Bosch Worcester Greenstar CDi Compact ErP Series - Access to Boiler Control Components; Replacing the Control Unit

SERVICE AND SPARES
CDi Compact
ErP
- 6 720 813 276 (2015/07) 57
7.8.29 Access to boiler control components
1. Release the three captive screws retaining the installer access cover.
2. The access cover can now be removed with the flap.
Fig. 115 Installer access cover
PCB fuse
The fuse is located next to the high voltage connectors and the spare
fuse (1) is located on the back of the access cover.
To remove the fuse:
1. Push the top of the fuse holder up.
2. Rotate the top of the fuse holder anti-clockwise and remove.
Fig. 116 Fuse holder
7.8.30 Replacing the control unit
With the installer access cover removed:
1. Remove all the connectors
2. Slide out all the cable strain relief clamps
Fig. 117 Disconnect external connections
With the control unit in the service position:
1. Remove the single cover retaining screw.
2. Release the catches and remove the access cover.
▶ Lift the HCM (3) from the retainer and disconnect the cable, keep the
HCM to fit into the new control unit.
▶ Disconnect and remove all cables and connectors from the control
unit.
▶ Remove the pressure gauge, refer to section 7.8.21.
1.
6720646608-67.1Wo
2.
The control unit is supplied in a plastic housing. The
complete unit must be replaced.
The HCM must be exchanged from the old to the new
control unit.
1
6720646608-68.1Wo
1.
2.
2.
6720646608-73.1Wo
1.