Huawei TP48200A-HT15D3 User Manual page 35

TP48200A-HT15D3 Outdoor Power System (Russia,
Megafon)
User Manual
Figure 3-15 TCUA
(1) Power input port
(4) Boolean value port
(reserved)
(7) Indicator
(10) Temperature sensor
port 1
(13) Internal circulation fan
port 2
TEC Working Principle
The TEC cools and heats air over internal and external air circulation.
TEC working principle.
Table 3-13 TEC working principle
Function
Cooling
Issue 02 (2019-02-26)
(2) External circulation fan
port 1
(5) Door status sensor port
(8) Communications port 1
(11) TEC port
(14) Temperature sensor
port 2
Figure 3-16 shows TEC airflow directions.
Working Principle
The TCUA controls the TEC04C to cool the internal circulation air. The
internal fan draws the hot 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
the same time, the external circulation fan draws the external circulation
Copyright © Huawei Technologies Co., Ltd.
3 Components
(3) External circulation fan
port 2
(6) E-label port (reserved)
(9) Communications port 2
(12) Internal circulation fan
port 1
Table 3-13 shows the
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