Midmark M11 - Page 43

English-43
004-1032-00
TP210 Rev. A
© 2012 Midmark Corp. | 60 Vista Drive Versailles, OH 45380 USA | 1-800-643-6275 | 1-937-526-3662 |
[Revised: 8/15/17]
Troubleshooting Chart - continued
Problem Display / Symptom Cause Check Action
Error Code:
C642 - continued
C642: FILL MODE
PRESSURE HIGH
ITEMS NOT STERILE
PUSH STOP TO RESTART
PC Board malfunctioning.
Perform: Heating Element Supply
Voltage Test (With harness attached
to leads should have line voltage in
test mode)
Replace Main PC board.
Perform: Main PC Board Relay Test
(Check TP1 & TP2 for an acceptable range: 10
to 14 VDC)
Perform: Main PC Board Pressure
Transducer Voltage Test
(Acceptable range: 4.0 to 6.0 VDC)
Error Code:
C643
C643: HEATUP MODE
PRESSURE HIGH
ITEMS NOT STERILE
PUSH STOP TO RESTART
Sterilizer overloaded. Check the size of the load.
(Refer to User Guide)
Reduce load size.
Chamber filter clogged. Check if chamber filter is clogged. Clean / Replace filter.
(Clean with Speed-Clean and brush)
Maintenance not performed. Verify weekly & monthly maintenance has been
performed by customer.
Refer to User Guide.
Perform monthly maintenance.
Defective Air valve.
Leaking or defective air valve.
Perform: Air Valve Test
Check for excessive steam coming
thru condensing coil spout.
Clean / Replace air valve.
Temperature sensor malfunctioning. Check for residue build up on temperature
sensor probe.
Clean sensor probe with Speed-Clean,
distilled water, and abrasive pad.
Check that nothing is touching or crowding
the temperature sensor.
(Example: trays, pouches, cassettes, etc.)
Reposition items so nothing touches or
crowds the temperature sensor.
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
Replace temperature sensor.
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
Replace Main PC board.
Pressure tubing at incorrect angle. Check tubing for restrictions and
ensure tubing is angled down and
away from the PC Board.
Adjust pressure tubing to correct angle.
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Style A