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10 TROUBLESHOOTING
10.1 Preliminary Check
Before performing any troubleshooting operation and before removing
the autoclave’s cover, check the following:
1. Electrical power: Verify that:
a. Power supply is 1ph/208 VAC for model
2540 and 3ph/208 VAC for model 3870.
b. It has an earth wire.
2. Mineral free water: ½” connection. Water pressure, after the
pressure reducer (as indicated on the pressure
reducer’s gauge) must be 7-30 psi.
3. City water: ½” connection. Water pressure, after the
pressure reducer (as indicated on the pressure
reducer’s gauge) must be 15-58 psi.
4. Drain: The drain tube must be connected directly to
the sewage. It must be straight and not
elevated to any degree. The drain opening
should be within 1 foot of the rear of the unit
and no higher than 16” above the floor.
In order to locate any malfunctioning component perform the “in-out
test” this test enables the technician to activate most of the components
and test the analog and digital inputs, This enables the technician to
verify whether the problem is caused by an end item, by the control
system or by any other reason.
Before any operation or test on the autoclave perform a visual check
for loose parts or for signs of over-heating and burnt components.
10.1.1 Manual Valves
There are four (4) manual control valves (see piping diagram)
and the technician must verify that they are open as instructed
below.
There is one manual control valve on the incoming mineral
free water line.
There are two valves on the feed water line and there is one
valve that acts as a bypass to the steam trap.
The three incoming waterline valves are used to regulate flow
and should be opened 2 –3 full turns. One controls feed water
flow to the vacuum pump reservoir, one controls flow to the
mineral free water reservoir and one controls flow of feed
water for cooling the exhaust drain. (Since the majority of
drains are made of PVC pipe the exhaust temp needs to
remain below 140ºF. the cooling water valve is used to
maintain drain temperatures well below 140ºF.
The steam trap bypass valve is used to control steam escaping
from the chamber and should be open ¼ - ½ turn. Restricting
the flow of steam too much or too little will result in a system
failure.
To set or check the valves, close them fully make an indicator
mark if one is not present and open the proper number of
turns.
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