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14. TROUBLESHOOTING
Outdoor unit
24K/36K
DC-Inverter unitary (Main control board upside-down)
1) Fault code displayed by LED lamps on outdoor main control board.
There are 3 LED lamps on control board, LED1, LED2 and LED3.
LED1 indicates the ten's place of the fault code, LED2 indicates the unit's place of the fault
code and LED3 indicates outdoor drive control fault.
When LED3 is off, LED1 and LED 2 indicate main control fault code.
When LED3 is on, LED1 and LED 2 indicate drive control fault code.
When LED3 is flickering and LED1, LED 2 are all off, it indicates the compressor is preheating.
Failures display with 5s interval. It means LED will be off for 5s to report the next fault code.
System protection codes display method is the same with main control fault code.
LED lamps will be off when there is no failure, protection or preheating.
For example, outdoor main control fault 32:
For example, outdoor drive fault 32:
LED1: Ten's place
LED2: Unit's place
LED3: Drive failure indicator
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