HD-98 Door Operator with OST
Troubleshooting Guide
Printed in USA November, 2011
31
Phasing J2, Motor Leads, and Encoder Connections
For the door operator to function correctly, the door motor armature, the J2 jumper, and the Phase
A and Phase B sensors must be in phase with each other. To reverse motor direction, the wiring is
designed to allow removal or installation of the J2 jumper.
If phasing is not correct:
1. Verify that the black motor lead is connected to DA1 on the door operator card, and the red
motor lead is connected to DA2 on the door operator card. See Figure 11 on page 30.
2. Check for the correct encoder wiring on the DOC2 MTA connector (located on the door operator
card). See Figure 12.
3. Verify that the wiring and connectors are correct in the encoder housing.
4. Set jumpers J1 and J2 on the door operator card.
Figure 12 - Encoder Wiring
White
Black
Red
Green
DOC2 Connector Pin No.
Wire Color
1
Green
2
White
3
Black
4
Red
NOTE:
Pin 1 is on the right side of the connector.