Toshiba MMY-MAP0804FT7(Z), Service Manual, Page: 219 / 333

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No No No No No
No No
No
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
[P13]
Chec
k code
Cause
Chec
k code name
Outdoor liquid bac
k detection
error
1.
PMV1/PMV2 error
2.
Pd sensor
, Ps sensor error
3.
Clogging of SV2 circuit
4.
Clogging of SV3B circuit and/or balance pipe
5.
Leakage at a chec
k v
alv
e on a main discharge pipe
6.
Outdoor I/F P
.C
. board error
Are
connections of
outdoor PMV1/PMV2/PMV4
connectors
correct?
Are
oper
ations of outdoor
PMV1/PMV2/PMV4
nor
mal?
Are
char
acter
istics of
Pd sensor/Ps sensor
output v
oltage
nor
mal?
Is
SV2 v
alv
e coil
correctly
connected?
Are
balance pipe
ser
vice v
alv
es of
all units fully
opened?
Is there no
clogging of SV3B
va
lve
?
Is there no
clogging of SV3B v
alv
e
of an
y other unit than
malfunctioning
one?
Correct connector connection. (PMV1:
CN300, PMV2:
CN301, PMV4:
CN303)
PMV error Pd sensor/Ps sensor error Correct connector connection. (SV2:
CN311)
Open fully balance pipe ser
vice v
alv
es of all units
.
Replace clogging par
ts
.
Replace clogging par
ts
.
Replace chec
k v
alv
e of main
discharge pipe
.
Chec
k I/F P
.C
. board.
Is there no leakage of
chec
k v
alv
e of main
discharge pipe in f
ollo
w
er
units in which compressors
are dr
iv
en in cooling
oper
ation?
No
No
No
Ye
s
Ye
s
Ye
s
Ye
s
No No
[P15]
Chec
k code
Cause
Chec
k code name
Gas leak detection TS condition (Sub-code:
01)
1.
Outdoor unit ser
vice v
alv
e closed
2.
Outdoor PMV error
3.
TS1 sensor error
4.
Refr
iger
ant shor
tage
, clogging refr
iger
ant circuit
5.
4-w
a
y v
alv
e error
6.
SV4 circuit error
Are ser
vice
valv
es of discharge
gas pipe
, suction gas pipe
and liquid sides
fully opened?
Open ser
vice v
alv
es fully
.
Repair outdoor PMV
.
Replace TS1
sensor
.
Chec
k and replace 4-w
a
y
v
alv
e and coil.
Repair SV41/SV42/SV43 v
alv
e circuits
.
Refr
iger
ant shor
tage
,
clogging, pipe breakage
.
(Chec
k there is no clogging and pipe
breakage
, and then recharge refr
iger
ant.)
(Coil, v
alv
e body
, disconnection
of wire
, etc
Are
char
acter
istics
of TS1
sensor
resistance
nor
mal?
Does discharge
refr
iger
ant gas b
ypass
to suction side through
4-w
a
y v
alv
e?
Is there an
y
leakage on SV41,
42 and 43 v
alv
e
circuits?
Connectors:
PMV1:
CN300,
PMV2:
CN301, PMV4:
CN303
Is outdoor PMV nor
mal?
1.
Connector connection
2.
Wir
ing
3.
Coil
4.
V
alv
e
body
5.
Outdoor I/F P
.C
. board
* See "Outdoor unit temper
ature sensor
char
acter
istics" on "8-
9
. Sensor Char
acter
istics".
NORMAL NORMAL NORMAL
ABNORMAL ABNORMAL
ABNORMAL
Replace def
ectiv
e par
ts
.
Chec
k
SV5, SV11 circuit
leakage
.
Correct piping to nor
mal
piping.
Chec
k
incorrect piping of
discharge gas/suction
gas main
pipes
.
Repair FS unit.
Is
FS unit nor
mal?
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