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 is almost
the same (100V~200V), it
means power is transferred
to compressor.The power
supply of compressor is
good.
NOTE
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 exhaust pipe.
Step 3
Power up the compressor and feel the exhaust pressure of the exhaust pipe with a piece of 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 exhaust pipes.
PROCEDURE 2
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
Re-braze a copper tube
onto processing tube of
compressor.
To get more details on
brazing requirements,
please go to Annex B1
Step 6
Inject nitrogen (1.57Mpa)
through quick connector
into pipe for at least
3 min to blow remaining
refrigerant.
Step 7
Add quick connector onto processing pipe of drying-filter.
Step 8
Do leakage test on brazed joints of drying- filter and compressor processing pipe.
Step 9
Vacuum and recharge.
Click below link to get more details for
vacuuming and gas-
charging requirements,
go to Annex B2
Step 10
Block processing pipe twice with locking pliers.
Step 11
Leave locking pliers on the second block and shake to cut off the rest of pipe.
Step 12
Braze the ends and remove the pliers.
DIAGNOSIS 3
GO BACK TO COMPONENT LIST