Maytag MAH5500BWW Service Manual - Page 110

BASIC MACHINE OPERATION Models MAH5500B and MAH7500 are similar to the MAH4000 washer, with the exception being they do not have recirculation of the wash water. A special sump cap is placed directly above the sump area which catches the detergent and allows for a better mixing of the detergent and the wash water. The door lock mechanism was updated from a wax motor system to a solenoid, resulting in faster locking and unlocking of the door. The water level pressure switch was relocated from the console to the top of the pump, thus eliminating the airdome hose. The motor drive system was changed to a sensorless system, thus eliminating the tach sensor in the motor in the harness leading to the motor control board. Heater with thermistor was added to the sump area of the tub to heat the wash water on the MAH7500A model. General Flow Of A Complete Wash Cycle There are several user selections which modify the main wash. Fabric selection impacts tumble pattern. Wash/rinse temperature selection determines water fill temperature. Soil level and quick wash selections determine wash time. The Stain cycle and Presoak options add additional time with a special tumble pattern to the main wash. The stain cycle option also adds rinse time to non-heavy cycles and some warmer rinses. The Quick cycle reduces wash time and only has two rinses. For this cycle, less detergent should be used. 1) The wash cycle is selected and started by user by pressing Start/Pause button 2) The door lock mechanism is verified by locking it and unlocking it. The door is left unlocked. 3) The drain pump will turn on (energized) for a short period of time. 4) The water fill will begin after a delay from the time the pump is turned off. The temperature of the water entering the tub depends on the user selections. 5) After 30 seconds the door will be locked and the machine will tumble at the Handwash wash tumble pattern (less aggressive) until the machine is at wash level. The exception would be if the Cotton/Sturdy is selected or Quick cycle and the washer would have a 7/3 tumble pattern. Note: No permanent locking, tumbling, or spinning shall be done for 30 seconds after any cycle is started or re-started. Filling and draining will be allowed in this initial period. Once filled, the tumble pattern and the total wash time depends on the user selections. A Wash Tumble Flush occurs shortly after the water reaches the wash fill level. A Wash Tumble Flush will have special tumbling speed to ensure the proper mixing of the detergent. 7) Shortly before the end of the wash cycle bleach will be dispensed. 8) The washer will then drain and spin. 9) The washer will fill tumble, drain, and spin repeatedly to rinse the clothes. The number of rinses and spin speeds will be dependent on user selections. Toward the end of the wash and rinse spin, the cold water valve will be turned on for 6 seconds. During the final rinse the machine will perform a tumble flush to clean the machine. 10) A final drain and high speed spin will be performed to extract the water from the clothes. 16010486 (16008373-05) Revised 02/01 Section 1. General Information ©2001 Maytag Appliances Sales Company 1-2