Motor Run Relay - Microprocessor Models - Maytag LAT2300 Service Manual

relays. The smaller terminals are used
for the 24 VDC wires and the larger ter-
minals are used for the 120 VAC wires.
The Fast and Slow relays (single-pole,
single-throw) are used to control the
speed of the motor. These relays carry
the same part number and are
i
nter-
changeable. The Fast relay is ener-
gized to provide regular speed and
Slow relay is energized to provide slow
speed. NOTE: The speed of the motor
is determined by the cycle selected.
The following table defines the relay on
and off states as voltages (at BB3 for
AC & AT AA3 for DC), measured with
, respect to the relay outputs.
Washer Relay
On Off
Hot BB1
OV 120VAC
Cold BBS
OV 120VAC
Slow Motor (AA4) 20VOC
OV
min.
Fast Motor (AA1) 20VOC OV
min.
Reversing Motor (AAS) 20VOC OV
min.
The Reversing relay (double-pole,
double-throw) is used to change the
direction of the motor for spin. The
relay is de-energized during the agi-
tation cycle and is energized during the
spin cycle.
Motor Run Relay - Microprocessor
Models
The motor run relay is the relay
mounted on the left of the two relays. It
is a single pote, single throw type and
when energized, completes the L 1 side
of the power supply from the Lid Switch
to the Drive Motor. Both the Lid Switch
and the Run Relay must be closed for
power to reach the Drive Motor.
t - - - - (
5
ELECTR I CAL S CH EMA TIC
TEST PROCEDURE
The relay coil is energized by 24 VDC
(volts direct current) which is fed from
the microprocessor board. Once the
relay coil is energized, the relay switch
will close, completing the circuit.
Because of the low resistance readings
found on the relay coil, a continuity
check across the coil terminals with an
ohmmeter is recommended. A closed
circuit (continuity) should be seen. If an
open circuit (no continuity) is seen, the
relay should be replaced.
To Check Run Relay:
Note: To check relay unplug washer
power cord from power supply.
1. Remove wires from run relay.
2. Measure resistance of relay coil
across small terminals (YLlBK to
GY). Resistance should be approxi-
mately 480 ohms.
An infinite reading indicates an open
coil and requires relay replacement.
16001145 SECTION 3. WASHER - SERVICE PROCEDURES
3-10
©1994 Maytag Corporation