• Code: U2 91
• Description: PCU memory check sum error
• Causes: EEPROM trouble EEPROM is not initialized. PCU PWB EEPROM access circuit trouble Uninitialized E2PROM installed.
• Remedy: Check that EEPROM is properly inserted. Save the counter/adjustment values with the DIAG simulation. Use DIAG (SIM16) to cancel U2 trouble. Replace the Controller PWB.

• Code: U6 00
• Description: Desk/LCC communication error Communication cable test error after turning on the power or exiting DIAG.
• Causes: Improper connection or disconnection of connector and harness Desk control PWB trouble Control PWB (PCU) trouble Malfunction by noise
• Remedy: Canceled by turning OFF/ON the power. Check connection of the harness and connector in the communication line.

• Code: U6 01
• Description: Desk/LCC No. 1 tray lift-up trouble
• Causes: Sensor trouble Desk control PWB trouble Gear breakage Lift-up motor trouble
• Remedy: Use DIAG (SIM4-2) to check the lift-up sensor detection. Use DIAG (SIM4-3) to check the lift-up motor operation.

• Code: U6 02
• Description: Desk No. 2 tray/LCC lift-up trouble
• Causes: Sensor trouble Desk control PWB trouble Gear breakage Lift-up motor trouble
• Remedy: Use DIAG (SIM4-2) to check the lift-up sensor detection. Use DIAG (SIM4-3) to check the lift-up motor operation.

• Code: U6 03
• Description: Desk no. 3 tray lift-up trouble
• Causes: Sensor trouble Desk control PWB trouble Gear breakage Lift-up motor trouble
• Remedy: Use DIAG (SIM4-2) to check the lift-up sensor detection. Use DIAG (SIM4-3) to check the lift-up motor operation.

• Code: U6 10
• Description: Desk/LCC transport motor operation trouble
• Causes: Motor lock Motor rpm abnormality Overcurrent to the motor Desk control PWB trouble
• Remedy: Use DIAG (SIM4-3) to check the transport motor operation.

• Code: U7 00
• Description: RIC communication trouble Communication cable test error after turning on the power or exiting DIAG.
• Causes: Disconnection of connector and harness RTC control PWB trouble Control PWB (Controller) trouble Malfunction by noise
• Remedy: Canceled by turning OFF/ON the power. Check connector and harness in the communication line.