107
Corrections
34.1 If a direct short is found in the SSR then
replace it.
34.2 If an open is found then replace the SSR.
34.3.1 If terminal 3 does not read
between +3.5 and +5 VDC then
check if the Power Supply is
properly supplying these voltages.
34.3.2 If terminal 4 does not read the
correct voltage then, unplug the
unit and remove the wire on
terminal 4. Turn the power back
on and recheck terminal 4. If the
reading is still not correct then
replace the SSR. If the reading is
correct then check continuity
between the terminal 4 wire and
the appropriate connector:
(unplug the unit when taking this
reading)
Possible cause check-up and tests
34.1 Unplug the unit & remove the Outer
Cabinet Label then remove the four wires
connected to the SSR. Using an
ohmmeter, check for a short circuit
between terminals 3 & 4 and 1& 2 and
3&1 and 4&2 and 3 & 2 and 4 & 1.
Make sure there are no direct shorts.
34.2 Next, using an ohmmeter, check for an
open between terminals 1 & 2, be sure to
reverse the meter leads and check in the
opposite direction. Repeat the procedure
for terminals 3 & 4.
34.3 Plug the unit in & Turn the unit on Make
sure the autoclave is sitting idle, no cycle
is running. If necessary abort any cycle
that may not have been completed. The
heaters will automatically be on when the
unit is turned on. Press the PROGRAM
KEY to display the date and time, this
will turn the heaters off. Take a DC
voltage reading from terminal 3 on the
SSR to ground. With the heaters in the
OFF mode there should be a voltage
reading between +3.5 and +5 VDC.
Repeat this procedure with terminal 4
and you should have the same reading.
Reading between +3.5 and +5 VDC
indicates that the SSR is not turned on.
10. TROUBLESHOOTING (cont.)
10.4 In Process Malfunction (cont.)
Symptom
34. Testing the Solid State
Relay
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