12 Troubleshooting
Contact customer service department or contract partner for any fault or defect found, otherwise
the manufacturer‘s guarantee shall be rendered null and void and the manufacturer released from
any responsibility. If the user performs the repairs, these User Instructions must be adhered to and
carried out in a competent manner. Original Equipment Manufacturer spare parts must be used to
make the repair.
Defect
No. Possible Causes
Remedy
Stem does not move
1.1
• Pneumatic actuators:
Check supply for leaks
Check air pressure (usually 87 psig; 6 bar)
1.2 •
Mounted accessories do not work
• See User Instructions for accessory manufacturer
1.3 •
Pneumatic actuator is defective
• Contact customer service department or contract
partner
1.4 • Excessive tightening of the pack-
ing box
• Loosen packing follower until valve operates properly
NOTICE !
Make sure there are no leaks.
1.5 •
Valve trim worn or stuck
• Contact customer service department or contract
partner
Jerky stem movement
2.1 • Damaged stem
• Contact customer service department or contract
partner
• No auxiliary energy supply
to actuator and accessories
(positioner, air filter regulator,
solenoid valve, limit switch, and/
or special accessories)
Table 6: Troubleshooting
MaxFlo 4 Control Valve FCD VLENIM0064-02-AQ – 09/16
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