• Code: F020
• Description: RAM R/W error
  The average AD value of the sensor input is smaller than 2 during SLP_RLY is off and 300 ms.
• Causes: Defective main PWB.
• Remedy: Defective main PWB. Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB .

• Code: F040
• Description: Communication Error between Main PCB and Engine PCB
  Communication is failed between the controller and the engine.
• Causes: Defective main PWB.
• Remedy: Defective main PWB. Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB .

• Code: F050
• Description: No Engine Main Program
  Engine program failure.
• Causes: Defective engine software. Defective main PWB.
• Remedy: Defective engine software. Install the engine software.
  Defective main PWB. Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB .