16 Maintenance
16.1
Controller
The controller is basically maintenance-free. Despite this, it is a good idea to regularly check that the
cooling fins on the front and rear sides of the device are free of dust. Clean the device when neces-
sary as described below.
16.1.1 Removing dust
Dust should be removed using compressed air (max. 2 bar).
16.1.2 Removing heavy soiling
1. Switch off loads, solar module and battery, as described in section 9.1.
2. Remove heavy soiling with a slightly damp cloth (use clear water). If necessary, use a 2 %
hard soap solution instead of water. After cleaning, remove any soap residue using a slightly
damp cloth.
3. Switch on the battery, solar module and loads.
ATTENTION!
Danger of damage to components.
– Do not allow cleaning agents or objects to enter the inside of the controller from the front
(gaps around the operating elements).
– Do not use especially the following cleaning agents:
– Solvent-based cleaning agents
– Disinfection agents
– Coarse or sharp-edged cleaning agents
DANGER!
Risk of death by electrocution! Use cleaning agents only with a slightly damp cloth.