Midmark M9 & M11 Error Code C533: HEATUP MODE
When is the error code appearing?
The first step in determining the problem and it's solution is to take note of when the Error Code C533: HEATUP MODE is appearing. Once you know when the error code is appearing, scroll down & locate the proper chart for solutions
If The Autoclave Skips The FILL Cycle
| Display/Symptom |
Cause |
What to Check |
Solution |
C533: HEATUP MODE
STEAM TEMP LOW
ITEMS NOT STERILE
UNPLUG / REPLUG UNIT
Sterilization Mode not reached after 25 minutes. |
The Base Tray Plate or the Tracy Rack is not installed properly |
Inspect Base Tray Plate and Tray Rack for proper installation. (Angled end of Base Tray Plate must be toward the back of the chamber) |
Install Base Tray Plate and Tray Rack properly. Unplug the autoclave for 60 seconds before plugging back in |
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Water Level Sensor Not Functioning Properly |
Check the Water Level Sensor Disc to see if it is damp or wet |
Dry Water Level Sensor Disc with a Lint Free Cloth and try another cycle |
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While there is an electical test you an perform to verify the water level sensor is malfunctioning, there is a more simple & direct way to test it |
Remove the Base Tray Plate & Tray Rack from the autoclave. Pour Distilled Water into the chamber until it touches the water level sensor & start another cycle. If it successfully completes the cycle, then you know the Water Level Sensor is bad & needs to be replaced
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If The Autoclave Completes The Fill Cycle
If after selecting a cycle, the display reads FILLING and then advances to the heat up mode prior to giving you the C533: HEATUP MODE Error Code, then this is what you need to look for:
| Display/Symptom |
Cause |
What to Check |
Solution |
C980: POWER UP MODE:
HI-LIMIT OPEN
UNPLUG / REPLUG UNITHigh-limit thermostat opened for at least 0.25 seconds during POWER UP mode |
Pressure leaking from chamber. |
Check for pressure leaks. Click Here To See "How To Find Pressure Leaks" |
Repair or replace malfunctioning component |
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Temperature Sensor malfunctioning |
Be sure there is nothing touching the temperature sensor. (Example: trays, pouches, cassettes, etc.) |
Reposition items so nothing touches the temperature sensor |
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Check the temperature sensor probe for corrosion or residue |
Clean the temperature sensor with Mid-Clean™ and distilled water |
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Perform Temperature Sensor Testing |
Follow instructions in test procedures |
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Place a Maximum Registering Thermometer inside the autoclave chamber. Click Here to get one (Part #RPT113-3699)
Run the "Heating Element Test" and compare the temperature readings
Refer to: Service Diagnostics (I/O Test) |
If STEAM temperature reading is not in line with temperature probe reading, replace temperature sensor
Click Here for the Midmark M9 Temperature Sensor Part #MIS121-4037
Click Here for the Midmark M9 Temperature Sensor Part #MIS121-4038
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Sterilizer is not level |
Check surface where autoclave is located to make sure it is level |
Level with From Leveling Feet, or move the autoclave to a level surface |
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Heating element malfunctioning |
Test the Heating Element |
Replace The Heating Element if it fails the test
Click Here and scroll down the page for the instructions on testing the Midmark M9 autoclave
Click Here and scroll down the page for the instructions on testing the Midmark M11 autoclave
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