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Troubleshooting
38. CG OM Models: No Heat With Cycle Selected, Unit Running and Calling
For Heat
120 Volt/60 Hertz/1 Phase and 208-240 Volt/60 Hertz/1 Phase Nonreversing
208-240 Volt/60 Hertz/3 Phase and 460-480 Volt/60 Hertz/3 Phase Reversing and Nonreversing
CG OM Models: No heat with
cycle selected, unit running and
calling for heat
Is there
voltage
at H2-13?
Is there
voltage at H2-6
of the micro
control?
Correct wiring
between H2-5 and
H2-13 on the micro
control.
TMB2165S-a
Replace
micro control.
Is there
voltage at H2-5
of the micro
control?
Check for proper thermistor
operation. Replace micro
control if necessary.
Is there
voltage to input
of the motor
relay?
Correct wiring
between motor relay
and micro.
Is there
voltage to the
output of the
motor
relay?
Replace
motor relay.
No
No
1 Phase
Models: Is
there voltage
to terminal 3
of CR1?
Correct wiring between
CR1 and motor relay.
3 Phase
Models: Is
there voltage
to the input of
fan motor
switch?
Is there
voltage
to terminal 5
of CR1?
No
No
Correct wiring to fan
motor switch.
Is there
voltage out
from the
fan motor
switch?
Replace
fan motor.
Is there
voltage to
terminal 3 of
the motor?
Replace
motor.
Yes
No
Is there
voltage across
the coil
of CR1?
Correct wiring between
CR1 and motor.
No
Does CR1
operate
properly?
Replace
CR1.
No
Yes
No
No
Yes
Yes
Yes
Yes
Yes
No
Yes
No
Yes
Yes
Continued on
next page
Yes
Yes
Содержание ATB50CG
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