Electric Actuator Troubleshooting

Thermal Overload protection is active

• Allow actuator to cool. Decrease operating frequency

Capacitor is loose or connected incorrectly

• Check wiring and diagram to correct capacitor connection

Wires, switches or other leads may be disconnected or loose

• Inspect and re-connect

Wires at terminal block loose or disconnected

• Inspect and re-connect

Motor is damaged or otherwise inoperable

• Confirm voltage. Apply power without switches in circuit. Replace motor assembly

Ambient temperature is too low causing inoperability

• Install heater and thermostat

Optional components, control boards incorrectly installed or wiring is loose

• Check installation. Refer to wiring diagram. Replace or reinstall

Supply voltage (power) is applied to both sides of the motor simultaneously

• Check wiring. Make corrections

System wiring has more than one actuator powered from same parallel source

• Apply isolating relays to control circuit

Capacitor has failed

• Replace capacitor

Valve requires too much operating torque

• Check valve torque. Look for obstructions

Motor has failed

• Replace motor

Failed control board components

• Inspect, re-wire or replace boards

Manual override (if supplied) is not properly engaged with gear train

• Manually engage override to the "automatic" position

Damaged or stripped gears in drive train

• Replace gears or gearbox.

Wires at terminal block loose or disconnected

• Check wiring. Make corrections

Limit switch for the reverse direction is engaged with the cam

• Inspect and adjust the cam

Failed control board component

• Inspect, re-wire or replace boards

DC Motor – Polarity is not switching

• Install external switching/relay. See manufacturers wiring diagram

Motor leads or limit switches are wired incorrectly

• Inspect and re-connect

Actuator may be wired for unidirectional operation. Or may be a unidirectional model

• Refer to manufacturers wiring diagram. Re-wire

Actuator rotation is limited by the action of a cam on the limit switch. Cam needs adjustment/setting

• Adjust/set cam

Cam may be loose. Set screw is loose

• Adjust/set cam

Limit switch is not working/contacting

• Replace limit switch

Limit switches may be wired in reverse operation

• Inspect. Re-set

Cam may be loose. Set screw is loose

• Adjust/set cam

Limit switch is not working/contacting

• Replace limit switch

Limit switches may be wired in reverse operation

• Inspect. Re-set

Gasket seal is missing or installed incorrectly

• Replace gasket seal. Dry unit

Water is entering through the conduit entry

• Inspect/Re-seal

Cover was removed or left off during high humidity or rain

• Add a desiccant packet to the enclosure. Dry unit

Cover not attached tightly or with the use of all cover bolts

• Dry unit. Tighten cover

Humid environment

• Add Heater/Thermostat