Danfoss DLX 4.6 Guia do Utilizador descarregar pdf (Página 79)

User Guide DLX Series L00410623-1 79

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 damage or overheating, i.e.

warm conductors or surface corrosion. Replace frayed conductors immediately, find and fix

the reason for the damage!

8.2.3. Electrical Connection

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!

8.2.5. DC Disconnect Switch

To prevent welding of the contacts, thereby extending service life, the DC switch(es) must

be operated at least once every 12 months, preferably at night or when the AC is OFF.

8.2.6. Inverter

It is recommended that the inside of the inverter is checked by the system installer for

humidity and dust every 3 – 4 years.

8.2.7. Ventilation

The heat sink on the back of the inverter conducts heat away from the electronic

components, and must be clean to ensure sufficient cooling performance and thereby

prevent yield losses. This is accomplished by using either:

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Danfoss DLX 4.6 Guia do Utilizador Página 79