Huawei FusionModule1000A40 ICT Solution Maintenance Manual page 88

FusionModule1000A40 ICT Solution
Maintenance Guide
1.
(1) Hose bound to sheet metal near the outdoor unit needle valve (supportive leg or
support)
2.
3.
4.
5.
Step 12 Remove the water refill and drainage pipes from the air conditioner indoor unit, and cut off
the refrigerant pipe.
Issue 01 (2019-03-05)
Prepare a pressure gauge with two hoses, connect one hose to the outdoor unit needle
valve 10 minutes after the air conditioner has been shut down, and connect the other hose
to nearby sheet metal, such as an air conditioner supportive leg or support.
Figure 4-26 Discharging refrigerant
The hose should be bound at a position close to the hose outlet to a tension not squeezing the hose.
Slowly open the valve on the pressure gauge to start discharging refrigerant.
When discharging the refrigerant, verify that refrigerant oil does not flow out of the hose. If a small
amount of refrigerant oil continually flows out of the hose, place a vessel or rag under the hose to catch
the refrigerant oil.
Keep the pressure gauge valve open after the refrigerant draining slows down after a
period of time until no refrigerant is obviously flowing out.
Wear anti-freezing gloves and press the needle valves on the air conditioner indoor unit
to check whether refrigerant flows out.
− If refrigerant flows out, perform
valve.
− If no refrigerant flows out, go to
Check whether water exists in the water pan, humidifier cylinder, humidifier pipes, and
drainpipe. If residual water exists, clean the water using a rag and bucket to prevent
water leakage.
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Step 11.1–Step 11.3 on the corresponding needle
Step 11.5.
4 Parts Replacement
81