Description: Operation panel PWB communication error
Causes: Defective main PWB. Defective operation panel PWB.
Remedy: Defective main PWB. Replace the main PWB and check for correct operation. Defective operation panel PWB. Replace the operation panel PWB and check for correct operation.
Code: F020
Description: Memory checksum error
Causes: Defective main PWB. Defective expansion memory.
Remedy: Defective main PWB. Replace the main PWB and check for correct operation. Defective expansion memory. Replace the expansion memory and check for correct operation.
Code: F040
Description: Engine PWB communication error
Causes: Defective main PWB. Defective engine PWB.
Remedy: Defective main PWB. Replace the main PWB and check for correct operation. Defective engine PWB. Replace the engine PWB and check for correct operation.
Code: F050
Description: Engine ROM checksum errorl PWB.
Causes: Defective engine PWB.
Remedy: Defective engine PWB. Replace the engine PWB and check for correct operation.
Code: F278
Description: Power source PWB secondary side error
Causes: Defective power source PWB.
Remedy: Defective power source PWB. Replace the power source PWB and check for correct operation.