Changing The Controller Program Version - Carrier CCU Controller Bedienungsanleitung

Faults
Low temperature
High temperature
Low humidity
High humidity

12 - CHANGING THE CONTROLLER PROGRAM VERSION

To change the µAirConnect2 controller fan version (update to the latest version, for example), the memory (EPROM) containing
the program must be replaced.
The CCU CONTROLLER Eprom must be changed when the unit is powered off (yellow LED on the console off) and the control
electrics box disconnect switch is open.
●
Replacing the CCU CONTROLLER memory
• Open the door of the vertical unit.
• Disconnect the connectors on the CCU CONTROLLER.
• Unscrew the mounting bolts on the CCU CONTROLLER enclosure.
• Mark the EPROM to be replaced. Component on support).
• Unplug the memory.
• Plug in the new memory (ensure the correct direction of fitting).
• Refit the CCU CONTROLLER enclosure and screw in its mounting screws.
• Reconnect the connectors on the CCU CONTROLLER.
• The unit can be restarted.
Sources
Temperature sensor
Malfunction
Drift in dehumidification mode
Temperature sensor
Malfunction
Room overheated
Humidity sensor
Malfunction
Humidity sensor
Malfunction
Excessively high humidity
EN - 26
Causes
• Check the sensor
Sensor
• Replace the sensor
• Check the stability of the control
• Check the operation of the heating valve or the electric heater
• Internal load insufficient
• Check the sensor
Sensor
• Replace the sensor
• Check the stability of the control
• Check the operation of the cooling valve, the compressors
• Revise the room loads
• Check the sensor
Sensor
• Replace the sensor
• Check the stability of the control
• Check the operation of the humidifier
• Revise the room loads
• Check the sensor
Sensor
• Replace the sensor
• Check the stability of the control
• Check the operation of the cooling valve, the compressors
• Revise the room loads
Solutions