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Safety
Introduction
Trouble Shooting Chart
Symptom
Symptom
The foam pump is operating but not
producing flow.
It takes too long for foam solution to
come out of the discharges.
The pump is losing prime.
Excessive concentrate is being injected
into the solution.
Insufficient concentrate is being
injected into the solution.
The pump runs at full speed whether
the foam pump is on or off.
The foam pump runs at full speed
whenever the foam system is on.
The green light on the OIT does not
illuminate when the foam system is
enabled.
Product Overview
Possible Cause
Possible Cause
The foam pump is not primed.
The concentrate tank is empty.
The strainer is plugged.
The shutoff valve is closed.
The check valve does not open.
The intake valves do not open.
The system has a flush valve or dual tank and is completely flushed after
each use.
Air is entering the concentrate supply hose.
The concentrate supply hose is blocked, collapsed, or too small.
The foam concentrate is too viscous (above 2000 centipoise).
The speed sensor is misaligned or out of adjustment.
The flowmeter is out of calibration.
The system is operating in manual mode.
The foam system is out of calibration.
The foam control module is defective.
The flowmeter is out of calibration.
The foam system is out of calibration.
The foam concentrate is too viscous (above 2000 centipoise).
The controller is malfunctioning.
The power connections are reversed.
There is a bad ground between the controller and chassis.
The cables are not properly connected.
There is a bad ground between the controller and chassis.
Improper voltage.
Installation
Operation
Solution
Solution
Prime the foam pump.
Add concentrate to the tank.
Clean or replace the strainer.
Open the shutoff valve.
Clean or replace the check valve.
Pressurize the suction side of the pump with water to clear any dried foam.
Make sure to prime the system with Class A foam after flushing out Class
B foam. Most Class A foams are less corrosive and do not require the foam
pump to be flushed—turn the system off and just flush the foam manifold.
Only flush the foam pump after using Class B foam.
Repair or replace the deteriorated hose or improperly sealed fitting.
Repair or replace the hose.
Use foam with lower viscosity (below 2000 centipoise) and calibrate the
system for the foam being used.
Check the alignment of the speed sensor.
Calibrate the flowmeter.
To enter or exit manual mode, refer to:
page 52
55
for the digital OIT.
Calibrate the foam system.
Replace the foam control module.
Calibrate the flowmeter.
Calibrate the foam system.
Use foam with lower viscosity (below 2000 centipoise) and calibrate the
system for the foam being used.
Replace the controller.
Replace the controller—reversing the power connections will result in
instant damage.
Repair or replace ground wire or ground connection.
Make sure that all cables are properly connected.
Repair or replace the ground wire or ground connection.
Make sure that the voltage supplied is correct.
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Maintenance
Troubleshooting
"Operating in Normal Mode" on
for the manual OIT and
"Operating in Normal Mode" on page
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