SMA SUNNY CENTRAL - Manual (Page 61)

SMA Solar Technology AG Maintenance
User Manual SC-BEN092751 61
Time Intervals for Maintenance Work
Maintenance work Maintenance interval
(recommended)
Read out long-term data and error memory. 1 month *
(depending on system
size)
Clean or replace the filter material in the air inlet filters. 6 months *
Clean the insect guards at the air inlets and outlets. 6 months *
Clean the heatsink power module 12 months *
Check the inside of the cabinet and the EVR resistor for heavy dust deposits,
dirt, moisture, and water penetration from outside.
If necessary, clean the Sunny Central and employ suitable corrective
measures. 12 months
Check all power cable connections for looseness and tighten them if
necessary. Check the connectors and insulation for discoloration or
degradation. Replace any damaged connectors or corroded contacts. 12 months
Check adhesive warning labels and replace if necessary. 12 months
Cooling fans functionality test.
Check all cooling fans for functionality and operating noise. The fans can
be switched on by adjusting the thermostats, or during operation.
If present: cabinet fan, heatsink fan(s), internal circulation fan(s), diode fan,
heating fan 12 months
Heating functionality test. 12 months
Functionality test of all protective equipment present:
• leakage current circuit breakers
• line circuit breakers
• power switches
• motor overload switches
by means of manual activation or by pressing the test button (if applicable).
12 months
Visually check all fuses and disconnectors, and lubricate the contacts if
necessary. 12 months
Check overvoltage protectors. 12 months *
Check the 230 V und 24 V control and auxiliary voltages. 12 months
Overtemperature functionality test.
Check the overtemperature safety circuit. 12 months