Trouble Shooting - Renfert Basic Bedienungsanleitung

7

Trouble shooting

en
Problem
Prebonder – function
check:
No color change after
4 seconds of blasting
on the control pad.
No air and no abrasive.
Only air, no or very
little abrasive.
Only air, no or very
little abrasive.
Unit blasts continu-
ously.
Lamp is not alight.
Compressed air
leaking from the foot
switch.
Foot switch fails to
switch on.
Foot switch hoses
cannot be disconnect-
ed from the unit.
Possible cause
• Operating pressure too low�
• Clogged funnel in the abrasive tank
after prolonged periods of non-use�
• Clogged dosing nozzle�
• Clogging of the filter cartridge due to
humid compressed air�
• Blasting nozzle blocked at the hand-
piece�
• Foot switch connecting lines kinked�
• Tank selection switch in an interme-
diate position�
• The dosage nozzle in the mixing
chamber is blocked due to contami-
nated or moist sand�
• Mixing chamber filter combination
blocked�
• Abrasive contains impurities or is
moist�
• Foot switch connected incorrectly�
• Valve in foot switch is defective�
• Power cord not plugged in�
• Illumination defect�
• Pneumatic hoses reversed�
• No pressure at the compressed air
connection�
• Pneumatic hoses are kinked�
• Push-in connection is not released
(Fig� 2)�
Corrective action
• Check the pressure gauge indicator and adjust the
setting, if necessary�
• Carefully tap the abrasive tank to loosen any blockag-
es caused by a clogged funnel�
• Clean the dosing nozzle in the abrasive tank (see
chapter „6�5 Cleaning the dosing nozzle")
• Short-term measure:
- Open the tank lid�
- Grasp the blue tube�
- Press the foot switch�
This will loosen any contamination from the dosing
nozzle, allowing the sandblasting process to continue�
CAUTION: Since the tank is still contaminated, we
recommend vacuuming out the abrasive material and
replacing it with fresh material, as well as cleaning the
dosing nozzle�
• Replace the filter cartridge (see chapter „6.6 Cleaning
/ replacing the filter cartridge").
• Unscrew the nozzle from the hand-piece and blow it
out�
• With the nozzle removed, blow out the blasting hose
by activating the foot pedal�
• Inspect / correct the connection lines�
• Turn the switch until you feel it click into place�
• Cleaning the dosing nozzle, see chapter „6�5 Cleaning
the dosing nozzle"�
• Change filter cartridge (22 / Fig. 1) (wrench SW14).
• Replace the abrasive�
• Inspect / correct the foot switch connection�
• Replace foot switch�
• Plug the power cord into the wall outlet�
• Change light using the service or see spare part list�
• Reverse the connections�
• Inspect the compressed air lines and / or the compres-
sor�
• Reposition the hoses�
• Press the push-in connection ring on the hose side
firmly while pulling on the hoses.
Please use the release tools supplied (24)�
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