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Installation, Maintenance and Operation Manual
Troubleshooting Chart
Problem
Cause / Corrective Action
Power to unit, but
• Interrupted power. Check for broken or loose wires, blown fuses or tripped breaker. Check the limit
does not operate
switches to see if they are in the normal operating positions.
• Motor burnout. Check to insure that correct voltage has been applied. Check all wiring against
installation wiring diagrams.
• Malfunctioning valve. Check that valve is operating properly.
Erratic actuator
• Check the ambient temperature rating. The motor is a permanent split capacitor type equipped
performance
with a thermal cut-out switch. Excessive temperatures and cycle frequencies may heat the motor
up and the thermal cut-out turns off the motor.
• Check frequency of operation. This electric actuator has a duty rating of 25% (no more than
15 minutes run time out of every hour).
• Low voltage "brown out". Measure line voltage to insure that actuator is receiving full rated
voltage.
• Motor stall. Check for foreign obstruction in valve. Check for increased torque load due to line
pressure, etc.
Low torque
• Low voltage or current. Check to insure that power supply is within listed specifications.
output
• Overheating. See erratic actuator performance above.
Incorrect travel
• Refer to "Setting Cams For Alignment" in this manual.
or operation
• Circuit not energized for full duration of cycle. Malfunction in control device (relay, switch, etc.);
inspect and correct or replace.
Safety First
In the maintenance and operation of mechanical equipment, safety is a basic factor that must be considered at all times.
By using proper clothing, tools and procedures, serious accidents to you and your fellow workers can be prevented.
After inspecting the actuator, keep the following information for future reference.
Actuator Model Number _______________________________________________________________________________________
Output Torque ________________________________________________________________________________________________
Voltage _______________________________________________________________________________________________________
Serial Number__________________________________________________________________________________________________
Date of Installation ____________________________________________________________________________________________
Location ______________________________________________________________________________________________________
Valve / Line Tag Number _______________________________________________________________________________________
DynaQuip Controls 800-545-3636 www.dynaquip.com
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