With types 8HP, 10HP and 12HP the INV compressor is compressor 1, and the constant-speed compressor is compressor 2.
With types 14HP and 16HP, the INV compressor is compressor 1, and the constant-speed compressors (AC1, AC2) are compressors 2 and 3.
|Alarm Code||Alarm meaning|
|E06||Outdoor unit failed to receive serial communication signals from indoor unit.|
|E12||Automatic address setting start is prohibited.|
|E15||Automatic address setting alarm (too few units)|
|E16||Automatic address setting alarm (too many units)|
|E20||No indoor units at automatic address setting.|
|E25||Outdoor unit address setting failure (duplication)|
|E26||Mismatch in outdoor unit quantity|
|E29||Outdoor unit failed to receive communication from outdoor unit (main)|
|F04||Compressor 1 discharge temperature sensor trouble|
|F05||Compressor 2 discharge temperature sensor trouble|
|F22||Compressor 3 discharge temperature sensor trouble|
|F06||Gas temperature sensor trouble at outdoor heat exchanger 1 (In)|
|F07||Liquid temperature sensor trouble at outdoor heat exchanger 1 (Out)|
|F08||Outdoor air temperature sensor troubl|
|F12||Compressor intake temperature sensor trouble|
|F16||High-pressure sensor trouble|
|F17||Low-pressure sensor trouble|
|F23||Gas temperature sensor trouble at outdoor heat exchanger 2 (In)|
|F24||Liquid temperature sensor trouble at outdoor heat exchanger 2 (Out)|
|F25||Gas temperature sensor trouble at outdoor heat exchanger 3|
|F26||Liquid temperature sensor trouble at outdoor heat exchanger 3|
|F31||Outdoor unit non-volatile memory (EEPROM) trouble|
|H11||Constant speed compressor 2 overcurrent alarm|
|H12||Constant speed compressor 2 lock current alarm|
|H03||Compressor 1 CT sensor disconnected or short-circuit|
|H05||Compressor 1 discharge temperature sensor disconnected|
|H06||Low-pressure switch activated|
|H08||Compressor 1 oil detection sensor (connection) trouble|
|H13||Compressor 2 CT sensor disconnected or short-circuit|
|H15||Compressor 2 discharge temperature sensor disconnected|
|H21||Compressor 3 overcurrent alarm|
|H22||Compressor 3 lock current alarm|
|H23||Compressor 3 CT sensor disconnected or short-circuit|
|H25||Compressor 3 discharge temperature sensor disconnected|
|H27||Compressor 2 oil detection sensor (connection) trouble|
|H28||Compressor 3 oil detection sensor (connection) trouble|
|H31||HIC trouble alarm|
|L04||Outdoor system address duplication|
|L10||Outdoor unit capacity not set|
|L11||Incorrect wiring of remote group control wiring (in case of shared solenoid valve kit)|
|L17||Outdoor unit model mismatch|
|P03||Compressor 1 discharge temperature trouble|
|P04||High-pressure switch activated|
|P05||Reverse phase (or missing phase) detected|
|P16||Compressor 1 (INV) overcurrent|
|P17||Compressor 2 discharge temperature trouble|
|P18||Compressor 3 discharge temperature trouble|
|P22||Fan motor trouble|
|P26||Inverter compressor high-frequency overcurrent alarm|
|P29||Inverter compressor missing phase or lock alarm|
Currently the blinking inspection display can be displayed only on the wired remote controller and system remote controller.
Blinking inspection display (1) (Automatic backup)
|Alarm Code||(Blinking inspection display)|
|Alarm meaning||Automatic backup is in progress. A/C units can be operated.
Status: The compressor at one of the outdoor units where the outdoor unit fan is running should
* Blinking inspection display also occurs when seizing of the compressor magnet SW is
detected. Because this may also be the case, refer to “Blinking inspection display
(compressor magnet SW seizing detection).”
|Alarm conditions||When alarm P16, P22, P26, P29, Hx1, Hx2, or H31 has occurred, correcting the control device (remote controller, etc.) input engages this mode.|
|Probable cause||Because alarm P16, P22, P26, P29, Hx1, Hx2, or H31 has occurred, check the alarm history then refer to the corresponding items.|
|Check||Check the power at the indoor and outdoor units, and check the inter-unit control wiring.|
|Correction||Follow the instructions in the corresponding items to correct the trouble.|
|Recovery||After repairing the malfunctioning locations, reset the power for the system (all outdoor units).
Caution: Automatic backup mode will not be canceled until the power is reset.
Automatic backup mode is not engaged in cases of alarms other than those listed above.
Blinking inspection display (2) (compressor magnet SW seizing detection)
|Alarm Code||(Blinking inspection display)|
|Alarm meaning||Compressor magnet SW seizing detected Status: Although an outdoor unit exists where the outdoor unit fan is running, no compressors in the system are operating. Because the fan is running only at the outdoor unit where seizing was detected, check the corresponding outdoor unit. * The fan may also run on its own when fan cracking prevention control is in effect or when snowfall sensor input is present. Therefore monitor for approximately 10 minutes if the outdoor unit fans are operating at multiple units.|
Current is detected in the CT circuit when the compressor is stopped.
The effects of electrical noise are difficult to identify unless a PC is connected and the conditions are monitored for a long period of time.