F = Parameters For Controlling Evaporator Fans - Carel IR32M Manual

F = parameters for controlling evaporator fans

FAN PARAMETERS
F0 Fan control LED by fan controller (0=no, 1=yes)
F1 Fan cut-out temperature (relative to ambient temperature)
F2 STOP fans when compressor idle (0=no, 1=yes)
F3 Stop fans during defrost (0=no, 1=yes)
Fd Stop after dripping
Note: for the set times to become operative, the instrument must be switched off and on again.
F0: Fans controlled by fan controller
Fans can be put under the control of the fan controller, which manages them according to the temperature
registered by the defrost and control sensors. Alternatively, the fans can work constantly, with the possibility
of switching them off when the compressor is idle (see parameter F2), during defrosting (see parameter F3),
during a period of dripping (see parameter dd) and for a further period after dripping (see parameter F1).
Permitted values for this parameter are: F0=0 (=no). In this case fans are not controlled by the fan
controller, but by parameters F2, F3 and Fd. F0=1 (=yes). In this case the fans are managed by the fan
controller (see parameter F1). It should be remembered that if a dripping period has been provided for (dd
not=0), the fans will be cut out all the same. Default: F0=0 (not managed by fan controller). Available on IR32P,
IR32C and IRDRC.
Note: see the following chapter "Notes for the new release" to a more detailed description of this parameter
functionalities, effective for the instrument with serial number greater than 100,000)
F1: Fan cut-out temperature (operative only when F0=1)
The controller activates the fans only when the temperature of the evaporator is far enough below the
ambient temperature. Parameter F1 sets the minimum difference which there must be between the ambient
and evaporator temperatures for the fans to be activated. Once switched off, the fans will start up again
when the difference between the two sensors is equal to F1+A0, where A0 is the fan controller differential.
(See diagram.)
Default: F1=5, i.e. the fans remain operative until the evaporator temperature is 5 degrees below the
ambient temperature. Available on IR32P, IR32C and IRDRC.
Note: see the following chapter "Notes for the new release" to a more detailed description of this parameter
functionalities, effective for the instrument with serial number greater than 100,000)
F2: STOP fans when compressor idle (parameter operative only when F0=0).
It allows a choice to be made as to whether the fans should operate continuously (except F3, dd and Fd) or
only when the compressor is working. If F0=1 the fans are managed by the fan controller and therefore
working or idle according to the difference between evaporator and ambient temperatures, independently of
the state of the compressor.
F2=0 (=no): Fans operate even if compressor is idle.
F2=1 (=yes): Fans are idle when the compressor is not working.
Default: F2=1, fans are off when compressor is off.
Available on IR32P, IR32C and IRDRC.
28
Type Min Max Unit
C 0 1 flag
F 0 +20 °C/°F
C 0 1 flag
C 0 1 flag
F 0 15 min
Cod. +030220151 - Rel. 2.1 - 04/09/98
Def
0
5
1
1
1