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ST11950 and ST12550 Installation Guide, Rev. D 3
read and followed to minimize or eliminate the risk of
personal injury. The warnings point out conditions or
practices that may endanger you or others. The cautions
point out conditions or practices that may damage the
unit, possibly making it unsafe for use.
These warnings and cautions are not exhaustive. We
cannot possibly know, evaluate, and advise you of all the
ways in which maintenance might be performed or the
possible risk of each technique. Consequently, we have
not completed any such broad evaluation. If you use a
non-approved procedure or tool, first ensure that the
method you choose will not risk either your safety or unit
performance.
Always observe the following warnings and precautions:
• Perform all maintenance by following the procedures in
this manual.
• Follow all cautions and warnings in the procedures.
• Use sound safety practices when operating or repair-
ing the unit.
• Use caution when troubleshooting a unit that has
voltages present. Turn off power to the unit before
servicing it.
• Wear safety shoes when removing or replacing heavy
parts.