5
• The earth leakage current from the frequency
converter exceeds 3.5 mA. To ensure that the
earth cable has a good mechanical connection
to the earth connection (terminal 95), the cable
cross section must be at least 10 mm
2
or 2 rated
earth wires terminated separately.
• The Electronic Thermal Relay (ETR) in UL/cUL
listed VFDs provides class 20 motor overload
protection in accordance with the NEC in a
single motor applications when parameter 1-40
is set for "TRIP" and parameter 1-24 is set for
the nominal motor rated (nameplate) current.
Protection against motor overload is NOT
included in the factory setting. If this function is
desired, set parameter to 1-40 to data value
ETR trip or data value ETR warning.
ETR function is initialized at 1.16 x rated motor
current.
WARNING AGAINST UNINTENDED
START
• The motor can be brought to a stop by means of
digital commands, bus commands, references
or a local stop, while the Ingersoll Rand 302
Series VFD is connected to the AC line. These
stop functions are NOT sufficient to ensure that
no unintended start occurs and should NOT be
used for personal safety considerations.
• While parameters are being changed, the motor
may start. Consequently, the Stop/Reset button
must be enabled (Parameter 0-41) after which
data can be modified. When the drive is in local
stop the LCP will be flashing. Parameter 0-41
will be changed later during the startup
procedure.
• A motor that has been stopped may start if
faults occur in the electronics of the Ingersoll
Rand 302 Series VFD or if a temporary overload
or a fault in the AC line supply or the motor
connection clears.
WARNING: The Ingersoll Rand 302 Series VFD contains dangerous voltages when connected to line
voltage. After disconnecting from the line wait at least 15 minutes before touching any electrical components. Also make
sure that other voltage inputs have been disconnected, such as external 24 VDC, load-sharing (linkage of DC intermediate
circuit), as well as the motor connection for kinetic back-up. Only a competent electrician should carry out the electrical
installation. Improper installation of the motor or the Ingersoll Rand 302 Series VFD may cause equipment failure, serious
injury or death. Follow this manual and National
WARNING: Electrostatic Discharge (ESD) Precaution. Many electronic components are sensitive to static
electricity. Voltages are so low that they cannot be felt, seen or heard, can reduce the life, affect performance, or completely
destroy sensitive electronic components. When performing service, proper ESD equipment should be used to prevent
possible damage from occurring.
WARNING: It is the responsibility of the user or the person installing the Ingersoll Rand 302 Series VFD to
provide proper grounding, as well as motor overload and branch circuit protection according to the National Electrical Code
and local codes.
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