Fluid Meter; Fluid Regulator - Graco PCF Instructions - Parts Manual

Troubleshooting

Fluid Meter

Problem
No flow measurement
False measurement
Flow reported is not correct or
inconsistent

Fluid Regulator

Problem
No pressure regulation
No fluid flow
Pressure creeps above setting
Pressure drops below setting
Fluid leaks from spring housing
Chatter
52
Cause
Flow meter pick-up sensor loose
Flow too low
Loose wiring
Damaged flow meter pick-up sensor
Flow meter not calibrated
System not grounded properly
Noisy power source
Flow meter not calibrated
Flow meter is worn
Cause
Damaged diaphragm
Leaking or dirty seat
Damaged valve actuator
Metal chip or contamination
between ball and seat
Damaged diaphragm
Damaged o-ring or improper seal
Damaged or clogged air regulator or
line
Leaking or dirty seat
Large change in inlet pressure
Empty/clogged supply line
Damaged or clogged air regulator or
line
Using valve beyond its rated flow
capacity
Large change in inlet pressure
Loose fluid housing
Damaged diaphragm
Excessive pressure differential be
tween pump and gun
Excessive flow rate
Solution
Tighten flow meter pick-up sensor
Verify flow rate is above minimum
for the flow meter selected
Verify connection from flow meter to
FCM
Replace pick-up sensor
Calibrate flow meter
Verify system ground
Verify clean power supply power to
main enclosure
Calibrate flow meter
Replace flow meter
Solution
Replace diaphragm
Replace cartridge, or clean seat
Replace valve actuator
Replace cartridge, or clean seat
area
Replace diaphragm
Replace the o-ring under the seat
Clear obstruction in line. Service
regulator if necessary
Replace cartridge, or clean seat
Stabilize regulator inlet pressure
Fill/flush supply line
Clear obstruction in line. Service
regulator if necessary
Install valve for each spray gun or
dispensing valve
Stabilize regulator inlet pressure
Tighten the four cap screws
Replace diaphragm
Reduce pump pressure to not more
than 2000 psi (14 MPa, 138 bar)
greater than required gun pressure.
Reduce fluid flow through regulator.
Connect only one spray gun or dis-
pensing valve to each fluid regulator
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