2
Liebert
®
MC - UM - 10019237MAN_ENG - 31.03.2022
1.4 Automatic Restart
WARNING
Fan blades can automatically start rotating without warning at any time during a cooling cycle or after power is
restored after a power failure.
Risk of contact with high-speed, rotating fan blades.
Can cause serious personal injury or death.
Before working within the unit cabinet, removing the fan guards or servicing the fan speed control, fan blades or EC
fan motors proceed as follows:
• open all local and remote electric power supply disconnect switches
• wait 10 minutes
• verify with a voltmeter that power is OFF
WARNING
This unit operates and restarts automatically.
The fans may suddenly start blowing out a strong air ow, which may carry particles and small objects from inside
the unit.
Can cause serious personal injury.
• Wear eyes protection when you need to get close to the unit while it is operating.
• Turn the main switch to OFF to disconnect the unit from the power supply before any operation on the unit.
1.5 Personal Protective Equipment
As a general rule, always wear the following PPE (Personal Protective Equipment):
CAUTION
The microchannel condeser is made of plates and ns, which may have sharp edges and blurrs. Always wear cut
resistant gloves when operating on the condenser.
CAUTION
Components at high temperature (condenser inlet piping at about 120°C).
Always wear temperature resistant gloves when operating on the condenser.
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