M9/M11 Sterilizer Temperature Sensor Error Codes: C533 to C577 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.

C533

Display / Symptom	Cause	Check	Action
C533: HEATUP MODE STEAM TEMP LOW ITEMS NOT STERILE UNPLUG / REPLUG UNIT Sterilization Mode not reached after 40 minutes.	Maintenance not performed.	Verify weekly and monthly maintenance has been performed by customer. Refer to User Guide.	Perform monthly maintenance.
	Sterilizer is not level. Remove tray / trays.	Verify support surface is level.	Place sterilizer on a level support surface.
	Sterilizer is not level. Remove tray / trays.	Verify water on all sides of chamber are equal.	Place sterilizer on a level support surface.
	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.
	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 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.

C534

Display / Symptom	Cause	Check	Action
C534: STERILIZE MODE STEAM TEMP LOW ITEMS NOT STERILE UNPLUG / REPLUG UNIT During Sterilization Mode, chamber temperature dropped below the cycle’s designated sterilization temperature.	Maintenance not performed.	Verify weekly and monthly maintenance has been performed by customer. Refer to User Guide.	Perform monthly maintenance.
	Sterilizer is not level. Remove tray / trays.	Verify support surface is level.	Place sterilizer on a level support surface.
	Sterilizer is not level. Remove tray / trays.	Verify water on all sides of chamber are equal.	Place sterilizer on a level support surface.
	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 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.
	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.
	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.

C544

Display / Symptom	Cause	Check	Action
C544: STERILIZE MODE STEAM TEMP HIGH ITEMS NOT STERILE UNPLUG / REPLUG UNIT During Sterilization Mode, chamber temperature reached 6°F above the designated sterilization temperature.	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.
	Sterilizer is unlevel. Remove tray / trays.	Verify water on all sides of chamber are equal.	Place sterilizer on a level support surface.
	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 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.
	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.
	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.
		Verify unit is operating within designated program parameters. Refer to: Using a Pressure gauge

C560

Display / Symptom	Cause	Check	Action
C560: POWERUP MODE STEAM TEMP HARDWARE UNPLUG / REPLUG UNIT Steam A/D converter reports an average value outside the limits for normal operation during POWER UP mode.	Unit was brought in from cold environment.	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.
	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.
		Check temperature sensor harness connection at J12 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 1.07-1.1K 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.

C561

Display / Symptom	Cause	Check	Action
C561: SELECT MODE STEAM TEMP HARDWARE UNPLUG / REPLUG UNIT Steam 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.
		Check temperature sensor harness connection at J12 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 1.07-1.1K 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.
	Sterilizer is unlevel. Remove tray / trays .	Verify water on all sides of chamber are equal.	Place sterilizer on a level support surface.

C562

Display / Symptom	Cause	Check	Action
C562: FILL MODE STEAM TEMP HARDWARE UNPLUG / REPLUG UNIT Steam 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.
		Check temperature sensor harness connection at J12 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 1.07-1.1K 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.
	Sterilizer is unlevel. Remove tray / trays .	Verify water on all sides of chamber are equal.	Place sterilizer on a level support surface.

C563

Display / Symptom	Cause	Check	Action
C563: HEATUP MODE STEAM TEMP HARDWARE UNPLUG / REPLUG UNIT Steam 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.
		Check temperature sensor harness connection at J12 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 1.07-1.1K 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.
	Sterilizer is unlevel. Remove tray / trays.	Verify water on all sides of chamber are equal.	Place sterilizer on a level support surface.

C564

Display / Symptom	Cause	Check	Action
C564: STERILIZE MODE STEAM TEMP HARDWARE UNPLUG / REPLUG UNIT Steam 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.
		Check temperature sensor harness connection at J12 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 1.07-1.1K 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.
	Sterilizer is unlevel. Remove tray / trays.	Verify water on all sides of chamber are equal.	Place sterilizer on a level support surface.

C565

Display / Symptom	Cause	Check	Action
C565: VENT MODE STEAM TEMP HARDWARE UNPLUG / REPLUG UNIT Steam A/D converter reports an average value outside the limits for normal operation during 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.
		Check temperature sensor harness connection at J12 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 1.07-1.1K 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.
	Sterilizer is unlevel. Remove tray / trays.	Verify water on all sides of chamber are equal.	Place sterilizer on a level support surface.

C566

Display / Symptom	Cause	Check	Action
566: DOOR OPEN MODE STEAM TEMP HARDWARE UNPLUG / REPLUG UNIT Steam A/D converter reports an average value outside the limits for normal operation during DOOR OPEN 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.
		Check temperature sensor harness connection at J12 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 1.07-1.1K 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.
	Sterilizer is unlevel. Remove tray / trays.	Verify water on all sides of chamber are equal.	Place sterilizer on a level support surface.

C567

Display / Symptom	Cause	Check	Action
567: DRY MODE STEAM TEMP HARDWARE UNPLUG / REPLUG UNIT Steam 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.
		Check temperature sensor harness connection at J12 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 1.07-1.1K 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.
	Sterilizer is unlevel. Remove tray / trays .	Verify water on all sides of chamber are equal.	Place sterilizer on a level support surface.

C570

Display / Symptom	Cause	Check	Action
C570: POWER UP MODE STEAM TEMP OVERLIM UNPLUG / REPLUG UNIT Steam temperature exceeds 285°F (140.60°C) 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.	Secure power cord connections. At wall outlet and sterilizer receptacle.
	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.
	Sterilizer is unlevel. Remove tray / trays.	Verify support surface is level.	Place sterilizer on a level support surface.
	Sterilizer is unlevel. Remove tray / trays.	Verify water on all sides of chamber are equal.	Place sterilizer on a level support surface.

C571

Display / Symptom	Cause	Check	Action
C571: SELECT MODE STEAM TEMP OVERLIM UNPLUG / REPLUG UNIT Steam temperature exceeds 285°F (140.60°C) 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.
	Sterilizer is unlevel. Remove tray / trays.	Verify support surface is level.	Place sterilizer on a level support surface.
	Sterilizer is unlevel. Remove tray / trays.	Verify water on all sides of chamber are equal.	Place sterilizer on a level support surface.

C572

Display / Symptom	Cause	Check	Action
C572: FILL MODE STEAM TEMP OVERLIM UNPLUG / REPLUG UNIT Steam temperature exceeds 285°F (140.60°C) 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.
	Sterilizer is unlevel. Remove tray / trays.	Verify support surface is level.	Place sterilizer on a level support surface.
	Sterilizer is unlevel. Remove tray / trays.	Verify water on all sides of chamber are equal.	Place sterilizer on a level support surface.

C573

Display / Symptom	Cause	Check	Action
C573: HEATUP MODE STEAM TEMP OVERLIM UNPLUG / REPLUG UNIT Steam temperature exceeds 285°F (140.60°C) during HEAT UP mode.	Office running back to back cycles.	Check if operator is running consecutive cycles without completing the DRY cycle.	Complete full cycle.
	If the unit skips the Fill mode
	Tray rack / tray plate not installed properly.	Inspect tray rack / tray plate for proper installation. The 45 degree angled end of tray plate must be positioned upward and to the back of the chamber.	Install tray rack / tray plate properly.
	(M11) Mesh filter not in place.	Verify filter is in place.	Re-Install filter.
	Water Level sensor malfunctioning / dirty.	Inspect water level sensor. Check for residual moisture.	Clean / Dry water level sensor. Clean with Speed-Clean and bright pad.
		Verify if filling or skipping fill. “filling chamber” will display on display for 30-60 seconds.
		Perform Water Level Sensor Testing	Replace water level sensor.
	If the unit completes the Fill mode…
	Sterilizer is unlevel. Remove tray / trays.	Verify support surface is level.	Place sterilizer on a level support surface.
	Sterilizer is unlevel. Remove tray / trays.	Verify water on all sides of chamber are equal.	Place sterilizer on a level support surface.
	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 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.
	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.
	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.

C574

Display / Symptom	Cause	Check	Action
C574: STERILIZE MODE STEAM TEMP OVERLIM ITEMS NOT STERILE UNPLUG / REPLUG UNIT Steam temperature exceeds 285°F (140.60°C) during STERILIZE mode.	Sterilizer is unlevel. Remove tray / trays.	Verify support surface is level.	Place sterilizer on a level support surface.
	Sterilizer is unlevel. Remove tray / trays.	Verify water on all sides of chamber are equal.	Place sterilizer on a level support surface.
	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 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.
	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.
	Chamber filter clogged.	Check if chamber filter is clogged.	Clean / Replace filter. Clean with Speed-Clean and brush.
	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.

C575

Display / Symptom	Cause	Check	Action
C575: VENT MODE STEAM TEMP OVERLIM ITEMS NOT STERILE UNPLUG / REPLUG UNIT Steam temperature exceeds 285°F (140.60°C) during VENT mode.	Sterilizer is unlevel. Remove tray / trays.	Verify support surface is level.	Place sterilizer on a level support surface.
	Sterilizer is unlevel. Remove tray / trays.	Verify water on all sides of chamber are equal.	Place sterilizer on a level support surface.
	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 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.

C576

Display / Symptom	Cause	Check	Action
C576: DOOR OPEN MODE STEAM TEMP OVERLIM ITEMS NOT STERILE UNPLUG / REPLUG UNIT Steam temperature exceeds 285°F (140.60°C) during DOOR OPEN 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.

C577

Display / Symptom	Cause	Check	Action
C577: DRY MODE STEAM TEMP OVERLIM ITEMS NOT STERILE UNPLUG / REPLUG UNIT Steam temperature exceeds 285°F (140.60°C) during 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.
	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.
	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.
	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.
	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.

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M9/M11 Sterilizer Temperature Sensor Error Codes: C533 to C577 Troubleshooting