Replacing A Tec - Huawei TP48200A-HT19C4-1 User Manual

TP48200A-HT19C4-1 and TBC300A-TCA2 Telecom
Power
User Manual

4.4.9 Replacing a TEC

Prerequisites
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
Context
You only need to disconnect the power supply to the TCUA control box, but do not need to
disconnect the AC input to the power system.
Procedure
Step 1 Connect the ground cable for the ESD wrist strap, and put on the ESD wrist strap and ESD
gloves.
Step 2 Remove the TEC control box.
1.
2.
3.
Step 3 Remove the TEC.
1.
2.
3.
Issue 03 (2019-11-15)
Prepare an ESD wrist strap, a pair of ESD gloves, an ESD box or bag, and the cabinet
door key.
Check that the new TEC is intact.
Switch off the circuit breaker for the TCUA control box on the DC PDU.
Record positions where cables connect to the TCUA control box and disconnect the
cables.
Unscrew and remove the TCUA control box, as shown in Figure 4-17.
Record the position where the TEC cable connect to the TCUA control board, and
disconnect the cable.
Unscrew and remove the external cover from the cabinet door, as shown in Figure 4-19.
Unscrew and remove the TEC, as shown in Figure 4-20.
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