Service manual

11-8
CONTROL SYSTEM
SM HADDCI 1-A.2 GB
11.7.4 Compressor over Current Protection
11.7.5 Heat Sink Over Heating Protection
HST
HST Trend
Decreasing No Change Increasing
HST > 90 SC SC SC
85 < HST ≤ 90 D1 D2 D2
82 < HST ≤ 85 SR D1 D2
80 < HST ≤ 82 SR SR D1
78 < HST ≤ 80 Norm Norm SR
HST ≤ 78 Normal
Outdoor Coil Overheating Protection
CDT
n
is the current reading of CDT and CDT
n-1
is the last reading of CDT.
CDT
n
CDT
n
-CDT
n-1
<-1 -1 0 1 >1
CDT > CDT HSTOH5 SC SC SC SC SC
CDTOH4 ≤ CDT
n
< CDTOH5 D1 D1 D2 D2 D2
CDTOH3 ≤ CDT
n
< CDTOH4 SR SR D1 D2 D2
CDTOH2 ≤ CDT
n
< CDTOH3 SR SR SR D1 D1
CDTOH1 ≤ CDT
n
< CDTOH2 Norm Norm Norm SR SR
CDT
n
< CDTOH1 Norm
(*) Normal (Norm) – No protection status is ON.
Stop-Rise (SR) – System is in protection.
HzDown1 (D1) - System is in protection.
HzDown2 (D2) - System is in protection.
DISCHARGE SUPER HEAT PROTECTION
For S/W 370V and higher (For 467300225R Controller)
Since this model does not have EEV, the discharge superheat is conttrolled by adjusting the
compressor frequency though the down to up protection
Normal
Stop-Rise
HzDown1
HzDown2
Stop-Compresor
CCROC1
CCROC2
CCROC3
CCROC4
CCR
CONTENTS