Table of Contents
Advertisement
Inverter/Motor
The inverter/motor assembly receives 120 VAC,
which the inverter converts to approximately 340
VDC. The inverter then uses pulse width modulation
(PWM) to supply the motor with an AC varying
frequency to control speed.
Note: There is no location to check inverter output
voltage to the motor. Voltage given is for information
only.
The inverter/motor assembly consists of a motor
and inverter board. A brake resistor is molded into
the underside of the inverter cover and absorbs
energy from the reversing of the motor during the
braking cycle. A Hall effect sensor mounted on the
inverter board measures motor speed (RPM).
The motor and inverter are available only as an
assembly.
WARNING: Do not attempt to remove the inverter
cover to service the board or brake resistor.
Note:
•
There is a nonresettable fuse, located in the
motor harness along the right side of the
cabinet. If the fuse is open, agitate, spin, and
mode shifting will not occur.
•
If the motor speed sensor fails, the motor will
not run.
•
If the motor is not operating, the washer will still
fi ll with water, advance the timer, and drain.
•
If during an agitation cycle, water leaks from the
tub and resets the pressure switch, the inverter
control stops agitation and goes through the
mode shifter spin program to de-energize
the cam and the washer starts to refi ll with
water. The motor will not run again until the
pressure switch is satisfi ed, at which time the
inverter control will run the mode shifter agitate
program.
•
If the mode shifter circuit fails or the coil opens,
the tub will move back and forth with the
agitator during the wash cycle.
To remove the inverter/motor:
1.
Disconnect power.
WARNING: Exposed terminals, inverter board, and
rotating parts may cause injury and/or electrical
shock. To reduce the risk of electrical shock,
disconnect power and allow at least 5 minutes for
capacitors to discharge before servicing motor.
An audible clicking sound will be heard when the
inverter capacitor discharges (inrush relay closing).
2.
Remove the front panel. (See
3.
Disconnect 3 wire harnesses from the motor.
4.
Release the compression tabs that attach the
wire retainer to the front of the platform.
5.
Remove the belt by rolling it off the bottom of
the motor pulley.
6.
Remove the front two
loosen the rear 2 nuts.
Cover
Inverter
Motor
Wire Retainer
Drive
Pully
– 22 –
.)
Front Panel
-in. motor nuts and
3
/
8
Disconnect
Belt
(Continued next page)
Hide quick links:
Advertisement
Table of Contents
