517792A
9
2 TECHNICAL
OVERVIEW
This Service Manual contains information on the Product Specifications, Diagnostic Mode, Detailed
Fault Codes and the complete disassembly and assembly instructions for the Phase 7 washing
machines.
2.1 Electronics
2.1.1 Motor
Control
Module
The Motor Control microprocessor performs a wide variety of tasks. Primarily it controls the
electronic switching hardware to control the three phase currents in the Smart Drive DC motor.
The micro can accurately control not only the velocity of the motor but also the acceleration. This
accurate control is required to perform all the different agitator profiles, or wash actions, that are
used for caring for clothes. The Motor Control module performs the functions of spin, fill, wash,
drain and spray rinse when commanded to by the Display.
The Motor Control module microprocessor has a wide range of control with great accuracy over
spin speed, agitate action, fill temperature and water level. Having such control insures the wash
cycle selected provides the optimum soil removal combined with appropriate gentleness for the
washing and care of the clothes load.
The Motor Control Modules for the Phase 7 Washers are air-cooled in the same way as the Phase
5, and 6 machines are, and are colored brown, the same color that is used for Phase 6, Series 11
& 12 machines.
This Motor Control Module is
not inter-changeable
with other any other Phase or Series of
machines.
Identification
The physical shape of the Motor Control Module is different to the Phase 6 machines. The Phase
7 module also has a yellow label attached to the top of the housing stating P7CP (Phase 7,
Conventional Pump).
Motor Control Module
Phase 7
Identifier Label
Motor Control Module
Phase 6 – Series 11 & 12
Note: When replacing a Motor Control Module ensure that the pressure tube is clear of any
water droplets before operating the machine on a fill cycle. If the basket is full of water
drain the water then blow down the tube.
