Yes
Yes
Yes
No
No
No
[F16]
Check code
Cause
Check code name
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 error → Replace
Check compressor.
Check outdoor I/F P.C. board.
Defect → Replace
(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 different, an error of pressure
sensor itself is considered.
If (2) and (3) are different, check interface P.C. board.
Value 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
No
No
No
Yes
Yes
Yes
Yes
No
[F23]
Connector: CN500, White
[F24]
Ps sensor error
Output voltage error of Ps sensor
Pd sensor error
Output voltage error of Pd sensor
Is
connection of Ps
sensor connector
correct?
Are
output
voltage characteristics
of Ps sensor
normal?
Is
there no leakage
from SV4 valve?
Is not
refrigerant bypassed from
discharge to suction of
4-way valve?
Correct connection of
connector.
Sensor error → Replace
Check compressor.
Replace SV4 valve.
Check 4-way valve.
(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 different, an error of pressure
sensor itself is considered.
If (2) and (3) are different, check interface P.C. board.
It is output voltage error of Pd sensor. Check disconnection of connection of connector (Pd sensor: CN501, red)
circuit and output voltage of sensor.
If the sensor is normal, replace outdoor I/F P.C. board.
Check code
Cause
Check code name
Check code
Cause
Check code name
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