TUTTNAUER™ TROUBLESHOOTING GUIDE


Tuttnauer Manual Sterilizer Troubleshooting
For Models Ending in M, MK & MKV

Symptom Cause Solutions
Power-On Light does not illuminate Wall outlet or plug Verify power at outlet. Make sure power cord is plugged in at the wall and at the machine.
- Power Switch Turn Power Switch ON. Replace if necessary
- Circuit Breaker Reset breaker. Check for short circuit (see Electrical Troubleshooting Guide). If no short is found, replace Circuit Breaker
- Power Lamp Replace Power Light.
- Open Circuit Check for loose or disconnected wires. Replace Wire Harness, if necessary
Heat Lamp OFF in STE cycle Timer Check that Timer is turned ON. Timer must be advanced past 10 minutes to activate.
- Heat Lamp If unit has heat and pressure, check and/or replace Heat Lamp. If unit has no heat, check for open circuit (see Electrical Troubleshooting Guide).
- Micro-Switch 1 (MSW1) is defective or it is stuck in the down position. Check MSW1. Adjust or replace as necessary
- Control Thermostat Set Control Thermostat to 212°F or higher. Adjust or replace Control Thermostat as necessary.
Heat lamp is ON; No heat or pressure Heaters Measure Heater for proper resistance (see Table Csee Electrical Troubleshooting Guide). Check for broken/disconnected wiring. Replace if necessary
Heat lamp is ON in STE cycle, but with low heat and slow pressure build- Steam Leak Check for audible/visual steam leak at Door Gasket, Door Bellows, Safety Valve, Air Jet Valve, and Condensation Coil. If there are air bubbles in reservoir, check Multi-Purpose Valve. Repair or replace faulty part(s) as necessary
- Heaters Measure Heaters for proper resistance, (see C Table Electrical Troubleshooting Guide). Check for broken or disconnected wiring.
- Control Thermostat Set Control Thermostat to 212°F or higher. Adjust or replace Control Thermostat as necessary.
- Excess water in Chamber Check water level. Check level of unit per Installation Procedure, see Figure 1, of Tuttnauer Maintenance Guide.
- Pressure Gauge Check and/or replace Pressure Gauge
Safety Valve opens Control Thermostat Reset Control Thermostat to proper value or, if necessary, replace it
- Safety Valve If Safety Valve opens below rated cracking pressure, replace it.
Unit overheats, Heat Light stays ON Water level Check fill operation and water level, see Figure 1, of Tuttnauer Maintenance Guide
- Water or steam leak Check for audible/visual steam leak at Door Gasket, Door Bellows, Safety Valve, Air Jet Valve, and Condensation Coil. If there are air bubbles in reservoir, check Multi-Purpose Valve. Repair or replace part(s) as necessary.
Unit overheats, Power and Heat Lights go out Low water level (Over Temp Safety Switch) Check for water or steam leak. Replace Over Temp Safety Switch if necessary
Heat lamp remains ON when Timer is at 0 or Timer will not advance Timer Timer must be advanced past 10 minutes to activate. Check Timer operation and replace if necessary.
Timer Bell does not sound Timer Timer must be advanced past 10 minutes to activate. Check Timer operation and replace if necessary.
Water enters Chamber after unit is exhausted and the door is closed Condensation Coil Water level is above open end or there is a hole in the Condensation Coil creating a vacuum. Reduce water level to 1" below Safety Valve and open end of Condensation Coil must be above water level. Replace Condensation Coil if necessary.
- Multi-Purpose Valve (if not stuck open) Remove, disassemble, clean and rebuild, or replace Multi-Purpose Valve (see MULTI-PURPOSE VALVE, page 9).
The machine is leaking at the door Door Loose Make sure the door is tightened
- Door Gasket Replace The Door Gasket
When running a cycle, the exhaust stage takes a very long time.
If you are running a "Liquids" program this is normal.
- Switch Setting Check the switch on the back of the machine.

Make sure that it is set to "Exh. to Reservoir" if you are not using the drain connection


Display Errors

Display Warning
Cause Solutions
Low Vacuum Leakage Check the door for leakage and replace the door gasket, if necessary.
- Pump Make sure the pump is running. Check the pump fuse and replace it if necessary
- Exh Make sure the tube on the Exh From Pump connection is not blocked.
- - Make sure the Red Silencer is not submerged in water, and is positioned equal or below the "Exh. from pump" connection
Low Water Water Level Electrode Clean the Water Level Electrode inside the vessel.
- Level Make Sure The Unit is Level
Click Here For Leveling Procedure
Low Temp Air Trap Check the Air Trap inside the water reservoir.
- Level Make Sure The Unit is Level
Click Here For Leveling Procedure
Low Pres Air Trap Check the Air Trap inside the water reservoir
- Level Make Sure The Unit is Level
Click Here For Leveling Procedure
- Door Gasket Check the door for leakage and replace the Door Gasket if necessary
High Temp Water Level Electrode Clean the Water Level Electrode inside the vessel
- Level Make Sure The Unit is Level
Click Here For Leveling Procedure
High Pres Water Level Electrode Clean the Water Level Electrode inside the vessel
- Level Make Sure The Unit is Level
Click Here For Leveling Procedure



This product was added to our catalog on Saturday 05 April, 2008.



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