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Check code
Outdoor 7-segment display
Main
remote
controller
Check code Sub-code
AI-NET
central control
remote controller
Detected
position
Check code
name
Status Error detection condition Check item (position)
E31 E31 01: IPDU1 error
02: IPDU2 error
03: IPDU1, 2 errors
04: Fan IPDU error
05: IPDU1 + Fan IPDU error
06: IPDU2 + Fan IPDU error
07: All IPDU error or communication error
between IPDU and I/F P.C. board or
outdoor I/F P.C. board error
CF I/F IPDU
communication
error
All stop Communication of each IPDU
(P.C. board) in inverter box
interrupted.
• Check connection of communication connector and
disconnection between IPDU and I/F P.C. board.
• Check outdoor P.C. board (I/F, IPDU, Fan IPDU) error.
• Check external noise.
• Check power supply P.C. board for fan error.
F01 —— OF Indoor unit
Indoor TCJ
sensor error
Correspondin
g
unit only stops
• Resistance value of sensor is
infinite or zero. (Open/Short)
• Check connection/cabling of TCJ sensor connector.
• Check characteristics of TCJ sensor resistance value.
• Check indoor P.C. board error.
F02 —— Od Indoor unit Indoor TC2
sensor error
Correspondin
g
unit only stops.
• Resistance value of sensor is
infinite or zero (Open/Short).
• Check connection/cabling of TC2 sensor connector.
• Check characteristics of TC2 sensor resistance value.
• Check indoor P.C. board error.
F03 —— 93 Indoor unit Indoor TC1
sensor error
Correspondin
g
unit only stops.
• Resistance value of sensor is
infinite or zero (Open/Short).
• Check connection/cabling of TC1 sensor connector.
• Check characteristics of TC1 sensor resistance value.
• Check indoor P.C. board error.
F04 F04 — 19 I/F
TD1 sensor
error
All stop
• Resistance value of sensor is
infinite or zero (Open/Short)
• Check connection of TD1 sensor connector.
• Check characteristics of TD1 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
F05 F05 — A1 I/F TD2 sensor
error
All stop • Resistance value of sensor is
infinite or zero (Open/Short)
• Check connection of TD2 sensor connector.
• Check characteristics of TD2 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
F06 F06 — 18 I/F TE1 sensor
error
All stop • Resistance value of sensor is
infinite or zero (Open/Short).
• Check connection of TE1 sensor connector.
• Check characteristics of TE1 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
F07 F07 — 18 I/F TL sensor error All stop
• Resistance value of sensor is
infinite or zero (Open/Short).
• Check connection of TL sensor connector.
• Check characteristics of TL sensor resistance value.
• Check outdoor P.C. board (I/F) error.
F08 F08 — 1b I/F TO sensor
error
All stop • Resistance value of sensor is
infinite or zero (Open/Short).
• Check connection of TO sensor connector.
• Check characteristics of TO sensor resistance value.
• Check outdoor P.C. board (I/F) error.
F10 —— OC Indoor Indoor TA
sensor error
Correspondin
g
unit only stops.
• Resistance value of sensor is
infinite or zero (Open/Short).
• Check connection/cabling of TA sensor connector.
• Check characteristics of TA sensor resistance value.
• Check indoor P.C. board error.
F12 F12 01: TS1
02: TS2
A2 I/F
TS1, TS2
sensor error
All stop
• Resistance value of sensor is
infinite or zero (Open/Short).
• Check connection of TS1 or TS2 sensor connector.
• Check characteristics of TS1, TS2 sensor resistance value.
• Check outdoor P.C. board (I/F) error.