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Check items and procedures to follow when checking oil circuit with compressor(s) disconnected
Check item
Location
Procedure
Leakage of outdoor PMV
Leakage of check valve in
discharge pipe convergent
section
A,C
1) With PMV1 and 2 fully closed, apply pressure to the check joint of liquid pipe with nitrogen, and check the
pressure at the check joint of discharge pipe.
If the pressure at the check joint of discharge pipe increases, there is a leak from PMV1 or 2 (A) and check valve
of discharge pipe (C). Replace the faulty parts.
2) If the pressure does not increase, fully open outdoor PMV 1 and 2 and check the pressure at the check joint of
discharge pipe again.
If the pressure increases, there is a leak from the check valve of discharge pipe (C). Replace the part.
Leakage of check valve in
discharge pipe
E
3) With pressure applied to the check joint of discharge pipe with nitrogen, if gas escapes from the discharge pipe
section of the disconnected compressor, there is a leak from the check valve of discharge pipe (E). Replace the
part.
Leakage of check valve in oil
equalization circuit
F
4) With pressure applied to the check joint of discharge pipe with nitrogen, if gas escapes from the oil equalization
pipe section of the disconnected compressor, there is a leak from the oil equalization pipe check valve (F).
Replace the part.
Leakage of SV3A valve
G
5) With pressure applied to the check joint of discharge pipe with nitrogen, manually open the SV3B valve. If gas
escapes from the suction pipe section of the disconnected compressor, there is a leak from the SV3A valve.
Replace the part.
Leakage of SV3B valve
H
6) Then manually open the SV3A valve. If gas escapes from the suction pipe section of the disconnected
compressor, there is a leak from the SV3B valve. Replace the part.
Clogging of SV3E valve
Clogging of oil-return distributor
I
7) With pressure applied to the check joint of discharge pipe with nitrogen, manually open the SV3E valve. If gas
does not escape from the suction pipe section of the disconnected compressor, the SV3E valve or oil-return
distributor is clogged. Replace the part.
Clogging of SV3D valve
Clogging of oil-return capillary
Clogging of oil-return distributor
J
8) With pressure applied to the check joint of discharge pipe with nitrogen, manually open the SV3D valve. If gas
does not escape from the suction pipe section of the disconnected compressor, the SV3D valve, oil-return
capillary or oil-return distributor is clogged. Replace the part.
Fan
Fan motor
Right-side
Main heat exchanger
Main Heat exchanger
Left-side
4-way valve
High-pressure sensor
Low-pressure sensor
Oil separator
Oil pipe
Check valve
Check valve
Liquid tank
Accumulator
Liquid-side
service valve
Gas-side
service valve
Balance pipe
packed valve
High-pressure
SW
Discharge pipe check point
Oil-return
capillary
Liquid pipe check
point
Reducer
Fusible
plug
High-pressure
SW
Check valve
Check valve
Oil-return
distributor
Check valve
Check valve
Содержание MMY-MAP0724HT6UL
Страница 229: ...228 15Exploded Diagram Parts Price List SMMS i OUTDOOR UNIT MMY MAP0724HT6UL ...
Страница 230: ...229 MMY MAP0724HT6UL ...
Страница 232: ...231 SMMS i OUTDOOR UNIT MMY MAP0964HT6UL MMY MAP1144HT6UL ...
Страница 233: ...232 MMY MAP0964HT6UL MMY MAP1144HT6UL ...
Страница 237: ...236 SMMS i INV SERVICE PARTS LIST MMY MAP0724HT6UL 4 pieces PC board ...
Страница 238: ...237 SMMS i INV SERVICE PARTS LIST MMY MAP0964HT6UL MMY MAP1144HT6UL 4 pieces PC board ...
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