External Warning Lamps (Option)

When the external warning lamp in red lights, crane operation to the critical side stops. Do not release load moment indicator stop function to continue crane operation. Operate the crane toward safety side at once. Restart the work after lamp lighting has changed from red to orange, or lamp has gone off.

The external warning lamps are to inform the people engaged in work around the crane of load moment indicator conditions.

WARNING RedOrange

Color Crane (or load moment indicator) conditions

Not lightedSafe

• Moment ratio: less than 90 %

OrangeNot in danger, but attention needed

• Moment ratio: between 90 % and 100 %

RedIn danger (Motion to critical side stops)

• Moment ratio: more than 100 %

• Anti-twoblock disable switch: pressed

• Override switch: ON