Service manual

13-9

CONTROL SYSTEM

SM DLF 1-A.1 GB

13.1.16.2 Indoor Coil Defrost Protection — DLF

ICT

Trend

Fast Increasing Increasing No Change Decreasing Fast Decreasing

< -2 SC SC SC SC SC

[-2, 0) D1 D1 D2 D2 D2

[0, 2) SR SR D1 D2 D2

[2, 4) SR SR SR D1 D2

[4, 6) Norm Norm SR SR D1

[6, 8] Norm Norm Norm SR SR

> 8 Norm

13.1.16.3 Indoor Coil Overheating Protection

ICT

ICT Trend

Fast Decreasing Decreasing No Change Increasing Fast Increasing

>62 SC SC SC SC SC

[60, 62) D1 D1 D2 D2 D2

[55, 60) SR SR D1 D2 D2

[52, 55) SR SR SR D1 D2

[48, 52) Norm Norm SR SR D1

[45, 48) Norm Norm Norm SR SR

I<45 Norm

13.1.17 Compressor Overheating Protection

13.1.17.1 Compressor Overheating Protection for DCI25/35/50/60/72Z

Compressor temperature can be in one of 5 control zones (4 in protection, and 1 normal),

according to the following chart.

Normal

Sto

-Com

resso

102

105

CTT

Control Status Compressor Temperature Increases Else

P1 Normal Stop Rise

P2 HzDown 1 Stop Rise

P3 HzDown 2 HzDown 1

Stop Compressor Stop Compressor

CONTENT