Midmark M9® -05x / M11® -05x Sterilizer Wiring Diagram
To prevent risk of shock always disconnect power before removing covers or performing any service procedure.
Some procedures require power to be connected with covers removed. Line voltage is present. Use extreme caution to prevent electric shock.
|
Model |
M9 -050, -053 | M11 -050, -051, -053 |
| Serial Number | All | All |
Harness Part Numbers
|
Item |
Part Number |
Description |
|---|---|---|
|
1 |
015-11090-00 |
Water Level Sensor Harness |
|
2 |
015-1680-00 | Steam Temp. Sensor Harness |
|
3 |
015-11094-00 |
Air/Autofill Valve Harness |
|
4 |
015-11092-00 |
Fill/Vent Valve Harness |
|
5 |
015-11086-00 |
Input Power |
|
6 |
015-11087-00 |
Input Chassis Ground |
|
7 |
015-11100-00 |
Power Supply Input Harness |
|
8 |
015-11085-00 |
Heater Thermostat Harness |
|
9 |
015-1640-00 |
Thermostat Wire |
|
10 |
002-10899-00 |
Door Switch and Sensor Harness Kit |
|
11 |
002-10898-00 |
Door Motor / Limit Switch Harness |
|
12 |
015-11101-00 |
Power Supply Output Harness |
|
13 |
015-11102-01 |
PCB CAN to Display Harness |
|
14 |
015-11975-00 |
Fan Extension Harness |
|
15 |
015-11102-00 |
Display CAN Harness - not shown |
|
16 |
015-11480-00 |
USB Cable - not shown |
|
17 |
015-11481-00 |
Ethernet Cable - not shown |
Troubleshooting LEDs
|
LED Description |
LED |
Color |
System State When ON |
|---|---|---|---|
|
Isolated 12V power |
D27 |
Green |
Isolated 12V power is functional. |
|
12V power |
D24 |
Green |
12V power is functional. |
|
5V power |
D23 |
Green |
5V power is functional. |
|
3.3V power |
D22 |
Green |
3.3V power is functional. |
|
Sterilization MCU status (flashing) |
D34 |
Green |
Sterilization MCU firmware is running. |
|
Sensor MCU error |
D7 |
Red |
Sterilization MCU firmware is an error condition. |
|
Door Dry position |
D53 |
Green |
Door is in Dry position. |
|
Chamber water level |
D52 |
Green |
Chamber is full. |
|
Door Motor output |
D2 |
Green |
Door Motor output is active. |
|
Door Motor hall effect switch |
D55 |
Green |
Door Motor is in the Home position. |
|
Fan output 0 (lower fan) |
D19 |
Green |
Fan 0 output is on. |
|
Fan output 1 (lower fan) |
D20 |
Green |
Fan 1 output is on. |
|
Fan output 2 (lower fan) |
D17 |
Green |
Fan 2 output is on. |
|
Air valve output |
D11 |
Green |
Air valve output is activated. |
|
Autofill valve output |
D12 |
Green |
Autofill valve output is activated. |
|
Autofill overflow probes |
D54 |
Red |
Water is contacting the overflow probes. |
|
Fill valve output |
D6 |
Green |
Fill valve output is on. |
|
Vent valve |
D8 |
Green |
Vent valve output is on. |
|
Door switch status |
D47 |
Green |
Door is closed. |
|
High-limit thermostat |
D48 |
Red |
Thermostat is tripped. |
|
Heater status |
D51 |
Green |
Power is applied to heater output. |
Troubleshooting Test Points
|
Test Point Description |
Input/ |
Test Point Pos + |
Test Point Neg - |
Expected Reading 115 V Model |
Expected Reading 230 V Model |
|---|---|---|---|---|---|
|
AC Line Voltage In - Not Fused |
Voltage |
TP269 |
TP272 |
115 VAC |
230 VAC |
|
AC Line Voltage - Fused |
Voltage |
TP270 |
TP273 |
115 VAC |
230 VAC |
|
AC Voltage Output to Power Supply |
Voltage |
TP266 |
TP273 |
115 VAC |
230 VAC |
|
Isolated 12V |
Voltage |
TP271 |
TP299 |
12 VDC |
12 VDC |
|
12V Net
|
Voltage |
TP291 |
TP292 |
12 VDC |
12 VDC |
|
5V Net |
Voltage |
TP294 |
TP292 |
5 VDC |
5 VDC |
|
3.3V Net |
Voltage |
TP293 |
TP292 |
3.3 VDC |
3.3 VDC |
|
12V Motor Output |
Voltage |
TP304 |
TP69 |
12 VDC |
12 VDC |
|
Door Dry Position Switch Input |
Input |
TP227 |
TP292 |
Door Closed 3.3 VDC / Door In Dry Position 0 VDC / Door Open Past Dry Position 3.3 VDC |
Door Closed 3.3 VDC / Door In Dry Position 0 VDC / Door Open Past Dry Position 3.3 VDC |
|
Chamber Water Level Input |
Input |
TP711 |
TP292 |
Contacted 0 VDC / Not Contacted 3.3 VDC |
Contacted 0 VDC / Not Contacted 3.3 VDC |
|
Door Motor Output |
Output |
TP367 |
TP292 |
Activated 0 VDC / Not Activated 12 VDC |
Activated 0 VDC / Not Activated 12 VDC |
|
Hall Effect Switch Input |
Input |
TP392 |
TP292 |
Home Position 0 VDC / Not in Home Position 12 VDC |
Home Position 0 VDC / Not in Home Position 12 VDC |
|
Fan Output 0 (lower fan) |
Output |
Black Wire |
TP292 |
Activated 0 VDC / Not Activated 12 VDC |
Activated 0 VDC / Not Activated 12 VDC |
|
Fan Output 1 (lower fan) |
Output |
Black Wire |
TP292 |
Activated 0 VDC / Not Activated 12 VDC |
Activated 0 VDC / Not Activated 12 VDC |
|
Fan Output 2 (upper fan) |
Output |
Black Wire |
TP292 |
Activated 0 VDC / Not Activated 12 VDC |
Activated 0 VDC / Not Activated 12 VDC |
|
Air Valve Output |
Output |
TP108 |
TP127 |
Activated 108 VDC / Not Activated 0 VDC |
Activated 216 VDC / Not Activated 0 VDC |
|
Autofill Valve Output |
Output |
TP105 |
TP155 |
Activated 115 VAC / Not Activated 0 VAC |
Activated 230 VAC / Not Activated 0 VAC |
|
Autofill Overflow Detection Circuit |
Input |
TP465 |
TP292 |
Contacted 0 VDC / Not Contacted 1.65 VDC |
Contacted 0 VDC / Not Contacted 1.65 VDC |
|
Fill Valve Output |
Output |
TP75 |
TP74 |
Activated 108 VDC / Not Activated 0 VDC |
Activated 216 VDC / Not Activated 0 VDC |
|
Vent Valve Output |
Output |
TP73 |
TP72 |
Activated 108 VDC / Not Activated 0 VDC |
Activated 216 VDC / Not Activated 0 VDC |
|
Heater Output |
Output |
TP89 |
TP88 |
Activated 115 VAC / Not Activated 0 VAC |
Activated 230 VAC / Not Activated 0 VAC |
|
Thermostat Voltage |
Input |
TP86 |
TP88 |
Thermostat Not Tripped 115 VAC / Tripped 0 VAC |
Thermostat Not Tripped 230 VAC / Tripped 0 VAC |
|
Door Switch Input |
Input |
TP57 |
TP273 |
Door Closed and Thermostat Not Tripped 115 VAC Door Open or Thermostat Tripped 0 VAC |
Door Closed and Thermostat Not Tripped 230 VAC Door Open or Thermostat Tripped 0 VAC |
|
Door Switch Monitoring Circuit |
Input |
TP402 |
TP292 |
Door Open or Thermostat Tripped 3.3 VDC Door Closed and Thermostat Not Tripped 0 VDC |
Door Open or Thermostat Tripped 3.3 VDC Door Closed and Thermostat Not Tripped 0 VDC |
|
Thermostat Detect Circuit |
Input |
TP415 |
TP292 |
Thermostat Tripped 3.3 VDC / Not Tripped 0 VDC |
Thermostat Tripped 3.3 VDC / Not Tripped 0 VDC |
|
Heater Status Detection |
Input |
TP498 |
TP292 |
Activated 0 VDC / Not Activated 3.3 VDC |
Activated 0 VDC / Not Activated 3.3 VDC |
