Secure power cord connections at wall outlet and sterilizer receptacle.

Unplug unit for 60 seconds; then plug into a dedicated, properly rated circuit.

Secure/repair AC terminals and connections at J28 on main PC board.

Replace power cord / receptacle.

Secure power cord connections at wall outlet and at sterilizer receptacle.

Unplug unit for 60 seconds; then plug into a dedicated, properly rated circuit.

Check supply voltage and contact an electrician to modify voltage, if needed.

Secure/repair AC terminals and connections at J28 on main PC board.

Replace power cord / receptacle.

Check water level in reservoir and add water, if needed, until water reaches appropriate level.

Press STOP button; then initiate a new cycle.

Clean/replace filter.

Clean with Speed-Clean and brush.

Clean/dry water level sensor.

Clean with Speed-Clean and Scotch-Brite pad.

Secure/repair loose or damaged wire connections.

Perform Water Level Sensor Test.

Replace water level sensor.

With door open and door switch engaged, initiate fill cycle to verify if filling.

• If filling, air valve malfunctioning/dirty. Perform Air Valve Test. Clean/replace air valve.

• If not filling, refer to Fill valve malfunctioning/dirty (below).

Inspect fill valve / related tubing for restrictions.

Clean/replace fill valve.

With the sterilizer in Filling mode and door switch engaged, perform Fill Valve Continuity Test.

Clean/replace fill valve.

Verify voltage to Fill Valve.

Perform Fill Valve Supply Voltage Test.

Replace Main PC board.

Clean bottom of the chamber with Speed-Clean and distilled water or water that meets the referenced water purity specifications in User Guide.

Check for blockage in coil and assure weep hole is present and not obstructed.

Clear blockage / replace condensing coil.

Check for debris or blockage in the tubing/fittings to the VistaCool System.

Clean/replace as required.

Check operation of In-Iine Thermal Sensor.

Replace Thermal Regulator Wax Motor or Thermal Sensor.

Check with operator to determine if door was opened during fill mode.

Close door. Cycle will continue where it left off.

Inspect door/dam gaskets for proper installation and any signs of sticking.

Install door/dam gaskets properly.

If new gasket, check if wire ring in gasket is preventing gasket from fully being seated.

Temporarily remove wire ring.

Re-install wire ring after gasket is fully seated.

Check for full movement of door switch lever.

Remove any obstruction.

Install tray rack / tray plate properly.

The 45 degree angled end of tray plate must be positioned upward and to the back of the chamber.

Test switch with the door OPEN and CLOSED.

Perform Door Switch Continuity Test. With door closed, disconnect door switch connectors J13 and J24 of main PC board.

Place meter probes on door switch wires.

If Continuity is not present, replace door switch.

Refer to: Door Switch Continuity Test

Check supply voltage from PC board (line voltage 115 or 230 VAC) for door switch and 3.3 VDC for door dry position switch.

Refer to: Door Switch Supply Voltage Test

Replace Main PC board.

Check with operator to determine if door was opened during Heat Up mode.

Instruments not sterile and need to be reprocessed.

Inspect door/dam gaskets for proper installation and any signs of sticking.

Install door/dam gaskets properly.

If new gasket, check if wire ring in gasket is preventing gasket from fully being seated.

Temporarily remove wire ring.

Re-install wire ring after gasket is fully seated.

Check for full movement of door switch lever.

Remove any obstruction.

Install tray rack / tray plate properly.

The 45 degree angled end of tray plate must be positioned upward and to the back of the chamber.

Check for dirty door pins/latch mechanism.

Clean door pins / latch mechanism. Clean with Spray on Synthetic Dry Protectant (Aerosol).

Inspect latch mechanism for wear/damage.

Replace worn/damaged components.

Remove the door cover and RH side panel.

With the door closed, run the Door Open Test.

Watch for any mechanical issues that may prevent the door from opening.

Refer to:Component Check Test

Replace worn/damaged components.

Remove the door cover and RH side panel.

With the door closed, run the Door Open Test. Watch for any mechanical issues that may prevent the door from opening.

Refer to:Component Check Test

Replace door motor.

Check for binding or buildup of debris in the door hinges.

Clean debris from hinges.

Test switch with the door OPEN and CLOSED.

Perform Door Switch Continuity Test. With door closed, disconnect door switch connectors J13 and J24 of main PC board.

Place meter probes on door switch wires.

If Continuity is not present, replace door switch.

Refer to: Door Switch Continuity Test

Check with operator to determine if door was opened during Sterilization mode.

Instruments not sterile and need to be reprocessed.

Test switch with the door OPEN and CLOSED.

Perform Door Switch Continuity Test.

With door closed, disconnect door switch of main PC board.

Place meter probes on door switch wires.

If Continuity is not present, replace door switch.

Refer to:Door Switch Continuity Test

Check with operator to determine if door was opened during Venting mode.

Instruments not sterile and need to be reprocessed.

Test switch with the door OPEN and CLOSED.

Perform Door Switch Continuity Test.

With door closed, disconnect door switch connectors J13 and J24 of main PC board.

Place meter probes on door switch wires.

If Continuity is not present, replace door switch.

Refer to:Door Switch Continuity Test

Check with operator to determine if door was opened during Door Open mode.

Check the door switch.

Risk of recontaminated instruments.

Inspect door/dam gaskets for proper installation and any signs of sticking.

Install door/dam gaskets properly.

If new gasket, check if wire ring in gasket is preventing gasket from fully being seated.

Temporarily remove wire ring.

Re-install wire ring after gasket is fully seated.

Remove obstructions that prevent the trays from sliding in completely.

Check for dirty door pins/latch mechanism.

Clean door pins / latch mechanism with Spray on Synthetic Dry Protectant (Aerosol).

Tighten latch mechanism.

Inspect latch mechanism for wear/damage.

Replace worn/damaged components.

Remove the door cover and RH side panel.

With the door closed, run the Door Open Test.

Watch for any mechanical issues that may prevent the door from opening.

Refer to:Component Check Test

Replace worn/damaged components.

Remove the door cover and RH side panel.

With the door closed, run the Door Open Test.

Watch for any mechanical issues that may prevent the door from opening.

Refer to:Component Check Test

Replace door motor.

Check for binding or buildup of debris in the door hinges.

Clean debris from hinges.

If debris cannot be cleaned from hinges to remove binding, send unit to Midmark for factory Repair and Return.

Test switch with the door OPEN and CLOSED.

Perform Door Switch Continuity Test.

With door closed, disconnect door switch connectors J13 and J24 of main PC board.

Place meter probes on door switch wires.

If Continuity is not present, replace door switch.

Refer to: Door Switch Continuity Test

Check supply voltage from PC board (line voltage 115 or 230 VAC). Refer to: Door Switch Supply Voltage Test

Replace Main PC board.

Check for full movement of door switch lever.

Remove any obstruction.

Check for chamber pressure when door motor is energized.

Clear any restriction that could prevent chamber pressure from reaching the pressure transducer on PC board.

Check the load size. Refer to User Guide.

Verify that nothing is touching or crowding the temperature sensor.

Reduce load size.

If pressure is above 0.72 psi (5 kPa), check for blockage in the pressure sensor tubing between the PC board and the chamber.

Clear blockage / replace pressure transducer tubing.

Check if operator is running consecutive cycles without completing the DRY cycle.

Complete full cycle.

If the unit skips the Filling mode...

Install tray rack / tray plate properly.

The 45 degree angled end of tray plate must be positioned upward and to the back of the chamber.

Inspect water level sensor for foreign objects. burs, instruments, etc. Remove foreign objects.

Clean/dry water level sensor.

Clean with Speed-Clean and Scotch-Brite pad.

Perform Water Level Sensor Test.

Replace water level sensor.

If the unit completes the Filling mode…

Verify support surface is level.

Remove tray/trays.

Verify water on all sides of chamber is equal.

Verify that nothing is touching or crowding the temperature sensor (e.g., trays, pouches, cassettes).

Check for residue buildup on temperature sensor probe.

Clean with Speed-Clean, distilled water, and abrasive pad.

Verify that nothing is touching or crowding the temperature sensor (e.g., trays, pouches, cassettes).

Perform Temperature Sensor Resistance Test.

Allow sensor to cool to room temperature before testing.

Acceptable range: 1.07 to 1.1K Ω

Refer to: Temperature Sensor Resistance Test

Replace temperature sensor.

Perform Temperature Sensor Supply Voltage Test.

Disconnect sensor harness from J6 on PC board.

On pins 1 and 2, acceptable range is 4.0 to 6.0 VDC.

Refer to: Temperature Sensor Supply Voltage Test

Replace main PC board.

Inspect heating element.

Heating element should lay flat in the bottom of the chamber and be free of any flaking/pitting.

Perform Heating Element Resistance Test (should read 9 to 11 Ω for 115V model and 39 to 42 Ω for 230V model).

Replace heating element.

Perform Heating Element Supply Voltage Test.

With harness attached to leads, should have line voltage in test mode.

Perform Heater Relay PC Board Test (Control and Power)

Control Test: 3.3 VDC - ON, approx. 0VDC - OFF

Power Test: 115/230VAC - ON/approx. 0VAC - OFF

Perform Main PC Board Pressure Transducer Voltage Test.

Acceptable range: 4.0 to 6.0 VDC
Replace Main PC board.

Clean/replace filter.

Clean with Speed-Clean and brush.

Check tubing for restrictions and ensure tubing is angled down and away from the PC Board.

Adjust pressure tubing to correct angle.

If the door motor releases the latch, but the door remains closed, Inspect door spring for damage.

Verify if door is at the vented position. Push in on door with out lifting handle.

Replace door spring

Test facility supply voltage. Voltage must be:

• 115V models: 104 to 127 VAC 50/60 Hz

• 230V models: 207 to 253 VAC 50/60 Hz

Contact an electrician to modify voltage.

Check for loose/worn door and dam gaskets or water leaking around door.

Verify door and dam gaskets are installed properly.

Replace gasket kit 1x year.

Clean/replace gaskets.

Leaking or defective vent valve:

Check for water leaking from condensing coil spout.

Perform Vent Valve Test.

Clean/replace vent valve.

Leaking or defective fill valve:

Check for water leaking back into reservoir through the fill line.

Look for bubbles coming from bottom of reservoir.

Perform Fill Valve Test.

Clean/replace fill valve.

Leaking or defective air valve:

Check for excessive steam coming through condensing coil spout.

During the HEATING and VENTING modes, it is normal for steam to be exhausted through the spout.

Clean/replace air valve.

Leaking or defective Pressure Relief Valve:

Check for water/steam leakage from beneath the rear of the sterilizer.

Perform Pressure Relief Valve Test.

Replace pressure relief valve.

Pressure transducer tubing leaking:

Check for steam leakage at pressure transducer tubing connections.

Secure pressure transducer tubing connections with high temperature cable ties.

Allow unit to warm to room temperature.

Unplug unit for 60 seconds, then plug unit into a dedicated, properly rated circuit. Allow unit to reach room temperature.

Check for residue buildup on temperature sensor probe.

Clean sensor probe with Speed-Clean, distilled water, and abrasive pad.

Verify that nothing is touching or crowding the temperature sensor (e.g., trays, pouches, cassettes).

Check temperature sensor harness connection at J6 on PC board.

Secure/repair loose or damaged connections.

Perform Temperature Sensor Resistance Test.

Allow sensor to cool to room temperature before testing.

Acceptable range: 1.07 to 1.1K Ω

Refer to:Temperature Sensor Resistance Test

Replace temperature sensor.

Perform Temperature Sensor Supply Voltage Test.

Disconnect sensor harness from J12 on PC board.

On pins 1 and 2, acceptable range is 4.0 to 6.0 VDC.

Refer to: Temperature Sensor Supply Voltage Test

Replace main PC board.

Verify weekly and monthly maintenance has been performed by customer. Refer to User Guide.

Perform monthly maintenance.

Verify support surface is level.

Remove tray/trays.

Verify water on all sides of chamber is equal.

Inspect heating element.

Heating element should lay flat in the bottom of the chamber and be free of any flaking/pitting.

Perform Heating Element Resistance Test (should read 9 to 11 Ω for 115V model and 34 to 42 Ω for 230V model).

Replace heating element.

Check for residue buildup on temperature sensor probe.

Clean with Speed-Clean, distilled water, and abrasive pad.

Verify that nothing is touching or crowding the temperature sensor (e.g., trays, pouches, cassettes).

Perform Temperature Sensor Resistance Test.

Allow sensor to cool to room temperature before testing.

Acceptable range: 1.07 to 1.1K Ω

Refer to: Temperature Sensor Resistance Test

Replace temperature sensor.

Perform Temperature Sensor Supply Voltage Test.

Disconnect sensor harness from J6 on PC board.

On pins 1 and 2, acceptable range is 4.0 to 6.0 VDC.

Refer to: Temperature Sensor Supply Voltage Test

Replace main PC board.

Check for loose/worn door and dam gaskets or water leaking around door.

Verify door and dam gaskets are installed properly.

Replace gasket kit 1x year.

Clean/replace gaskets.

Check for voltage flow through harness. Refer to:Fill / Vent Valve Supply Voltage Test

Replace harness.

Leaking or defective vent valve:

Check for water leaking from condensing coil spout. Perform Vent Valve Test.

Clean/replace vent valve.

Leaking or defective fill valve:

Check for water leaking back into reservoir through the fill line.

Look for bubbles coming from bottom of reservoir.

Perform Fill Valve Test.

Clean/replace fill valve.

Leaking or defective air valve:

Check for excessive steam coming through condensing coil spout.

During the HEATING and VENTING modes, it is normal for steam to be exhausted through the spout.

Clean/replace air valve.

Leaking or defective Pressure Relief Valve:

Check for water/steam leakage from beneath the rear of the sterilizer.

Perform Pressure Relief Valve Test.

Replace pressure relief valve.

Pressure transducer tubing leaking:

Check for steam leakage at pressure transducer tubing connections.

Secure pressure transducer tubing connections with high temperature cable ties.

Verify weekly and monthly maintenance has been performed by customer. Refer to User Guide.

Perform monthly maintenance.

Verify support surface is level.

Remove tray/trays.

Verify water on all sides of chamber is equal.

Check for residue buildup on temperature sensor probe.

Clean with Speed-Clean, distilled water, and abrasive pad.

Verify that nothing is touching or crowding the temperature sensor (e.g., trays, pouches, cassettes).

Perform Temperature Sensor Resistance Test.

Allow sensor to cool to room temperature before testing.

Acceptable range: 1.07 to 1.1K Ω

Refer to: Temperature Sensor Resistance Test

Replace temperature sensor.

Perform Temperature Sensor Supply Voltage Test.

Disconnect sensor harness from J6 on PC board.

On pins 1 and 2, acceptable range is 4.0 to 6.0 VDC.

Refer to: Temperature Sensor Supply Voltage Test

Replace main PC board.

Check for loose/worn door and dam gaskets or water leaking around door.

Verify door and dam gaskets are installed properly.

Replace gasket kit 1x year.

Clean/replace gaskets.

Check for voltage flow through harness. Refer to:Fill / Vent Valve Supply Voltage Test

Replace harness.

Leaking or defective vent valve:

Check for water leaking from condensing coil spout. Perform Vent Valve Test.

Clean/replace vent valve.

Leaking or defective fill valve:

Check for water leaking back into reservoir through the fill line.

Look for bubbles coming from bottom of reservoir.

Perform Fill Valve Test.

Clean/replace fill valve.

Leaking or defective air valve:

Check for excessive steam coming through condensing coil spout.

During the HEATING and VENTING modes, it is normal for steam to be exhausted through the spout.

Clean/replace air valve.

Leaking or defective Pressure Relief Valve:

Check for water/steam leakage from beneath the rear of the sterilizer.

Perform Pressure Relief Valve Test.

Replace pressure relief valve.

Pressure transducer tubing leaking:

Check for steam leakage at pressure transducer tubing connections.

Secure pressure transducer tubing connections with high temperature cable ties.

Check all plumbing fitting connections for leakage.

Tighten or replace fittings.

Inspect heating element.

Heating element should lay flat in the bottom of the chamber and be free of any flaking/pitting.

Perform Heating Element Resistance Test (should read 9 to 11 Ωfor 115V model and 34 to 42 Ω for 230V model).

Replace heating element.

Perform Heating Element Supply Voltage Test.

With harness attached to leads, should have line voltage in test mode.

Perform Main PC Board Relay Test.

Check TP1 and TP2 for an acceptable range of 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test.

Acceptable range: 4.0 to 6.0 VDC

Verify weekly and monthly maintenance has been performed by customer. Refer to User Guide.

Perform monthly maintenance.

Verify support surface is level.

Remove tray/trays.

Verify water on all sides of chamber is equal.

Check for residue buildup on temperature sensor probe.

Clean with Speed-Clean, distilled water, and abrasive pad.

Verify that nothing is touching or crowding the temperature sensor (e.g., trays, pouches, cassettes).

Perform Temperature Sensor Resistance Test.

Allow sensor to cool to room temperature before testing.

Acceptable range: 1.07 to 1.1K Ω

Refer to: Temperature Sensor Resistance Test

Replace temperature sensor.

Perform Temperature Sensor Supply Voltage Test.

Disconnect sensor harness from J6 on PC board.

On pins 1 and 2, acceptable range is 4.0 to 6.0 VDC.

Refer to: Temperature Sensor Supply Voltage Test

Replace main PC board.

Check diameter of chamber water level sensor.

Replace if .750 inch diameter.

Check for loose/worn door and dam gaskets or water leaking around door.

Verify door and dam gaskets are installed properly.

Replace gasket kit 1x year.

Clean/replace gaskets.

Check for voltage flow through harness. Refer to:Fill / Vent Valve Supply Voltage Test

Replace harness.

Leaking or defective vent valve:

Check for water leaking from condensing coil spout. Perform Vent Valve Test.

Clean/replace vent valve.

Leaking or defective fill valve:

Check for water leaking back into reservoir through the fill line.

Look for bubbles coming from bottom of reservoir.

Perform Fill Valve Test.

Clean/replace fill valve.

Leaking or defective air valve:

Check for excessive steam coming through condensing coil spout.

During the HEATING and VENTING modes, it is normal for steam to be exhausted through the spout.

Clean/replace air valve.

Leaking or defective Pressure Relief Valve:

Check for water/steam leakage from beneath the rear of the sterilizer.

Perform Pressure Relief Valve Test.

Replace pressure relief valve.

Pressure transducer tubing leaking:

Check for steam leakage at pressure transducer tubing connections.

Secure pressure transducer tubing connections with high temperature cable ties.

Check all plumbing fitting connections for leakage.

Tighten or replace fittings.

Inspect heating element.

Heating element should lay flat in the bottom of the chamber and be free of any flaking/pitting.

Perform Heating Element Resistance Test (should read 9 to 11 Ω for 115V model and 34 to 42 Ω for 230V model).

Replace heating element.

Perform Heating Element Supply Voltage Test.

With harness attached to leads, should have line voltage in test mode.

Perform Main PC Board Relay Test.

Check TP1 and TP2 for an acceptable range of 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test.

Acceptable range: 4.0 to 6.0 VDC

Perform Air Valve Test.

Clean/replace air valve.

Secure power cord connections at wall outlet and sterilizer receptacle.

Unplug unit for 60 seconds; then plug into a dedicated, properly rated circuit.

Check supply voltage.

Contact an electrician to modify voltage.

Check previous error codes. Refer to: Service History Errors Menu

Refer to the error code(s) in this troubleshooting topic.

Clean/replace filter.

Clean with Speed-Clean and brush.

Inspect vent valve.

With the sterilizer in Venting mode, perform Vent Valve Testing.

The valve is normally open and should not be energized during the Venting mode.

Clean/replace vent valve.

Check for residue buildup on temperature sensor probe.

Clean with Speed-Clean, distilled water, and abrasive pad.

Verify that nothing is touching or crowding the temperature sensor (e.g., trays, pouches, cassettes).

Perform Temperature Sensor Resistance Test.

Allow sensor to cool to room temperature before testing.

Acceptable range: 1.07 to 1.1K Ω

Refer to: Temperature Sensor Resistance Test

Replace temperature sensor.

Perform Temperature Sensor Supply Voltage Test.

Disconnect sensor harness from J6 on PC board.

On pins 1 and 2, acceptable range is 4.0 to 6.0 VDC.

Refer to: Temperature Sensor Supply Voltage Test

Replace main PC board.

Check tubing for restrictions and ensure tubing is angled down and away from the PC Board.

Adjust pressure tubing to correct angle.

Perform Heating Element Supply Voltage Test.

With harness attached to leads, should have line voltage in test mode.

Perform Main PC Board Relay Test.

Check TP1 and TP2 for an acceptable range of 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test.

Acceptable range: 4.0 to 6.0 VDC

Perform Air Valve Test.

Clean/replace air valve.

Secure power cord connections at wall outlet and sterilizer receptacle.

Unplug unit for 60 seconds; then plug into a dedicated, properly rated circuit.

Check supply voltage.

Contact an electrician to modify voltage.

Check previous error codes. Refer to: Access Troubleshooting Menu

Refer to the error code(s) in this troubleshooting topic.

Clean/replace filter.

Clean with Speed-Clean and brush.

Inspect vent valve. Clean valve, stretch spring.

With the sterilizer in Venting mode, perform Vent Valve Testing. The valve is normally open and should not be energized during theVenting mode.

Clean/replace vent valve.

Check tubing for restrictions and ensure tubing is angled down and away from the PC Board.

Adjust pressure tubing to correct angle.

Perform Air Valve Test.

Check for excessive steam coming through condensing coil spout.

Clean/replace air valve.

Check the size of the load. Refer to User Guide.

Reduce load size.

Verify support surface is level.

Remove tray/trays.

Verify water on all sides of chamber is equal.

Check for residue buildup on temperature sensor probe.

Clean with Speed-Clean, distilled water, and abrasive pad.

Verify that nothing is touching or crowding the temperature sensor (e.g., trays, pouches, cassettes).

Perform Temperature Sensor Resistance Test.

Allow sensor to cool to room temperature before testing.

Acceptable range: 1.07 to 1.1K Ω

Refer to: Temperature Sensor Resistance Test

Replace temperature sensor.

Perform Temperature Sensor Supply Voltage Test.

Disconnect sensor harness from J6 on PC board.

On pins 1 and 2, acceptable range is 4.0 to 6.0 VDC.

Refer to: Temperature Sensor Supply Voltage Test

Replace main PC board.

Perform Heating Element Supply Voltage Test.

With harness attached to leads, should have line voltage in test mode.

Perform Main PC Board Relay Test.

Check TP1 and TP2 for an acceptable range of 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test.

Acceptable range: 4.0 to 6.0 VDC

Check for debris or blockage in the tubing/fittings to the VistaCool System.

Clean/replace as required.

Perform Air Valve Test.

Clean/replace air valve.

Perform Air Valve Test.

Check for excessive steam coming through condensing coil spout.

Clean/replace air valve.

Check for blockage in coil and ensure weep hole is present and not obstructed.

Clear blockage / replace condensing coil.

Check tubing for restrictions and ensure tubing is angled down and away from the PC Board.

Adjust pressure tubing to correct angle.

Check for debris or blockage in the tubing/fittings to the VistaCool System.

Clean/replace as required.

Check operation of In-Iine Thermal Sensor.

Replace Thermal Regulator Wax Motor or Thermal Sensor.

Install the tank higher than the facility drain.

Perform Heating Element Supply Voltage Test.

With harness attached to leads, should have line voltage in test mode.

Perform Main PC Board Relay Test.

Check TP1 and TP2 for an acceptable range of 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test.

Acceptable range: 4.0 to 6.0 VDC

Verify weekly and monthly maintenance has been performed by customer. Refer to User Guide.

Perform monthly maintenance.

Verify support surface is level.

Remove tray/trays.

Verify water on all sides of chamber is equal.

If the unit is building temperature...

Check for residue buildup on temperature sensor probe.

Clean with Speed-Clean, distilled water, and abrasive pad.

Verify that nothing is touching or crowding the temperature sensor (e.g., trays, pouches, cassettes).

Perform Temperature Sensor Resistance Test.

Allow sensor to cool to room temperature before testing.

Acceptable range: 1.07 to 1.1K Ω

Refer to: Temperature Sensor Resistance Test

Replace temperature sensor.

Perform Temperature Sensor Supply Voltage Test.

Disconnect sensor harness from J6 on PC board.

On pins 1 and 2, acceptable range is 4.0 to 6.0 VDC.

Refer to: Temperature Sensor Supply Voltage Test

Replace main PC board.

Check for loose/worn door and dam gaskets or water leaking around door.

Verify door and dam gaskets are installed properly.

Replace gasket kit 1x year.

Clean/replace gaskets.

Check for voltage flow through harness. Refer to:Fill / Vent Valve Supply Voltage Test

Replace harness.

Leaking or defective vent valve:

Check for water leaking from condensing coil spout. Perform Vent Valve Test.

Clean/replace vent valve.

Leaking or defective fill valve:

Check for water leaking back into reservoir through the fill line.

Look for bubbles coming from bottom of reservoir.

Perform Fill Valve Test.

Clean/replace fill valve.

Leaking or defective air valve:

Check for excessive steam coming through condensing coil spout.

During the HEATING and VENTING modes, it is normal for steam to be exhausted through the spout.

Clean/replace air valve.

Leaking or defective Pressure Relief Valve:

Check for water/steam leakage from beneath the rear of the sterilizer.

Perform Pressure Relief Valve Test.

Replace pressure relief valve.

Pressure transducer tubing leaking:

Check for steam leakage at pressure transducer tubing connections.

Secure pressure transducer tubing connections with high temperature cable ties.

Check all plumbing fitting connections for leakage.

Tighten or replace fittings.

If the unit is not building temperature...

Inspect heating element.

Heating element should lay flat in the bottom of the chamber and be free of any flaking/pitting.

Perform Heating Element Resistance Test (should read 9 to 11 Ω for 115V model and 34 to 42 Ω for 230V model).

Replace heating element.

Inspect heating element wires for corrosion or if disconnected.

Reconnect/replace heating element wires.

Perform Heating Element Supply Voltage Test.

With harness attached to leads, should have line voltage in test mode.

Perform Main PC Board Relay Test.

Check TP1 and TP2 for an acceptable range of 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test.

Acceptable range: 4.0 to 6.0 VDC

Perform Air Valve Test.

Clean/replace air valve.

Check the size of the load.

Refer to User Guide.

Clean/replace filter.

Clean with Speed-Clean and brush.

Verify weekly and monthly maintenance has been performed by customer. Refer to User Guide.

Perform monthly maintenance.

Perform Air Valve Test.

Check for excessive steam coming through condensing coil spout.

Clean/replace air valve.

Check tubing for restrictions and ensure tubing is angled down and away from the PC Board.

Adjust pressure tubing to correct angle.

Perform Heating Element Supply Voltage Test.

With harness attached to leads, should have line voltage in test mode.

Perform Main PC Board Relay Test.

Check TP1 and TP2 for an acceptable range of 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test.

Acceptable range: 4.0 to 6.0 VDC

Check for debris or blockage in the tubing/fittings to the VistaCool System.

Clean/replace as required.

Inspect vent valve. Clean valve, stretch spring.

Perform Vent Valve Testing.

Clean/replace vent valve.

Verify weekly and monthly maintenance has been performed by customer. Refer to User Guide.

Perform monthly maintenance.

Clean/replace filter.

Clean with Speed-Clean and brush.

Inspect vent valve. Clean valve, stretch spring.

With the sterilizer in Venting mode, perform Vent Valve Testing. The valve is normally open and should not be energized during the Venting mode.

Clean/replace vent valve.

Check tubing for restrictions and ensure tubing is angled down and away from the PC Board.

Adjust pressure tubing to correct angle.

Perform Heating Element Supply Voltage Test.

With harness attached to leads, should have line voltage in test mode.

Perform Main PC Board Relay Test.

Check TP1 and TP2 for an acceptable range of 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test.

Acceptable range: 4.0 to 6.0 VDC

Check for debris or blockage in the tubing/fittings to the VistaCool System.

Clean/replace as required.

Check operation of In-Iine Thermal Sensor.

Replace Thermal Regulator Wax Motor or Thermal Sensor.

Check for residue buildup on temperature sensor probe.

Clean with Speed-Clean, distilled water, and abrasive pad.

Perform Temperature Sensor Resistance Test.

Allow sensor to cool to room temperature before testing.

Acceptable range: 1.07 to 1.1K Ω

Refer to: Temperature Sensor Resistance Test

Replace temperature sensor.

Perform Temperature Sensor Supply Voltage Test.

Disconnect sensor harness from J6 on PC board.

On pins 1 and 2, acceptable range is 4.0 to 6.0 VDC.

Refer to: Temperature Sensor Supply Voltage Test

Replace main PC board.

Clean/replace filter.

Clean with Speed-Clean and brush.

Perform Air Valve Test.

Check for excessive steam coming through condensing coil spout.

Clean/replace air valve.

Verify weekly and monthly maintenance has been performed by customer. Refer to User Guide.

Perform monthly maintenance.

Verify if error was preceded with other error codes (e.g., 074A-08[m]C, 0746-06[m]C).

Unplug unit for 60 seconds; then plug into a dedicated, properly rated circuit. Allow unit to cool for 30 minutes.

Verify if unit still overheated.

Unplug unit for 60 seconds; then plug it into a dedicated, properly rated circuit. Allow unit to cool for 30 minutes.

If error code does not reset, perform Thermostat Continuity Test.

Meter Reading — Anything but OL.

Replace thermostats.

Check for residue buildup on temperature sensor probe.

Clean with Speed-Clean, distilled water, and abrasive pad.

Verify that nothing is touching or crowding the temperature sensor (e.g., trays, pouches, cassettes).

Perform Temperature Sensor Resistance Test.

Allow sensor to cool to room temperature before testing.

Acceptable range: 1.07 to 1.1K Ω

Refer to: Temperature Sensor Resistance Test

Replace temperature sensor.

Perform Temperature Sensor Supply Voltage Test.

Disconnect sensor harness from J6 on PC board.

On pins 1 and 2, acceptable range is 4.0 to 6.0 VDC.

Refer to: Temperature Sensor Supply Voltage Test

Replace main PC board.

Check wire connections at high-limit thermostat and at J15 on Main PC Board.

Secure/repair loose or damaged wire connections.

Check for binding or buildup of debris in the door hinges.

Clean debris from hinges.

Test facility supply voltage. Voltage must be:

• 115V models: 104 to 127 VAC 50/60 Hz

• 230V models: 207 to 253 VAC 50/60 Hz

Contact an electrician to modify voltage.

If the unit skips the Filling mode...

Install tray rack / tray plate properly.

The 45 degree angled end of tray plate must be positioned upward and to the back of the chamber.

Check if operator is running consecutive cycles without completing the DRY cycle.

Complete full cycle.

Inspect water level sensor for foreign objects. burs, instruments, etc. Remove foreign objects.

Clean/dry water level sensor.

Clean with Speed-Clean and Scotch-Brite pad.

Perform Water Level Sensor Test.

Replace water level sensor.

If the unit completes the Filling mode…

Verify support surface is level.

Remove tray/trays.

Verify water on all sides of chamber is equal.

Verify that nothing is touching or crowding the temperature sensor (e.g., trays, pouches, cassettes).

Check diameter of chamber water level sensor.

Replace if .750 inch diameter.

Check for loose/worn door and dam gaskets or water leaking around door.

Verify door and dam gaskets are installed properly.

Replace gasket kit 1x year.

Clean/replace gaskets.

Check for voltage flow through harness. Refer to:Fill / Vent Valve Supply Voltage Test

Replace harness.

Leaking or defective vent valve:

Check for water leaking from condensing coil spout. Perform Vent Valve Test.

Clean/replace vent valve.

Leaking or defective fill valve:

Check for water leaking back into reservoir through the fill line.

Look for bubbles coming from bottom of reservoir.

Perform Fill Valve Test.

Clean/replace fill valve.

Leaking or defective air valve:

Check for excessive steam coming through condensing coil spout.

During the HEATING and VENTING modes, it is normal for steam to be exhausted through the spout.

Clean/replace air valve.

Leaking or defective Pressure Relief Valve:

Check for water/steam leakage from beneath the rear of the sterilizer.

Perform Pressure Relief Valve Test.

Replace pressure relief valve.

Pressure transducer tubing leaking:

Check for steam leakage at pressure transducer tubing connections.

Secure pressure transducer tubing connections with high temperature cable ties.

Check all plumbing fitting connections for leakage.

Tighten or replace fittings.

Inspect heating element.

Heating element should lay flat in the bottom of the chamber and be free of any flaking/pitting.

Perform Heating Element Resistance Test (should read 9 to 11 Ω for 115V model and 34 to 42 Ω for 230V model).

Replace heating element.

Perform Heating Element Supply Voltage Test.

With harness attached to leads, should have line voltage in test mode.

Perform Main PC Board Relay Test.

Check TP1 and TP2 for an acceptable range of 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test.

Acceptable range: 4.0 to 6.0 VDC