M9/M11 Sterilizer Main PC Board Test and Repair

Model

 M9M11 -020 thru -022, -033, -034
Serial Number All

This test checks for proper supply voltage to all of the following components: Heating Element, Door Motor, Fill / Vent Valve, Air Valve.

M9/M11 Sterilizer Main PC Board

1.Set meter to 20 VDC.

2.Place black meter probe on TP2 as shown.

3.Place red meter probe on TP1 as shown.

Meter Reading Required Action

Acceptable range: 10 to 14 VDC

Main PC board is OK

Any reading out of the acceptable range

Replace Main PC board

This test checks for proper supply voltage to pressure transducer.

M9/M11 Sterilizer Main PC Board

*Pin position is referenced top to bottom. Top pin = 1, bottom pin=4

1.Set meter to 20 VDC.

2.Place meter probes on transducer pins 1 and 3* 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

 M9M11 -040 thru -043
Serial Number All
WARNING

Some procedures require power to be connected with covers removed. Line voltage is present. Use extreme caution to prevent electric shock.

M9/M11 Sterilizer Main PC Board

1.Set meter to 20 VDC.

2.Place black meter probe on TP2 as shown.

3.Place red meter probe on TP1 as shown. +12 VDC

4.Place red meter probe on TP3 as shown. +5 VDC

5.Place red meter probe on TP4 as shown. +5 VDC

Meter Reading Required Action
TP2 - TP1 acceptable range: 10 to 14 VDC Main PC board is OK
TP 2 - TP3 and TP 2 - TP4 acceptable range: 4 to 6 VDC

Main PC board is OK
Any reading out of the acceptable range

Replace Main PC board

This test checks for proper supply voltage to pressure transducer.

M9/M11 Sterilizer Main PC Board

1.Set meter to 20 VDC

2.Place meter probes on transducer pins 1 and 3* as shown.

*Pin position is referenced top to bottom. Top pin = 1, bottom pin=4

Meter Reading Required Action

Acceptable range: 4 to 6 VDC

Main PC board is OK

Any reading out of the acceptable range

Replace Main PC board