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INDOOR BLOWER MOTOR (B3) CONTROL
TROUBLESHOOTING (REGAL−BELOIT)
To verify motor operation see steps below and figure 15.
CHECK POWER TO MOTOR
1. Remove J48 (5−pin power plug) from P48 on the motor.
2. With the power on at the air handler, use a test meter to
verify 230V between pins 4 and 5 on J48.
3. Reconnect J48 to P48 on the motor.
APPLY TEST SIGNAL FOR MOTOR OPERATION
1. Remove J49 (4−pin low voltage connector) from P49 on
the motor.
2. Using test jumpers, apply 24V to pins 3 and 4 on P49 on
the motor.
Note: Do not apply 24V to pins 2 and 4 on P49. Doing so
will cause permanent damage to the motor.
3. Motor should run at 75%.
4. Test is complete. Remove jumpers and reconnect
plugs.
Another option is to use the TECMate PRO with the 16 to
4 pin adaptor. The use of the TECMate PRO isolates the
motor from the integrated control. Follow the instructions
provided with the kit. If the motor runs do not replace.
P48 5 PIN
MOTOR with INTEGRATED
CONTROLLER
J48 5 Pin
J49 4 Pin
J48 5 Pin Line Voltage Connector
J49 4 Pin Control Connector
Figure 15. Regal−Beloit
Connectors
CBX40UHV
P49 4 PIN
Blower B3 Harness
Page 19
P48 5 PIN
P48 5 Pin
P49 4 Pin
1
2
3
0
J48 Connector
installed on motor
P49 4 Pin
24v Transformer
Figure 16. Regal−Beloit
P49 4 PIN
4
J48 Connector
5
120v
230v
J49 Connector
Troubleshooting
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