Huawei TP48200A-DT19C1 User Manual page 32

TP48200A-DT19C1, TP48200A-DT19C2,
TP48200A-HT19C1, TP48200A-HT19C2 Outdoor
Power System
User Manual
Figure 2-17 TCUA
(1) Power input port
(4) Switch port (reserved)
(7) Indicator
(10) Temperature signal
port 1
(13) Internal circulation fan
port 2
TEC Working Principle
The TEC cools and heats air through internal and external circulation.
how the TEC works.
Table 2-11 TEC working principles
Function
Cooling
Issue 02 (2019-02-26)
(2) External circulation fan
port 1
(5) Door status sensor port
(8) Communications port 1
(11) TEC air conditioner
port
(14) Temperature signal port
2
Figure 2-18 shows the TEC airflow directions.
Working Principle
The TCUA control box controls the refrigeration chip in the TEC
module to cool the internal circulating air. The internal circulation fan
draws the air inside the battery compartment into the internal circulation
heat sink. The internal circulation heat sink cools the air and then returns
the cooled air to the battery compartment through the air exhaust vents.
Meantime, the external circulation fan draws natural air into the external
circulation heat sink to accelerate the airflow. The air absorbs the heat
Copyright © Huawei Technologies Co., Ltd.
2 Components
(3) External circulation fan
port 2
(6) Electronic label port
(reserved)
(9) Communications port 2
(12) Internal circulation fan
port 1
Table 2-11 describes
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