M9/M11 Sterilizer Heating Element 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 |
Heating Element: Supply Voltage Test
1.Back wire terminals slightly off J3 and J4 on PC board leaving them still attached.
2.Set meter to VAC.
3.Activate the Service Diagnostics mode.
4.Initiate the I/O Test.
5.Energize the Steam Heater. The heating element will energize for approximately 15 seconds, then shut off.
6.Place meter probes on J3 and J4 on PC board.
| Meter Reading | Required Action |
|---|---|
|
Line voltage 120 or 230 VAC. |
PC board is OK |
|
Any reading other than line voltage |
Replace PC board |
Heating Element: Resistance Test
1.Remove the bottom cover.
2.Disconnect wires from heating element terminals.
3.Set meter to 200 Ω.
4.Place meter probes on heating element terminals.
| Meter Reading | Required Action |
|---|---|
|
115V models: 9 to 11 Ω |
Perform PC Board Relay Test |
|
230V models: 34 to 42 Ω |
Perform PC Board Relay Test |
| Any reading out of the acceptable range | Replace heating element |
Model Range -040 thru -043
|
Model |
M9M11 -040 thru -043 |
| Serial Number | All |
Heating Element: Supply Voltage Test
This test must be done under a “loaded” condition leave terminals attached for an accurate reading.
1.Back wire terminals slightly off J3 and J4 on PC board leaving them still attached.
2.Set meter to VAC.
3.Activate the Service Diagnostics mode.
4.Initiate the I/O Test.
5.Place meter probes on J3 and J4 on PC board.
6.Energize the Steam Heater. LED D16 should light up. The heating element will energize for approximately 15 seconds, then shut off.
| Meter Reading | Required Action |
|---|---|
|
Line voltage 120 or 230 VAC. |
PC board is OK |
|
Any reading other than line voltage |
Replace PC board |
Heating Element: Resistance Test
1.Remove the bottom cover.
2.Disconnect wires from heating element terminals.
3.Set meter to 200 Ω.
4.Place meter probes on heating element terminals.
| Meter Reading | Required Action |
|---|---|
|
115V models: 9 to 11 Ω |
Perform PC Board Relay Test |
|
230V models: 34 to 42 Ω |
Perform PC Board Relay Test |
| Any reading out of the acceptable range | Replace heating element |
