Ye
s
Outdoor I/F P
.C. board
TE1 sensor : CN381, White
TL1
sensor : CN378, White
No
No
Ye
s
No
Ye
s
[F15]
[F13]
Sub-code: 1
∗
: Compressor 1, 2
∗
: Compressor
2
Check code
Check code name
Cause
Check code
Check code name
Cause
Outdoor temp sensor miswiring
(TE1, TL1)
TH sensor trouble
IPM
built-in sensor trouble in
compressor P.C. board
This check code means IPM built-in temperature sensor trouble.
Replace compressor P.C. board.
1.
Misinstallation and misconnection of
TE1 sensor
and TL
1
sensor
2.
Resistance characteristics trouble of
TE1 sensor
and TL1
sensor
3. Outdoor
P
.C.
board
(I/F)
trouble
Are installed positions
of
TE1 sensor and
TL
1
sensor correct?
Are connection
of
TE1 sensor connector
and
TL1
sensor connector
normal?
Are resistance
characteristics of
TL
1
sensor and
TE1 sensor
normal?
Correct installed positions of
TE1 sensor and
TL
1 sensor.
Correct connection of
connectors.
Correct connection of
connectors.
Replace outdoor I/F P
.C. board.
TE1 sensor: Outdoor heat exchanger temp sensor
TL1
sensor:
Sensor between PMV1 and subcool heat exchanger
* See “Outdoor unit temperature sensor characteristics” on
“8-10
. Se
nsor Characteristics”.
Ye
s
No
No
Ye
s
No
Ye
s
[F16]
Outdoor pressure sensor
miswiring (Pd, Ps)
1.
High-pressure Pd sensor and low pressure sensor
Ps are exchanged.
2.
Output voltage of each sensor is zero.
Are connection of
Pd sensor and Ps
sensor connectors
correct?
Are output
voltage characteristics
of Pd sensor and Ps
sensor normal?
Are Pd/Ps
output values
Pd>Ps during
compressor
operation?
Correct connection of connectors.
Pd sensor: CN501, Red
Ps sensor: CN500, White
Sensor trouble
Replace
Check compressor.
correctly wire
Replace outdoor I/F P
.C. board.
No
Ye
s
Is
connection of
compressor wire
correct?
Replace the compressor
(1) Pressure (Check joint) by pressure gauge
(2) Pressure display on 7-segment display
(3) Output voltage of I/F P
.C. board
If (1) and (2), (3) are dif
ferent, a trouble of pressure
sensor itself is considered.
If (2) and (3) are dif
ferent, check interface P
.C. board.
V
alue can be confirmed by 7-segment
display function on outdoor I/F P
.C. board.
Pd SW01/02/03=1/1/2
Ps SW01/02/03=1/2/2
Chec
k code
Chec
k code name
Cause
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Summary of Contents for MMY-MUP0801HT7JP
Page 309: ......
