• Code: U6-88
• Description: EEPROM trouble (2 series)
• Causes: A3 2-stage LCT control PWB trouble Malfunction caused by noises
• Remedy: Replace the A3 2-stage LCT control PWB.

• Code: U6-89
• Description: Room temperature thermistor breakdown (2 series)
• Causes: Room temperature thermistor harness connection trouble Room temperature thermistor trouble A3 2-stage LCT control PWB trouble
• Remedy: Check connection of the harness and the connector of the room temperature thermistor. Replace the temperature and humidity sensor. Check the A3 2-stage LCT control PWB.

• Code: U6-90
• Description: Room humidity thermistor breakdown (2 series)
• Causes: Humidity thermistor harness connection trouble Humidity thermistor trouble A3 2-stage LCT control PWB trouble
• Remedy: Check connection of the harness and the connector of the humidity thermistor. Replace the temperature and humidity sensor. Check the A3 2-stage LCT control PWB.

• Code: U7-50
• Description: MFPC PWB - Vendor machine communication error
• Causes: Improper setting of the vendor machine specifications (SIM26-3). Vendor machine trouble. MFPC PWB trouble. Connector, harness connection trouble. Strong external noises.
• Remedy: Cancel the error by turning OFF/ON the power. Check the connector and the harness in the communication line. Change the specifications of the vendor machine (SIM26-3). Replace the MFPC PWB.

• Code: U7-51
• Description: Vendor machine error
• Causes: Serial vendor machine trouble. Connector, harness connection trouble
• Remedy: Err.XX is displayed on the operation panel of the vendor. (XX is the detail code.) Repair the vendor machine referring to the detail code. Check the connector and the harness in the communication line.

• Code: U9-01
• Description: Touch panel trouble
• Causes: SUC PWB trouble
• Remedy: Check connection signal between the SCU CPU and the touch panel controller.

• Code: UC-02
• Description: IPD/DOCC-ASIC (CPT function) trouble
• Causes: SCU PWB trouble. (IPD/DOCC-ASIC trouble.)
• Remedy: Replace the SCU PWB

• Code: UC-12
• Description: IPD/DOCC-ASIC (CPT function) trouble [DSPF detection]
• Causes: DSPF PWB trouble (IPD/DOCC-ASIC trouble).
• Remedy: Replace the DSPF PWB.