Midmark M9/M11 Error Code C577 Leave a comment
In this article, we’re going to explain one of the many error codes that can affect your Midmark M9/Midmark M11 autoclave. This article will focus specifically on error code C577. We’ll tell you about the problem, what displays when the error occurs, its possible causes, and the course of action to take to resolve said error.
However if you’re more of a visual learner we have a video on this error code available here.
And if you just want to talk to someone, call our Free Tech Support at 704-966-1650 Option 3.
Display/Symptom
C577: DRY MODE STEAM TEMP OVERLIM
UNPLUG/REPLUG UNIT
Steam temperature exceeds 284°F (140°C) during DRY mode.
Causes, Checks and Actions
Possible Cause 1: Door Spring missing/damaged.
- Check 1: If the door motor releases the latch, but the door remains closed, Inspect door spring for damage.
- Check 2: Verify if door is at the vented position. (Push in on door with out lifting handle)
- Check 3: Verify the QTY of door springs. (M11- QTY 2, M9-QTY 1)
- Action: Replace door springs.
- Check 1: Verify door springs are at a 45 degree angle.
- Action: Place door spring at 45 degree angle.
Possible Cause 2: Temperature sensor malfunctioning.
- Check A: Check for residue build up on temperature sensor probe.
- Action A: Clean sensor probe with Speed-Clean, distilled water, and abrasive pad.
- Check B: Check that nothing is touching or crowding the temperature sensor. (Example: trays, pouches, cassettes, etc.)
- Action B: Reposition items so nothing touches or crowds the temperature sensor.
- Check C: 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
- Action C: Replace Temperature Sensor
M9 Temperature Sensor available here
M11 Temperature Sensor available here.
- Check D: Perform: Temperature Sensor Supply Voltage Test. Disconnect sensor harness from J12 on PC board. On pins 1 & 2 acceptable range is 4.0 – 6.0 VDC. Refer to: Temperature Sensor Supply Voltage Test
- Action D: Replace Main PC Board.
M9 PC Board OEM available here
M11 PC Board OEM available here
Possible Cause 3: Heating Element malfunction.
- Check: 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)
- Action: Replace heating element.
M9 Heating Element OEM available here
M11 Heating Element OEM available here
Possible Cause 4: Facility voltage too high/low.
- Check: Test facility supply voltage. Voltage must be… 115V models: 104 – 127 VAC 50/60 Hz 230V models: 207 – 253 VAC 50/60 Hz
- Action: Contact an electrician to modify voltage.
Door Motor system/latch “hanging up”.
- Check: Check if the connecting rod is installed in the proper location on the door motor cam. (9 for M9, 11 for M11)
- Action: Install connecting rod in the proper 9 or 11 location on the door motor cam.
M9/M11 Door Motor Available here.
As always if you have any questions about this process or anything else please feel free to contact us and take advantage of our “FREE TECH SUPPORT.”
We also offer FREE VIRTUAL TECH SUPPORT to “See and Talk” with a “Real Time Live Technician” for any problems you may be in need of help with.
You can also use our “FREE MAINTENANCE PROGRAM”. Take the guesswork and worrying about what unit is due for maintenance and which maintenance cycle it is time for. We will keep track of all your autoclaves and let you know when it’s time for anything.