User's Manual

2-3 Procedures of emergency
The F21 system has various protections to guard against different emergencies
including strict security code checking and automatic monitoring of parts failure. The
F21 system has isolation circuitry to protect from outside voltage surges and
interference. In the event of sensing an emergency situation the F21 will perform an
emergency stop of the equipment. It is important to properly install the F21 system so it
can perform the emergency shutdown properly.
In case of an Emergency, please follow the steps below and ask the distributor for
service immediately.
1. Press EMS button.
2. Turn the “rotary key switch” to “OFF” position and remove it.
3. Switch off the main power of crane.
4. Advise the distributor to find out the reason.
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