Franklin Q-link, Installation, Programming Operation, & Maintenance Manual

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(4) Operation

When the Auto restart function is selected, VFD can restart multiple times automatically during
operation.

If restart after fault reset is selected, the VFD can start automatically after fault reset.

Do not modify VFD internal components and circuits.

Set correct motor data from the motor nameplate and overload protection parameters for proper
motor overload protection.

The use of any disconnecting device (contactor, disconnect etc.) in motor circuit during VFD run can
cause a damage of VFD power components. Stop VFD before opening the motor circuit with disconnect
or contactor.

Power factor capacitors and generators may become overheated and damaged due to harmonics
distortion created by VFD.

Use, if possible, an inverter rated motor or motor with insulation class “F” or higher. The VFD generates
high frequency output pulses with spikes, which can deteriorate motor winding insulation and
eventually damage the motor. The longer distance to the motor the higher amplitude of these voltage
spikes will be applied to motor winding. Any cables with paralleled wires will increase the amplitude of
these spikes at motor terminals.

Install output reactor or filter to protect motor winding insulation based on distance range from VFD
to a motor specified in section
2.3 - Basic Configuration . Install an output reactor for shorter distance
than specified on page 3-7 if motor is old or if insulation class is lower than “F”.

VFD can operate motor at frequencies higher than 50HZ or 60Hz. Verify the maximum allowed
speed with motor and machinery manufacturers prior to increasing a VFD output frequency
because it can overheat motor or damage machinery.
(5) Safety

If required, provide an emergency mechanical brake to prevent any hazardous conditions
if VFD fails during operation.

Some VFD parameters are set as default to automatically start VFD in some applications. Disable
these parameters if automatic start is not safe for personnel or equipment.
(6) Maintenance, Inspection and Parts Replacement

Disconnect all motor leads from VFD before checking the motor insulation with a megohmmeter. The
Megger tester 1000VDC output can damage the VFD power components.

Refer to Chapter 9 for periodic inspection and parts replacement details.
(7) Disposal

Dispose of VFD properly as industrial equipment waste.