20 en | Maintenance PLENA Mixer amplifier, 4-zone, 240W
2019-03 | V1.1 | Operation manual Bosch Security Systems B.V.
9 Maintenance
The unit requires minimum maintenance. However, to keep it in good condition, the following
tasks should be carried out.
Clean the unit
– Periodically clean the unit with a damp, lint-free cloth.
Clean the air inlets
– The unit can collect dust from operation. Clean the air inlets at least once a year.
Check the connectors and grounding
– Periodically check:
– All cable connections for corrosion and the screw terminals to make sure that they
have not become loosened.
– The ground (Protective Earth) connection of the unit.