Regular System Inspections - Eltek Valere Theia He-t User Manual

8.2. Regular System Inspections

The THEIA HE-t inverters are manufactured to operate trouble-free for several years.
Performing regular maintenance will ensure high efficiency and a long service life.
CAUTION: Only qualified persons to perform work inside the inverter!
Maintenance work involving removal of the inverter covers must be performed by
qualified persons only, due to damage to electrical components and the warranty of
the product.
8.2.1. Modules
Maintain the PV modules as recommended from the manufacturer.
8.2.2. Cables
Regularly check the cables inside and outside for signs of overheating, i.e. warm conductors
or surface corrosion. Replace frayed conductors immediately, find and fix the reason for the
damage!
8.2.3. Fixing Points
Regularly check that the terminals and plugs are firmly tightened, and that the insulation is
not deteriorated or corroded. If a combiner box is used, also check the terminals and plugs in
the combiner box!
8.2.4. Fuses/Circuit Breakers
Frequently blown fuses or tripped circuit breakers are a clear warning sign of overload, short
circuit or ground fault.
• Always determine the reason for blown fuses/tripped circuit breakers prior to
replacement/resetting.
• The replacement/resetting must be performed by qualified persons only!
68
User Manual THEIA HE-t String Inverters
357115.013, Issue 1.0, 2011 March