7
HAZARDOUS VOLTAGES ARE PRESENT IN THE CONTROL BOX, OTHER ELECTRICAL COMPONENTS,
AND CONNECTIONS BETWEEN THESE COMPONENTS.
Before performing ANY mechanical or electrical maintenance on the equipment, de-energize (disconnect) the main
switch supplying power to the equipment; and lock and tag the main switch in the de-energized position. Refer to
ANSI Z244.1, “Personnel Protection – Lockout/Tagout of Energy Sources”.
Hoist incorporates a VFD as well as a Capacitor. Therefore, DO NOT perform ANY mechanical or
electrical maintenance within 5 minutes of powering down to allow time for the capacitor inside the
VFD to discharge. DO NOT perform any voltage or insulation resistance tests with a meg ohmmeter
when the VFD is connected to the electrical circuit.
Only trained and competent personnel should inspect and repair this equipment.
The VFD is designed in Harrington Hoists exclusive specifications. Do NOT use other than Harrington Hoist,
Inc. – authorized VFD.
• Do NOT modify the VFD.
• Do NOT change the wiring.
• Do NOT perform a withstand voltage test or measurement of insulating resistance with the VFD connected.
• Do NOT shut down the power supply during operation.
• Do NOT connect the power supply to the output side of the VFD.
Before performing parameter change or maintenance of the VFD, read this owner’s manual and observe the
information contained herein.
Parameter change and maintenance must be performed by a competent person with experience and expertise
of handling the rope hoist and VFD.
The product is energized during a parameter change or maintenance of the VFD. Do NOT remove the cover of
the VFD. Do NOT
touch the circuit board or electrical components around the VFD.
Each hoist heats up during operation. Do NOT maintain and inspect the electrical components for 30 minutes
after a stop of operation.
When handling the VFD, provide protection for Electrostatic Discharge (ESD).
Do NOT perform maintenance and inspection of peripheral parts (excluding the VFD) within 5 minutes after de-
energizing.
Failure to comply with the instructions may lead to an electric shock, burns, malfunction, breakdown or VFD
damage, and even may cause serious or even fatal injury.
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