Determine if there are loose fasteners.
(a) Tighten the screws that secure the water valve cap to the control
(b) Tighten the tie bolt that secures the blocks together.
If this corrects the problem, no further action is required.
(d) If there is still air in the water, proceed to (4) below.
Determine if there is cross-leakage under the water valve diaphragm.
(a) Remove the cap from the top of the control block.
(b) Inspect the diaphragm and surfaces of the block and cap carefully.
(c) If you observe no defects, install a new water valve diaphragm.
Reassemble and test the valve.
(d) If the test is abnormal, replace any defective parts. Reassemble
and test the unit.
TROUBLESHOOT AN AIR SUBSYSTEM MALFUNCTION
When you have an audible leak when no one is using the foot control, the air
subsystem is probably malfunctioning. After verifying that all tubing is properly
connected, use the following procedures to find the cause of the malfunction, if
necessary. Refer to figure 5-5.
a. Determine if the mounting screws are loose.
Turn the foot control face down.
Tighten the two Phillips-head screws at the center of the baseplate.
If the leakage stops, no further action is required.
If the leakage does not stop, proceed with the next step.