12-10
CONTROL SYSTEM
SM GCD030 1-A.0 GB
DerCTT = current CTT – CTT of last decision time point
Control Status
DerCTT>1 or when protection
status is increased
Else
P1
Normal
Stop Rise
P2
HzDown 1
Stop Rise
P3
HzDown 2
HzDown 1
Stop Compressor
Stop Compressor
12.7.4
Compressor Over Current Protection
12.7.5
Heat Sink Overheating Protection
12.7.5.1
Heat Sink Overheating Protection For
GCD 030
HST
n
is the current reading of HST and HST
n-1
is the last reading of HST.
HST
n
HST
n
-HST
n-1
<-1
<0
≥
-1
0
>0
≤
1
> 1
HST
n
≥
88
SC
SC
SC
SC
SC
84
≤
HST
n
<
88
D1
D1
D2
D2
D2
80
≤
HST
n
<
84
SR
SR
D1
D2
D2
76
≤
HST
n
<
80
SR
SR
SR
D1
D1
72
≤
HST
n
<
76
Norm
Norm
Norm
SR
SR
HST
n
<
72
Norm
12.7.6
Outdoor Coil Overheating Protection For
GCD 030
OMT
n
is the current reading of OMT and OMT
n-1
is the last reading of OMT.
OMT
n
OMT
n
-OMT
n-1
<-1
-1
0
1
>1
OMT
n
≥
66
SC
SC
SC
SC
SC
64
≤
OMT
n
<
66
D2
D2
D2
D2
D2
62
≤
OMT
n
<
64
D1
D1
D1
D1
D1
60
≤
OMT
n
<
62
SR
SR
SR
SR
SR
58
≤
OMT
n
<
60
Norm
Norm
Norm
Norm
Norm
OMT
n
<
58
Norm
Normal
Stop-Rise
HzDown1
HzDown2
Stop-Compresor
CCROC1
CCROC2
CCROC3
CCROC4
CCR
CONTENTS