Maintaining
There is little maintenance to do on the Wondrwall system, other than changing
batteries in the siren, thermostat (if batteries are fitted) and key fobs:
Siren:
1. Remove the cover (page 19).
2. Switch the battery switch to OFF (A).
3. Unscrew the two fixing screws on the
battery compartment lid (B) and remove
the lid.
4. Remove the old batteries. Press the tamper
switch (C) twice to fully discharge the siren.
5. Insert new batteries. You will need two 1.5V
alkaline D-cell / MN1300 / LR20 batteries.
6. Replace the battery compartment lid (B)
and switch the battery switch (A) to ON.
7. Replace the siren cover (page 20).
C
B
A
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