Page 19
CBX40UHV
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.
MOTOR with INTEGRATED
CONTROLLER
J48 5 Pin Line Voltage Connector
J49 4 Pin Control Connector
J48 5 Pin
J49 4 Pin
P49 4 PIN
P48 5 PIN
Figure 15. Regal−Beloit Blower B3 Harness
Connectors
P48 5 Pin
P49 4 Pin
J48 Connector
installed on motor
P49 4 Pin
120v
0
230v
5
4
3
2
1
J48 Connector
24v Transformer
J49 Connector
P49 4 PIN
P48 5 PIN
Figure 16. Regal−Beloit Troubleshooting
To Next Page
Loading...
Need help?
General
