M9/M11 Sterilizer Temperature Sensor Test and Repair
Some procedures require power to be connected with covers removed. Line voltage is present. Use extreme caution to prevent electric shock.
Model Range -020 thru -022, -033, -034
|
Model |
M9M11 -020 thru -022, -033, -034 |
| Serial Number |
All |
Temperature Sensor: Resistance Test
1.Allow sensor to cool to room temperature before testing.
2.Disconnect sensor harness from J12 on PC board.
3.Set meter to 2K Ω.
4.Place meter probes on red and white sensor wires as shown.
| Meter Reading | Required Action |
|---|---|
|
Acceptable range: 1.07 to 1.1 kΩ |
Perform Supply Voltage Test |
|
Any reading out of the acceptable range |
Replace temperature sensor |
Temperature Sensor: Supply Voltage Test
1.Disconnect sensor harness from J12 on PC board.
2.Set meter to 20 VDC.
3.At J12 on PC board, place meter probes on pins 1 and 2 as shown.
| Meter Reading | Required Action |
|---|---|
|
Acceptable range: 4.0 to 6.0 VDC |
Main PC board is OK |
|
Any reading out of the acceptable range |
Replace Main PC board |
Model Range -040 thru -043
|
Model |
M9/M9D/M11 -040 thru -043 |
| Serial Number | All |
Temperature Sensor: Resistance Test
1.Allow sensor to cool to room temperature before testing.
2.Disconnect sensor harness from J12 on PC board.
3.Set meter to 2K Ω.
4.Place meter probes on red and white sensor wires as shown.
| Meter Reading | Required Action |
|---|---|
|
Acceptable range: 1.07 to 1.1 kΩ |
Perform Supply Voltage Test |
|
Any reading out of the acceptable range |
Replace temperature sensor |
Temperature Sensor: Supply Voltage Test for all Models and voltages prior to Serial Number V2483296
1.Disconnect sensor harness from J12 on PC board.
2.Set meter to 20 VDC.
3.At J12 on PC board, place meter probes on pins 1 and 2 as shown.
| Meter Reading | Required Action |
|---|---|
|
Acceptable range: 4.0 to 6.0 VDC |
Main PC board is OK |
|
Any reading out of the acceptable range |
Replace Main PC board |
Temperature Sensor: Supply Voltage Test - 115V for Models -040, -042 and -043 from V2483296 to Present
1.Disconnect sensor harness from J12 on PC board.
2.Set meter to 20 VDC.
3.At J12 on PC board, place meter probes on pins 1 and 2 as shown.
| Meter Reading | Required Action |
|---|---|
|
Acceptable range: 3.0 to 4.0 VDC |
Main PC board is OK |
|
Any reading out of the acceptable range |
Replace Main PC board |
Temperature Sensor: Supply Voltage Test - 230v For Model -041 from V2544018 to Present
1.Disconnect sensor harness from J12 on PC board.
2.Set meter to 20 VDC.
3.At J12 on PC board, place meter probes on pins 1 and 2 as shown.
| Meter Reading | Required Action |
|---|---|
|
Acceptable range: 3.0 to 4.0 VDC |
Main PC board is OK |
|
Any reading out of the acceptable range |
Replace Main PC board |
Temperature Sensor: Supply Voltage Test - 115v For Model M9D -042 from V2514604 to Present
1.Disconnect sensor harness from J12 on PC board.
2.Set meter to 20 VDC.
3.At J12 on PC board, place meter probes on pins 1 and 2 as shown.
| Meter Reading | Required Action |
|---|---|
|
Acceptable range: 3.0 to 4.0 VDC |
Main PC board is OK |
|
Any reading out of the acceptable range |
Replace Main PC board |
