Publication No. 1-07-184
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Pages: 1, 2, 3, 4, 5, 6, 7, 8

Checking resistor board and motor (Fig. 11)

1. Make sure HEATER CONTROL switch is set to OFF.
   
   
2. Make sure that the dipswitch settings are correct as indicated in Figure 11. Use a ballpoint pen to make sure that switches are fully depressed. (Partially depressed switches have been a problem in the past.)
   
   
3. Make sure its transformer is not defective. Refer to instructions above.
   
   
4. Disconnect wires from terminals R, W and B of the resistor board.
   
   
5. Temporarily connect a short jumper wire from terminals r to b. The motor of the actuator should go to high-fire, which indicates that the motor is okay and its particular circuit on the resistor board is okay. Otherwise, either the motor or the resistor board is bad.
   
   
6. Temporarily connect a short jumper wire from terminals W to R. The motor of the actuator should go to low-fire (if it is not already there), which indicates that the motor is okay and its particular circuit on the resistor board is okay. Otherwise, either the motor or the resistor board is defective and should be replaced.
   
   
7. Remove the resistor board.
   
   
8. Connect the two wires from the secondary side of the transformer to terminals T1 and T2 of the circuit board where the resistor board was removed.
   
   
9. Using a short jumper wire, temporarily connect from terminal R to B on the circuit board. If the motor works, the resistor board is defective and should be replaced.