Figure 187 Control Unit With Membrane
15. The Pre-Alarm and Slowdown Alarm values for each detector are reset to their original values see
Figure 52.
6.1.2 CONTROL UNIT MEMBRANE
A new Control Unit Lid will be supplied fitted with the Membrane.
1. Unscrew the 4 screws to remove the Control Unit Lid
2. Disconnect the ribbon cables from the Control Unit lid taking care not to damage the pins and
contacts. The ribbon cables are removed from the lid connectors not the PCB. There is no
requirement to remove the metal can from the PCB.
Figure 188 Ribbon Cable Removal
3. Fit new lid in reverse
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