Renfert basic quattro IS Instrucciones Para El Servicio página 15

Problem
Unit blasts
continuously.
Lamp does not go on.
Compressed air leaking
from the foot switch.
Foot switch fails to
switch on.
Quick-stop not
functioning (the nozzle
blasts continuously).
Sound of rushing
air when the unit is
operating.
Foot switch
hoses cannot be
disconnected from the
unit.
Possible cause
• Foot switch connected incorrectly.
• Valve in foot switch is defective.
• Power cord not plugged in.
• Fluorescent tube defective.
• Faulty electronics.
• Fluorescent tube not properly
seated in the socket.
• Pneumatic hoses reversed.
• No pressure at the compressed air
connection.
• Pneumatic hoses are kinked.
• Pneumatic connections are loose.
• Sandblasting hose worn.
• Insuffi cient pressure at the
maintenance unit.
• Outer pressure regulator on the
maintenance unit is altered (fi xing
screw is loosen).
• A small amount of leakage is
always present at the control
valves, thus allowing (a minimum)
of air to escape.
• Push-in connection is not released
(Fig. 2).
Corrective action
• Inspect/correct the foot switch connection.
• Replace foot switch.
• Plug the power cord into the wall outlet.
• Replace the fl uorescent tube (refer to Sec. 5.6).
• Call for service to replace the electronics, or refer to
the spare parts list.
• Refer to Sec. 4.2, "Fluorescent Lamp Installation".
• Reverse the connections.
• Inspect the compressed air lines and/or the
compressor.
• Reposition the hoses.
• Inspect the pneumatic connections for correct seating.
• Replace the sandblasting hose.
• Increase the maintenance unit inlet pressure to at least
5 bar.
• Turn the inner pressure regulator clockwise until stop.
Activate foot pedal and set the pressure regulator on
the maintenance unit at 5 bar (see manometer).
• This is not a fault, but instead is the result of a pressure This is not a fault, but instead is the result of a pressure
release opening which must not be blocked.
• Press the push-in connection ring on the hose side
fi rmly while pulling on the hoses.
Subject to modifi cation.