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138 Series Sterilizers
Operations and Maintenance Manual
9.0
TROUBLESHOOTING CHART
FAULT
- PROBABLE CAUSE
"
Original
November, 1996
REMEDY
Pilot light does not light
upon electrical
1. No power to unit.
1. Check power line and
fuses.
operation.
2. Defective power switch.
2. Replace power switch.
3. Lamp burned out.
3. Replace lamp.
4. Loose electrical connections.
4. Check wiring for loose
connections or broken wire.
5.
Low water cut out tripped.
5.
Fill with water and reset.
No steam pressure.
1.
Defective pressure control.
1.
Repair or replace control.
Electric operation.
2.
Contactor coil.
Steam pressure high,
1.
low, or erratic.
Electric
heat operation.
Pressure control sticking or
defective.
2.
Pressure gauge error.
3.
Loose electrical connection.
Excessive time to
1.
generate steam.
Electric
heat operation.
Low voltage
2.
Defective heating element
3.
Loose electrical connection
to heaters.
4.
Mineral deposits in jacket.
Chamber does not come
1. Operating valve handle is
up to operating
incorrectly positioned.
temperature or pressure.
2. Steam trap is stuck open.
3.
Screen in the chamber drain
is plugged.
4.
Door leaks.
5.
Defective thermometer.
6.
Pressure gauge error.
7.
Pressure control or pressure
regulator set too low.
2. Replace contactor coil.
1. Repair or replace
pressure control.
2.
Calibrate or replace
pressure gauge.
3.
Check wiring for broken
wire or loose connection.
1.
Check and adjust.
2. Replace heating element.
3. Check wiring to heaters.
4. Clean jacket and heating
elements.
1.
Turn the handle to the
proper position.
2.
Overhaul the steam trap.
3.
Clean the screen.
4.
Tighten door or replace
door gasket.
5.
Replace thermometer.
6.
Calibrate or replace
gauge.
7.
Correct the setting.
M 138.DOC
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