English-41
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:
C633 - continued
C633: HEATUP MODE
PRESSURE LOW
ITEMS NOT STERILE
UNPLUG / REPLUG UNIT
This will occur if chamber pressure
does not reach 1 psi within one
minute after air valve closes; or if
chamber pressure does not reach
4.93 psi within 25 minutes after
starting the HEAT UP mode.
If the unit is not building temperature....
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.
Inspect heating element wires for corrosion or if
disconnected.
Reconnect / Replace heating element
wires.
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:
C634
C634: STERILIZE MODE
PRESSURE LOW
ITEMS NOT STERILE
UNPLUG / REPLUG UNIT
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.
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.
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.
Check all plumbing fitting connections for
leakage.
Tighten or replace fittings.
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