Section 5: Trouble-Shooting and Repair
MicroBlaster MB1005
Comco Inc.
5-4
Issue Date: September 2003
Common Problems, Causes, and Solutions
Table 5-1: No Air Flow
Problem
Items to Check
Solution
Nothing happens
when the
footswitch is
depressed
(No air is coming
out of the nozzle)
√
Is the electrical power
ON?
Verify that the POWER switch is ON
and the POWER LIGHT is
illuminated.
√
Is the fuse good?
Examine the fuse. Replace if
necessary.
√
Does the gage indicate
pressure in the
system?
Verify that shop air pressure of 80-
200 psig is supplied to the
MicroBlaster.
√
Is the nozzle plugged?
Remove the nozzle and depress the
footswitch. If a blast of abrasive
occurs, the nozzle was plugged. Tap
it on the workbench, back end down.
Discard the nozzle if it remains
plugged.
If plugging recurs, either the tank is
releasing too much powder or the
nozzle is too small for the powder.
√
Is the pinch valve
opening?
The abrasive hose should slide freely
through the abrasive pinch tube when
the footswitch is actuated. If it does
not, the valve is not functioning
properly. See maintenance of the
pinch valve below.
Summary of Contents for MB1005-1
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