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
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
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