TP48200A-HX09A2, TBC300A-TCA2 Outdoor Power
System
User Manual
2 Components
Issue 02 (2019-02-26)
Copyright © Huawei Technologies Co., Ltd.
25
Figure 2-18
TCUA
(1) Power input port
(2) External fan port 1
(3) External fan port 2
(4) Switch port
(5) Door status sensor port
(6) Electronic label port
(7) Indicator
(8) Communications port 1
(9) Communications port
2
(10) Temperature signal port
1
(11) TEC air conditioner port
(12) Internal fan port 1
(13) Internal fan port 2
(14) Temperature signal port
2
TEC Working Principle
The TEC cools and heats air over the internal and external air circulation.
the TEC working principles.
shows the TEC airflow directions.
Table 2-13
TEC working principles
Function
Working Principle
Refrigeration
The TCUA controls the TEC04C to cool the internal circulating air. The
internal circulating fan draws the air inside the battery compartment into
the internal heat sink. The internal heat sink cools the air and then
returns the cooled air to the battery compartment from the air exhaust
vent. At meantime, the external fan draws the external circulating air
into the external heat sink to accelerate the airflow. The air absorbs the
heat and returns to the external environment from the air exhaust vent of
the external heat sink. The air exchange between the internal and
external environment is implemented so far.
Heating
The TCUA controls the TEC04C to heat the internal circulating air. The
internal circulating fan draws the air inside the battery compartment into
the internal heat sink. The internal heat sink heats the air and then
