8-1
Valco Cincinnati, Inc.
SECTION 8 - TROUBLESHOOTING
SECTION 8 - TROUBLESHOOTING
SECTION 8 - TROUBLESHOOTING
SECTION 8 - TROUBLESHOOTING
SECTION 8 - TROUBLESHOOTING
Problem
Possible Cause
Possible Solution
1. Pump will not start
1a. Electrical:
-Power input LED out
-No electrical service
-Service
cable
faulty
-Line
fuses
out
-Faulty
3-way
solenoid
-Faulty reed or hall-effect switches
1b. Pneumatic:
-Regulator pressure gauge at zero
-Regulator pressure gauge not at zero;
solenoid valves not operating
1c. Mechanical:
-Pumped solidified fluid
1a. Check line fuse.
Check plant power supply.
Replace PC board/transformer
assembly.
-Check plant power supply.
-Repair or replace service cable.
-Replace line fuses.
-Replace solenoid.
-Test switches. Replace if needed.
1b. Check plant air supply.
Open master air valve.
Turn regulator adjusting knob
clockwise.
-Check air lines to valves.
1c. Check strainers and filters.
-Service the suction and discharge lines.
-Service the check valves.
-Service the pump
.
2. Fluid flow is not
steady.
2a. Suction leakage
2b. One or more check valves not
seating correctly
2c. Diaphragm failure
2a. Test and repair suction
components.
2b. Shut pump down and service the
check valves.
2c. Check 3-way exhaust for
contamination with pumped fluid
to determine which diaphragm has
failed. Replace diaphragm(s).