CHECK AND TEST 1

Step 1

Check reworking record.

Step 2

Check to see if compressor running ratio is 100%.

DIAGNOSIS 1

PROCEDURE 1

NOTE

Step 1

Discharge refrigerant: Cut off the charging tube with pliers.

Step 2

Discharge all refrigerant toward the exhaust vent.

Step 3

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

Step 4

Re-braze a copper tube onto compressor processing tube. Click below link to get more details for brazing requirements, go to Annex B1

NOTE

Step 5

Install quick connector onto rebrazed pipe. 

Step 6

Inject nitrogen of 1.57Mpa through quick connector into pipe.

CHECK AND TEST 2

Step 1

Test brazed joints in compressor niche for leakage with soapy water.

Step 2

Apply soapy water to brazed joints in evaporator area.

DIAGNOSIS 2

PROCEDURE 2

NOTE

Step 1

Clean paint from 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

Follow below link to find out right brazing materials, Click below link to get more details for brazing requirements, go to Annex B1

Step 5

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

DIAGNOSIS 3

CHECK AND TEST 3

Step 1

Braze a piezometer onto processing tube of compressor.

Step 2

Charge nitrogen of 1.57Mpa through quick connector into pipe.

Step 3

Do leakage test on brazing points and piezometer.

DIAGNOSIS 4



CHECK AND TEST 3

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.

Step 2

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

DIAGNOSIS 5

PROCEDURE 3

Step 1

Clean paint off 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 dryingfilter.

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

Do leakage test on brazed joints of dryingfilter and processing pipe on compressor.

Step 8

Vacuum and recharge. Click below link to get more details for vocuuming and gas-charging requirements, go to Annex B2

Step 9

Block processing pipe twice by locking pliers.

Step 10

Leave locking pliers on the second block and shake to cut off the rest of the pipe.

Step 11

Braze the ends and remove the pliers.

DIAGNOSIS 6

GO BACK TO COMPONENT LIST