M9/M11 Sterilizer Non-Coded Troubleshooting Chart

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.

Display / Symptom

Cause

Check

Action
RTC Battery Low RTC battery on main PC board is bad. Check Battery Voltage. Replace RTC battery.

Display / Symptom

Cause

Check

Action

Positive biological / chemical indicator. No color change, or incomplete change has occurred on chemical indicator strip.

Error Message present during cycle.

Check if cycle was interrupted.

Ensure cycle was completed.

Sterilizer overloaded.

Check the size of the load.

Refer to loading guidelines in the User Guide

Reduce load size following proper loading guidelines.

Not following instructions for use of the Biological Indicator.

Ready IFUS for the specific indicator.

Retest following the instructions of the Biological Indicator.

Maintenance not performed.

Verify weekly and monthly maintenance has been performed by customer.

Refer to User Guide.

Perform monthly maintenance.

Biological / Chemical indicators not dry when removed from sterilizer.

Check with operator about how load is being processed.

Advise operator to allow adequate dry time.

Biological Indicator isn’t compatible w/cycle being tested.

Check Biological Indicator labeling or manufacturer’s IFU to verify Biological Indicator is compatible w/ dynamic air removal sterilizers and the time and temp. are suitable for the cycle being tested.

Only use Biological Indicators labeled for use w/dynamic air removal sterilizers and the cycle parameters being tested.

Biological Indicator being used is expired.

Check expiration date on Biological Indicator label or packaging.

Don’t use Biological Indicators beyond their expiration date.

Sterilization cycle was aborted prior to the start of the dry cycle.

Did sterilizer display “items not sterile”.

Retest allowing the sterilizer to complete the cycle before removing the Biological Indicator from the chamber.

Using trays not designed for M9/M11, resulting in improper air flow.

Check trays being used.

Explain to user that only M9/M11

trays or approved cassette / cassette racks can be used.

Indicators being stored in a damp and/or hot environment.

Check conditions of storage area.

Inform operator to follow manufacturer’s instructions for storage before and after process.

Indicators came into contact with water in the sterilizer.

Check with operator about how indicator is positioned.

Refer to: User Guide for proper operating procedures.

Display / Symptom

Cause

Check

Action

When touch pad button(s) are pressed, the display does not respond correctly.

Moisture damage to touch pad.

Listen for audible beep from each key.

Replace touch pad.

Touch pad harness disconnected / loose.

Check touchpad harness connection.

Clean touch pad harness connections.

Secure touch pad harness connections.

Touch pad malfunctioning.

Perform Key Test: Access Service Diagnostic then Refer to:Test Selection Screen

Replace touch pad.

Display / Symptom

Cause

Check

Action

Touch pad / display panel not working.

Ribbon harness from Main PC board to display panel is disconnected.

Check ribbon harness connections.

Secure ribbon harness connections.

Ribbon harness from Main PC board to display panel has open lead(s).

Check continuity of ribbon harness.

Replace ribbon harness.

Display panel is malfunctioning.

Perform Display Panel Supply Voltage Test

Check pins 1 and 2 on J13 for 4-6 VDC.

Replace Display PC board.

Display / Symptom

Cause

Check

Action

Display shows all blocks.

Contrast out of adjustment.

Check contrast adjustment.

Perform LCD Contrast adjustment.

Ribbon harness from touch pad to display panel (J2) is disconnected or damaged.

Check ribbon harness connections.

Secure ribbon harness connections.

Check continuity of ribbon harness.

Replace ribbon harness.

Build up or corrosion on Display PC connection pins and harness.

Clean Display PC connection pins.

Replace Display PC board.

Display / Symptom

Cause

Check

Action

Display shows all blocks.

Display not functioning properly

Reinitialize the display

Press the “+” and “-“ buttons simultaneously
Contrast out of adjustment. Check contrast adjustment. Perform LCD Contrast adjustment.

Ribbon harness from touch pad to display panel (J2) is disconnected or damaged.

Check ribbon harness connections.

Secure ribbon harness connections.

Check continuity of ribbon harness.

Replace ribbon harness.

Build up or corrosion on Display PC connection pins and harness.

Clean Display PC connection pins.

Replace Display PC board.

Display / Symptom

Cause

Check

Action

Display panel shows undefined characters and emits intermittent beeps.

Contrast out of adjustment.

Check contrast adjustment.

Perform LCD Contrast adjustment.

Ribbon harness from touch pad to display panel (J2) is disconnected or damaged.

Check ribbon harness connections.

Secure ribbon harness connections.

Check continuity of ribbon harness.

Replace ribbon harness.

Build up or corrosion on Display PC connection pins and harness.

Clean Display PC connection pins.

Replace Display PC board.

Display / Symptom

Cause

Check

Action

Display panel shows undefined characters and emits intermittent beeps.

Display not functioning properly

Reinitialize the display

Press the “+” and “-“ buttons simultaneously
Contrast out of adjustment Check contrast adjustment. Perform LCD Contrast adjustment.

Ribbon harness from touch pad to display panel (J2) is disconnected or damaged.

Check ribbon harness connections.

Secure ribbon harness connections.

Check continuity of ribbon harness.

Replace ribbon harness.

Build up or corrosion on Display PC connection pins and harness.

Clean Display PC connection pins.

Replace Display PC board.

Display / Symptom

Cause

Check

Action

Door not closing.

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 / 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.

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 door motor.

Door hinge binding.

Check for binding or build up of debris in the door hinges.

Clean debris from hinges.

Residual pressure in chamber.

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 chamber filter is clogged.

Clean / Replace filter.

Clean with Speed-Clean and brush.

Display / Symptom

Cause

Check

Action
Door not open to full vent. 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.
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
Door motor defective 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 door motor.
Door hinge binding. Check for binding or build up of debris in the door hinges. Clean debris from hinges
Display / Symptom Cause Check Action

High Pressure

High Pressure during cycle.

Check where in cycle error occurred.

Explain Display message.

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 Temp Sensor Resistance Test. Allow sensor to cool to room temperature.

Refer to: Temperature Sensor Resistance Test.

Replace Temperature Senser.

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.

Maintenance not performed.

Verify weekly and monthly maintenance has been performed by customer.

Refer to User Guide.

Perform monthly maintenance.
Display / Symptom Cause Check Action

Low Pressure

Low Pressure during cycle.

Check where in cycle error occurred.

Explain Display message.

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.

Maintenance not performed.

Verify weekly and monthly maintenance has been performed by customer.

Refer to User Guide.

Perform monthly maintenance.
Display / Symptom Cause Check Action

Unit not building temperature or pressure.

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.

Loose / damaged wire connection.

Check wire connections at high-limit thermostat and at J5 on Main PC Board.

Secure / repair loose or damaged wire connections.

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

Heats continually/heating element is glowing in select a cycle.

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.

Loose / Damaged wire connections.

Check for crossed or shorted wire connections at overheat thermostats.

Replace wire harness.
Display / Symptom Cause Check Action

High Temperature

Maintenance not performed.

Verify weekly and monthly maintenance has been performed by customer.

Refer to User Guide.

Perform monthly maintenance.

High Limit Thermostats open.

Verify if unit still overheated.

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

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 scotch 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 not level. (Remove tray / trays )

Verify support surface is level.

Place sterilizer on a level support surface.

Verify water on all sides of chamber are equal.

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.

Check all plumbing fitting connections for leakage.

Tighten or replace fittings.
Display / Symptom Cause Check Action

Low Temperature

Maintenance not performed.

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

Perform monthly maintenance.

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.

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.

Check all plumbing fitting connections for leakage.

Tighten or replace fittings.
Display / Symptom Cause Check Action

Temp Hardware

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.
Display / Symptom Cause Check Action

Instruments / packs / pouches are wet after Dry mode is complete.

After sterilization is complete, all items must be handled in accordance with accepted and documented standards, such as the Centers for Disease Control and Prevention (CDC) documents, “Guidelines for Infection Control in Dental Healthcare Settings” Please refer to the CDC guidelines.

Sterilizer overloaded.

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

Reduce load size.

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 hinge binding.

Check for binding or build up of debris in the door hinges.

Clean debris from hinges.

Sterilizer is not level. Remove tray / trays.

Verify support surface is level.

Place sterilizer on a level support surface.

Verify water on all sides of chamber are equal.

Position / orientation of pouch.

Check with operator about how pouches are being loaded.

The preferred method is to position the pouches on edge using the pouch rack accessory. If this is not available, position the pouches with the paper side down.

Customer decreased dry time.

Verify the dry time.

Adjust dry time.

Factory preset is 30 minutes.

Chamber filter clogged.

Check if chamber filter is clogged.

Clean / Replace filter.

Clean with Speed-Clean and brush.

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.
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.
C1017 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.
Door is opened past the vented position. Check if door is being opened past the vented position. Do not open door prior to end of dry cycle.

Excessive wrapping of insturments.

Check if the instruments are wrapped in multiple layers or heavy cloth.

Refer to: Guidelines for loading in the User Guide.
Display / Symptom Cause Check Action

Pouches/packs appear discolored after cycle is complete.

Excessive dry time.

Check the dry time for the cycle parameter.

Adjust dry time.

Factory preset is 30 minutes.

Maintenance not performed.

Verify weekly and monthly maintenance has been performed by customer.

Refer to User Guide.

Perform monthly maintenance.

Sterilizer overloaded.

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

Reduce load size.

Sterilizer is not level. 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.

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.

Door hinge binding.

Check for binding or build up of debris in the door hinges.

Clean debris from hinges.

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.

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.

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 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.
Display / Symptom Cause Check Action

Sterilizer shows signs of rust

Maintenance not performed.

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

Perform monthly maintenance.

Incorrect Water Purity.

Refer to the water purity specification in the User Guide.

Follow water purity specifications.

Instruments are wet prior to sterilization.

Check if instruments are thoroughly dried prior to sterilization.

Dry instruments thoroughly.

Towels or packaging contain chlorine bleach residue.

Check how towels and packaging are laundered.

Do not use chlorine products to launder towels / packaging.

Excessive wrapping of instrument.

Check if the instruments are wrapped in multiple layers or heavy cloth.

Refer to Guidelines for loading in the User Guide.

Instruments are rusting.

Check quality of instrument with magnet. Rust can be transferred from instruments to the sterilizer. Corrosion sensitive material such as carbon steal, iron, etc

Replace rusting instruments.
Display / Symptom Cause Check Action

WATER LOW

Reservoir water level is low.

Check water level in reservoir.

Add distilled water to the reservoir until water reaches appropriate level.

Press STOP button, then initiate a new cycle.

Chamber filter clogged.

Check if chamber filter is clogged.

Clean / Replace filter.

Clean with Speed-Clean and brush.

Water Level sensor malfunctioning / dirty.

Inspect water level sensor.

Clean / Dry water level sensor.

Clean with Speed-Clean and scotch bright pad.

Loose / damaged wire connections. Check wire connections and all grounded locations.

Secure / Repair loose or damaged connections.

Perform Water Level Sensor Test

Replace water level sensor.

Air valve malfunctioning / dirty.

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

If yes- air valve malfunctioning / dirty. Perform Air Valve Test

If no- Refer to:Fill Valve malfunctioning / dirty.

Clean / Replace air valve.

Fill valve malfunctioning / dirty.

Inspect fill valve / related tubing for restrictions.

Clean / Replace fill valve.

Inspect two wires connecting the fill valve and PC board W3 / W4 on PC board for damage and/or loose connections.

Secure / Repair loose or damaged connections.

With the sterilizer in the Fill Mode and door switch engaged

Perform Fill Valve Continuity Test

Clean / Replace fill valve.

PC Board malfunctioning.

Verify voltage to Fill Valve.

Perform Fill Valve Supply Voltage Test

Replace Main PC board.

Chamber is dirty or corroded.

Inspect the bottom of the chamber.

Clean bottom of the chamber with

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

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.
Display / Symptom Cause Check Action

Water puddling under door.

Sterilizer is not level. (Remove tray / trays )

Verify support surface is level.

Place sterilizer on a level support surface.

Verify water on all sides of chamber are equal.

Place sterilizer on a level support surface.

Gap between gasket housing and dam gasket.

Check if there is a gap in between the gasket housing and dam gasket.

Replace dam gasket.

Weak or worn gasket kit.

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.

Gasket housing defective.

Check distance between gasket housing pins.

Replace gasket housing.

Heating element gasket leaking.

Check for corrosion from moisture leaking at heating element terminals or thermostat terminals.

Replace heating element gaskets.

Loose/missing reservoir clamp.

Check if hose clamp at the reservoir is connection to the drain tube is loose, disconnected or damaged.

Tighten/ replace clamp.

Reservoir /tubing leaking.

Check reservoir and tubing from the reservoir to the manifold assembly for leaks.

Repair/replace reservoir or tubing.

Manifold block leaking.

Check manifold block assembly for leaks

Replace Fill/Vent Manifold assembly
Display / Symptom Cause Check Action

Printer does not generate data.

Printer is out of paper.

Lift printer cover and check paper roll.

Refer to: User Guide for proper operating procedures.

Cartridge ribbon is dry.

Check cartridge ribbon.

Install new ribbon cartridge.

Printer needs to be reset.

Perform Software Reset Procedure

Reset Printer software.

Loose / Damaged wire connections.

Check wire connections at J14 on the Main PC board and terminal pins on printer.

Secure / Repair loose or damaged connections.

Check continuity of wire harness.

Replace printer harness if necessary.

Printer malfunctioning.

Paper roll spindle out of position or broken

Reposition/replace spindle.

Perform Printer Supply Voltage Test

Replace printer.

PC Board malfunctioning.

Perform Printer Supply Voltage Test

Replace Main PC board.

Print is very small.

Paper roll too large.

Check size of paper roll. Inform operator that paper roll cannot be larger than 2” in diameter.

Use Midmark paper roll.

Paper roll rubbing on ribbon harness.

Check position of ribbon harness and paper roll.

Secure ribbon harness away from paper roll.

Incorrect paper type being used.

Check if thermal paper is being used.

Use Midmark paper roll.
Printer runs but doesn't print Incorrect paper type used. Check if thermal paper is being used. Use Midmark paper roll.
Display / Symptom Cause Check Action

Printer does not generate data.

Printer is out of paper.

Lift printer cover and check paper roll.

Refer to: User Guide for proper operating procedures.

Printer needs to be reset.

Perform Software Reset Procedure

Reset Printer software.

Loose / Damaged wire connections.

Check wire connections at J14 on the Main PC board and terminal pins on printer.

Secure / Repair loose or damaged connections.

Check continuity of wire harness.

Replace printer harness if necessary.

Printer malfunctioning.

Perform Printer Supply Voltage Test

Replace printer

PC Board malfunctioning.

Perform Printer Supply Voltage Test

Replace Main PC board.

Print is very small.

Paper roll too large.

Check size of paper roll. Inform operator that paper roll cannot be larger than 48mm diameter.

Use Midmark paper roll.

Incorrect paper type being used.

Check if thermal paper is being used.

Use Midmark paper roll.
Display / Symptom Cause Check Action

GFI Tripping

GFI is tripped.

Check if GFI is tripped.

Reset GFI.

Weak / Faulty GFI outlet.

Check if sterilizer works on different GFI outlet.

Contact an electrician to replace GFI outlet.

Voltage leak through sterilizer components.

In service diagnostic, check all electrical components and wire connections for deterioration.

Secure / Clean / Replace compromised component.

Heating element gasket leaking

Check for corrosion from moisture leak at heating element terminals or thermostat connections

Replace heating element gaskets

Replace damaged wire and or connection

Heating element malfunctioning.

With both heater wires J3 and J4 disconnected from the PC board, measure the resistance between the wire to chassis ground.

Replace heating element.
Display / Symptom Cause Check Action

SW1 Switch Settings

SW1 switch #6 is in the “on” position.

Check position of switch #6. Refer to:SW1 Switch Settings

Turn off SW1 switch #6.

Message will not reset.

Move switch #6 on/off. Unplug unit for 60 seconds, then plug unit into a dedicated, properly rated circuit.

Replace Main PC board.
Display / Symptom Cause Check Action

Touch pad/display panel not working.

No power to sterilizer.

Check power cord connection.

Secure power cord connections.

At wall outlet and sterilizer receptacle.

GFI is tripped.

Check if GFI is tripped.

Reset GFI.

No voltage from outlet.

Verify voltage from outlet.

Contact an electrician to modify voltage.

Fuse blown.

Faulty fuses F1 / F2 on main PC board.

Replace fuses.

Fuse holder compromised.

Verify fuse holder is not compromised.

Replace Main PC board.

Faulty PC board.

Refer to: PC Board Test

Replace PC board.

Power cord/receptacle damaged.

Inspect condition of power cord/ receptacle.

Replace power cord/ receptacle.

Loose/damaged wire connections.

Check condition or wires.

Secure/replace wires.
Display / Symptom Cause Check Action

Perform Monthly Maintenance

Sterilizer software detects it has been 28 days since initial start up, or last monthly maintenance.

Refer to User Guide for monthly maintenance procedures.

Perform monthly maintenance procedures.

Initiating a new cycle will clear the maintenance message.
Display / Symptom Cause Check Action

Perform Weekly Maintenance

Sterilizer software detects it has been 7, 14, or 21 days since initial start up, or last monthly maintenance.

Refer to User Guide for weekly maintenance procedures.

Perform weekly maintenance procedures.

Initiating a new cycle will clear the maintenance message
Display / Symptom Cause Check Action

No audible tones, sterlizer functions.

PC board not seeing one of the ribbon cables.

Check connection of ribbon cables at all points.

Disconnect and reconnect ribbon cables in each location several times.

PC Board Malfunctioning.

Check if tones do not return.

Replace Main PC board.
Display / Symptom Cause Check Action

Offensive odor

Maintenance not performed.

Verify weekly and monthly maintenance has been performed by customer.

Refer to User Guide.

Perform monthly maintenance.

End user using rust inhibitor (surgical milk).

Check if draining reservoir daily.

Drain reservoir daily.
Display / Symptom Cause Check Action

Plastic ring fell in reservoir.

End user filling reservoir with distilled water.

None.

Have service technician remove from reservoir next office visit.
Display / Symptom Cause Check Action

Unplug / Replug

 

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

Perform monthly maintenance.

High Limit Thermostats open.

Verify if unit still overheated.

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

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 scotch 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 not level. Remove tray / trays.

Verify support surface is level.

Place sterilizer on a level support surface.

Verify water on all sides of chamber are equal.

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.

Check all plumbing fitting connections for leakage.

Tighten or replace fittings.
Display / Symptom Cause Check Action

Noise / unusual sound

Door / Dam gasket(s).

Press on door to see if noise / sound goes away.

Clean / Replace gaskets.

Maintenance not performed.

Verify weekly and monthly maintenance has been performed by customer.

Refer to User Guide.

Perform monthly maintenance.

Vent valve.

Inspect vent valve.

Clean valve, stretch spring

Clean / Replace vent valve.

Air valve

Check for sticking or debris in air valve.

Clean/replace air valve.

Fan malfunctioning.

Check fan operation.

Replace fan.

Side panel touching PC board transformer.

Check clearance between side panel and PC board.

Adjust side panel/PC board bracket.

Ribbon cable loose or damaged.

If unit is beeping/clicking with no display, or display cuts out.

Secure/replace ribbon harness.