Constant Torque Motor
Troubleshoo!ng
Does motor run?
Ensure power is applied to the unit and Seven
Segment LED’s are ON with no ac!ve error codes
Turn fan to ON at thermostat and verify that COF and
TP1 alternately appear on the seven segment display
YES
Motor & IFC are
good
Verify voltage(s)
listed
NO
If voltage is not present, remove 6 pin
connector from IFC and re-check. If voltage is
present, verify voltage at panel connectors and
at motor. If voltage is present at the motor,
replace motor
Con!nuous FAN on this unit is limited to TAP 1
only. No field adjustment can be made. If
troubleshoo!ng other speed taps, use the
method as outlined below using the voltages
listed for the tap number being used
BK W2 W1 R G B/C Y2 Y1 O
6 Pin CTM Motor
Connector
Tap 1 - Low Speed
Tap 2
Tap 3
Tap 4
Tap 5 - High Speed
Common
6 Pin CTM
Connector
3
2 1
C
5 4
CONTROL
CONNECTION
POWE
R
CONNECTION
L G N
3
2 1
C
5 4
CONTROL
CONNECTION
POWER
CONNECTION
L G N
VOLTS A.C.
VOLTS A.C.
~ 8 VDC
120 VAC
6-Pin low volltage
CTM motor connector plug
1. Remove the 6-pin low voltage
connector from the IFC
2. Apply 24 VAC to Common tap (Blue)
and any speed tap on the CTM motor
6-pin plug. The motor should run.
9 Tap CTM Voltages
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