Midmark M11 - Page 46

English-46
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:
C647 - continued
C647: DRY MODE
PRESSURE HIGH
PUSH STOP TO RESTART
Gauge pressure inside chamber is equal to
or greater than
2.18 psi (15 kPa) during DRY mode,
or 0.7 psi (5 kPa) during DOOR mode.
If Door did not open before DRY mode.... - continued
Door / Dam gasket(s). Inspect door / dam gaskets for proper
installation and any signs of sticking.
Install door / dam gaskets properly.
If new gasket, check if wire ring in
gasket is preventing gasket from fully
being seated.
Temporarily remove wire ring.
Re-install wire ring after gasket is fully seated.
Trays not pushed in properly. Be sure trays slide in properly. Remove obstructions that prevent the
trays from sliding in completely.
Door pins / latch binding. With door open, door handle should
move Up / Down freely.
Clean door pins / latch mechanism.
(Clean with Synthetic Dry Protectant - Aerosol /
Spray on)
Inspect latch mechanism for wear / damage. Replace worn / damaged components.
Door motor system / latch
“hanging up”.
Remove the door cover, and RH side panel. With
the door closed, run the
‘Door Open Test’. Watch for any
mechanical issues that may prevent the
door from opening. Refer to:
Service Diagnostics (I/O Test)
Replace worn / damaged components.
Verify Door Motor is angled as close to
PC board as possible.
Adjust door motor angle.
Place in Service Diagnostics Mode.
With the door closed, run the Door
Open Test. Watch for any mechanical
issues that may prevent full rotation of
door motor cam.
Refer to: Service Diagnostics
Replace door motor.
Check if the connecting rod is installed in the
proper location on the door motor cam.
(9 for M9, 11 for M11)
Install connecting rod in the proper
9 or 11 location on the door motor cam.
If Door did open before DRY mode....
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)
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