CHECK AND TEST 1

NOTE

Step 1

Discharge refrigerant. Cut off the processing pipe with pliers. 

Step 2

Discharge all refrigerant toward the exhaust vent. 

Step 3

Melt brazing material with flame and pull out processing pipe using a pair of pliers. 

Step 4

Re-braze a copper tube onto compressor processing pipe.

Please find more details of brazing requirements 

NOTE

Step 5

Install quick connector onto re-brazed pipe.

Step 6

Inject nitrogen gas with 1.57Mpa pressure through quick connector into pipe.  

Step 7

Please follow drawing below to perform a leakage test for brazed joints in the compressor niche. 

DIAGNOSIS 1

PROCEDURE 1


NOTE

Step 1

Clean paint off of brazed joint.

Step 2

Cut off brazed joint with leakage 

Step 3

Use a larger copper tube to connect 2 ends of brazed joint.

Step 4

Weld the 2 ends.

CHECK AND TEST 2

Step 1

Inject nitrogen at 1.57Mpa through quick connector into pipe and use soapy water to perform leakage test again. 

DIAGNOSIS 2


CHECHK AND TEST 3

Step 1

Braze a piezometer onto processing tube of compressor. 

Step 2

Charge nitrogen at 1.57Mpa through quick connector into pipe. 

Step 3

Perform a leakage test on brazing points and piezometer 

DIAGNOSIS 3

CHECK AND TEST 4


Step 1

Give the system 1.57Mpa Nitrogen, and then observe if there is rust and/or spotted holes on pipes of compressor niche and evaporator.

NOTE

Photo is not accurate, but just to show the technique. 

Step 2

If it seems like there is a hole there, apply soapy water to the rusty area to check. 

DIAGNOSIS 4

PROCEDURE 2

Step 1

Clean paint off of brazed joint.

Step 2

Cut off brazed joint with leakage 

Step 3

Use a larger copper tube to connect 2 ends of brazed joint.

Step 4

Braze the 2 ends. 

PROCEDURE 3

Step 1

Clean paint off of brazed joint of drying filter. 

Step 2

Cut off drying-filter. 

Step 3

Cut off capillary and shake to remove the cut end. 

Step 4

Braze on a new drying-filter. 

Step 5

Inject nitrogen (1.57Mpa) through quick connector into pipe for at least
3 min to blow remaining refrigerant away. 

Step 6

Add quick connector onto processing pipe of drying-filter. 

Step 7

Perform leakage test on brazed joints of drying filter and compressor processing pipe. 

Step 8

Vacuum and recharge.

Please get more details of vacuuming and gas- charging requirements 

Step 9

Block processing pipe twice by locking pliers. 

Step 10

Leave locked pliers attached to second block and shake to cut off the remaining pipe. 

Step 11

Weld the ends and remove the pliers. 

DIAGNOSIS 5

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