11-7
CONTROL SYSTEM
SM BS DCI 1- A.1 GB
11.19.1
Indoor Coil Defrost Protection
ICT Trend
ICT
Fast
Increasing
Increasing
No change
Decreasing
Fast
Decreasing
ICT < -2
SC
SC
SC
SC
SC
-2 ICT < 0
D1
D1
D2
D2
D2
0 ICT < 2
SR
SR
D1
D2
D2
2 ICT < 4
SR
SR
SR
D1
D2
4 ICT < 6
Norm
Norm
SR
SR
D1
6 ICT < 8
Norm
Norm
Norm
SR
SR
8 ICT
Normal
11.19.2
Indoor Coil over Heating Protection
ICT Trend
ICT
Fast
Decreasing
Decreasing
No Change
Increasing
Fast
Increasing
ICT > 55
SC
SC
SC
SC
SC
53
<
ICT
55
D1 D1 D2 D2 D2
49 < ICT 53
SR
SR
D1
D2
D2
47 < ICT 49
SR
SR
SR
D1
D2
45 < ICT 47
Norm
Norm
SR
SR
D1
43 < ICT 45
Norm
Norm
Norm
SR
SR
ICT 43
Normal
11.19.3
Compressor over Heating Protection
Compressor temperature can be in one of 5 control zones (4 in protection, and 1
normal), according to the following chart.
Normal
P1
P2
Stop-Compresor
CTTOH1
CTTOH2
CTTOH3
CTTOH4
CTT
P3
CONTENTS