CHECK AND TEST 1

Step 1

Check reworking record.

Step 2

Check to see if compressor running ratio is close to 100%.

DIAGNOSIS 1

PROCEDURE 1

NOTE

Step 1

Discharge refrigerant: use pliers to cut off charging tube.

Step 2

Discharge all refrigerant toward the exhaust vent.

Step 3

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

Step 4

Re-braze a copper tube onto processing tube of compressor. To get more details on brazing requirements

NOTE

Step 5

Install quick connector onto re-brazed pipe.

Step 6

Inject nitrogen of 1.57Mpa through quick connector into pipe.

CHECK AND TEST 2

Step 1

Please refer to drawing below to perform leakage test on brazed joints in compressor niche.

DIAGNOSIS 2



NOTE

PROCEDURE 2

Step 1

Clean paint off of brazed joint.

Step 2

Cut off brazed joint with leakage.

Step 3

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

Step 4

Weld the 2 ends. Please get more details of braze 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

Weld 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 of brazed joint of drying filter.

Step 2

Cut off the drying-filter.

Step 3

Cut off capillary and remove the cut end by shaking.

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

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

Step 8

Vacuum and recharge. Please get more details of vacuuming and gas- charging requirements, go to Annex-B2

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

Braze the ends and remove the pliers.

DIAGNOSIS 6

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