CYB-20/CYK-24/FYB-24/RYB-20/UYB-20
Error Code Table for CYB-20, CYK-24, FYB-24, RYB-20, and UYB-20 Systems
This article provides an error code table for CYB-20, CYK-24, FYB-24, RYB-20, and UYB-20 light-commercial HVAC systems.
EC07, EH03, EH31, and EH32 Error Codes
These codes indicate an abnormal fan speed in either the outdoor or indoor unit.
EC51, EH00, and EH0A Error Codes
These codes indicate an EEPROM parameter error in either the indoor or outdoor unit.
EC52, EC53, EC54, EC55, EH60, and EH61 Error Codes
These codes indicate temperature sensor errors.
EH0b Error Code
This code indicates a communication error between the display board and indoor unit PCB.
EH0E Error Code
This code indicates a water-level alarm error.
EH3A, EH3b, and EHbA Error Codes
These codes indicate fan-related faults involving either the outdoor fan’s DC bus voltage or communication with the indoor fan module.
EHb3 Error Code
This code indicates a communication error between the wired controller and indoor unit PCB.
EHC1 and EHC2 Error Codes
These codes indicate refrigerant-related faults and the refrigerant sensor reading is out of range.
EHC3 and FHCC Error Codes
These codes indicate a problem with the refrigerant sensor, either an out-of-range reading or a sensor fault.
EL01 Error Code
This code indicates a communication error between the indoor and outdoor units.
EL0C Error Code
This code indicates an insufficient refrigerant level for the unit.
PC00 Error Code
This code indicates that the outdoor unit’s IPM protection has been activated.
PC01 Error Code
This code indicates that the outdoor unit’s voltage protection has been activated.
PC02 Error Code
This code indicates that the compressor top temperature or IPM temperature protection has been activated.
PC03 Error Code
This code indicates high or low pressure protection has been activated.
PC04 Error Code
This code indicates an inverter compressor drive error.
PC0L Error Code
This code indicates the outdoor unit low ambient temperature protection has been activated.