Section 7: Troubleshooting - Emerson EIM E796 M2CP Installation And Maintenance Manual

Section 7: Troubleshooting

August 2017
Section 7: Troubleshooting
Motor will not Run
No Power available
Handwheel Hard to Turn
Valve only opens or closes
partially with motor
Torque switch is properly
Torque's out in mid-travel,
open or closed direction
Handwheel will not
21
Symptom
to Actuator
Drive Sleeve Bearing Failure
Limit Switch Improperly Set
Damaged or bent valve stem
set, but actuator
Sheared gear key or Stripped
operate valve
Installation and Maintenance Manual
Probable Cause
Blown Control Fuse
Open in Control Circuit
Insulation Resistance
Breakdown in Motor
Tripped Circuit Breaker
Valve Stem improperly
Lubricated
Actuator Lubrication has
broken down
Valve packing gland
too tight
Jammed Valve
Torque Switch Setting
too low
Valve packing too tight
Jammed Valve
(obstruction in line)
Handwheel shaft bearing
assembly malfunction
Gearing
PS Shifter Position or
Malfunction
Broken Handwheel Shaft
Broken Valve Stem or
Stripped Stem Nut
E2K-402-0817 Rev. 2
Corrective Action
Check Fuse and Replace
as necessary
Refer to appropriate wiring
diagram and check
for continuity
Perform Megger Test
Reset Circuit Breaker
Lubricate with Grease
Clean out old grease and
replace with recommended
lubricant
Loosen packing gland nuts
as necessary
Replace Bearing
Refer to Valve Maintenance
Check Setting and Reset
if necessary
Check Switch Actuation and
recalibrate if necessary
Refer to Valve Maintenance
Refer to Valve Maintenance
Refer to Valve Maintenance
Repair or replace as necessary
Replace as necessary
Replace Gear(s)
Repair or replace as necessary
Repair or replace as necessary
Troubleshooting