer inputs do not change for 5 minutes with the 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. In these cases, the machine control energizes the timer motor for 30 seconds, which is its advance time. It does not look for a timer input change. 16008373-01 SECTION 2. ELECTRICAL COMPONENTS & TESTING 2 - 4 © 1998 Maytag Corporation

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© 1998 Maytag Corporation
16008373-01
SECTION 2.
ELECTRICAL COMPONENTS & TESTING
2-4
Key
:
0 = Input Signal Not Asserted
1= Input Signal Asserted
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.
The timer is solely used as an off-board set of
relay switches.
Note:
The timer motor is hard wired to timer cams 10T and 10B in the
timer.
CYCLE SEQUENCE
TIMER 1A
(120 VAC)
PK19/P7(8)
TIM ER 1B
(120 VAC)
YL16/P7(7)
TIMER 2A
(24 VDC)
PU17/P3(3)
TIM ER 2B
(24 VDC)
BU18/P3(5)
PREWASH TUMBLE
0
1
1
0
PREWASH DRAIN
1
1
1
0
MAIN WASH TUMBLE
0
1
0
0
LIGHT WA SH TUM BLE
1
1
0
0
BLEACH DISPENSE
1
0
1
0
RINSE TUMBLE
1
0
0
1
SPIN 1
0
0
1
0
SPIN 2
0
0
0
1
SPIN 3
0
1
0
1
EXTRA RINSE
1
1
0
1
DELAY
1
0
0
0
IDLE
0
0
0
0
There are conditions under which the machine control will shut the cycle down if the
timer does not advance.
-
During Extra Wash/Prewash:
If the timer inputs do not change away from Prewash
Tumble for 15 minutes, the machine control will open the line relay.
-
During Main Wash:
If the timer inputs do not change for 29 minutes, the machine
control will open the line relay.
-
During any increment when the machine control energizes the timer motor until it
sees the timer inputs change:
If the timer inputs do not change for 5 minutes with the
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.
In these cases, the machine control
energizes the timer motor for 30 seconds, which is its advance time.
It does not look for
a timer input change.