•
The inverter receives 120 VAC through the
RD2 connector (RF Choke). If 120 VAC is not
present, check wall outlet, power cord, and
RF Choke.
•
The RF Choke filters the line voltage and
contains an in-line fuse. It is replaced as an
assembly.
RF Choke
•
Whenever the washer is plugged in, there is 5
VDC at pins 1 and 2 on the dark blue 7-pin
CON2. (See
Testing the Inverter
•
When the washer is turned on by pressing a
membrane pad or touching the LCD screen,
the Power LED on the inverter comes on.
•
When the Power LED is on, the 12-VDC
power supply on the inverter board is
energized and the below listed voltages are on
CON2:
CON2
1
2
3
Pins
Voltages
1 and 2
5 VDC
1 and 3
12 VDC
1 and 4
20 VDC
• After 5 minutes, if there is no additional screen
input, the washer shuts off and the power LED
shuts off. There is no voltage on pins 1 and 3
and 1 and 4 at this time.
•
If the washer operates through a cycle, the
inverter voltages at CON2 will be present until
the lid is opened.
•
If the Power LED is lit and any of the three
voltages (5 VDC, 12 VDC, 20 VDC) at CON2
are not present, the inverter is bad.
Fuse
photo.)
4
5
6
7
Protective Cover
The protective cover must be removed to access
the following components: water valve assembly,
pressure switch, brake resistor, RF choke, and
fuse. The protective cover is held in place by 3
Phillips head screws.
Brake Resistor
•
The brake resistor absorbs energy from the
reversing of the motor during the brake cycle.
•
The brake resistor only operates when the
washer is unplugged or the lid is lifted during a
cycle.
•
Under normal operation, the tub coasts to a
stop at the end of a cycle.
•
The approximate resistance value of the
brake resistor is 70 Ω.
•
If the resistor is shorted, the motor will not
start.
•
If the resistor opens while the motor is
spinning, the inverter board can be damaged.
•
Look for a burnt IC labeled IC300 on the
inverter board. Both the resistor and inverter
board should be replaced if the IC300 is
damaged. (See
To remove the brake resistor:
1. Remove the 2 Phillips head screws that hold
the brake resistor in place.
2. Disconnect the wiring to the brake resistor.
Screw
Disconnect
– 25 –
Protective Cover
photo.)
Testing the Inverter
Brake Resistor
Screw