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Back to Carrier Crossover 47000 BTU Up to 15.6 SEER2 High Heat Capable Heat Pump Condensing Unit R-410A (208/230-1)

Carrier Crossover 47000 BTU Up to 15.6 SEER2 High Heat Capable Heat Pump Condensing Unit R-410A (208/230-1) troubleshooting and error codes

Use this table to identify what the visible code may mean and what information to share when scheduling service. Keep checks simple and visible; do not open electrical, refrigerant, gas, or sealed equipment compartments.

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Error-code table

Search codes for Crossover 47000 BTU Up to 15.6 SEER2 High Heat Capable Heat Pump Condensing Unit R-410A (208/230-1)

Code Meaning System area Safe first step Action
EC 51 Outdoor EEPROM malfunction Outdoor control board Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
EL 01 Indoor / outdoor units communication error Indoor-outdoor communication Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
EL 16 Communication malfunction between adapter board and outdoor main board Control communication Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 00 IPM module protection Inverter module Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 02 Compressor top temperature or IPM high temperature protection Compressor / inverter module Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 06 Compressor discharge temperature protection Compressor discharge Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 08 Outdoor overcurrent protection Outdoor electrical protection Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 0A High temperature protection of condenser Condenser coil Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 0F PFC module protection Power-factor correction module Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 10 Outdoor unit low AC voltage protection Outdoor power supply Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 11 Outdoor main control board DC bus high voltage protection Outdoor main control board Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 12 Outdoor main control board DC bus high voltage protection / 341 MCE error Outdoor main control board Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 30 High pressure protection Refrigerant pressure Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 31 Low pressure protection Refrigerant pressure Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 40 Communication malfunction between IPM board and outdoor main board Inverter communication Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 41 Outdoor compressor current sampling circuit failure Compressor current sensing Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 43 Outdoor compressor lack phase protection Compressor phase protection Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 44 Outdoor unit zero speed protection Outdoor drive control Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 45 Outdoor unit IR chip drive failure Outdoor drive control Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 46 Compressor speed out of control Compressor drive Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 49 Compressor overcurrent failure Compressor electrical protection Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
EC 52 Condenser coil temperature sensor T3 open circuit or short circuit Temperature sensor Record the displayed code or LED pattern, confirm thermostat or controller demand, check visible airflow and outdoor-area conditions, and schedule service if the condition remains. View details
EC 53 Outdoor room temperature sensor T4 open circuit or short circuit Temperature sensor Record the displayed code or LED pattern, confirm thermostat or controller demand, check visible airflow and outdoor-area conditions, and schedule service if the condition remains. View details
EC 54 Compressor discharge temperature sensor TP open circuit or short circuit Temperature sensor Record the displayed code or LED pattern, confirm thermostat or controller demand, check visible airflow and outdoor-area conditions, and schedule service if the condition remains. View details
EC 57 Refrigerant pipe temperature sensor error Temperature sensor Record the displayed code or LED pattern, confirm thermostat or controller demand, check visible airflow and outdoor-area conditions, and schedule service if the condition remains. View details
EC 5C High pressure sensor open circuit or short circuit Pressure sensor Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
EC 71 Outdoor DC fan motor overcurrent failure Outdoor fan motor Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
EC 72 Outdoor DC fan motor lack phase failure Outdoor fan motor Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
EC 73 Outdoor DC fan motor zero-speed failure Outdoor fan motor Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
EC 07 Outdoor fan speed out of control Outdoor fan motor Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
PC 0L Low ambient temperature protection Outdoor operating conditions Record the displayed code or LED pattern, confirm thermostat or controller demand, check visible airflow and outdoor-area conditions, and schedule service if the condition remains. View details
LC 06 High temperature protection of IPM module Inverter module Record the displayed code or LED pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details

Safety note

What is safe to check before service

These pages are meant to help document the issue, not replace diagnosis. GreenFlow should handle pressure-switch, electrical, refrigerant, lockout, recurring, and warranty-related conditions.

Safe visible checks

  • Thermostat display and settings
  • Filter condition and return-air path
  • Visible outdoor-unit obstruction
  • Photos of the code, unit, and nameplate

Stop and call

  • Repeated lockouts or recurring faults
  • Pressure-switch or sensor faults
  • Electrical odor, unusual noise, or ice buildup
  • Any sealed cabinet, refrigerant, gas, or warranty issue

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