Fire Mode - WEG CFW501 V1.8X Programming Manual

18.9 FIRE MODE

The "Fire Mode" function is intended to make the frequency inverter continue to drive the motor even under adverse
conditions, inhibiting most faults generated by the frequency inverter. The "Fire Mode" is selected by driving a
digital input previously set to "Fire Mode" with logic level "0" (0 V) at the input terminals. When the drive enters
the "Fire Mode", the alarm "A0211" will be generated on the HMI (keypad) and the status of the operation mode
will be updated in parameter P0006.
DANGER!
Notice that the CFW501 is just one of the components of the HVAC system, and it is configurable
„
for different functions, including the "Fire Mode" function.
Thus, the full operation of the "Fire Mode" function depends on the accuracy of the project and
„
on the joint performance of the components of the system.
Ventilation systems that work on life safety applications must be approved by the Fire Department
„
and/or another competent public authority.
The non-interruption of the operation of the CFW501, when configured for operation in the "Fire
„
Mode" function, is critical and must be taken into account in the preparation of safety plans in the
environments in which they are installed, since damages may occur to the CFW501 itself and to
other components of the HVAC system, to the environment in which it is installed and to people
with risk of death.
The operation in the "Fire Mode" function may, under certain circumstances, result in fire, since
„
the protection devices will be disabled.
Only personnel from engineering and safety must consider the configuration of the equipment for
„
the "Fire Mode" function.
WEG strongly recommends to follow the cares and procedures above before using the CFW501
„
in the "Fire Mode" function, and it will not be liable to the final user or third parties for any losses
or damages direct or indirectly incurred due to the programming and operation of the CFW501 in
"Fire Mode" regime, considering the critical and special use of this function.
NOTE!
When the user activates the "Fire Mode" function, he/she acknowledges that the protection functions
of the CFW501 are disabled, which may result in damages to the CFW501 itself, to the components
connected to it, to the environment in which it is installed and to people present in such environment;
therefore, the user takes full responsibility for the risks arising from such operating condition. Operation
with the "Fire Mode" function programmed voids the warranty of the product. The operation in this
condition is internally registered by the CFW501 and must be validated by a duly qualified professional
of engineering and occupational safety.
If the user presses the ESC key, this message will move from the main display to the secondary
display the operation mode shown in parameter P0006 will continue unchanged. It is also possible
monitor this condition by a digital output set to "Fire Mode". During operation in "Fire Mode" all STOP
commands are ignored (even General Enable). A couple of Faults (considered critical) that can damage
the drive will not be disabled, but can be endlessly auto-reset (set this condition in P0582 parameter):
DC Bus Overvoltage (F0022) and Overcurrent/Short-circuit (F0070).
HVAC Functions
CFW501 | 18-29
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