Fisher & Paykel MR850 manual 38

Figure 7.4 Showing Humidifier Power PCB wiring

7.2.4Replacement of Transformer

1.Open the case (section 7.2.1).

2.Disconnect the transformer primary and secondary harnesses attached to the power PCB.

3.Unscrew the four mounting screws fixing the transformer, and remove the transformer from the case.

4.Place the new transformer inside the case, and mount using the four screws.

5.Connect transformer primary and secondary harnesses to the power PCB.

6.Close the case (section 7.2.8).

7.2.5Servicing the Heater Plate

Resetting the thermal cutout.

1.Open the case (section 7.2.1).

2.Check the thermal cutout on the heater plate by pushing the red button with a pen or small screwdriver - see Figure 7.5.

Figure 7.5 Showing location of thermal cutout

38 MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041340 (185041713 internal)