–
78
–
Check code
Main remote
controller
F07
F08
F10
F11
F12
F13
F15
F16
F23
F24
F29
F31
Outdoor 7-segment display
Check code
F07
F08
—
—
F12
F13
F15
F16
F23
F24
—
F31
Sub-code
—
—
—
—
—
01: Compressor 1 side
02: Compressor 2 side
—
—
—
—
—
—
Detected
position
I/F
I/F
Indoor
Indoor
I/F
IPDU
I/F
I/F
I/F
I/F
Indoor
I/F
Check code name
TL sensor error
TO sensor error
Indoor TA sensor error
Indoor TF sensor error
TS1 sensor error
TH sensor error
Outdoor temp sensor
miscabling (TE1, TL)
Outdoor pressure sensor
miscabling (Pd, Ps)
Ps sensor error
Pd sensor error
Indoor other error
Outdoor EEPROM error
Status
All stop
All stop
Corresponding
unit only stops.
Corresponding
unit only stops.
All stop
All stop
All stop
All stop
All stop
All stop
Corresponding
unit only stops.
All stop (*1)
Error detection condition
• Resistance value of sensor is infinite or zero
(Open/Short).
• Resistance value of sensor is infinite or zero
(Open/Short).
• Resistance value of sensor is infinite or zero
(Open/Short).
• Resistance value of sensor is infinite or zero
(Open/Short).
• Resistance value of sensor is infinite or zero
(Open/Short).
• Resistance value of sensor is infinite or zero
(Open/Short).
During operation of compressor in HEAT mode,
the TE1 detection temp was higher than that of TL
by the specified value continued for 3 minutes or
more.
High-pressure Pd sensor and low-pressure Ps
sensor were exchanged, or output voltages of both
sensors are zero.
Output voltage of Ps sensor was zero.
Output voltage of Pd sensor was zero.
(Sensor Open)
Pd > 4.15MPa during stop of compressor
Indoor P.C. board did not operate normally.
Outdoor P.C. board (I/F) did not operate normally.
Check item (position)
• Check connection of TL sensor connector.
• Check characteristics of TL sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Check connection of TO sensor connector.
• Check characteristics of TO sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Check connection/cabling of TA sensor connector.
• Check characteristics of TA sensor resistance value.
• Check indoor P.C. board error.
• Check connection/cabling of TF sensor connector.
• Check characteristics of TF sensor resistance value.
• Check indoor P.C. board error.
• Check connection of TS1 sensor connector.
• Check characteristics of TS1 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• IGBT built-in temp sensor error
→
Exchange IPDU P.C. board.
• Check installation of TE1 sensor and TL sensor.
• Check characteristics of TE1 and TL sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Check connection of high-pressure Pd sensor connector.
• Check connection of low-pressure Ps sensor connector.
• Check pressure sensors Pd and Ps error.
• Check outdoor P.C. board (I/F) error.
• Check compression error of compressor.
• Misconnection of Ps sensor and Pd sensor connectors
• Check connection of Ps sensor connector.
• Check Ps sensor error.
• Check compression error of compressor.
• Check 4-way valve error.
• Check outdoor P.C. board (I/F) error.
• Check SV4 circuit error.
• Check connection of Pd sensor connector.
• Check Pd sensor error.
• Check outdoor P.C. board (I/F) error.
• Check indoor P.C. board error (EEPROM error).
• Check power voltage.
• Check power noise.
• Check outdoor P.C. board (I/F) error.
(*1) All stop only in case of the header unit The follower unit continues operation.
