Carel uC2SE, User Manual

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F04
F05
F06 F09
F04
F08
F04
F03
F05
F07 F06
F04
F03
F08
F09 F10
0%
100%
0%
100 %
0%
0%
100%
1 1
1 1
3
2 2
2 2
3
ENGLISH
μC 2 SE - +030220426 - rel. 2.1 - 09.06.2010
- Max outside temperature threshold for sliding defrost
d18:
This establishes the maximum value of the outside temperature below which sliding defrost
is activated.
- Maximum temperature/pressure diff erential deviation for defrost
d19:
This value is expressed in °C if the compensation is controlled by temperature, or in bar if
controlled by pressure. The value set is subtracted from d03.
- Outside temperature diff erential for compensation saturation
d20:
The value set is subtracted for d18.
• Fan settings: parameters (F*)
- Fan output
F01:
Enables the operation of the fans.
F01=0: fans absent;
F01=1: fans present.
The PWM output (1 or 2, depending on the value of parameter H02) requires the presence of the
optional fan control cards (ON/OFF for the CONVONOFF module or speed variation for MCHRTF or
FCS three-phase).
- Fan operating mode
F02:
This establishes the operating logic for the fans:
F02=0: always ON at maximum speed, independently from the compressors. The fans are only
switched OFF when the unit is in standby.
F02=1: ON at maximum speed when at least one compressor in the corresponding circuit is ON
(parallel operation in each circuit).
F02=2: ON when the corresponding compressor is ON, with ON/OFF control based on the
temperature/pressure settings for the minimum and maximum speed (parameters F05-F06-F08
and F09). When the compressors are stopped, the corresponding fans are also stopped,
irrespective of the condensing temperature/pressure.
Fig. 5.a.l
Fig. 5.a.m
Key:
1. speed %;
2. condensing temperature/pressure;
3. hysteresis.
F02=3: ON when the corresponding compressor is ON, with speed control. When the
compressors are stopped the corresponding fans are also stopped, irrespective of the condensing
temperature/pressure.
With F02=3 and an NTC condenser probe, when the compressor starts the fans are started at
maximum speed for the time F11, irrespective of the temperature measured.
In the event of a condenser probe fault, the fans will be switched OFF.
- Minimum voltage threshold for Triac
F03:
In the event of fan speed control, the optional phase cutting cards (MCHRTF*) are required,
fi tted with a triac. The voltage delivered by the triac to the electric fan motor corresponding to
the minimum speed must be set. The set value does not correspond to the actual voltage in Volts
applied, but rather to an internal unit of calculation in the μC
2 SE.
If using FCS controllers, set this parameter to 0.
F03 = Represents the minimum threshold for the triac
Cooling ON/OFF Heating ON/OFF
Cooling with speed control Heating with speed control