How to fix Carrier Air Handlers processor memory fault caused by high heat sink temperature?
If the heat sink temperature has exceeded the maximum operating temperature, ensure that the VFD refrigerant isolation valves are open. Also, inspect the VFD refrigerant cooling orifice and refrigerant strainer. Finally, check for proper VFD cooling fan operation and ensure there is no airflow blockage.
What to do if Carrier Air Handlers show processor memory fault due to exceeding current limit?
If the drive output current has exceeded the hardware current limit, check for high entering water temperature or low condenser water flow. Also, verify the current settings in the VFD_CONF (PIC III) or CFGUMVFD (PIC 6) screen.
What to do if Carrier Air Handlers display processor memory fault due to software configuration?
To address a processor memory fault potentially caused by software configuration issues, cycle power to the chiller to reset the processor. After restarting, carefully check the VFD_CONF settings and ensure you save the settings when exiting the VFD_CONF (PIC3) or CFGUMVFD (PIC6) configuration screen.
How to resolve Carrier Air Handlers processor memory fault due to high transistor temperature?
If the output transistors have exceeded the maximum operating temperature, make sure that the VFD refrigerant isolation valves are open. Also, inspect the VFD refrigerant cooling orifice and refrigerant strainer. Finally, check for proper VFD cooling fan operation and ensure there is no airflow blockage.
What should I check if my Carrier Air Handlers have a processor memory fault and ground fault?
If there's a current path to earth ground greater than 25% of the drive rating, check the motor, motor terminals, and external wiring to the drive output terminals for a grounded condition.
What to do if Carrier Air Handlers show processor memory fault after moving the control board?
If the main control board was moved to a different power structure, causing the data to default, press the ICVC reset (PIC3) or Reset alarm (PIC6). Next, check the VFD_CONF (PIC3) or CFGUMVFD (PIC6) parameters. Finally, cycle the power to the drive.
How to fix Carrier Air Handlers processor memory fault when the power structure is not recognized?
If the main control board did not recognize the power structure, flash it with a newer Application version software.
What to do if Carrier Air Handlers show processor memory fault because the motor didn't reach speed?
If the motor did not come up to speed in the allotted time, check that the guide vanes are closed completely. Also, check for high entering water temperature or low condenser flow. Finally, repeat the Autotune process.
How to resolve Carrier Air Handlers processor memory fault due to checksum mismatch?
If the checksum read from the board does not match the calculated checksum, press the ICVC reset (PIC3) or Reset alarm (PIC6). Check the VFD_CONF parameters and cycle power to the drive.
What to do if Carrier Air Handlers show processor memory fault due to current loss in phases?
If the current in one or more phases has been lost or remains below a preset level, check the Motor Current % Imbalance in the VFD_CONF (PIC3) or CFGUMVFD (PIC6) screen.
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