Troubleshooting Guide
HD-98 Door Operator with OST
32
Vertical Express
Phase A and Phase B Motor Sensor Check
The door microprocessor can correctly detect Phase A and Phase B sensors if the sensors toggle
each time a notch in the encoder disk passes by a sensor.
1. Connect the negative lead of a voltmeter to the DGND test point, and connect the positive lead
to DOC2 pin 2 (Phase B) or DOC2 pin 3 (Phase A). See Figure 11 on page 30.
2. While observing the voltmeter, very slowly rotate the motor.
Notes:
• The door motor must be rotated very slowly for the voltmeter to detect a change.
• If the sensor is responding correctly, the voltmeter will alternate between 0 and 5 VDC.
• Both sensors must operate properly. If either sensor is not functioning, check Fuse F1 on
the door operator card, and check the wiring at the door card and the encoder housing.
DOL and DCL Check
1. Verify that the door microprocessor is detecting the magnetic limits correctly. See Table 2.
2. Hand-crank the door operator, or use the MDO/MDC buttons to move the doors to each limit.
Each respective LED should light.
3. Use the OST, and verify that the door status indicates that the proper limit has been activated.
Note:
If DOL or DCL require adjustment, the doors must be set up again to obtain the new door
travel parameters. See “Door Setup” on page 16.
Table 2 - DOL and DCL Checks
Door Operator I/O Checks
1. Reset the door operator card by pressing the reset button. The WD LED should come ON. See
Figure 11 on page 30 for all steps in this procedure.
Note:
If the OST cannot communicate with the door operator card, see “Door Communications
Troubleshooting” on page 34.
2. If the WD LED is not ON, verify if the P5V LED is ON.
• If P5V LED is ON:
a. Check the door operator card faults with the OST.
b. See “Electronic Door Faults” on page 25.
• If P5V LED is not ON:
a. Check the Fuse F3 on the door operator card.
b. Verify that the P24IN faston and DOC3 are connected to the door card.
c. Verify whether P24 is present in the door operator.
Signal Condition
LED
Condition of LED
DOL
DOL activated (Doors Fully Open)
DOL
ON
DOL not activated (Doors not Fully Open)
DOL
OFF
DCL
DCL activated (Doors Fully Closed)
DCL
ON
DCL not activated (Doors not Fully Closed)
DCL
OFF
