Toshiba MMY-MAP0804FT7(Z), Service Manual, Page: 204 / 333

– 204 –
Ye
s
No
Ye
s
Ye
s
Ye
s
No
[F17]
No No
[F18]
Chec
k code
Cause
Chec
k code name
Chec
k code
Cause
Chec
k code name
Indoor
T
O
A sensor error
T
O
A sensor Open/Shor
t
Indoor
TRA sensor error
TRA sensor Open/Shor
t
Is T
O
A
sensor connector
on indoor
P
.C
. board nor
mally
connected?
Are char
acter
istics
of
T
O
A sensor resistance v
alue nor
mal?
Is TRA
sensor connector
on indoor
P
.C
. board nor
mally
connected?
Are char
acter
istics of
TRA sensor resistance
v
alue nor
mal?
Correct connection of connector
.
Replace T
O
A
sensor
.
Correct connection of connector
.
Replace TRA
sensor
.
Chec
k indoor P
.C
. board.
Def
ect
→
Replace
Chec
k indoor P
.C
. board.
Def
ect
→
Replace
* See "Indoor unit temper
ature sensor char
acter
istics" on "8-
9
. Sensor Char
acter
istics".
* See "Indoor unit temper
ature sensor char
acter
istics" on "8-
9
. Sensor Char
acter
istics".
Ye
s
Ye
s
Ye
s
No No No
[F16]
[F22]
Chec
k code
Cause
Chec
k code name
Chec
k code
Cause
Chec
k code name
Outdoor pressure sensor mis
wir
ing (Pd, Ps)
1.
High-pressure Pd sensor and lo
w pressure
sensor Ps are e
xchanged.
2.
Output v
oltage of each sensor is z
ero
.
TD3 sensor error
TD3 sensor Open/Shor
t
Are connection of Pd sensor and Ps
sensor connectors
correct?
Are output
v
oltage char
acter
istics
of Pd sensor and Ps
sensor nor
mal?
Are Pd/Ps
output v
alues
Pd > Ps dur
ing
compressor
oper
ation?
Correct connection of connectors
.
Pd sensor
: CN501, Red
Ps sensor
: CN500,
White
Sensor error
→
Replace
Chec
k compressor
.r.
Chec
k outdoor I/F P
.C
. board.
Def
ect
→
Replace
(1) Pressure (Chec
k joint) b
y pressure gauge
(2) Pressure displa
y on 7-segment displa
y
(3) Output v
oltage of I/F P
.C
. board
If (1) and (2), (3) are diff
erent, an error of pressure
sensor itself is considered. If (2) and (3) are diff
erent, chec
k interf
ace P
.C
. board.
V
alue can be confir
med b
y 7-segment
displa
y function on outdoor I/F P
.C
. board.
Pd SW01/02/03=1/1/2 Ps SW01/02/03=1/2/2
This error code means detection of Open/Shor
t of
TD3 sensor
. Chec
k disconnection of circuit f
or connection of
connector (TD3 sensor
: CN504, b
lue) and char
acter
istics of sensor resistance v
alue
. (See "Outdoor unit temper
ature
sensor char
acter
istics" on "8-
9
. Sensor Char
acter
istics".)
If sensor is nor
mal, replace outdoor I/F P
.C
. board.
AMP Air Conditioning www.ampair.co.uk | sales@ampair.co.uk