Section 19: Troubleshooting; Troubleshooting - Emerson EIM HQ Series Installation, Operation And Maintenance Manual

Section 19: Troubleshooting

May 2020
Section 19:
The following instructions are offered for the most common difficulties encounter during
installation and start-up.
Table 1.
SYMPTOM
Motor will not run
No power available
to actuator
Handwheel hard to turn
Valve only opens or closes
partially with motor
Torque switch is properly
set, but actuator torques
out in mid-travel, open
or closed direction
Handwheel will not
operate valve
Motor runs but will not
operate valve
20

Troubleshooting

PROBABLE CAUSE
Open in control circuit
Insulation resistance break-
down 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 Check setting and reset if necessary
Limit switch improperly set
Damaged or bent valve stem
Valve packing too tight
Jammed valve
(obstruction in line)
Stripped gearing
Clutch shifter position or
malfunction
Broken handwheel shaft
Broken valve stem
Stripped gearing
Clutch shifter position or
malfunction
Broken handwheel shaft
Installation, Operation and Maintenance Manual
CORRECTIVE ACTION
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
Refer to valve maintenance
Check setting and reset if necessary
Refer to valve maintenance
Refer to valve maintenance
Refer to valve maintenance
Replace as necessary
Move shifter, or replace as necessary
Replace as necessary
Repair or replace as necessary
Replace as necessary
Move shifter, or replace as necessary
Replace as necessary
VCIOM-15204-EN Rev. 1
Troubleshooting