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Troubleshooting
39. OM Models: No Fan Motor Rotation With Cycle Selected and Start
Pressed
208-240 Volt/60 Hertz/3 Phase and 480 Volt/60 Hertz/3 Phase CE Reversing Models; 208-240
Volt/60 Hertz/3 Phase and 460-480 Volt/60 Hertz/3 Phase CG Reversing and CSH Models
OM Models: No fan motor
rotation with cycle selected
and start pressed
Is there
voltage across the
primary of the
transformer?
TMB2166S
Correct wiring to
transformer.
Check fuses.
Is there
24 VAC across
terminals 2 & 3 of
the transformer
secondary?
Replace
transformer.
Is there
voltage to the
COM of the door
switch?
Correct wiring
to door switch.
Check fuse.
Is there
voltage to the
N.O. terminal
of the door
switch?
Check door switch
and switch rod
for proper
operation. Replace
if necessary.
Is there
voltage to H2-8
of micro
control?
Correct wiring
between micro
control and door
switch.
Unit
operational.
Yes
No
No
Yes
No
Yes
No
No
Is there
voltage to H2-7 of
micro control?
Replace
micro control.
Is there
voltage across
the coil of the
M contactor?
Correct the wiring
to the
M contactor.
Is there
voltage to L1, L2
and L3 of the
M contactor?
Correct wiring
between M
contactor and
supply voltage.
Yes
Yes
Is there
voltage toT1, T2
and T3 of the
M contactor?
Replace
M contactor.
Is there
voltage across L1,
L2 and L3 of the
motor?
Correct wiring
between motor
and M contactor.
Yes
No
No
Yes
No
Yes
No
Yes
No
Yes
Содержание ATB50CG
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