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Safety
Introduction
Troubleshooting Guide
Symptom
Symptom
Possible Cause
Possible Cause
The compressor is working, but no
The auto-sync switch is not in the correct
air is supplied to the discharges.
position.
The air discharge solenoid is not
working.
There is a leak in the air solenoid or in
the tubing between the solenoid and
discharge.
The air check valve is defective or
mounted backwards.
The trim valve is out of adjustment.
The air lines were plumbed prior to the
discharge valve seal.
The compressor speed (rpm) is too low.
The air supply is insufficient.
The air lines are the wrong size.
The throttle valve is closed (if the system
uses a throttle valve to control air flow).
The system is functional, but the
• The gauge is malfunctioning.
pressure gauge is not indicating
• The air line has detached or is leaking.
the correct pressure.
• The air line is restricted.
Air pressure is produced in fixed
• The balance valve is malfunctioning.
mode, but no pressure is produced
• Water is not being supplied to the
in auto mode.
balance valve.
The balance trim valve is closed.
Air pressure is produced in auto
The balance valve is malfunctioning.
mode, but it remains at the fixed
pressure.
The balance trim valve is closed.
The air discharge pressure is too
The red auto-sync tube has detached or
high.
is leaking.
The trim valve is out of adjustment—the
air inlet trim valve is too far open, the
balance trim valve is closed.
The PMC valve is out of adjustment.
Product Overview
Installation
Solution
Solution
• Make sure that the air pressure produced in unload mode is between 25 to 40 psi.
• Make sure that the air pressure produced in auto mode is 50 psi or more and changes with water pressure.
• Make sure that the air pressure produced in fixed mode is between 145 to 150 psi.
Verify that the air discharge solenoid has power and is operational —repair or replace the solenoid.
Repair or replace the leaking components.
Replace the air check valve or mount it correctly.
Adjust the trim valve.
Relocate air lines to the discharge side of discharge valve.
Increase the compressor speed (rpm).
Replace the lines with the correct size.
Make sure that the throttle valve is open and properly adjusted.
• Check the components for air leaks.
• Reattach, repair, or replace the malfunctioning components.
• Make sure that the air line is not kinked or obstructed—clear any obstructions.
• Make sure that the balance valve tubing is installed properly.
• Make sure that the balance valve tubing is not leaking, kinked, or obstructed—clear any obstructions.
Make sure that the trim valve is open and properly adjusted.
• Make sure that the balance valve tubing is installed properly.
• Make sure that the balance valve tubing is not leaking, kinked, or obstructed—clear any obstructions.
• Make sure that the trim valve is open and properly adjusted.
• If the trim valve is already open, make sure that it is not obstructed—clear any obstructions.
Reattach, repair, or replace the tubing.
Adjust the trim valve.
Adjust the system to approximately 150 psi in fixed mode.
Operation
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Maintenance
Troubleshooting
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