Operating Instructions

SED2 VFD Startup, Operation, and Maintenance Manual
56 Siemens Building Technologies, Inc.
Commissioning
WARNING:
• Only authorized personnel trained in the setup, installation,
commissioning, and operation of the SED2 may work on the
product and mechanical system.
• SED2s operate at high voltages. In some components,
operation of electrical equipment involves using dangerous
voltages.
• In cases where faults in the control equipment could cause
significant equipment damage or severe physical injury
(such as potentially dangerous short circuits), use external
precautions to ensure and to enforce safe operation (such
as independent limit switches and mechanical interlocks).
• Emergency stop facilities must remain functional in all
operating modes of the control equipment. Resetting the
emergency stop facility must not result in an uncontrolled or
undefined restart. Do not use the SED2 as an emergency
stop mechanism.
• The equipment incorporates internal motor overload
protection in accordance with UL508C, Section 42. See
Motor I
2
t Temperature Reaction parameter (P0610); I
2
t is
ON by default. (Motor overload protection can also be
provided with an external PTC temperature-thermistor
sensor disabled by default via Motor Temperature Sensor
parameter (P0601). See the Motor Overload Protection
section in this manual for details.) For reliable motor
overload protection, the motor parameters must be
configured accurately.
• Certain parameter settings can cause the SED2 to start
automatically or to restart automatically after a fault or an
input power failure (provided the fault is eliminated or
acknowledged or the supply voltage is restored).