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(*1) All stop only in case of the header unit The follower unit continues operation.
MG-SW : Magnet Switch, OCR : Over-current Relay
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)
F13 F13 01: Compressor 1 side
02: Compressor 2 side
43 IPDU TH sensor error All stop • Resistance value of sensor is
infinite or zero (Open/Short).
• IGBT built-in temp sensor error
→
Exchange IPDU P.C. board.
F15 F15 — 18 I/F Outdoor temp sensor
miscabling (TE1, TL)
All stop During operation of
compressor in HEAT mode, the
TE1 detection temp was hi
g
her
than that of TL by the specified
value continued for 3 minutes
or more.
• 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.
F16 F16 — 43 I/F Outdoor pressure
sensor miscabling
(Pd, Ps)
All stop High-pressure Pd sensor and
low-pressure Ps sensor were
exchanged, or output voltages
of both sensors are zero.
• 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.
F23 F23 — 43 I/F Ps sensor error All stop Output voltage of Ps sensor
was zero.
• 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.
F24 F24 — 43 I/F Pd sensor error All stop Output volta
g
e of Pd sensor
was zero. (Sensor Open)
Pd > 4.15MPa during stop of
compressor
• Check connection of Pd sensor connector.
• Check Pd sensor error.
• Check outdoor P.C. board (I/F) error.
F29 —— 12 Indoor Indoor other error
Correspondin
g
unit only stops.
Indoor P.C. board did not
operate normally.
• Check indoor P.C. board error (EEPROM error).
F31 F31 — 1C I/F Outdoor EEPROM error All stop (*1)
Outdoor P.C. board (I/F) did not
operate normally.
• Check power voltage.
• Check power noise.
• Check outdoor P.C. board (I/F) error.
H01 H01 01: Compressor 1 side
02: Compressor 2 side
1F IPDU Compressor breakdown All stop
Inverter current detection circuit
detected over-current and
stopped.
• Check power voltage. (AC220–240V ± 10%).
• Check compressor error.
• Check cause of abnormal overload operation.
• Check outdoor P.C. board (IPDU) error.
H02 H02 01: Compressor 1 side
02: Compressor 2 side
1d IPDU Compressor error (lock)
MG-SW error
OCR operation
All stop Over-current was detected
several seconds after header
compressor had started.
• Check compressor error.
• Check power voltage. (AC380–10%, 415V +10%).
• Check cable of compressor and phase-missing.
• Check connector/terminal connection on IPDU P.C. board.
• Check conduction of case heater.
(Check activation error due to liquid stagnation in compressor.)
• Check outdoor P.C. board (IPDU) error.
• Check outdoor MG-SW or OCR.