11-13
CONTROL SYSTEM
Revision Y05-02Service Manual - Delta DCI
11.13 SW Parameters
11.13.1 Indoor Units SW Parameters
General Parameters for All Models:
Parameters defining the indoor fan speed as a function of Indoor Coil temperature in heat mode
(ICT):
ICTST Speed ICT to stop indoor fan 25
ICTVLSpeed ICT to go down to very low speed 28
ICTLSpeed ICT to start in very low speed 30
ICTHSpeed ICT to start in increase speed from very low 32
ICTTSpeed ICT to enable Turbo fan speed 40
Parameters for defrost protection:
ICTDef1 ICT to go back to normal 8
ICTDef2 ICT to ‘stop rise’ when ICT decrease 6
ICTDef3 ICT to ‘stop rise’ when ICT is stable 4
ICTDef4 ICT to ‘Hz Down’ when ICT decrease 2
ICTDef5 ICT to ‘Hz Down’ when ICT is stable 0
ICTDef6 ICT to stop compressor -2
Parameters for indoor coil over heating protection:
ICTOH1 ICT to go back to normal 45
ICTOH2 ICT to ‘stop rise’ when ICT increase 48
ICTOH3 ICT to ‘stop rise’ when ICT is stable 52
ICTOH4 ICT to ‘Hz Down’ when ICT increase 55
ICTOH5 ICT to ‘Hz Down’ when ICT is stable 60
ICTOH6 ICT to stop compressor 62
11.13.2 Model Depended Parameters:
Parameter name
Models
22 25 35 50
NLOAD limits as a function of selected indoor fan speed
MaxNLOADIF1C 40 40 40 39
MaxNLOADIF2C 55 51 55 60
MaxNLOADIF3C 120 90 90 90
MaxNLOADIF4C 127 127 127 90
MaxNLOADIF5C 127 127 127 90
Indoor Fan speeds
IFVLOWC 700 700 700 700
IFLOWC 800 850 850 900
IFMEDC 950 1050 1000 1100
IFHIGHC 1050 1200 1200 1230
IFTURBOC 1150 1250 1250 1280
IFVLOWH 700 700 700 700
IFLOWH 850 950 950 900
IFMEDH 1000 1050 1100 1100
IFHIGHH 1100 1250 1250 1250
IFTURBOH 1200 1350 1300 1350
Nominal Compressor Frequency
NomLoadC 40 51 61 67
NomLoadH 55 58 62 69
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