If Pre-Trip is initiated during the 30 minute time period, Pre-Trip will be allowed to run normally. Once Pre-Trip is over, the controller will revert to its normal control mode logic.

If ambient is warmer than -10.0_C, the system will run

its normal startup logic.

Arctic mode is configurable by using the configuration variable #29, refer to Table 3-1.

CONTROL TRANSFORMER

SECTION 4

= 18 Volt Energized Circuit

 

= 24

Volt Energized Circuit

 

= De-energized Circuit

 

 

 

Figure 4-5.

Defrost

 

 

 

4-13

 

T-268-07

Page 88
Image 88
Carrier 69NT40-511-199, 69NT40-521 manual = 18 Volt Energized Circuit = De-energized Circuit