Mar 2013
Installation and Maintenance
Part Number: E2K-402-0313, Rev. A
20
Section 8: Troubleshooting
Troubleshooting
Section 8: Troubleshooting
Symptom Probable Cause Corrective Action
Motor will not Run
Blown Control Fuse Check Fuse and Replace as necessary
Open in Control Circuit
Refer to appropriate wiring diagram and check
for continuity
Insulation Resistance Breakdown in
Motor
Perform Megger Test
No Power available to Actuator Tripped Circuit Breaker Reset Circuit Breaker
Handwheel Hard to Turn
Valve Stem improperly Lubricated Lubricate with Grease
Actuator Lubrication has broken
down
Clean out old grease and replace with
recommended lubricant
Valve packing gland too tight Loosen packing gland nuts as necessary
Drive Sleeve Bearing Failure Replace Bearing
Jammed Valve Refer to Valve Maintenance
Valve only opens or closes
partially with motor
Torque Switch Setting too low Check Setting and Reset if necessary
Limit Switch Improperly Set
Check Switch Actuation and recalibrate if
necessary
Torque switch is properly set,
but actuator Torque’s out in
mid-travel, open or closed
direction
Damaged or bent valve stem Refer to Valve Maintenance
Valve packing too tight Refer to Valve Maintenance
Jammed Valve (obstruction in line) Refer to Valve Maintenance
Handwheel will not operate
valve
Handwheel shaft bearing assembly
malfunction
Repair or replace as necessary
Sheared gear key or Stripped Gearing Replace as necessary
PS Shifter Position or Malfunction Replace Gear(s)
Broken Handwheel Shaft Repair or replace as necessary
Broken Valve Stem or Stripped Stem
Nut
Repair or replace as necessary
Motor runs but will not operate
the valve
Motor Bearing Assembly Malfunction Repair or replace as necessary
Sheared gear key (fastener pin) Replace
Stripped Gearing Replace
Broken Valve Stem or Stripped Stem
Nut
Repair or replace as necessary
Moisture in Electrical Enclosure
Leakage through Conduit Entry
Install an approved Seal-off or re-route conduit
to enter Enclosure from the bottom of enclosure
Electrical Enclosure is not properly
sealed
Inspect and replace O-ring if necessary
Space Heater Inoperable Check Circuit continuity for Heater
Gear (Oil) in Electrical Enclo-
sures
Pressure Relief Fitting not installed Install Pressure Relief Fitting
Bad Seal on T/L or G/L Assembly
Replace Stat-O-Seals or O-Rings
Rotate Actuator Mounting
To Next Page
Loading...
