• Code: 669-02
• Description: EEPROM communication error – Bus error
• Causes: When the machine retries three times after an error report has been received in the EEPROM communication, but the machine does not recover the communication, this SC is issued. • Noise • EEPROM not connected • EEPROM mounted in reverse • EEPROM defective
• Remedy: EEPROM not connected: • Reinstall the EEPROM on the MPU. EEPROM mounted in reverse: • Mount the EEPROM correctly on the MPU. EEPROM defective: • Replace the EEPROM on the MPU.

• Code: 669-03
• Description: EEPROM communication error – Device error
• Causes: When the machine retries three times after an error report has been received in the EEPROM communication, but the machine does not recover the communication, this SC is issued. • Noise • EEPROM not connected • EEPROM mounted in reverse • EEPROM defective
• Remedy: EEPROM not connected: • Reinstall the EEPROM on the MPU. EEPROM mounted in reverse: • Mount the EEPROM correctly on the MPU. EEPROM defective: • Replace the EEPROM on the MPU.

• Code: 669-04
• Description: EEPROM communication error – Communication abort error
• Causes: When the machine retries three times after an error report has been received in the EEPROM communication, but the machine does not recover the communication, this SC is issued. • Noise • EEPROM not connected • EEPROM mounted in reverse • EEPROM defective
• Remedy: EEPROM not connected: • Reinstall the EEPROM on the MPU. EEPROM mounted in reverse: • Mount the EEPROM correctly on the MPU. EEPROM defective: • Replace the EEPROM on the MPU.

• Code: 669-05
• Description: EEPROM communication error – Communication failed error
• Causes: When the machine retries three times after an error report has been received in the EEPROM communication, but the machine does not recover the communication, this SC is issued. • Noise • EEPROM not connected • EEPROM mounted in reverse • EEPROM defective
• Remedy: EEPROM not connected: • Reinstall the EEPROM on the MPU. EEPROM mounted in reverse: • Mount the EEPROM correctly on the MPU. EEPROM defective: • Replace the EEPROM on the MPU.

• Code: 669-06
• Description: EEPROM communication error – Device access inhibited
• Causes: When the machine retries three times after an error report has been received in the EEPROM communication, but the machine does not recover the communication, this SC is issued. • Noise • EEPROM not connected • EEPROM mounted in reverse • EEPROM defective
• Remedy: EEPROM not connected: • Reinstall the EEPROM on the MPU. EEPROM mounted in reverse: • Mount the EEPROM correctly on the MPU. EEPROM defective: • Replace the EEPROM on the MPU.

• Code: 669-07
• Description: EEPROM communication error – Buffer full error
• Causes: When the machine retries three times after an error report has been received in the EEPROM communication, but the machine does not recover the communication, this SC is issued. • Noise • EEPROM not connected • EEPROM mounted in reverse • EEPROM defective
• Remedy: EEPROM not connected: • Reinstall the EEPROM on the MPU. EEPROM mounted in reverse: • Mount the EEPROM correctly on the MPU. EEPROM defective: • Replace the EEPROM on the MPU.

• Code: 669-08
• Description: EEPROM communication error – Request parameter error
• Causes: When the machine retries three times after an error report has been received in the EEPROM communication, but the machine does not recover the communication, this SC is issued. • Noise • EEPROM not connected • EEPROM mounted in reverse • EEPROM defective
• Remedy: EEPROM not connected: • Reinstall the EEPROM on the MPU. EEPROM mounted in reverse: • Mount the EEPROM correctly on the MPU. EEPROM defective: • Replace the EEPROM on the MPU.

• Code: 790-00
• Description: Option PFU stack over When the power is turned ON, it is detected that the number of stacked PFUs exceeds the specified value.
• Causes: The number of stacked banks exceeds the specified value.
• Remedy: Install the optional PFU correctly. Only 2 optional PFUs can be installed on this machine.