| LED 301 flashes |
Range: Summit / Mono / Multizone Indoor unit |
| 01 | Indoor coil is too warm in cooling mode or too cold in heating mode. Reversing valve or coil thermistor is faulty |
| 02 | Forced operation from the outdoor unit. This is not an error |
| 03 | Communication error. Faulty wiring, indoor or outdoor PCB faulty |
| 04 | Outdoor unit fault. Check the number of flashes on outdoor PCB LED 301 to confirm exact problem |
| 06 | Float switch activated. Check pump operation and drain |
| 07 | Drain pump forced operation. Drain test switch in test position, faulty PCB |
| 08 | Louvre not opening. Louvre motor faulty, microswitch faulty, PCB faulty (FtAF unit only) |
| 09 | Faulty indoor unit thermistor. Air inlet or coil thermistor not connected, open or short circuited faulty PCB |
| 10 | Indoor fan motor over current or abnormal rotation speed. Faulty motor or PCB |
| 13 | Eprom data error. Faulty PCB |
| LED 301 flashes | Range: Summit / Mono / Multizone outdoor unit |
| 1 | Normal, unit powered up |
| 2 | Over current on the compressor Faulty PCB or locked compressor |
| 2 with LED302 lit |
Over current on the compressor System power module or PCB failure |
| 3 | Compressor rotation speed is low, abnormal compressor rotor position Faulty system power module, faulty compressor or PCB |
| 4 | Switching failure on the compressor Faulty system power module, faulty compressor or PCB |
| 5 | Compressor rotation low with over current detected High pressure detected, faulty fan motor/circuit or abnormally low voltage |
| 6 | Discharge thermistor temperature rising Short of refrigerant charge, faulty thermistor, faulty compressor faulty fan motor/circuit or main PCB |
| 7 | Faulty thermistor (Summit and Monozone only) |
| 8 | Compressor not accelerating above minimum rotation speed Short of refrigerant charge or faulty compressor |
| 9 | Communication error C/D terminals not connected, faulty interconnecting cable PCB failure {Summit and Monozone only) |
| 10 | Abnormal voltage Mains voltage incorrect or faulty reactor |
| 12 | Fan motor rotation is abnormal Faulty fan motor or PCB {check fuse) |
| 13 | Eprom error Main PCB failure |
| 14 | Over voltage is detected by system power module Faulty SPM |