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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)
P01 —— 11 Indoor Indoor fan
motor error
Correspondin
g
unit only stops.
• Check the lock of fan motor (AC fan).
• Check cabling.
P03 P03 — 1E I/F Discharge
temp TD1
error
All stop Discharge temp (TD1)
exceeded 115°C.
• Check full opening of outdoor service valves (Gas side, Liquid side).
• Check clogging of outdoor PMV. (PMV1,2)
• Check characteristics of TD1 sensor resistance value.
• Check refrigerant shortage.
• Check 4-way valve error.
• Check leakage of SV41 circuit.
• Check SV4 circuit. (Miswiring and misinstallation of SV41 and SV42)
• Check leakage of SV5 circuit.
• Check leakage of SV6 circuit. (Capillary clogging, valve operation error)
• Check mispiping of discharge gas/suction gas main pipe.
• Check Flow selector unit.
Check leakage of SVD valve and SVS valve.
(Check leakage of SVDD valve and SVSS.)
Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas), wiring
between FS unit and indoor unit, and connection of connectors.
Check miswiring of SVS/SVD valves.
P04 P04 01: Compressor 1 side
02: Compressor 2 side
21 I/F
Actuation of
high-pressure
SW
All stop High-pressure SW actuated. • Check Pd pressure sensor error.
• Check full opening of outdoor service valves (Gas side, Liquid side).
• Check outdoor fan error.
• Check outdoor fan motor error.
• Check clogging of outdoor PMV. (PMV1,2)
• Check clogging of indoor/outdoor heat exchangers.
• Check short-circuiting of outdoor suction/discharge air.
• Check clogging of SV2 circuit.
• Check outdoor P.C. board (I/F) error.
• Check indoor fan system error. (Cause of air volume decrease)
• Check opening of indoor PMV.
• Check miscabling of communication line between indoor and outdoor.
• Check operation error of check valve of discharge pipe.
• Check SV4 valve circuit.
• Check SV5 valve circuit.
• Check refrigerant overcharge.
• Check mispiping of discharge gas/suction gas main pipe.
• Check circuit clogging at auxiliary heat exchanger side. (PMV3, SV12, check valve)
• Check FS unit.
Check clogging of SVD valve and operation error.
Check wiring inside of FS unit. (SVD/SVS coil miswiring, etc.)
Check wiring between FS unit and indoor unit.
(Miswiring, Disconnection, Wiring missing)
P05 P05 01: Power supply
missing phase
02: Power supply
phase order
(reversed phase)
AF I/F Phase missin
g
or reversed
phase order
All stop • Missin
g
phase was detected
when the power turned on.
• Reversed phase was
detected when the power
turned on.
• Check outdoor power line.
• Check outdoor P.C. board (I/F) error.