Toshiba MMY-MAP0806HT7(J)P, Service Manual

Page: 266 / 350

<MMY-MAP14A6 ∗ , MAP16A6 ∗ , MAP1806 ∗ , MAP2006 ∗ , and MAP2206>
Check items and procedures to follow when checking oil circuit with compressor(s) disconnected
e r u d e c o r P n o i t a c o L m e t i k c e h C
Leakage of outdoor PMV
Leakage of check valve in
discharge pipe convergent
section
A,
B
1) With PMV1 and 3 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
(A)
or
3 (B)
and check valve of discharge pipe (C). Replace the faulty parts.
2) If the pressure does not increase, fully open outdoor PMV1 and
3
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 SV3D valve
Clogging of oil-return capillary
Clogging of oil-return distributor
J
7 ) 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.
仮
(TD2)
(TS1)
(TE1)
(TK2)
(TK1)
(TD1)
(TK4)
(TE2)
(TO)
SV
SV
SV
SV
M M
(TG2)
(TG1)
(TL3)
SV
SV
SV
(TK5)
(TS3)
(TL1)
(TL2)
(SV3B)
(SV3A)
(SV2)
(SV3D)
(SV42)
(SV41)
(SV3C)
(PMV4)
Fan Fan
Fan motor
Fan motor
Right side
Main heat exchanger
Left side
Main heat exchanger
Right side Sub heat exchanger
Left side Sub heat exchanger
(PMV1)
(PMV3)
4-way valve
High-pressure
sensor
Low-pressure
sensor
Oil separator
Accumulator
Liquid Tank
Oil Header
High-
pressure
switch
High-
pressure
switch
Sub cool
heat exchanger
Fusible
plug
FP
Liquid side
Service valve
Gas side
Service valve
Balance pipe
Service valve
Reducer
Compressor
1
(Inverter)
Compressor
2
(Inverter)
J
I
G
H
E
C
F
A
B
− 2 6 5 −