SMA SC 500CP-US Maintenance Manual - Manual (Page 48)

9 Maintenance when Control Voltage is Present SMA America, LLC
48 SCCP-US-WH-US_en-30 Maintenance Manual
9.3 Checking the Heating Element, Hygrostat and Fan
Figure 13: Positions of the heating element, hygrostat and fans (left image standard unit, right image with Integrated DC Switch)
Requirement:
☐ There are no disturbances.
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Danger to life due to electric shock when opening the inverter cabinet
There are live components behind the doors of the inverter cabinet.
• Wear Hazard Risk Category 2 personal protective equipment.
• Always perform work in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA),
NEC, and NFPA 70E.
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Risk of burns due to hot parts of the heating element
During the functional test, the heating element becomes hot. There is a risk of burns if you touch the heating element
without protective gloves.
• Do not touch heating elements with bare hands.
• Wear personal protective equipment.
• Always maintain a suitable distance when checking the function of the heating elements.
Low humidity
If humidity is below 50%, you will not be able to perform the function test since the minimum value of the hygrostat
is 50%.
Position Designation
A Heater
B Fans
C Hygrostat