Generac Power Systems 2500 Diagnostic Repair Manual page 5

Section 1 Pump Troubleshooting
Troubleshooting Flow Charts
Problem 1 – No Flow While Pump is Running
TEST 1 – VERIFY
SUPPLY WATER
GOOD
SOURCE
BAD
REPAIR OR
REPLACE SUPPLY
HOSE
Problem 2 – Low Pressure or High Pressure
LOW PRESSURE
Diagnostic Repair Manual
TEST 2 –
CHECK PUMP
GOOD
FOR WATER
FLOW
BAD
REPAIR OR
REPLACE PUMP
VERIFY THROTTLE
IS MOVED TO THE
HIGH "RABBIT"
GOOD
POSITION
-----------------
VERIFY CONTROL
KNOB IS IN THE
MAXIMUM
POSITION
WITH oneWASH
HIGH PRESSURE
TEST 3 – TEST
HIGH PRESSURE
HOSE
BAD
REPLACE HIGH
PRESSURE HOSE
REPLACE NOZZLE
g
TEST 51 –
VERIFY ENGINE
GOOD
RUNNING AT
RATED SPEED
TEST 51 – VERIFY
ENGINE RUNNING
AT RATED SPEED
GOOD
Section 1 Pump Troubleshooting
TEST 4 – CHECK
SPRAY GUN
GOOD
ASSEMBLY
BAD
REPLACE SPRAY
GUN
TEST 5 –
CHECK SPRAY
BAD
NOZZLE
TEST 6 – CHECK
FOR AIR LEAKS
AT PUMP WATER
INLET
GOOD
TEST 5 –
CHECK SPRAY
NOZZLE
GOOD
3