Carel ir33+ FMC - Page 30

10
rd
Temperature
St
ON
VCC Compressor
Status
OFF
AL / cct
St
St + rd
AL
AH
Compressor OFF
Cooling capacity / compressor speed modulation
Temperature
Time
Compressor status
ON
OFF
Time
cct
Compressor at minimum speed (frequency)
Compressor ON at MAXIMUM speed
ENG
ir33+ wide Fullmotion - +040000055 - rel. 1.0 - 09.06.2014
The “Low temperature alarm threshold” AL forces the Fullmotion compressor OFF.
The “High temperature alarm threshold” AH forces the Fullmotion compressor to perform a Pull Down cycle.
See the section on Temperature Pull Down.
The cut ON – cut OFF hysteresis describes the compressor status and is similar to ON/OFF compressor control,
except for the use of parameters cct, AL.
Fig. 3.b
Key
AL = Low temperature threshold
St = Set point
rd = Temperature control dierential
Fig. 3.c
Key
AH= High temperature alarm threshold
St + rd= Set point + dierential
St= Set point
AL= Low temperature alarm threshold