Carrier DLFSOAH - Troubleshooting

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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TROUBLESHOOTING
For ease of service, the systems are equipped with diagnostic code display LEDs on both the indoor and outdoor units. The indoor diagnostic display is
a combination of flashing LEDs on the display panel or the front of the unit.
Some indoor units display error codes specifying failure modes in the outdoor units. If possible, always check the diagnostic codes displayed on the
indoor unit first.
The diagnostic codes displayed in the indoor and outdoor units are listed in Table 10.
INDOOR UNIT DIAGNOSTIC GUIDES
Table 10 — Indoor Unit Diagnostic Codes
NOTE: The digital tube shows that DF / FC is in normal operation state, not fault or protection.
For additional diagnostic information, refer to the service manual.
DISPLAY MALFUNCTION AND PROTECTION INDICATION
EH00 Indoor EEPROM malfunction
EH0A Indoor EEPROM parameter error
EL01 Communication malfunction between indoor and outdoor units
EL11 Communication malfunction between main unit and secondary units
EH12 Main unit or secondary units malfunction
EH03 Indoor fan speed malfunction
EC50 Outdoor temperature sensor error
EC51 Outdoor EEPROM malfunction
EC52 Condenser coil temperature sensor(T3) malfunction
EC53 Outdoor ambient temperature sensor(T4) malfunction
EC54 Outdoor unit exhaust temperature sensor error
EC05 Outdoor Temperature Sensor Error or EEPROM Error
EC0d Outdoor unit malfunction or Protection
EH60 Indoor Room Temperature Sensor T1 Error
EH61 Indoor Evaporator coil Temperature Sensor T2 Error
EHbA Communication malfunction between external fan module and indoor unit
EH3A External fan DC bus voltage is too low protection door unit
EH3b External fan DC bus voltage is too high fault
EC07 Outdoor DC fan speed malfunction
EH0b Indoor PCB and display board communication error
EL0C Refrigerant leakage detection
EH0E Indoor water level warning Error
FH07 Communication malfunction between indoor unit and auto-lifting panel
FH0P WIFI dongle self-check malfunction
FL09 New and old platform match malfunction
PH11 Over low voltage protection of indoor unit
PH12 Over high voltage protection of indoor unit
PC00 Inverter module (IPM) protection
PC01 Over high voltage or over low voltage protection
PC02 High temperature protection of compressor top/ IPM Temperature protection
PC04 Inverter compressor drive Error
PC60 Discharge high temperature Error
PC03 Low pressure protection
PC0L Low temperature protection of outdoor unit
---- Indoor units mode conflict