Instruction Manual

All information herein is proprietary and confidential and may not be copied or reproduced without the expressed written consent of
BRAY INTERNATIONAL, Inc. The technical data herein is for general information only. Product suitability should be based solely upon customer’s
detailed knowledge and experience with their application.
S98 O & M : 37
Series 98 Operation & Maintenance
Trouble shooting potential problems
FAULT POSSIBLE CAUSES RECOMMENDED ACTIONS
Erratic Movement Inconsistent supply /dirty operating media/
clogged filters
Check media supply pressure and line filters, correct as
necessary. Refer to Introduction section in this manual for
operating media requirements.
Inadequate Lubrication Disassemble and lubricate. Refer to Maintenance section in this
manual for lubricant specs.
Worn /damaged Parts Disassemble and inspect. Replace worn/damaged parts. Refer
to Disassembly, Service & Reassembly of Modules section in this
manual.
Seal set due to long periods of inactivity Operate for 5-10 cycles and check. Replace seals if not resolved.
Refer to the procedures under Pressure Module section in this
manual, for replacement and testing procedures.
Valve problem- bearing/seal friction, damaged
parts
Refer to valve manufacturer’s IOM.
Incomplete Stroke Stoppers set incorrectly Check and adjust.
Foreign object left inside during maintenance Disassemble, inspect for damages and correct.
Manual override in wrong position Check and fully retract manual override devices for proper
automatic operation.
Valve problem- Restriction, friction,incorrect
valve stopper
Refer to valve manufacturer’s IOM .
Loss of power Supply pressure inadequate Check and correct supply pressure to operating pressure.
Inadequate flow Check flow control devices and adjust for suffiecient flow.
Repair any kinked tubing.
Tubing or exhaust vents blocked Check and clean the vents ,silencers and tubing
Pressure Module seals leaking Check leaks and replace seals.Refer to the procedures under
Pressure Module section in this manual, for replacement and
testing procedures.
Defective Accessories/Inadequate capacity Refer to accessory manufacturer’s OM manual and specs.
Valve jammed or requires higher torque Refer to valve manufacturer’s IOM.
No response to
energizing
Altered schematic Check if the control circuit is as per the supplied schematic.
Correct the circuit, if altered.
Solenoid valve /positioner/control elements mal-
function
Check /Refer to accessory manufacturer’s OM manual for
troubleshooting.
Disengaged piston rod/ broken connection/
jammed mechanism
Refer to Maintenance section for module/actuator disassembly
procedures to disassemble appropriate module for inspection.
Valve problem- jammed Refer to valve manufacturer’s IOM.
Fails to go to the
failsafe position
Altered schematics Check if the control circuit is as per the supplied schematic.
Correct the circuit, if altered.
Control component malfunction/failure Check and replace
Choked exhaust silencer/foreign object blocking
exhaust line
Remove vent to confirm normal operation. Clean/replace
exhaust silencer
Spring rod disengaged/connection broken. Refer to Maintenance section for module/actuator disassembly
procecures to disassemble appropriate module for inspection
Valve problem- jammed Refer to valve manufacturer’s IOM.