CHECK AND TEST 1
Step 1
Plug in. The compressor starts, but the protection is activated immediately,
and it cannot work normally. Put hand onto
compressor, no shaking can be felt.
Step 2
Measure the AC voltage of the compressor with
a multimeter. If voltage of three terminals
are almost the same (100V~200V), it means
power is transferred to compressor.
SAFETY ATTENTION:
MAKE SURE DETECTORS NOT TOUCH EACH OTHER. HANDS DON’T TOUCH LIVE PART.
Step 3
Wait a few minutes, repeatedly power on and
off several times, the compressor starts but
activates protection.
DIAGNOSIS 1
CHECK AND TEST 2
Step 1
Cut off capillary to discharge refrigerant.
Step 2
Cut off suction pipe and exhaust pipe.
Step 3
Power up the compressor and feel the exhaust pressure of the exhaust pipe with a paper.
DIAGNOSIS 2
PROCEDURE 1
Step 1
Unscrew terminal cover.
Step 2
Remove terminal cover.
Step 3
Move out protector and starter.
Step 4
Unscrew earthing wire.
Step 5
Unscrew nut of compressor.
Step 6
Put on a new compressor and fix nuts
onto compressor.
Step 7
Braze the joints of suction and exhasuting pipes.
Step 8
Re-braze a copper tube onto processing tube of compressor.
To get more details on brazing requirements, please go to 10.4 Annex B1
Step 9
Install quick connector onto re-brazed pipe.
PROCEDURE 2
Step 1
Clean paint off of brazed joint of drying-filter.
Step 2
Cut off drying-filter.
Step 3
Cut off capillary and remove the cut end by
shaking.
Step 4
Braze on a new drying-filter.
Step 5
Re-braze a copper tube onto processing tube of
compressor. To get more details on brazing requirements, please go to 10.4 Annex B1.
Step 6
Inject nitrogen (1.57Mpa) through quick connector into pipe for at least 3 min to blow left refrigerant away.
Step 7
Add quick connector onto processing pipe of drying-filter.
Step 8
Do leakage test on brazed joints of drying-filter and processing pipe on compressor.
Step 9
Vacuum and recharge. Click below link to get more details for vacuuming and gas- charging requirements, on 10.5 Annex B2.
Step 10
Block processing pipe twice with locking pliers.
Step 11
Left locking pliers on the second blocking and
cut off the rest pipe by shaking.
Step 12
Braze the ends and remove the pliers away.
DIAGNOSIS 3
CHECK AND TEST 3
Step 1
Clean away paint on brazed joint of drying-filter.
Step 2
Cut off drying-filter.
Step 3
Cut off capillary and remove the cut end by shaking.
Step 4
Braze on a new drying-filter.
Step 5
Add quick connector onto processing pipe of drying-filter.
Step 6
Inject nitrogen (1.57Mpa) through quick connector into pipe.
Step 7
Cut off brazed joints, one by one, at high pressure end.
Step 8
Every time a joint is cut off, check whether
the gas pressure from suction pipe is reduced
or not.
Step 1
Use a larger copper tube to connect 2 ends of
brazed joint.
Step 2
Braze the 2 ends. To get more details on
brazing requirements, please go to 10.4 Annex B1.
Step 1
Melt brazing material with flame and pull out
processing tube using a pair of pliers.
Step 2
Re-braze a copper tube onto processing tube of
compressor. To get more details on
brazing requirements, please go to 10.4 Annex B1.
Step 3
Install quick connector onto processing pipe.
Step 4
Inject nitrogen (1.57Mpa) through quick connector into pipe for at least 3 min to blow left
refrigerant away.
Step 5
Do leakage test on brazed joints of dryingfilter
and compressor processing pipe.
Step 6
Vacuum and recharge. Click below link to
get more details for vacuuming and gascharging requirements, on 10.5 Annex B2
Step 7
Block processing pipe twice with locking pliers.
Step 8
Leave locking pliers on the second block and
shake to cut off the rest of pipe.
Step 9
Braze the ends and remove the pliers.
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