TP48200A-HT19C3 and TP48200A-HT19C4 Telecom
Power
User Manual
4 Maintenance
Issue 03 (2019-11-15)
Copyright © Huawei Technologies Co., Ltd.
65
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4.4.7 Replacing the External Circulation Fan of the Heat
Exchanger
Prerequisites
Prepare an ESD wrist strap, a pair of ESD gloves, an ESD box or bag, the cabinet door
key, and a maintenance tool kit.
Check that the new fan is intact.
Procedure
Step 1
Disconnect the power cable from the UIM02C.
1.
Connect the ground cable to the ESD wrist strap, and wear the ESD wrist strap and ESD
gloves.
2.
Record the position where the UIM02C panel connects to the signal cable, and then
disconnect the signal cable.
3.
Unscrew the UIM02C, as shown in Figure 4-8.
4.
Disconnect the -48 V power cable from the UIM02C backplane, as shown in Figure 4-9.
Step 2
Disconnect the transfer terminal from the external circulation fan.
Step 3
Removing the external circulation fan.
1.
Record the position where cables connect to the external circulation fan, and then
disconnect the cables.
2.
Remove the cover from the external circulation fan, as shown in Figure 4-14.