93
Corrections
12.1 Correct any problem with the tap water
inlet
12.2 Replace faulty float switch.
12.3 Replace blown fuse.
12.4 If the pump will not rotate feely then
replace the pump
12.5 Replace the DIG-T2 board
12.6 If approximately 120VAC is present then
the pump is faulty and should be
replaced. If no voltage is present then
replaced the AC-T1 board.
12.7 Clear any clog and / or replace the filter
or valve. Once the pump has cooled it
will start working again.
Possible cause check-up and tests
12.1 Check that the vacuum pump reservoir is
full and tap water will flow in freely.
12.2 The lower float in the vacuum pump
reservoir may be faulty, stopping the
pump.
12.3 Check the fuse at the rear of the unit.
12.4 With the power off, check if the pump is
free to rotate. Do this by inserting a flat
blade screwdriver into the center of the
rear bell housing engaging a slotted
screw that is present there. Apply
moderate force, if the pump will not
rotate then continue increasing force until
the pump rotates freely.
12.5 Check TP5 if the voltage is constantly
<1VDC then the problem in on the DIG-
T2 board.
12.6 If the voltage at TP5 is higher than 4DC,
then remove the JP7 connector and check
the output of JP7-1 on the AC-T1 board
to ground.
12.7 If the pump has over heated the thermal
protector will activate and stop the pump,
this can be due to a clogged or
malfunctioning chamber filter screen,
vacuum pump feed water valve (15) or
chamber vacuum valve (52).
10. TROUBLESHOOTING (cont.)
10.4 In Process Malfunction (cont.)
Symptom
12. Vacuum pump does not
work.
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