Replacing A Safety Valve - Huawei FusionModule800 Maintenance Manual

FusionModule800 Smart Small Data Center
Maintenance Guide
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Step 2 Disconnect the power supplies from the air conditioner control unit and the outdoor unit after
the air conditioner shuts down over the EMS.
Step 3 Reclaim all the refrigerant from the system using a refrigerant retrieval device to ensure that
there is no pressure inside the system.
Step 4 Open the top cover and right rear panel.
Step 5 Cut the cable ties on the pneumatic switch cable using diagonal pliers and take out the
pneumatic switch cable from the electric control box.
Step 6 Remove the pneumatic switch using a welding torch.
high pressure and low pressure pneumatic switches.
To avoid burning the internal components, other pipes, thermal insulation foam, power cables,
and labels, take protective measures, such as spreading wet cloth, around the welding
position.
Step 7 Weld the new pneumatic switch using a welding torch and connect cables.
Step 8 Secure the pneumatic switch cable using cable ties.
Step 9 Perform a leakage test with nitrogen again.
Step 10 After checking that the air conditioner does not leak, vacuumize the air conditioner and
charge refrigerant.
Step 11 Reinstall the right rear panel and top cover.
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5.3.2.7 Replacing a Safety Valve

Prerequisites
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Issue 02 (2016-11-15)
b. Tap the cabinet that houses the air conditioner in the micro-module view.
c. Tap the air conditioner to be set in the cabinet layout diagram.
d. Choose Real-time Data > OFF.
Method 2: Log in to the ECC800 WebUI as admin. Choose Monitoring > Air
Conditioner > NetCol5000-A0104 > Controls > Ctrl Info, set On/off status on
EMS > Off, and then click Submit.
0104 in NetCol5000-A0104 is variable and subject to changes with the air conditioner connection
sequence. The displayed value prevails.
Discharge the refrigerant if the local laws and regulations allow.
A safety valve needs to be replaced.
A spare safety valve of the same model is available and functional.
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5 Parts Replacement
Figure 5-39 shows the positions of the
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