16
TROUBLE SHOOTING CHECKS
PROBLEM
POSSIBLE CAUSE
SOLUTION
Pump will not run.
1. Circuit breaker tripped
on electronic unit.
1. Check for short, low voltage, and
reset breaker.
2. Pump locked up.
2. Clean or rebuild pump if motor is
OK.
3. Damaged wire.
3. Repair damaged wire.
4. Vapor locked.
4. Loosen hose by check valve at
spray shield and bleed air.
Pump runs but will not prime.
1. Air leak in intake.
1. Tighten fittings on intake side.
2. Clogged intake.
2. Clean.
3. Restricted outlet.
3. Check and clean tips.
4. Check valve on outlet
stuck closed.
4. Clean or repair check valve.
5. Dirt inside pump.
5. Replace pump check valve.
Pump does not develop enough
output.
1. Air leaks or clogs on inlet
side.
1. Tighten or clean filter bowl
assembly.
2. Electronic box out of
adjustment.
2. Refer to box adjustment page.
3. Pump worn or dirty.
3. Rebuild pump.
4. Low supply voltage.
(Pump requires 12v
minimum)
4. Check voltage at connection with
voltmeter.
5. Bad gauge.
5. Gauge should read less than 10
PSI when not in use. Also tips
should lose spray pattern below 10
PSI. Check accuracy.
Pump output varies.
1. Clogged or restricted inlet.
1. Clean
2. Worn pump parts.
2. Rebuild pump.
Message light blinks two times
1. Pump or wire harness
shorted.
1. Check harness running to pump
and verify no shorts or problems.
2. Check to see if pump motor is
locked up. Repair or replace.
Message light blinks three times 1. Pump is drawing greater
than 10 amps.
1. Check to see if motor is running
correctly. Repair or replace.
Message light blinks four times
1. Undercurrent coming to
control box.
1. Check all battery connections and
connections running up to control
box.