Midmark M11 - Page 68

English-68
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:
C985
Note: An error code beginning
with “C98” means the high-limit
thermostat is tripped open.
This is normally due to lack
of water in the chamber.
C985: VENT MODE
HI-LIMIT OPEN
UNPLUG / REPLUG UNIT
High-limit thermostat opened for at
least 0.25 seconds during VENT mode.
Hi Limit thermostat malfunctioning. If error code does not reset…
Perform: Thermostat Continuity Test
Meter Reading - Anything but OL
Replace thermostats.
Loose / Damaged wire connection. Check wire connections at high-limit
thermostat and at J5 on Main PC Board.
Secure / Repair loose or damaged wire
connections.
Pressure Leaks. Check for loose / worn door and dam
gaskets or water leaking around door.
Verify door and dam gaskets are
installed properly.
(Replace gasket kit 1x year)
Clean / Replace gaskets.
Replacement fill / vent valve solenoid
requires rectifier harness for DC coil.
Install rectifier harness.
Check for voltage flow through rectifier
harness. Refer to:
Fill / Vent Valve Supply Voltage Test
Replace rectifier harness.
Leaking or defective vent valve.
(Check for water leaking from condensing
coil spout)
Perform: Vent Valve Test
Clean / Replace vent valve.
Leaking or defective fill valve.
Check for water leaking back into reservoir thru
the fill line.
(Look for bubbles coming from bottom of
reservoir) Perform: Fill Valve Test
Clean / Replace fill valve.
Leaking or defective air valve.
Check for excessive steam coming
thru condensing coil spout.
NOTE: During the HEAT & VENT
modes, it is normal for steam to be
exhausted thru the spout.
Clean / Replace air valve.
Leaking or defective Pressure Relief
Valve. Check for water / steam leakage
from beneath the rear of the sterilizer.
Perform: Pressure Relief Valve Test
Replace pressure relief valve.
Pressure transducer tubing leaking.
Check for steam leakage at pressure
transducer tubing connections.
Secure pressure transducer tubing
connections with high temperature cable ties.
Check all plumbing fitting connections for
leakage.
Tighten or replace fittings.
Heating element malfunctioning.
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)
Replace heating element.
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