User Guide

MAINTENANCE

The actuator is sealed in oil and requires no maintenance.

Regular maintenance of the total system is recommended to assure sustained, optimum

performance.

TROUBLESHOOTING

Use the following steps to locate malfunctions:

1. Disconnect control wiring.

2. Check for the proper supply voltage to the actuator.

3. The motor should run when power is applied. If it does not run, the actuator is

inoperative and should be replaced.

4. With the actuator motor running:

a. Short the red lead to the yellow lead and observe the position indicator shown in

Figure-5. The actuator should extend.

b. Short the blue lead to the Yellow lead, this should cause the indicator to retract.

c. If the actuator is installed on a damper check the linkage for any damage or

misadjustment which could prevent the actuator from extending. If the mechanical

linkage is inoperative, adjust the linkage or replace the damaged components, as

applicable. If the mechanical linkage moves correctly and freely, the problem lies in

the actuator and it must be replaced.

5. Reconnect control wiring.

6. If applying power directly to the actuator results in correct operation of the actuator, the

actuator and linkage are functional, and the problem lies with the control signal. Repair

or replace the controller, wiring, or thermostat, as applicable.

FIELD REPAIR

None. Replace an inoperative actuator with a functional unit.