Technical data

13.0 Changing Components

13.12 PCB (Fig. 57)

WARNING: The PCB Control and Fan

Assembly is 325 Vdc. Isolate at supply

before access.

1. Pull the control knob off its spindle and remove the

plastic button cover. Refit them onto the new PCB

(Fig. 57a).

2. Release the facia securing screws (

turn) and hinge

down the facia panel.

3. Remove the screws securing the PCB connection

cover.

4. Remove the screws securing the control board and

disconnect the electrical connections noting their

positions although they are one way fitting.

NOTE: Check the PCB for the presence of input

jumpers - see section 8.7. Set the new PCB as the

original.

5. Fit the new PCB and reassemble in reverse order.

Fig. 57

Facia Panel

Facia Securing Screws

PCB

Control Knob

Fig. 57a

PCB Connection Cover

Plastic Button

Cover