A correction factor (
) should be applied for determining the fuse rated current working at different
temperatures. Please confirm the final fuse selection with the qualified design institutes and fuse
manufacturer. The maximum series fuse rating value on the products’ datasheet provided by Trina
Solar should be used for reference only.
7 PV MODULE MAINTENANCE
7.1 VISUAL INSPECTION AND REPLACEMENT
The modules must be inspected and maintained regularly, which is the responsibility of the users.
The circuit breaker should be disconnected before the inspection. If the modules are damaged, such
as broken glass, broken cables, and damaged junction boxes, it may cause functional and safety
failures. If the module is damaged, replace the damaged module with a new module of the same
type. Do not touch the live part of the cable or connector.
It is recommended to perform a preventive inspection every six months, and do not replace
components of modules without authorization. If electrical or mechanical performance inspection or
maintenance is required, it is recommended that qualified professionals should perform the operation
to avoid electric shock or personal injury.
The vegetation should be cut regularly to avoid shading and thus affecting the module’s performance.
Check if the mounting hardware is tightened correctly in place.
Check whether all string fuses in each non-grounded pole are working properly.
Please cover the front surface of modules with an opaque material during repairing. Modules
exposed to sunlight can generate high voltage, which is extremely dangerous.
Trina Solar PV modules are equipped with bypass diodes in the junction box to minimize module
heating and current losses.
Before cleaning, make sure to wear PPE, such as insulated protective gloves, protective glasses,
hard hats, safety insulated shoes, etc.
When using scaffolding, make sure that the scaffolding is in a stable position or with anti-dumping
measures, and that the installer should wear a safety belt in accordance with local building codes.
Do not stand on the modules or trackers for cleaning work.
Do not try to open the junction box to change the diodes even if they fail.
If the module is damaged (broken glass or scratches on the back sheet), it needs to be replaced.
It is necessary to wear cut-resistant gloves and other personal protective equipment for special
installations.
Make sure to isolate the impacted array string to prevent the current generation before attempting to
remove the module.
Use the relevant disconnect tool provided by the supplier to disconnect the connector of the affected
module.
Check the open circuit voltage of the array string and verify that the open circuit voltage of other
strings connected in parallel are within a range of 10V difference.
Turn the circuit breaker on again after checking.
Please also pay attention to other safety precautions listed at the beginning of this manual.
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