Midmark M9 & M11 Service Diagnostics

 

Midmark M9 & M11 Service Diagnostics



For Midmark M9 & M11 Autoclaves Model Number -020 thru -022 With The Following Serial Number Prefixes:

RN, RP, RR, RS, RT, RV, RW, RX, RY, RZ, V

Service Diagnostics


The Service Diagnostics feature allows you to view recent error codes and test the sterilizer's major components without running a complete cycle.

The Service Diagnostics tests should always be done before replacing any major component

CAUTION: This operation requires power to be connected to the unit with the panels removed. Use caution when performing this procedure

  1. Disconnect Power Cord from outlet
  2. Remove Right Side Panel - Click Here For Instructions
  3. Move Switch #1 on the SW1 Block to ON
  4. Reconnect Power Cord
  5. Press START Button (Then, go to Test Selection Screen page)
Test Selection Screen
I/O Test


Press the START button to initiate the I/O Test.

This test allows you to energize the air valve, vent valve, fill valve, door motor, and heating element independently without running a cycle.

This test also displays the temperature & pressure inside the chamber, and the status of the high-limit thermostats, door switch, and the water level sensor

Note: Press the STOP button to show the last five error codes displayed on the unit

Note: Press the HANDPIECES button to initiate the Keytest. This test allows you to check the functionality of the buttons on the touch pad

Air Valve Test

I/O Test
  • Press the START button. This energizes the Air Valve, causing it to open
  • Pressing the START button again, closes the valve (You should hear a "click" when the valve opens / closes. This indicates the PC Board and valve are functioning properly)
  • Press the STOP button for the next test.
Vent Valve Test

I/O Test
  • Press the START button. This energizes the Vent Valve, causing it to close.
  • Pressing the START button again, opens the valve. (You should hear a "click" when the valve opens / closes. This indicates the PC Board and valve are functioning properly)
  • Press the STOP button for the next test
Fill Valve Test

Note: The door switch must be tripped when testing the Fill Valve. Close the door or manually trip the switch. The water level sensor does not function during this test. The chamber will overflow if the valve is left open too long.

I/O Test
  • Press the START button. This energizes the Fill Valve, causing it to open
  • Pressing the START button again, closes the valve. (Water will flow into the chamber when the valve opens. This indicates the PC Board and valve are functioning properly)
  • Press the STOP button for the next test
Door Opening Test

Note: This test should be done with the door closed. I/O Test
  • Press the START button. This energizes the Door Motor System
    • (The door should open after approx. 15 seconds. This indicates the PC Board and door motor are functioning properly)
  • Press the STOP button for the next test
Heating Element Test

Note: Do not run this test more than twice without allowing the unit to cool. Doing so may cause the sterilizer to overheat

I/O Test
  • Press the START button. This energizes the Heating Element (The heating element should heat up for approx. 15 seconds, then shut off. This indicates the PC Board and heating element are functioning properly)
  • Press the STOP button for the next test
I/O Test

The display shows the status of the High-Limit Thermostats, the Door Switch, and the Water Level Sensor. (If the display reading shows a malfunction, test the corresponding component)

High-Limit Thermostats

Status should always be: CLOSED.

OPEN, indicates malfunctioning thermostat(s), or that the unit has overheated.

Door Switch

Status should correctly reflect the position of the door. (OPEN or CLOSED)

If Door Switch does not indicate the position of the door, it is defective and must be replaced

Water Level Sensor

Status should reflect the amount of water in the chamber. If water is contacting the sensor, status should be: FULL. If not: EMPTY

If not reflected accurately, the Water Level Sensor is defective and must be replaced

Press the STOP button for the next test.

I/O Test

The display shows the chamber temperature & pressure.

Chamber Temperature should be verified with the Maximum Registering Thermometer

Chamber Pressure With the door open, display should show: 0.0 PSI (0.0 kPa)

Press the STOP button to return to the Test Selection Screen.

Test Selection Screen
Recall Errors


Recall Errors The display shows the last five error codes displayed on the unit. (NOTE: 1: is the most recent error code, 5: is the oldest). Write Down the Error Codes for future reference

To erase all five error codes from memory.....Press the START button.

To retain the error codes.....Press the STOP button

Key Test


Press the HANDPIECES button to initiate the Keytest. This test allows you to check the functionality of the buttons on the touch pad

Keytest

Press the START button. (When the designated button is pressed, you will hear single "beep", and the test will advance to the next button. This indicates the button is functioning properly)

Keytest

Press the STOP button

Keytest Press the HANDPIECES button. (Continue for all remaining buttons)

To return to normal operating mode
  1. Disconnect power cord.
  2. Move #1 switch (SW1 block) to OFF
  3. Reconnect power cord

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