What are Midmark M3 Error Codes C760 – C778?
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 C760 – C778. 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 C760
Display / Symptom
POWER UP MODE BOILER TEMP HARDWARE
ITEMS NOT STERILE TURN POWER OFF/ON
A/D converter reports boiler temperature input value outside the normal limits.
Cause 1: Boiler temperature sensor disconnected at PC board.
Check: Check for loose or broken wire connections at J10 on PC board.
Solution: Secure wire connections.
Cause 2: Boiler temperature sensor not functioning properly.
Check: Perform Temperature Sensor Resistance Test.
Solution: Replace boiler temperature sensor.
Cause 3: Boiler not functioning properly.
Check: Perform Boiler Test.
Solution: Replace boiler if necessary.
Cause 4: PC Board is not processing temperature input(s) properly.
Check: Verify boiler temperature sensor is working properly.
Solution: Replace PC board, if necessary.
Error Code C761
Display / Symptom
SELECT MODE BOILER TEMP HARDWARE
ITEMS NOT STERILE TURN POWER OFF/ON
A/D converter reports boiler temperature input value outside the normal limits.
Cause 1: Boiler temperature sensor disconnected at PC board.
Check: Check for loose or broken wire connections at J10 on PC board.
Solution: Secure wire connections.
Cause 2: Boiler temperature sensor not functioning properly.
Check: Perform Temperature Sensor Resistance Test.
Solution: Replace boiler temperature sensor.
Cause 3: Boiler not functioning properly.
Check: Perform Boiler Test.
Solution: Replace boiler if necessary.
Cause 4: PC Board is not processing temperature input(s) properly.
Check: Verify boiler temperature sensor is working properly.
Solution: Replace PC board, if necessary.
Error Code C762
CLOSE MODE BOILER TEMP HARDWARE
ITEMS NOT STERILE TURN POWER OFF/ON
A/D converter reports boiler temperature input value outside the normal limits.
Cause 1: Boiler temperature sensor disconnected at PC board.
Check: Check for loose or broken wire connections at J10 on PC board.
Solution: Secure wire connections.
Cause 2: Boiler temperature sensor not functioning properly.
Check: Perform Temperature Sensor Resistance Test.
Solution: Replace boiler temperature sensor.
Cause 3: Boiler not functioning properly.
Check: Perform Boiler Test.
Solution: Replace boiler if necessary.
Cause 4: PC Board is not processing temperature input(s) properly.
Check: Verify boiler temperature sensor is working properly.
Solution: Replace PC board, if necessary.
Error Code C764
Display / Symptom
STERILIZE MODE BOILER TEMP HARDWARE
ITEMS NOT STERILE TURN POWER OFF/ON
A/D converter reports boiler temperature input value outside the normal limits.
Cause 1: Boiler temperature sensor disconnected at PC board.
Check: Check for loose or broken wire connections at J10 on PC board.
Solution: Secure wire connections.
Cause 2: Boiler temperature sensor not functioning properly.
Check: Perform Temperature Sensor Resistance Test.
Solution: Replace boiler temperature sensor.
Cause 3: Boiler not functioning properly.
Check: Perform Boiler Test.
Solution: Replace boiler if necessary.
Cause 4: PC Board is not processing temperature input(s) properly.
Check: Verify boiler temperature sensor is working properly.
Solution: Replace PC board, if necessary.
Error Code C765
Display / Symptom
VENT MODE BOILER TEMP HARDWARE
ITEMS NOT STERILE TURN POWER OFF/ON
A/D converter reports boiler temperature input value outside the normal limits.
Cause 1: Boiler temperature sensor disconnected at PC board.
Check: Check for loose or broken wire connections at J10 on PC board.
Solution: Secure wire connections.
Cause 2: Boiler temperature sensor not functioning properly.
Check: Perform Temperature Sensor Resistance Test.
Solution: Replace boiler temperature sensor.
Cause 3: Boiler not functioning properly.
Check: Perform Boiler Test.
Solution: Replace boiler if necessary.
Cause 4: PC Board is not processing temperature input(s) properly.
Check: Verify boiler temperature sensor is working properly.
Solution: Replace PC board, if necessary.
Error Code C766
Display / Symptom
OPEN MODE BOILER TEMP HARDWARE
ITEMS NOT STERILE TURN POWER OFF/ON
A/D converter reports boiler temperature input value outside the normal limits.
Cause 1: Boiler temperature sensor disconnected at PC board.
Check: Check for loose or broken wire connections at J10 on PC board.
Solution: Secure wire connections.
Cause 2: Boiler temperature sensor not functioning properly.
Check: Perform Temperature Sensor Resistance Test.
Solution: Replace boiler temperature sensor.
Cause 3: Boiler not functioning properly.
Check: Perform Boiler Test.
Solution: Replace boiler if necessary.
Cause 4: PC Board is not processing temperature input(s) properly.
Check: Verify boiler temperature sensor is working properly.
Solution: Replace PC board, if necessary.
Error Code C767
Display / Symptom
DRY MODE BOILER TEMP HARDWARE
ITEMS NOT STERILE TURN POWER OFF/ON
A/D converter reports boiler temperature input value outside the normal limits.
Cause 1: Boiler temperature sensor disconnected at PC board.
Check: Check for loose or broken wire connections at J10 on PC board.
Solution: Secure wire connections.
Cause 2: Boiler temperature sensor not functioning properly.
Check: Perform Temperature Sensor Resistance Test.
Solution: Replace boiler temperature sensor.
Cause 3: Boiler not functioning properly.
Check: Perform Boiler Test.
Solution: Replace boiler if necessary.
Cause 4: PC Board is not processing temperature input(s) properly.
Check: Verify boiler temperature sensor is working properly.
Solution: Replace PC board, if necessary.
Error Code C768
Display / Symptom
COMPLETE MODE BOILER TEMP HARDWARE
ITEMS NOT STERILE TURN POWER OFF/ON
A/D converter reports boiler temperature input value outside the normal limits.
Cause 1: Boiler temperature sensor disconnected at PC board.
Check: Check for loose or broken wire connections at J10 on PC board.
Solution: Secure wire connections.
Cause 2: Boiler temperature sensor not functioning properly.
Check: Perform Temperature Sensor Resistance Test.
Solution: Replace boiler temperature sensor.
Cause 3: Boiler not functioning properly.
Check: Perform Boiler Test.
Solution: Replace boiler if necessary.
Cause 4: PC Board is not processing temperature input(s) properly.
Check: Verify boiler temperature sensor is working properly.
Solution: Replace PC board, if necessary.
Error Code C770
Display / Symptom
POWER UP MODE BOILER TEMP OVER LIMIT
ITEMS NOT STERILE TURN POWER OFF/ON
Boiler temperature is greater than 340° F (171° C)
Cause: Steam not being released from chamber (Potential blockage/obstruction).
Check 1a
Check for obstruction in plastic tube connecting unit to external condensing tank.
Solution 1a
Unkink plastic tube, remove obstruction, or replace.
Check 1b
Check copper coil in external condensing tank for blockage or damage.
Solution 1b
Clear obstruction or replace copper coil.
Check 1c
Check vent port in chamber for blockage. Check filter for blockage.
Solution 1c
Clear obstruction in vent port. Clean or replace filter.
Check 1d
Check vent valve for blockage. Put unit into Service Diagnostics and check vent
valve operation.
Solution 1d
Clean or replace vent valve.
Cause: Boiler temperature sensor disconnected at PC board.
Check
Check for loose or broken wire connections at J10 on PC board.
Solution
Secure wire connections.
Cause
Boiler temperature sensor not functioning properly.
Check: Perform Temperature Sensor Resistance Test.
Solution
Replace boiler temperature sensor.
Cause: PC Board is not processing temperature input(s) properly.
Check
Verify boiler temperature sensor is working properly.
Solution
Replace PC board, if necessary.
Error Code C771
Display / Symptom
SELECT MODE BOILER TEMP OVER LIMIT
ITEMS NOT STERILE TURN POWER OFF/ON
Boiler temperature is greater than 340° F (171° C)
Cause: Steam not being released from chamber (Potential blockage/obstruction).
Check 1a
Check for obstruction in plastic tube connecting unit to external condensing tank.
Solution 1a
Unkink plastic tube, remove obstruction, or replace.
Check 1b
Check copper coil in external condensing tank for blockage or damage.
Solution 1b
Clear obstruction or replace copper coil.
Check 1c
Check vent port in chamber for blockage. Check filter for blockage.
Solution 1c
Clear obstruction in vent port. Clean or replace filter.
Check 1d
Check vent valve for blockage. Put unit into Service Diagnostics and check vent
valve operation.
Solution 1d
Clean or replace vent valve.
Cause: Boiler temperature sensor disconnected at PC board.
Check
Check for loose or broken wire connections at J10 on PC board.
Solution
Secure wire connections.
Cause
Boiler temperature sensor not functioning properly.
Check: Perform Temperature Sensor Resistance Test.
Solution
Replace boiler temperature sensor.
Cause: PC Board is not processing temperature input(s) properly.
Check
Verify boiler temperature sensor is working properly.
Solution
Replace PC board, if necessary.
Error Code 772
Display / Symptom
CLOSE MODE BOILER TEMP OVER LIMIT
ITEMS NOT STERILE TURN POWER OFF/ON
Boiler temperature is greater than 340° F (171° C)
Cause: Steam not being released from chamber (Potential blockage/obstruction).
Check 1a
Check for obstruction in plastic tube connecting unit to external condensing tank.
Solution 1a
Unkink plastic tube, remove obstruction, or replace.
Check 1b
Check copper coil in external condensing tank for blockage or damage.
Solution 1b
Clear obstruction or replace copper coil.
Check 1c
Check vent port in chamber for blockage. Check filter for blockage.
Solution 1c
Clear obstruction in vent port. Clean or replace filter.
Check 1d
Check vent valve for blockage. Put unit into Service Diagnostics and check vent
valve operation.
Solution 1d
Clean or replace vent valve.
Cause: Boiler temperature sensor disconnected at PC board.
Check
Check for loose or broken wire connections at J10 on PC board.
Solution
Secure wire connections.
Cause
Boiler temperature sensor not functioning properly.
Check: Perform Temperature Sensor Resistance Test.
Solution
Replace boiler temperature sensor.
Cause: PC Board is not processing temperature input(s) properly.
Check
Verify boiler temperature sensor is working properly.
Solution
Replace PC board, if necessary.
Error Code C773
Display / Symptom
HEAT UP MODE BOILER TEMP OVER LIMIT
ITEMS NOT STERILE TURN POWER OFF/ON
Boiler temperature is greater than 340° F (171° C)
Cause: Steam not being released from chamber (Potential blockage/obstruction).
Check 1a
Check for obstruction in plastic tube connecting unit to external condensing tank.
Solution 1a
Unkink plastic tube, remove obstruction, or replace.
Check 1b
Check copper coil in external condensing tank for blockage or damage.
Solution 1b
Clear obstruction or replace copper coil.
Check 1c
Check vent port in chamber for blockage. Check filter for blockage.
Solution 1c
Clear obstruction in vent port. Clean or replace filter.
Check 1d
Check vent valve for blockage. Put unit into Service Diagnostics and check vent
valve operation.
Solution 1d
Clean or replace vent valve.
Cause: Boiler temperature sensor disconnected at PC board.
Check
Check for loose or broken wire connections at J10 on PC board.
Solution
Secure wire connections.
Cause
Boiler temperature sensor not functioning properly.
Check: Perform Temperature Sensor Resistance Test.
Solution
Replace boiler temperature sensor.
Cause: PC Board is not processing temperature input(s) properly.
Check
Verify boiler temperature sensor is working properly.
Solution
Replace PC board, if necessary.
Error Code C774
Display / Symptom
STERILIZE MODE BOILER TEMP OVER LIMIT
ITEMS NOT STERILE TURN POWER OFF/ON
Boiler temperature is greater than 340° F (171° C)
Cause: Steam not being released from chamber (Potential blockage/obstruction).
Check 1a
Check for obstruction in plastic tube connecting unit to external condensing tank.
Solution 1a
Unkink plastic tube, remove obstruction, or replace.
Check 1b
Check copper coil in external condensing tank for blockage or damage.
Solution 1b
Clear obstruction or replace copper coil.
Check 1c
Check vent port in chamber for blockage. Check filter for blockage.
Solution 1c
Clear obstruction in vent port. Clean or replace filter.
Check 1d
Check vent valve for blockage. Put unit into Service Diagnostics and check vent
valve operation.
Solution 1d
Clean or replace vent valve.
Cause: Boiler temperature sensor disconnected at PC board.
Check
Check for loose or broken wire connections at J10 on PC board.
Solution
Secure wire connections.
Cause
Boiler temperature sensor not functioning properly.
Check: Perform Temperature Sensor Resistance Test.
Solution
Replace boiler temperature sensor.
Cause: PC Board is not processing temperature input(s) properly.
Check
Verify boiler temperature sensor is working properly.
Solution
Replace PC board, if necessary.
Error Code C775
Display / Symptom
VENT MODE BOILER TEMP OVER LIMIT
ITEMS NOT STERILE TURN POWER OFF/ON
Boiler temperature is greater than 340° F (171° C)
Cause: Steam not being released from chamber (Potential blockage/obstruction).
Check 1a
Check for obstruction in plastic tube connecting unit to external condensing tank.
Solution 1a
Unkink plastic tube, remove obstruction, or replace.
Check 1b
Check copper coil in external condensing tank for blockage or damage.
Solution 1b
Clear obstruction or replace copper coil.
Check 1c
Check vent port in chamber for blockage. Check filter for blockage.
Solution 1c
Clear obstruction in vent port. Clean or replace filter.
Check 1d
Check vent valve for blockage. Put unit into Service Diagnostics and check vent
valve operation.
Solution 1d
Clean or replace vent valve.
Cause: Boiler temperature sensor disconnected at PC board.
Check
Check for loose or broken wire connections at J10 on PC board.
Solution
Secure wire connections.
Cause
Boiler temperature sensor not functioning properly.
Check: Perform Temperature Sensor Resistance Test.
Solution
Replace boiler temperature sensor.
Cause: PC Board is not processing temperature input(s) properly.
Check
Verify boiler temperature sensor is working properly.
Solution
Replace PC board, if necessary.
Error Code C776
Display / Symptom
OPEN MODE BOILER TEMP OVER LIMIT
ITEMS NOT STERILE TURN POWER OFF/ON
Boiler temperature is greater than 340° F (171° C)
Cause: Steam not being released from chamber (Potential blockage/obstruction).
Check 1a
Check for obstruction in plastic tube connecting unit to external condensing tank.
Solution 1a
Unkink plastic tube, remove obstruction, or replace.
Check 1b
Check copper coil in external condensing tank for blockage or damage.
Solution 1b
Clear obstruction or replace copper coil.
Check 1c
Check vent port in chamber for blockage. Check filter for blockage.
Solution 1c
Clear obstruction in vent port. Clean or replace filter.
Check 1d
Check vent valve for blockage. Put unit into Service Diagnostics and check vent
valve operation.
Solution 1d
Clean or replace vent valve.
Cause: Boiler temperature sensor disconnected at PC board.
Check
Check for loose or broken wire connections at J10 on PC board.
Solution
Secure wire connections.
Cause
Boiler temperature sensor not functioning properly.
Check: Perform Temperature Sensor Resistance Test.
Solution
Replace boiler temperature sensor.
Cause: PC Board is not processing temperature input(s) properly.
Check
Verify boiler temperature sensor is working properly.
Solution
Replace PC board, if necessary.
Error Code C777
Display / Symptom
DRY MODE BOILER TEMP OVER LIMIT
ITEMS NOT STERILE TURN POWER OFF/ON
Boiler temperature is greater than 340° F (171° C)
Cause: Steam not being released from chamber (Potential blockage/obstruction).
Check 1a
Check for obstruction in plastic tube connecting unit to external condensing tank.
Solution 1a
Unkink plastic tube, remove obstruction, or replace.
Check 1b
Check copper coil in external condensing tank for blockage or damage.
Solution 1b
Clear obstruction or replace copper coil.
Check 1c
Check vent port in chamber for blockage. Check filter for blockage.
Solution 1c
Clear obstruction in vent port. Clean or replace filter.
Check 1d
Check vent valve for blockage. Put unit into Service Diagnostics and check vent
valve operation.
Solution 1d
Clean or replace vent valve.
Cause: Boiler temperature sensor disconnected at PC board.
Check
Check for loose or broken wire connections at J10 on PC board.
Solution
Secure wire connections.
Cause
Boiler temperature sensor not functioning properly.
Check: Perform Temperature Sensor Resistance Test.
Solution
Replace boiler temperature sensor.
Cause: PC Board is not processing temperature input(s) properly.
Check
Verify boiler temperature sensor is working properly.
Solution
Replace PC board, if necessary.
Error Code C778
Display / Symptom
COMPLETE MODE BOILER TEMP OVER LIMIT
ITEMS NOT STERILE TURN POWER OFF/ON
Boiler temperature is greater than 340° F (171° C)
Cause: Steam not being released from chamber (Potential blockage/obstruction).
Check 1a
Check for obstruction in plastic tube connecting unit to external condensing tank.
Solution 1a
Unkink plastic tube, remove obstruction, or replace.
Check 1b
Check copper coil in external condensing tank for blockage or damage.
Solution 1b
Clear obstruction or replace copper coil.
Check 1c
Check vent port in chamber for blockage. Check filter for blockage.
Solution 1c
Clear obstruction in vent port. Clean or replace filter.
Check 1d
Check vent valve for blockage. Put unit into Service Diagnostics and check vent
valve operation.
Solution 1d
Clean or replace vent valve.
Cause: Boiler temperature sensor disconnected at PC board.
Check
Check for loose or broken wire connections at J10 on PC board.
Solution
Secure wire connections.
Cause
Boiler temperature sensor not functioning properly.
Check: Perform Temperature Sensor Resistance Test.
Solution
Replace boiler temperature sensor.
Cause: PC Board is not processing temperature input(s) properly.
Check
Verify boiler temperature sensor is working properly.
Solution
Replace PC board, if necessary.
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. →