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7.0 Troubleshooting and correction
You have chosen the best quality and therefore deserve the best service. To avoid unnecessary disap-
pointments, you should check the following before contacting the nearest ALTO service organisation.
Fault Possible Cause Remedies
Motor won't start Plug not connected Connect plug.
GFCI not set (if equipped) Reset GFCI.
Defective outlet Try another outlet.
Fuse/breaker blown Change or reset the fuse/breaker. Switch off
any other devices. Try without extension cord.
Motor stops Defective extension cord Remove cord, reset breaker and try again.
Fuse/breaker blown Switch off any other devices. Check that the
voltage is correct.
Overload release activated. Turn start/stop knob off and on, again.
Fuse blows repeatedly Wrong voltage and/or breaker Change to a circuit with correct ampere and
voltage ratings.
Overload release activated Check supply voltage and cord(s).
Pump pressure fluctuating Air in the water hose and/ Allow the machine to run with open spray lance
or pump adjusted to low pressure until the flow is steady.
Inadequate water supply Check that the water supply is adequate for the
machine. Avoid long, thin hoses (min. i.d. ½").
Inlet water screen clogged Clean the screen (see sec. 6.2)
Hoses kinked Straighten the hoses.
High pressure hoses too long Detach high pressure extension hoses and retry
(extension hoses max. 33 ft).
(in suction mode) Read section 5.0.
Suction height too high, water Use cooler water, reduce suction distance and
too hot, or air leak in supply check for poor hose connections.
hose
Pressure low but steady High pressure nozzle worn Replace the nozzle.
Note:
Some accessories normally Dirt in by-pass valve Activate and release the spray handle 5 times,
operate at a lower pressure quickly.
Motor runs but no working Pump/hoses or accessories Let pump/hoses or accessories thaw.
pressure frozen
No water supply Connect or turn on the water.
Inlet water screen clogged Clean the screen (see Sec. 6.2)
Nozzle clogged Clear the nozzle (see Sec. 6.1)
*) Overload release Wrong voltage See section 2.2
activated Extension cord too long Remove the cord or use larger cord.
Nozzle partly obstructed Clear the nozzle (see Sec. 6.1)
Wait until the motor has cooled. (The machine can be restarted by turning te start/stop knob to 0 and back to I).
Should you experience malfunctions other than those mentioned above, please contact ALTO Service for
assistance.