• Code: U6-79
• Description: LCT4 lift motor troubleU6-83
• Causes: Sensor trouble, upper limit SW trouble, A3 2-stage LCT control PWB trouble, broken gear, lift motor trouble
• Remedy: Use SIM04-02 and SIM04-03 to check the operation of the upper limit sensor, the upper limit SW, the encoder sensor, and the lift motor. Fix the trouble, and use SIM15 to cancel the trouble.

• Code: U6-81
• Description: Power unit cooling fan motor trouble (1 series)
• Causes: Motor lock, motor harness short/open, A3 2-stage LCT control PWB trouble, harness and connector connection trouble
• Remedy: Check connection from the A3 2-stage LCT control PWB to the motor. Replace the A3 2-stage LCT control PWB. Replace the motor.

• Code: U6-82
• Description: EEPROM trouble (1 series)
• Causes: A3 2-stage LCT control PWB trouble Malfunction caused by noises
• Remedy: Replace the A3 2-stage LCT controller PWB

• Code: U6-83
• Description: Room temperature thermistor breakdown (1 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: U6-84
• Description: Room humidity thermistor breakdown (1 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: U6-85
• Description: Transport motor 1 trouble (2 series)
• Causes: Motor lock Motor RPM abnormality Overcurrent to the motor A3 2-stage LCT control PWB trouble
• Remedy: Use SIM04-03 to check the operation of the transport motor. Replace the motor. Replace the A3 2-stage LCT control PWB.

• Code: U6-86
• Description: 24V power trouble (2 series)
• Causes: Connection trouble or disconnection of the connector and the harness. A3 2-stage LCT control PWB trouble Power unit trouble
• Remedy: Check the connector and the harness of the power line. Check the 24V voltage with the power unit and the A3 2-stage LCT control PWB.

• Code: U6-87
• Description: Power unit cooling fan motor trouble (2 series)
• Causes: Motor lock, motor harness short/open, A3 2-stage LCT control PWB trouble, harness and connector connection trouble
• Remedy: Check connection from the A3 2-stage LCT control PWB to the motor. Replace the A3 2-stage LCT control PWB. Replace the motor.