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The vacuum pump is not the correct size
for the volume within the vacuum oven
Various connecting flanges and pipes are
not secured or coming loose
The vacuum gauge is damaged.
Unable to maintain
vacuum within
The oven door is not closing well.
chamber
The airproof rubber door seal is aged and
lacks elasticity.
Air release valve and vacuum valve are
not in the correct place.
The electromagnetic valve is damaged.
(Models 6090 & 6210)
There is air leakage in various connect
Heat incurred from the oven can distort
Air Leakage
the shape of the "O" ring causing air
leakage.
Vacuum Degree
Decreased to 0.092
Mpa from 0.1Mpa
Air release valve is not in the right place.
within 24 hours.
Air leakage within the vacuum valve.
The electromagnetic valve cannot be
closed and there is air leakage.
Version 1.0
pipes and flanges
User Manual
The vacuum pumping speed
should not be less than 2 Litres
per second
Check all are securely fitted if
not replace applicable fittings.
Replace the vacuum gauge.
Adjust the door pin distance.
Replace the airproof rubber door
seal
Manually adjust positioning
Replace electromagnetic valve
Check all and replace if required
Screw tight the heater seat
(Located in the back of the inner
bladder)
or replace the "O" ring.
Manually adjust into the correct
position
Replace the vacuum valve
Replace the electromagnetic
valve.
23
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