MULTI TYPE

Check code Check code name
Cause
[F23] / [43]
(AI-NET)
Ps sensor error Output voltage error of Ps sensor
Is connection of Ps
sensor connector
correct?
No
Connector: CN500, White
Correct connection of
connector.
Yes
Are output
voltage characteristics
of Ps sensor
normal?
Yes
No
(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.
Sensor error ➝ Replace
Is there no leakage
from SV4 valve?
Is not
refrigerant bypassed from
No
discharge to suction of
No
4-way valve?
Check compressor.
Yes Yes
Replace SV4 valve. Check 4-way valve.
Check code Check code name
Cause
[F24] / [43] Pd sensor error Output voltage error of Pd sensor
(AI-NET)
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 Check code name
Cause
[F16] / [43]
(AI-NET)
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?
No
Correct connection of connectors.
Pd sensor: CN501, Red
Ps sensor: CN500, White
Yes
Are output
voltage characteristics
of Pd sensor and Ps
sensor normal?
Yes
Are Pd/Ps
output values
Pd>Ps during
compressor
operation?
No
(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.
No
Value can be confirmed by 7-segment
display function on outdoor I/F P.C. board.
Sensor error ➝ Replace
Check compressor.
Yes
Pd SW01/02/03=1/1/2
Ps SW01/02/03=1/2/2
Check outdoor I/F P.C. board.
Defect ➝ Replace
Check code Check code name
Cause
[F22] / [B2] TD3 sensor error TD3 sensor Open/Short
(AI-NET)
This error code means detection of Open/Short of TD3 sensor. Check disconnection of circuit for connection of
connector (TD3 sensor: CN504, blue) and characteristics of sensor resistance value. (See “Outdoor unit temperature
sensor characteristics” on “8-9. Sensor Characteristics”.)
If sensor is normal, replace outdoor I/F P.C. board.
203