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The modules in a PV array should be regularly checked for damage. Factors such as glass breakage,
cable breakage, and junction box damage may lead to function and safety problems. In the case of a
damaged module, replace it with the same type of module. Refer to the Product Installation Manual for
installation and disassembly of module.
Check that mounting hardware is properly tightened.
Check that all string fuses in each non/earthed pole are operating.
Replacement modules must be of same type. Do NOT touch live parts of cables and connectors. Use
appropriate safety equipment (insulated tools, insulating gloves, etc.) when handling modules.
Cover the front surface of modules by an opaque material when repairing. Modules when exposed
to sunlight generate high voltage and are dangerous.
PV modules are equipped with bypass diodes in the junction box. This minimizes module heating
and current losses. Do NOT open the junction box to change the diodes even if they malfunction.
In the event that a module is damaged (broken glass or a scratch on back sheet) and needs to be
replaced.
10.2 CONNECTOR AND CABLE INSPECTION
Inspect all cables to verify that connections are tight; the cables are protected from direct sunlight
and sited away from areas of water collection.
It is recommended to check the torque of terminal bolts and the general condition of wiring at least
once a year. Also, check that mounting hardware is properly torqued. Loose connections will result in
damage to the array.
10.3 CLEANNING
The amount of electricity generated by a solar module is proportional to the amount of light falling
on it. A module with shaded cells will produce less energy and therefore it is important to keep modules
clean.
Clean PV modules when the irradiance is below 200W/m2; liquid with a large temperature
difference from the modules shall not be used for cleaning the modules;
It is forbidden to clean PV modules under the weather conditions of wind more than 4 grades, heavy
rain or heavy snow;
When cleaning with pressurized water, the water pressure on the glass surface of the module shall
not exceed 700 KPa (14619.80psf); the module is prohibited to bear the extra force;
When cleaning PV modules, do NOT step on the modules; do NOT spay water on the backside of
the module or the cables; do NOT clean the backside of the modules; keep the connectors clean and
dry; prevent fire and electrical shock from occurring; do NOT use as steam cleaner;
