• Code: C0100
• Description: Backup memory (EEPROM) device problem (Main PWB) Reading from or writing to EEPROM cannot be performed.
• Causes: Defective main PWB. Device damage of EEPROM.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation.
  Device damage of EEPROM. Contact the Service Administrative Division.

• Code: C0120
• Description: MAC address data error
  For data in which the MAC address is invalid.
• Causes: Defective main PWB.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation.

• Code: C0150
• Description: Backup memory (EEPROM) device problem (Engine PWB)
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs eight times successively. Mismatch between writing data and reading data occurs eight times successively.
• Causes: Defective engine PWB. Device damage of EEPROM.
• Remedy: Defective engine PWB. Replace the engine PWB and check for correct operation.
  Device damage of EEPROM. Contact the Service Administrative Division.

• Code: C0160
• Description: Backup memory (EEPROM) data problem (Engine PWB)
  Reading data from EEPROM is abnormal.
• Causes: Data damage of EEPROM.
• Remedy: Data damage of EEPROM. Contact the Service Administrative Division.

• Code: C0170
• Description: Copy counts problem
  A checksum error is detected in the main and sub backup memories for the copy counters.
• Causes: Data damage of EEPROM. Defective PWB.
• Remedy: Data damage of EEPROM. Contact the Service Administrative Division.
  Defective PWB. Replace the main PWB or engine PWB and check for correct operation.

• Code: C0180
• Description: Machine number mismatch error
  Machine number of main PWB and engine PWB does not match.
• Causes: Data damage of EEPROM.
• Remedy: Data damage of EEPROM. Contact the Service Administrative Division.

• Code: C0320
• Description: Power CPU communication problem
  A communication error is detected 10 times in succession.
• Causes: Defective engine PWB.
• Remedy: Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C0640
• Description: Hard disk drive problem
  The hard disk cannot be accessed.
• Causes: Poor contact in the connector terminals. Defective hard disk. Defective main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection the main PWB and the hard disk, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective hard disk. Run U024 (HDD formatting) without turning the power off to initialize the hard disk. Replace the hard disk drive and check for correct operation if the problem is still detected after initialization.
  Defective main PWB. Replace the main PWB and check for correct operation.