Alliance Laundry Systems DTB50CG - MM Models: Motor Does Not Run with Door Closed, Cycle Selected and Start Button Pressed

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Troubleshooting
46. MM Models: Motor Does Not Run With Door Closed, Cycle Selected and
Start Button Pressed
208-240 Volt/60 Hertz/3 Phase Gas and Steam Reversing and Nonreversing; 480 Volt/60 Hertz/
3 Phase Gas Nonreversing; 480 Volt/60 Hertz/3 Phase Steam Reversing
NOTE: Make sure fuse on x1 of transformer is operational (480 Volt/60 Hertz/3 Phase units).
MM Models: Motor does
not run with door closed,
cycle selected and start
button pressed
Is there voltage
to the COM of the
door switch?
TMB2173S
Correct wiring
between door
switch and L1
supply for 208-
240 Volt units.
Check between
door switch and
X1 of transformer
for 480 Volt/3
Phase units.
No
Replace
motor.
Is there 120 VAC
to the N.O. terminal of
the door switch?
Check for proper
operation of door
switch arm and/
or replace door
switch.
Is there 120 VAC
to terminal P2 of the
micro control?
Correct wiring
between door
switch and micro
control.
Is there 120 VAC
to terminal P1 of the
micro control?
Replace
micro control.
Is there 120 VAC
across the coil of
the motor
contactor?
Correct wiring
to the coil
of motor
contactor.
Is there voltage
to terminals L1, L2
and L3 of motor
contactor?
Correct wiring
between
motor
contactor and
terminals L1,
L2, L3 and
TB1.
Is there voltage
at terminals T1, T2
and T3 of the M
contactor?
Replace
motor
contactor.
Is there voltage
to L1, L2 and L3
at motor?
Correct wiring
between
motor and
motor
contactor.
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes