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Using indoor unit indicators (receiving unit light block) (wireless type)
To identify the check code, check the 7-segment display on the header unit. To check for check codes not
displayed on the 7-segment display, consult the “List of Check Codes (Indoor Unit)” in “9-2. Troubleshooting
Method”.
: Goes off
: Lighting
: Blinking (0.5 seconds)
MG-CTT: Magnet contactor
Light block
Timer
All lights out
Ready
Power turned off or error in wiring between receiving and indoor units—
E01 Faulty reception
Error or poor contact in wiring
between receiving and indoor units
Setting error
Receiving unit
Operation
Timer Ready
Operation
Blinking
Timer Ready
Operation
Blinking
Check code Cause of fault
P01 Indoor AC fan error
Timer Ready
Operation
Alternate blinking
P10 Indoor overflow error
P04 Activation of outdoor high-pressure SW
P15 Gas leak detection - insufficient refrigerant charging
P17 Outdoor discharge (TD2) temperature error
P18 Outdoor discharge (TD3) temperature error
P19 Outdoor 4-way valve reversing error
P20 Activation of high-pressure protection
P22 Outdoor fan IPDU error
P26 Outdoor G-Tr short-circuit error
P29 Compressor position detection circuit error
P31 Shutdown of other indoor unit in group due to fault (group follower unit error)
P07 Outdoor heat sink overheating error - Poor cooling of electrical component (IGBT) of outdoor unit
P05
Open phase/power failure
Inverter DC voltage (Vdc) error
MG-CTT error
P12 Indoor DC fan error
E04
Error or poor contact in wiring between indoor and outdoor units
(loss of indoor-outdoor communication)
P13 Outdoor liquid backflow detection error
E02 Faulty transmission
E03 Loss of communication
E08 Duplicated indoor unit No. (address)
E09 Duplicated master remote controller
E10 Indoor unit inter-MCU communication error
E12 Automatic address starting error
E07 Faulty transmission in indoor-outdoor communication
E15 Indoor unit not found during automatic address setting
E16 Too many indoor units connected/overloading
E19 Error in number of outdoor header units
E20 Detection of refrigerant piping communication error during automatic address setting
E23 Faulty transmission in outdoor-outdoor communication
E25 Duplicated follower outdoor address
E26 Faulty reception in outdoor-outdoor communication, dropping out of outdoor unit
E28 Outdoor follower unit error
E31 IPDU communication error, Sub MCU communication error
E06 Faulty reception in indoor-outdoor communication (dropping out of indoor unit)
E18 Error or poor contact in wiring between indoor units, indoor power turned off
P03 Outdoor discharge (TD1) temperature error
Timer Ready
Operation
Alternate blinking
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