20
TROUBLESHOOTING
Condition Probable Cause Solution
• Pump runs but pressure • Air leak in inlet plumbing or pump • Check that hoses and fittings are air tight.
does not achieve rated sucking air.
values. • Pressure gauge inoperative. • Check and replace gauge.
• Valves worn or dirty. • Clean or replace-See
“MAINT. OF THE PUMP”
• Unloader valve seat faulty or worn. • Clean or replace-See “MAINT. OF THE PUMP”
• Nozzle setting incorrect or worn. • Check nozzle adjustment or replace orifice
in Vari-Nozzle, see parts list for correct size.
• Worn seals in pump. • Replace-See
“MAINT. OF THE PUMP”
• Unloader not at maximum setting. • Turn adjustment knob to maximum setting.
• Insufficient time to fill supply line. • Allow time to fill supply line:
2.0 gpm = 30.8 seconds,
3.0 gpm = 20.3 seconds.
• Fluctuating or pulsing • Valves worn, dirty or stuck. • Clean or replace-
pressure. See
“MAINT. OF THE PUMP”-VALVES
• Pump sucking air. • Check that hoses and fittings are air tight.
• Worn seals. • Replace-See “MAINT. OF THE PUMP”-SEALS
• Pressure drops after period • Nozzle worn. • Replace.
of normal use. • Valves worn, dirty or stuck. • Clean or replace-
See
“MAINT. OF THE PUMP”-VALVES
• Unloader valve seat worn or dirty. • Clean or replace-See “MAINT. OF THE
PUMP”-UNLOADER
• Worn seals. • Replace-See “MAINT. OF THE PUMP”-SEALS
• Pump noise. • Pump sucking air. • Check that hoses and fittings are air tight.
• Valves worn or dirty. • Clean or replace-
See
“MAINT. OF THE PUMP”-SEALS
• Worn bearings. • Consult factory.
• Water too hot. • Reduce temperature-check seals
and o-rings.
• Presence of water in oil. • High humidity in air. • Change oil as needed.
• Seals and oil seals worn. • Replace-See “MAINT. OF THE PUMP”-SEALS
• Water dripping from under • Seals worn. • Replace-See “MAINT. OF THE PUMP”-SEALS
pump or case. • O-rings worn. • Replace-See “MAINT. OF THE PUMP”-SEALS
• Loose connection. • Check all connections.
• Thermo-Valve discharging. • Excessive fluid temperature from
prolonged by-pass. Operate with cool fluid
and if continued discharge, check pump
seals and o-rings.
• Oil dripping. • Oil seal worn. • Consult factory.
• Motor does not start when • Plug not well connected or lack of • Check plug, cable and switch for snug
switched on. power supply. connection.
• GFCI tripped. • Reset GFCI-See
“GROUND-FAULT
CIRCUIT-INTERRUPTER”
• Circuit breaker or fuse in house • Disconnect other appliances on same
tripped. circuit and reset circuit breaker.
• Motor stopped while spraying. • Totally release trigger for 5 seconds and
squeeze again.
• When switching on the • The main voltage is insufficient, lower • Check that the main power supply is
unit, the motor hums than the minimum required. adequate: 15AMP (2X1000), 20 AMP
but does not run. (2X1500, 3X1000).
• The pump is stuck or frozen. • Consult factory.
• Incorrect extension cord. • See
“EXTENSION CORDS”
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