CONTROL SYSTEM
12-2
SM PNXADCI 1-A.1 GB
LoadDeadZone
LoadDeadZoneC
LoadDeadZoneH
During running time (unlike starting) Compressor can operate only in its allowed frequency
range.
The lower allowed frequency is extracted from the following:
Mode
MinFreq
MinFreqA
HP
HPA
Cool
MinFreqC MinFreqCA HPAtMinFreqC HPAtMinFreqCA
Heat
MinFreqH MinFreqHA HPAtMinFreqH HPAtMinFreqHA
Notes:
1. HP stands for High Pressure.
2. Pressure is represented by the following:
•
Cooling:
max {OMT, OCT} in cooling mode,
•
Heating (Multi split):
maximum ICT among all active and available inactive IDUs in
heating mode.
•
Heating (Single Split):
ICT
3.
The above parameters are determined from the compressor specifications.
The higher allowed frequency is extracted from the following:
Mode
‘Unit Night Mode’
Maximum Frequency (MaxFreq)
On
MaxFreqC
*0.75
Cool
Off
MaxFreqC
On
MaxFreqH
*0.75
Heat
Off
MaxFreqH
12.1.3.3 Frequency Changes Control
Frequency change rate is 1 Hz/sec.
12.1.3.4 Compressor Starting Control
Frequency
Time
Min 10 Minutes
1
Minute
Step 1
Step 3
1
Minute
Step 2
