Wolf CRL-A-1300, Инструкция по установке и обслуживанию

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17. Maintenance shutdown
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Shutdown Before starting any maintenance work, switch OFF the isolator and safeguard
against unauthorised reconnection. If the isolator is switched back on
unintentionally, maintenance staff or others in the vicinity could be at risk from
rotating parts.
Wait for the fans to come to a complete standstill before opening the doors
(approx. 2 minutes). When the doors are opened, negative pressure may draw
in loose objects, which could destroy the fan or even cause a risk to life.
Open inspection doors
using a quadrant key
Isolator
Even when the unit has been shut down, voltage will still be present at terminals
and connections of the EC fans. This means there is a risk of electric shock
that could result in injury or death.
- Do not touch the EC fans for five minutes after disconnecting the power
across all poles.
- Use a rubber mat if working on the unit when it is electrically charged.