M9/M11 Sterilizer Pressure Sensor Error Codes: C633 to C677 Troubleshooting

WARNING

To prevent risk of shock always disconnect power before removing covers or performing any service procedure.

WARNING

Some procedures require power to be connected with covers removed. Line voltage is present. Use extreme caution to prevent electric shock.

When a code ends in “0”, it means the unit had a power interruption during operating conditions. The operator may have unplugged the unit when a previous error code was displayed.

Display / Symptom Cause Check Action

C633: HEATUP MODE PRESSURE LOW

ITEMS NOT STERILE UNPLUG / REPLUG UNIT

Only if the 1st air purge has not occurred within 30 minutes from the start of heat up.

Maintenance not performed.

Verify weekly and monthly maintenance has been performed by customer.

Refer to User Guide.

Perform monthly maintenance.

Sterilizer is unlevel. Remove tray / trays.

Verify support surface is level.

Place sterilizer on a level support surface.

Verify water on all sides of chamber are equal.

If the unit is building temperature

Temperature sensor malfunctioning.

Check for residue build up on temperature sensor probe.

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

Check that nothing is touching or crowding the temperature sensor.

Example: trays, pouches, cassettes, etc.

Reposition items so nothing touches or crowds the temperature sensor.

Perform Temperature Sensor Testing. Allow sensor to cool to room temperature before testing.

Acceptable range 1.07-1.1K 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 - 6.0 VDC. Refer to: Temperature Sensor Supply Voltage Test

Replace Main PC board.

Pressure Leaks.

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.

Replacement fill / vent valve solenoid requires rectifier harness for DC coil.

Install rectifier harness.

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

Replace rectifier 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 thru 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 thru condensing coil spout.

During the HEAT and VENT modes, it is normal for steam to be exhausted thru 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....

Heating element malfunctioning.

Inspect heating element. Heating element should lay flat in the bottom of the chamber.

Heating element should be free of any flaking / pitting. Perform Heating Element Resistance Test (should read 9-11 Ω)

Replace heating element.

Inspect heating element wires for corrosion or if disconnected.

Reconnect / Replace heating element wires.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test. Acceptable range: 4.0 to 6.0 VDC.
Display / Symptom Cause Check Action

C634: STERILIZE MODE PRESSURE LOW

ITEMS NOT STERILE UNPLUG / REPLUG UNIT

Pressure Leaks.

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 air valve. Check for excessive steam coming thru condensing coil spout.

During the HEAT and VENT modes, it is normal for steam to be exhausted thru 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.

Replacement fill / vent valve solenoid requires rectifier harness for DC coil.

Install rectifier harness.

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

Replace rectifier 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 thru the fill line.

Look for bubbles coming from bottom of reservoir. Perform Fill Valve Test

Clean / Replace fill valve.

Check all plumbing fitting connections for leakage.

Tighten or replace fittings.

Temperature sensor malfunctioning.

Check for residue build up on temperature sensor probe.

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

Check that nothing is touching or crowding the temperature sensor.

Example: trays, pouches, cassettes, etc.

Reposition items so nothing touches or crowds the temperature sensor.

Perform Temperature Sensor Resistance Test. Allow sensor to cool to room temperature before testing.

Acceptable range 1.07-1.1K 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 - 6.0 VDC. Refer to: Temperature Sensor Supply Voltage Test

Replace Main PC board.

Sterilizer is unlevel. Remove tray / trays.

Verify support surface is level.

Place sterilizer on a level support surface.

Verify water on all sides of chamber are equal.

Facility voltage too high / low.

Test facility supply voltage. Voltage must be

115V models: 104 - 127 VAC 50/60 Hz

230V models: 207 - 253 VAC 50/60 Hz

Contact an electrician to modify voltage.
Display / Symptom Cause Check Action

C642: FILL MODE PRESSURE HIGH

ITEMS NOT STERILE PUSH STOP TO RESTART

Defective Air valve.

Leaking or defective air valve. Perform Air Valve Test

Check for excessive steam coming thru condensing coil spout.

Clean / Replace air valve.

Restricted Condensing Coil.

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

Clear blockage / replace condensing coil.

Pressure tubing at incorrect angle.

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

Adjust pressure tubing to correct angle.

Blockage or malfunction in VistaCool System if used.

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 weep hole in the manifold lid and threaded area on the tank of the VistaCool System.

Drill hole in VistaCool manifold and threaded area on the tank.

The 90 degree elbow fitting(s) are not installed.

Check if the 90 degree elbow fitting(s) are installed on the tank.

Install the 90 degree elbow fitting(s).

Tank is lower than the facility drain.

Check if tank is higher than the facility drain.

Install the tank higher than the facility drain.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test. Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test. Acceptable range: 4.0 to 6.0 VDC.
models -040 Thru -043
Display / Symptom Cause Check Action

C643: HEATUP MODE

PRESSURE HIGH

ITEMS NOT STERILE

PUSH STOP TO RESTART

 Sterilizer overloaded. Check the size of the load. Refer to User Guide Reduce load size.
Chamber filter clogged. Check if chamber filter is clogged. Clean / Replace filter. Clean with Speed-Clean and brush.
Maintenance not performed. Verify weekly and monthly maintenance has been performed by customer. Refer to User Guide. Perform monthly maintenance.
Defective Air valve.

Leaking or defective air valve. Perform: Air Valve Test

Check for excessive steam coming thru condensing coil spout.

 Clean / Replace air valve.
Pressure tubing at incorrect angle. Check tubing for restrictions and ensure tubing is angled down and away from the PC Board. Adjust pressure tubing to correct angle.
PC Board malfunctioning. Perform: Heating Element Supply Voltage Test. With harness attached to leads should have line voltage in test mode. Replace Main PC board.

Perform: Main PC Board Relay Test

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

Perform Main PC Board Pressure Transducer Voltage Test

Acceptable range: 4.0 to 6.0 VDC
Blockage or malfunction in VistaCool System if used. 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 weep hole in the manifold lid and threaded area on the tank of the VistaCool System. Drill hole in VistaCool manifold and threaded area on the tank.
Display / Symptom Cause Check Action

C644: STERILIZE MODE PRESSURE HIGH

ITEMS NOT STERILE PUSH STOP TO RESTART

Sterilizer Overloaded.

Check the load size. Refer to User Guide.

Reduce load size.

Temperature sensor malfunctioning.

Check for residue build up on temperature sensor probe.

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

Check that nothing is touching or crowding the temperature sensor.

Example: trays, pouches, cassettes, etc.

Reposition items so nothing touches or crowds the temperature sensor.

Perform Temperature Sensor Resistance Test. Allow sensor to cool to room temperature before testing.

Acceptable range 1.07-1.1K 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 - 6.0 VDC. Refer to: Temperature Sensor Supply Voltage Test

Replace Main PC board.

Pressure tubing at incorrect angle.

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

Adjust pressure tubing to correct angle.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test. Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test. Acceptable range: 4.0 to 6.0 VDC.
Display / Symptom Cause Check Action

C645: VENT MODE PRESSURE HIGH

ITEMS NOT STERILE PUSH STOP TO RESTART

Absolute pressure inside chamber is greater than 0.7 psig (5 kPag) for longer than 10 minutes.

i.e. Vent mode is not complete.

Maintenance not performed.

Verify weekly and monthly maintenance has been performed by customer.

Refer to User Guide.

Perform monthly maintenance.

Chamber filter clogged.

Check if chamber filter is clogged.

Clean / Replace filter.

Clean with Speed-Clean and brush.

Vent valve.

Inspect vent valve.

Clean valve, stretch spring

Clean / Replace vent valve.

With the sterilizer in the Vent Mode

Perform Vent Valve Testing. The valve is normally open, and should not be energized during the Vent mode.

Pressure tubing at incorrect angle.

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

Adjust pressure tubing to correct angle.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test. Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test. Acceptable range: 4.0 to 6.0 VDC.

Blockage or malfunction in VistaCool System if used.

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 weep hole in the manifold lid and threaded area on the tank of the VistaCool System.

Drill hole in VistaCool manifold and threaded area on the tank.

The 90 degree elbow fitting(s) are not installed.

Check if the 90 degree elbow fitting(s) are installed on the tank.

Install the 90 degree elbow fitting(s).

Tank is lower than the facility drain.

Check if tank is higher than the facility drain.

Install the tank higher than the facility drain.
Display / Symptom Cause Check Action

C646: DOOR TO OPEN PRESSURE HIGH

PUSH STOP TO RESTART

Gauge pressure inside chamber is equal to or greater than 0.7 psi (5 kPa) during DOOR OPEN mode.

 Chamber filter clogged. Check if chamber filter is clogged. Clean / Replace filter. Clean with Speed-Clean and brush.
Air valve.

Leaking or defective air valve. Perform Air Valve Test

Check for excessive steam coming thru condensing coil spout.

 Clean / Replace air valve.
Vent valve. Inspect vent valve. Clean / Replace vent valve.

With the sterilizer in the Vent Mode

Perform Vent Valve Testing The valve is normally open, and should not be energized during the Vent mode.
Display / Symptom Cause Check Action

C647: DRY MODE PRESSURE HIGH

PUSH STOP TO RESTART

Gauge pressure inside chamber is equal to or greater than 2.18 psi (15 kPa) during DRY mode, or 0.7 psi (5 kPa) during DOOR mode.

If Door did not open before DRY mode

Door spring missing / damaged.

 If the door motor releases the latch, but the door remains closed, Inspect door spring for damage. Replace door springs.
Verify if door is at the vented position. Push in on door with out lifting handle.

Verify the QTY of door springs. M11- QTY 2, M9-QTY 1

Verify door springs are at a 45 degree angle.

 Place door spring at a 45 degree angle.

Chamber filter clogged.

Check if chamber filter is clogged.

Clean / Replace filter.

Clean with Speed-Clean and brush.

Door / Dam gasket(s).

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.

Trays not pushed in properly.

Be sure trays slide in properly.

Remove obstructions that prevent the trays from sliding in completely.

Door pins / latch binding.

With door open, door handle should move Up / Down freely.

Clean door pins / latch mechanism.

Clean with Synthetic Dry Protectant - Aerosol / Spray on.

Inspect latch mechanism for wear / damage.

Replace worn / damaged components.

Door motor system / latch “hanging up”.

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: Service Diagnostics (I/O Test)

Replace worn / damaged components.

Verify Door Motor is angled as close to PC board as possible.

Adjust door motor angle.

Place in Service Diagnostics Mode. With the door closed, run the Door Open Test. Watch for any mechanical issues that may prevent full rotation of door motor cam.

Refer to: Service Diagnostics

Replace door motor.

Check if the connecting rod is installed in the proper location on the door motor cam. 9 for M9, 11 for M11.

Install connecting rod in the proper 9 or 11 location on the door motor cam.
If Door did open before DRY mode....

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.
Perform Main PC Board Pressure Transducer Voltage Test Acceptable range: 4.0 to 6.0 VDC.
Display / Symptom Cause Check Action

C660: POWER UP MODE PRESSURE HARDWARE

UNPLUG / REPLUG UNIT

Pressure A/D converter reports an average value outside the limits for normal operation during POWER UP mode.

Power interruption.

Unit lost power for a few seconds during Fill, Heat-Up, or Sterilization Mode.

Check power cord connections. Power interruption could be due to an electrical storm, brown out, etc.

Unplug unit for 60 seconds, then plug

unit into a dedicated, properly rated circuit.

Check supply voltage.

Contact an electrician to modify voltage.

The operator may have unplugged

the unit when a previous error code was displayed.

Check previous error codes. Refer to: Service Diagnostics (Recall Errors)

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

Temperature sensor malfunctioning.

Check for residue build up on temperature sensor probe.

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

Check that nothing is touching or crowding the temperature sensor.

Example: trays, pouches, cassettes, etc.

Reposition items so nothing touches or crowds the temperature sensor.

Perform Temperature Sensor Resistance Test. Allow sensor to cool to room temperature before testing.

Acceptable range 1.07-1.1K 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 - 6.0 VDC.

Refer to: Temperature Sensor Supply Voltage Test

Replace Main PC board.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test. Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test. Acceptable range: 4.0 to 6.0 VDC.
Display / Symptom Cause Check Action

C661: SELECT MODE PRESSURE HARDWARE

UNPLUG / REPLUG UNIT

Pressure A/D converter reports an average value outside the limits for normal operation during SELECT mode.

Temperature sensor malfunctioning.

Check for residue build up on temperature sensor probe.

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

Check that nothing is touching or crowding the temperature sensor.

Example: trays, pouches, cassettes, etc.

Reposition items so nothing touches or crowds the temperature sensor.

Perform Temperature Sensor Resistance Test. Allow sensor to cool to room temperature before testing.

Acceptable range 1.07-1.1K 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 - 6.0 VDC. Refer to: Temperature Sensor Supply Voltage Test

Replace Main PC board.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test. Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test. Acceptable range: 4.0 to 6.0 VDC.
Display / Symptom Cause Check Action

C662: FILL MODE PRESSURE HARDWARE

UNPLUG / REPLUG UNIT

Pressure A/D converter reports an average value outside the limits for normal operation during

FILL mode

Temperature sensor malfunctioning.

Check for residue build up on temperature sensor probe.

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

Check that nothing is touching or crowding the temperature sensor.

Example: trays, pouches, cassettes, etc.

Reposition items so nothing touches or crowds the temperature sensor.

Perform Temperature Sensor Resistance Test. Allow sensor to cool to room temperature before testing.

Acceptable range 1.07-1.1K 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 - 6.0 VDC. Refer to: Temperature Sensor Supply Voltage Test

Replace Main PC board.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test. Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test. Acceptable range: 4.0 to 6.0 VDC.
Display / Symptom Cause Check Action

C663: HEATUP MODE PRESSURE HARDWARE

UNPLUG / REPLUG UNIT

Pressure A/D converter reports an average value outside the limits for normal operation during HEAT UP mode.

Temperature sensor malfunctioning.

Check for residue build up on temperature sensor probe.

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

Check that nothing is touching or crowding the temperature sensor.

Example: trays, pouches, cassettes, etc.

Reposition items so nothing touches or crowds the temperature sensor.

Perform Temperature Sensor Resistance Test. Allow sensor to cool to room temperature before testing.

Acceptable range 1.07-1.1K 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 - 6.0 VDC. Refer to: Temperature Sensor Supply Voltage Test

Replace Main PC board.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test. Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test. Acceptable range: 4.0 to 6.0 VDC.
Display / Symptom Cause Check Action

C664: STERILIZE MODE PRESSURE HARDWARE

UNPLUG / REPLUG UNIT

Pressure A/D converter reports an average value outside the limits for normal operation during STERILIZE mode.

Temperature sensor malfunctioning.

Check for residue build up on temperature sensor probe.

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

Check that nothing is touching or crowding the temperature sensor.

Example: trays, pouches, cassettes, etc.

Reposition items so nothing touches or crowds the temperature sensor.

Perform Temperature Sensor Resistance Test. Allow sensor to cool to room temperature before testing.

Acceptable range 1.07-1.1K 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 - 6.0 VDC. Refer to: Temperature Sensor Supply Voltage Test

Replace Main PC board.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test. Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test. Acceptable range: 4.0 to 6.0 VDC.
Display / Symptom Cause Check Action

C665: VENT MODE PRESSURE HARDWARE

UNPLUG / REPLUG UNIT

Pressure A/D converter reports an average value outside the limits for normal operation during VENT mode.

Chamber filter clogged.

Check if chamber filter is clogged.

Clean / Replace filter.

Clean with Speed-Clean and brush

Vent valve.

Inspect vent valve.

Clean / Replace vent valve.

With the sterilizer in the Vent Mode

Perform Vent Valve Testing. The valve is normally open, and should not be energized during the Vent mode.

Temperature sensor malfunctioning.

Check for residue build up on temperature sensor probe.

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

Check that nothing is touching or crowding the temperature sensor.

Example: trays, pouches, cassettes, etc.

Reposition items so nothing touches or crowds the temperature sensor.

Perform Temperature Sensor Resistance Test. Allow sensor to cool to room temperature before testing.

Acceptable range 1.07-1.1K 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 - 6.0 VDC. Refer to: Temperature Sensor Supply Voltage Test

Replace Main PC board.

Pressure tubing at incorrect angle.

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

Adjust pressure tubing to correct angle.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test. Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test. Acceptable range: 4.0 to 6.0 VDC.
Display / Symptom Cause Check Action

C667: DRY MODE PRESSURE HARDWARE

UNPLUG / REPLUG UNIT

Pressure A/D converter reports an average value outside the limits for normal operation during

DRY mode.

Temperature sensor malfunctioning.

Check for residue build up on temperature sensor probe.

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

Check that nothing is touching or crowding the temperature sensor.

Example: trays, pouches, cassettes, etc.

Reposition items so nothing touches or crowds the temperature sensor.

Perform Temperature Sensor Resistance Test. Allow sensor to cool to room temperature before testing.

Acceptable range 1.07-1.1K 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 - 6.0 VDC. Refer to: Temperature Sensor Supply Voltage Test

Replace Main PC board.

Pressure tubing at incorrect angle.

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

Adjust pressure tubing to correct angle.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test. Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test. Acceptable range: 4.0 to 6.0 VDC.

Facility voltage too high / low.

Test facility supply voltage. Voltage must be:

115V models: 104 - 127 VAC 50/60 Hz

230V models: 207 - 253 VAC 50/60 Hz

Contact an electrician to modify voltage.
Display / Symptom Cause Check Action

C670: POWER UP MODE PRESSURE OVERLIM

UNPLUG / REPLUG UNIT

Gauge pressure inside chamber is greater than 40 psig (275.79kPa) during POWER UP mode.

Power interruption

Unit lost power for a few seconds during Fill, Heat-Up, or Sterilization Mode.

Check power cord connections. Power interruption could be due to an electrical storm, brown out, etc.

Unplug unit for 60 seconds, then plug

unit into a dedicated, properly rated circuit.

Check supply voltage.

Contact an electrician to modify voltage.

The operator may have unplugged the unit when a previous error code was displayed.

Check previous error codes.

Refer to:Service Diagnostics (Recall Errors)

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

Vent valve.

Inspect vent valve.

Clean valve, stretch spring

Clean / Replace vent valve.

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

Pressure tubing at incorrect angle.

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

Adjust pressure tubing to correct angle.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test. Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test. Acceptable range: 4.0 to 6.0 VDC.
Display / Symptom Cause Check Action

C671: SELECT MODE PRESSURE OVERLIM

UNPLUG / REPLUG UNIT

Gauge pressure inside chamber is greater than 40 psig (275.79 kPa) during SELECT mode.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test. With harness attached to leads should have line voltage in test mode.

Replace Main PC board.

Perform Main PC Board Relay Test. Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test. Acceptable range: 4.0 to 6.0 VDC.
Display / Symptom Cause Check Action

C672: FILL MODE PRESSURE OVERLIM

UNPLUG / REPLUG UNIT

Gauge pressure inside chamber is greater than 40 psig (275.79 kPa) during FILL mode.

Defective Air valve.

Leaking or defective air valve. Perform Air Valve Test

Check for excessive steam coming thru condensing coil spout.

Clean / Replace air valve.

Pressure tubing at incorrect angle.

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

Adjust pressure tubing to correct angle.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test. Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test. Acceptable range: 4.0 to 6.0 VDC.
Display / Symptom Cause Check Action

C673: HEATUP MODE PRESSURE OVERLIM

ITEMS NOT STERILE UNPLUG / REPLUG UNIT

Gauge pressure inside chamber is greater than 40 psig (275.79 kPa) during HEAT UP mode.

Sterilizer overloaded.

Check the size of the load. Refer to User Guide

Reduce load size.

Sterilizer is unlevel. Remove tray / trays.

Verify support surface is level.

Place sterilizer on a level support surface.

Verify water on all sides of chamber are equal.

Temperature sensor malfunctioning.

Check for residue build up on temperature sensor probe.

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

Check that nothing is touching or crowding the temperature sensor.

Example: trays, pouches, cassettes, etc.

Reposition items so nothing touches or crowds the temperature sensor.

Perform Temperature Sensor Resistance Test. Allow sensor to cool to room temperature before testing.

Acceptable range 1.07-1.1K 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 - 6.0 VDC. Refer to:Temperature Sensor Supply Voltage Test

Replace Main PC board.

Defective Air valve.

Leaking or defective air valve. Perform Air Valve Test

Check for excessive steam coming thru condensing coil spout.

Clean / Replace air valve.

Pressure tubing at incorrect angle.

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

Adjust pressure tubing to correct angle.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test. Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test. Acceptable range: 4.0 to 6.0 VDC.

Blockage or malfunction in VistaCool System if used.

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 weep hole in the manifold lid and threaded area on the tank of the VistaCool System.

Drill hole in VistaCool manifold and threaded area on the tank.
Display / Symptom Cause Check Action

C674: STERILIZE MODE PRESSURE OVERLIM

ITEMS NOT STERILE UNPLUG / REPLUG UNIT

Gauge pressure inside chamber is greater than 40 psig (275.79 kPa) during STERILIZE mode.

Sterilizer overloaded.

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

Reduce load size.

Sterilizer is unlevel. Remove tray / trays.

Verify support surface is level.

Place sterilizer on a level support surface.

Verify water on all sides of chamber are equal.

Temperature sensor malfunctioning.

Check for residue build up on temperature sensor probe.

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

Check that nothing is touching or crowding the temperature sensor.

Example: trays, pouches, cassettes, etc.

Reposition items so nothing touches or crowds the temperature sensor.

Perform Temperature Sensor Resistance Test. Allow sensor to cool to room temperature before testing.

Acceptable range 1.07-1.1K 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 - 6.0 VDC. Refer to:Temperature SensorSupply Voltage Test

Replace Main PC board.

Pressure tubing at incorrect angle.

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

Adjust pressure tubing to correct angle.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test. Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test Acceptable range: 4.0 to 6.0 VDC.

Blockage or malfunction in VistaCool System if used.

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 weep hole in the manifold lid and threaded area on the tank of the VistaCool System.

Drill hole in VistaCool manifold and threaded area on the tank.
Display / Symptom Cause Check Action

C675: VENT MODE PRESSURE OVERLIM

ITEMS NOT STERILE UNPLUG / REPLUG UNIT

Gauge pressure inside chamber is greater than 40 psig (275.79 kPa) during VENT mode.

Chamber filter clogged.

Check if chamber filter is clogged.

Clean / Replace filter.

Clean with Speed-Clean and brush.

Vent valve.

Inspect vent valve.

Clean valve, stretch spring.

Clean / Replace vent valve.

With the sterilizer in the Vent Mode

Perform Vent Valve Testing The valve is normally open, and should not be energized during the Vent mode.

Pressure tubing at incorrect angle.

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

Adjust pressure tubing to correct angle.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test. Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test. Acceptable range: 4.0 to 6.0 VDC.

Blockage or malfunction in VistaCool System if used.

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 weep hole in the manifold lid and threaded area on the tank of the VistaCool System.

Drill hole in VistaCool manifold and threaded area on the tank.
Display / Symptom Cause Check Action

C677: DRY MODE PRESSURE OVERLIM

ITEMS NOT STERILE UNPLUG / REPLUG UNIT

Gauge pressure inside chamber is greater than 40 psig (275.79 kPa) during DRY mode.

Chamber filter clogged.

Check if chamber filter is clogged.

Clean / Replace filter.

Clean with Speed-Clean and brush.

Door spring missing / damaged.

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

Replace door springs.

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

Verify the QTY of door springs. M11- QTY 2, M9-QTY 1

Verify door springs are at a 45 degree angle.

Place door spring at a 45 degree angle.

Door motor system / latch “hanging up”.

Check if the connecting rod is installed in the proper location on the door motor cam. 9 for M9, 11 for M11

Install connecting rod in the proper 9 or 11 location on the door motor cam.

Pressure tubing at incorrect angle.

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

Adjust pressure tubing to correct angle.

Vent valve.

Inspect vent valve.

Clean valve, stretch spring.

Clean / Replace vent valve.

With the sterilizer in the Vent Mode

Perform Vent Valve Testing. The valve is normally open, and should not be energized during the Vent mode.

PC Board malfunctioning.

Perform Heating Element Supply Voltage Test

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

Replace Main PC board.

Perform Main PC Board Relay Test. Check TP1 and TP2 for an acceptable range: 10 to 14 VDC.

Perform Main PC Board Pressure Transducer Voltage Test. Acceptable range: 4.0 to 6.0 VDC.