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4.3. Residual energy
Even if all the hazard warnings in the chapter above are taken into account, the following residual
energy situations can result in a hazard:
▪ Rotational energy of the decelerating fan
o Despite the installed protective grille, hair or pieces of clothing can still be drawn
in and caught.
▪ Hot surfaces on machine parts
o Especially the compressor head and the hot gas pipe and the condenser can still
be very hot for some time after the machine has been switched off. Temperatures
within the range from 60°C to 90°C are possible.
▪ Dangerous electrical voltage in the control cabinet despite the switched off main switch
o If the machine is only switched off at its main switch, dangerous electrical voltage
is nonetheless still present at several terminals in the control cabinet. In
particular, these are the main supply terminal and the input terminals of the main
switch.
▪ Refrigeration circuit is pressurised
o Provided it is not damaged the refrigeration circuit is closed. Therefore, a hazard
is not to be assumed.
Note:
After switching off the unit at the main switch, if you wait for 5 minutes before opening the unit
risks due to rotational energy and electrical power can be reduced. In this case only the residual
thermal energy must be considered.
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