Troubleshooting - Johnson Controls GH-5000 Manual

Troubleshooting

Symptom Possible Cause
Supply voltage incorrect or missing
Motor does not
run Flow rate set too low
Internal defect
Operating pressure too high
Incorrect mounting position of horizontal
actuator
Motor runs but
valve does not
Stroke setting set below 3 mm
open
Flow direction
Internal defect
Motor does not
Limit switch defective
turn off
Actuator moves Incorrect wiring
through Low
Switch defect
Position
Leakage Flanges, fittings
Dirt on valve seat
Inner leakage
Flow direction
Fault diagnosis
Valve body,
flanges, actuator:
Cracks, holes,
damage, leakage
Danger of explosion
Danger of flying
shrapnel, danger of
poisoning, burns
danger, environmental
Flange fitting not
pollution
tight, leakage
Hot surface Burns danger
Johnson Controls SA/NV - Leuvensesteenweg 248D - B-1800 Vilvoorde - +32(2) 709 40 00 - www.johnsoncontrols.be Johnson Controls SA/NV - Leuvensesteenweg 248D - B-1800 Vilvoorde - +32(2) 709 40 00 - www.johnsoncontrols.be
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Effects
Piping stressed beyond permitted
limits, recoil forces, pressure
surges, valves used as fixed
point, not permitted pressure and
temperature limits
Improper transport, bending
stresses too great, thermal stress
Bolts not tightened diagonally
Wrong operating voltage,
actuator surface becomes hot
Corrective Action
Check switches, fuses, circuit breakers,
and actuator wiring connections (refer to
Table 1)
Turn the 'M' adjustment screw
counterclockwise to increase the flow rate
(refer to chapter Adjustments)
Replace actuator (refer to chapter
Actuator Replacement)
Verify that the maximum operating
pressure is not exceeded (refer to chapter
Specifications)
Turn actuator. Observe mounting positions
as indicated on actuator label
Turn the 'R' or 'S' adjustment screw
counterclockwise to increase the stroke
(refer to chapter Adjustments)
Check flow direction: the flow direction is
indicated by an arrow on the valve body
Replace actuator (refer to chapter
Actuator Replacement)
Replace terminal box (refer to chapter
Repairs and Replacement)
Check wiring (refer to Table 1)
Replace terminal box (refer to chapter
Repairs and Replacement)
Replace seals or screws or replace valve
Replace valve
Check flow direction: the flow direction is
indicated by an arrow on the valve body
Cause
action/Minimising risks
Reduce pressure and
stress, change piping
position, install
compensators, select other
materials. The piping must
meet all applicable
codes/standards (i.e. TRB,
TRR).
Replace valve
Replace valve, ensure that
piping is laid free of stress
or tension
Proper installation in
accordance with these
operating instructions
Replace actuator, check
operating voltage
130 4280 010 E
Remedial