General Pump FOR99SM, User Manual

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GENERAL PUMP
A member of the Interpump Group
Formula 99S
Electric Pressure Washer
TROUBLESHOOTING
PROBLEM CAUSE SOLUTION
Pump running normally but Pump sucking air Check that hoses and fittings
pressure does not achieve are air tight
rated values
Valves worn or dirty Check, clean or replace
Unloader packing worn Check and replace
Nozzle incorrect or worn Check and replace
Worn piston packing Check and replace
Dirty filter Check and clean
Fluctuating pressure Valves worn or stuck Check, clean or replace
Pump sucking air Check that hoses and fittings
are air tight
Worn piston packing Check and replace
Dirty filter Check and clean
Pressure drops after Nozzle worn Check and replace
period of normal use Valves worn, dirty or stuck Check, clean or replace
Unloader packing worn Check, clean or replace
Worn piston packing Check and replace
Dirty filter Check and clean
Pump noisy Pump sucking air Check that hoses and fittings
are air tight
Valves dirty or worn Check, clean or replace
Worn bearings Check and replace if necessary
Water top hot Reduce temperature
Dirty filter Check and clean
Presence of water in oil High humidity in air Check and change oil twice as
often
Piston packing and oil seal worn Check and replace
Water dripping from Piston packing worn Check and replace
under pump The o-rings of piston guide or Check and replace
retainer worn
Oil dripping Oil seal worn Check and replace
The motor does not start The plug not well connected or Check plug, cable and switch
when switched on lack of power supply
When switching on the unit, The main voltage is insufficient, Check that the main power
the motor hums but does lower than the minimum required supply is adequate
not turn on
The pump is stuck or frozen Check by turning the motor
manually as described in
instructions (page 4)
Incorrect extension cord Check and replace
The motor stops Tripped thermal overload due Check that the main voltage
to overheating corresponds to the specifications:
F-122, F-124, X-220, X230, X240 :
switch off the motor and let it cool
a few minutes
X117 & X161: wait a few minutes
before turning on the unit again