13
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.
Summary of Contents for 442U
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