CHECK AND TEST 1

Step 1

Plug in - the compressor starts, but protection is activated immediately, and it cannot run normally.


Step 2

Put hand onto
compressor - no shaking
can be felt.

Step 3

Measure the AC voltage
of the compressor with a
multimeter.

Step 4

Wait a few minutes,
power on and off several
times consecutively - the
compressor starts but
activates protection.
Wait a few minutes,
power on and off several
times consecutively - the
compressor starts but
still activates protection.

DIAGNOSIS 1

SAFETY WARNING:
MAKE SURE
DETECTORS DO NOT
TOUCH EACH OTHER.
DO NOT TOUCH LIVE
PARTS WITH HANDS.


CHECK AND TEST 2


Step 1

Cut off capillary to
discharge refrigerant.

Step 2

Cut off exhaust pipe and
suction pipe.

Step 3

Power on the
compressor and test
exhaust pressure coming
from exhaust pipe with a
piece of paper.

DIAGNOSIS 2


CHECK AND TEST 3

Step 1
Braze on a new dryingfilter.


Step 2

Add quick connector
onto processing pipe of
drying-filter.

Step 3

Inject nitrogen (1.57Mpa)
through quick connector
into pipe.

Step 4

Follow the order on
drawing below to cut off
brazed joint, one by one,
at high pressure end.

Note


Step 5

Every time you cut off
one joint, check whether
the gas pressure
from suction pipe has
dropped or not.

DIAGNOSIS 3


PROCEDURE 1

Note
Step 1

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


 
Step 2

Braze the 2 ends.
Please find more
details of brazing
requirements on Annex A3

Note

Step 3

Re-braze a copper tube
onto processing tube of
compressor.
Please find more details
of brazing requirements,
on Annex A3

Step 4

Install quick connector
onto re-brazed pipe.

PROCEDURE 2

Step 1
Braze exhaust pipe
and suction pipe onto
compressor.



Step 2

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

Step 3

Test for leaks on brazed
joints of drying-filter
and processing pipe on
compressor.

Step 4

Vacuum and recharge.
Please get more details
of vacuuming and gascharging
requirements
on Annex B1

Step 5

Block processing pipe
twice by locking pliers.

Step 6

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

Step 7

Braze the ends and
remove the pliers away.

CHECK AND TEST 4


DIAGNOSIS 5


PROCEDURE 3

Step 1

Open the metal clasp.

Step 2

Remove terminal cover.

Step 3

Disconnect all terminals.

Step 4

Unscrew earthing wire.

Step 5

Unscrew nut of
compressor.

Step 6

Install a new compressor
on top.

Step 7

Braze the joints of
suction and exhaust
pipes.

PROCEDURE 4


Step 1

Re-braze a copper tube
onto processing tube of
compressor.
To get more details on
brazing requirements,
please go Annex A3

Note

Step 2

Install quick connector
onto re-brazed pipe.

Step 3

Clean away paint
on brazed joint of
drying-filter.

Step 4

Cut off the brazed joint of
drying filter.

Step 5

Cut off capillary and
remove the cut end by
shaking.

Step 6

Braze on a new
drying-filter.

Step 7

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

Step 8

Add quick connector
onto processing pipe of
drying-filter.

Step 9

Test for leaks on brazed
joints of drying-filter
and processing pipe on
compressor.

Step 10

Vacuum and recharge.
Please get more details
of vacuuming and gascharging
requirements
on Annex B1

Note

Block processing pipe
twice by locking pliers.

Step 11

Block processing pipe
twice by locking pliers.

Step 12

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

Step 13

Braze the ends and
remove the pliers.

CHECK AND TEST 5


DIAGNOSIS 6


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