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HP400-IOM Rev. 0 7/20
THIS INFORMATION IS SUBJECT TO THE CONTROLS OF THE EXPORT ADMINISTRATION REGULATIONS (EAR). THIS INFORMATION SHALL NOT BE PROVIDED TO
NON-US PERSONS OR TRANSFERRED BY ANY MEANS TO ANY LOCATION OUTSIDE THE UNITED STATES CONTRARY TO THE REQUIREMENTS OF THE EAR.
TROUBLESHOOTING
When performing necessary corrective action in the following operations, refer to the
MAINTENANCE
section for the necessary
procedure.
PROBLEM:
The regulated pressure continues to increase after lock-up and without change in the control mechanism position.
POSSIBLE CAUSE:
The main valve seat needs replacement; follow maintenance procedure and regulator assembly.
PROBLEM:
Continuous leakage through the bonnet with the outlet pressure on the regulator.
POSSIBLE CAUSE:
Sensor O-ring is worn, leaking, and needs to be replaced.
PROBLEM:
Regulated pressure drops off sharply when the flow is within the regulator’s capabilities.
POSSIBLE CAUSE:
Clogged inlet screen. Remove the old filter with a sharp instrument and press in a new filter using the blunt end of an instrument.
PROBLEM:
Outlet Pressure will not adjust high enough.
POSSIBLE CAUSE:
Supply pressure is too low and needs to be increased.
Maximum pressure limit (handwheel) is improperly adjusted and needs to be re-adjusted, follow maintenance procedure “setting the
maximum output limit.”
An ITT Company
