What are Midmark M3 Error Codes C981 – C987?
Understanding the error codes that may arise while using any autoclave is crucial for ensuring its optimal performance and reliability. So in
this article, we will delve into some of the various error codes of the Midmark M3 compact autoclave. Specifically, we’ll look at Error Codes C981 – C987. Deciphering these signals isn’t just about fixing a problem; it’s about ensuring uninterrupted workflow, safeguarding patient and user safety, and preventing costly downtime or potential compliance issues. So we’ll go over the details of what each code means, as well as actions you can take to troubleshoot them.
If you have any questions about these error codes, the Midmark M3 or anything else, please give us a call at 704-966-1650 Option 3 for our Free Tech Support Line.
Error Code C981
Display/Symptom
SELECT MODE BOILER HI-LIMIT OPEN
ITEMS NOT STERILE TURN POWER OFF/ON
Boiler overheat thermostat has opened for at least 0.25 seconds & needs to be manually reset.
Cause 1: Water pump not primed.
Check
Check Water Pump Priming Instructions.
Action
Prime water pump.
Cause 2: Boiler temperature sensor not functioning properly.
Check
Perform a Temperature Sensor Resistance Test.
Action
Replace boiler temperature sensor.
Cause 3: Boiler overheat thermostat disconnected at PC board.
Check
Check wire connections at J3 on PC board.
Action
Secure wire connections.
Cause 4: Loose or broken wire connections at boiler overheat thermostat.
Check
Check wire connections at boiler overheat thermostat.
Action
Secure wire connections.
Cause 5: Boiler overheat thermostat tripped open prematurely.
Check
Check if overheat thermostat can be manually reset with a cooled boiler.
Action
Replace overheat thermostat.
Error Code C982
Display/Symptom
CLOSE MODE BOILER HI-LIMIT OPEN
ITEMS NOT STERILE TURN POWER OFF/ON
Boiler overheat thermostat has opened for at least 0.25 seconds & needs to be manually reset.
Cause 1: Water pump not primed.
Check
Check Water Pump Priming Instructions.
Action
Prime water pump.
Cause 2: Boiler temperature sensor not functioning properly.
Check
Perform a Temperature Sensor Resistance Test.
Action
Replace boiler temperature sensor.
Cause 3: Boiler overheat thermostat disconnected at PC board.
Check
Check wire connections at J3 on PC board.
Action
Secure wire connections.
Cause 4: Loose or broken wire connections at boiler overheat thermostat.
Check
Check wire connections at boiler overheat thermostat.
Action
Secure wire connections.
Cause 5: Boiler overheat thermostat tripped open prematurely.
Check
Check if overheat thermostat can be manually reset with a cooled boiler.
Action
Replace overheat thermostat.
Error Code C983
Display/Symptom
HEAT UP MODE BOILER HI-LIMIT OPEN
ITEMS NOT STERILE TURN POWER OFF/ON
Boiler overheat thermostat has opened for at least 0.25 seconds & needs to be manually reset.
Cause 1: Water pump not primed.
Check
Check Water Pump Priming Instructions.
Action
Prime water pump.
Cause 2: Boiler temperature sensor not functioning properly.
Check
Perform a Temperature Sensor Resistance Test.
Action
Replace boiler temperature sensor.
Cause 3: Boiler overheat thermostat disconnected at PC board.
Check
Check wire connections at J3 on PC board.
Action
Secure wire connections.
Cause 4: Loose or broken wire connections at boiler overheat thermostat.
Check
Check wire connections at boiler overheat thermostat.
Action
Secure wire connections.
Cause 5: Boiler overheat thermostat tripped open prematurely.
Check
Check if overheat thermostat can be manually reset with a cooled boiler.
Action
Replace overheat thermostat.
Error Code C984
Display/Symptom
STERILIZE MODE BOILER HI-LIMIT OPEN
ITEMS NOT STERILE TURN POWER OFF/ON
Boiler overheat thermostat has opened for at least 0.25 seconds & needs to be manually reset.
Cause 1: Water pump not primed.
Check
Check Water Pump Priming Instructions.
Action
Prime water pump.
Cause 2: Boiler temperature sensor not functioning properly.
Check
Perform a Temperature Sensor Resistance Test.
Action
Replace boiler temperature sensor.
Cause 3: Boiler overheat thermostat disconnected at PC board.
Check
Check wire connections at J3 on PC board.
Action
Secure wire connections.
Cause 4: Loose or broken wire connections at boiler overheat thermostat.
Check
Check wire connections at boiler overheat thermostat.
Action
Secure wire connections.
Cause 5: Boiler overheat thermostat tripped open prematurely.
Check
Check if overheat thermostat can be manually reset with a cooled boiler.
Action
Replace overheat thermostat.
Error Code C986
Display/Symptom
OPEN MODE BOILER HI-LIMIT OPEN
ITEMS NOT STERILE TURN POWER OFF/ON
Boiler overheat thermostat has opened for at least 0.25 seconds & needs to be manually reset.
Cause 1: Water pump not primed.
Check
Check Water Pump Priming Instructions.
Action
Prime water pump.
Cause 2: Boiler temperature sensor not functioning properly.
Check
Perform a Temperature Sensor Resistance Test.
Action
Replace boiler temperature sensor.
Cause 3: Boiler overheat thermostat disconnected at PC board.
Check
Check wire connections at J3 on PC board.
Action
Secure wire connections.
Cause 4: Loose or broken wire connections at boiler overheat thermostat.
Check
Check wire connections at boiler overheat thermostat.
Action
Secure wire connections.
Cause 5: Boiler overheat thermostat tripped open prematurely.
Check
Check if overheat thermostat can be manually reset with a cooled boiler.
Action
Replace overheat thermostat.
Error Code C987
Display/Symptom
DRY MODE BOILER HI-LIMIT OPEN
ITEMS NOT STERILE TURN POWER OFF/ON
Boiler overheat thermostat has opened for at least 0.25 seconds & needs to be manually reset.
Cause 1: Water pump not primed.
Check
Check Water Pump Priming Instructions.
Action
Prime water pump.
Cause 2: Boiler temperature sensor not functioning properly.
Check
Perform a Temperature Sensor Resistance Test.
Action
Replace boiler temperature sensor.
Cause 3: Boiler overheat thermostat disconnected at PC board.
Check
Check wire connections at J3 on PC board.
Action
Secure wire connections.
Cause 4: Loose or broken wire connections at boiler overheat thermostat.
Check
Check wire connections at boiler overheat thermostat.
Action
Secure wire connections.
Cause 5: Boiler overheat thermostat tripped open prematurely.
Check
Check if overheat thermostat can be manually reset with a cooled boiler.
Action
Replace overheat thermostat.
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.
You can view the Midmark M3 autoclave on our website here for more info.