DIY HVAC Tools

Blueridge mini split error codes

Blueridge (Alpine Home Air's brand) has used more than one maker. The BMKH series, from the 2016 units through the current floor-ceiling models, is Gree-built: its manuals list the Gree table (E1 high pressure, E6 communication, F0 refrigerant, C5 jumper). The newer BMY and BMX S-series single-zone units ship with Midea's owner's manual (document CS78421, the same one Pioneer's Midea-built units use), so those are listed here under the Midea codes. Check the model number on the indoor unit's label.

Covers: BMKH wall-mount, floor-ceiling and multi-zone (2016 and later), BMY / BMX S-series single-zone (2023 and later).

Type it exactly as the unit shows it. Not sure which brand? It is printed on the front of the indoor unit.

All Blueridge codes

99 codes. Type to filter the list.

CodeMeaningTypeFix
E1BMKH series (Gree-built): High pressure protection
BMY / BMX S-series (Midea table, classic codes): Communication error between indoor and outdoor units
VariesDIY checks
E2BMKH series (Gree-built): Indoor anti-freeze protection
BMY / BMX S-series (Midea table, classic codes): Zero-crossing signal detection error
VariesDIY
E3BMKH series (Gree-built): Low pressure protection (refrigerant shortage or blockage)
BMY / BMX S-series (Midea table, classic codes): Indoor fan speed out of control (indoor fan motor fault)
VariesDIY checks
E4BMKH series (Gree-built): Compressor discharge temperature too high
BMY / BMX S-series (Midea table, classic codes): Indoor room temperature sensor (T1) open or short circuit
VariesDIY checks
E5BMKH series (Gree-built): Over-current protection
BMY / BMX S-series (Midea table, classic codes): Evaporator coil temperature sensor (T2) open or short circuit
VariesDIY checks
E6Communication error between indoor and outdoor unitsFaultDIY checks
E7Mode conflict (multi-zone)ProtectionDIY
E8High temperature protection (overheating)ProtectionDIY checks
E9Indoor unit water-full (drain) protectionProtectionDIY
EEEEPROM (memory) error on a control boardFaultTechnician
FoRefrigerant recovery (pump-down) modeStatusDIY
F0BMKH series (Gree-built): Refrigerant shortage or system blockage detected
BMY / BMX S-series (Midea table, classic codes): Overload current protection (compressor over-current)
VariesDIY checks
F1BMKH series (Gree-built): Indoor ambient (room) temperature sensor fault (open or short circuit)
BMY / BMX S-series (Midea table, classic codes): Outdoor ambient temperature sensor (T4) open or short circuit
FaultDIY checks
F2BMKH series (Gree-built): Indoor evaporator coil temperature sensor fault (open or short circuit)
BMY / BMX S-series (Midea table, classic codes): Condenser coil temperature sensor (T3) open or short circuit
FaultDIY checks
F3BMKH series (Gree-built): Outdoor ambient temperature sensor fault (open or short circuit)
BMY / BMX S-series (Midea table, classic codes): Compressor discharge temperature sensor (TP) open or short circuit
FaultDIY checks
F4BMKH series (Gree-built): Outdoor condenser coil (middle) temperature sensor fault (open or short circuit)
BMY / BMX S-series (Midea table, classic codes): Outdoor unit EEPROM parameter error
FaultDIY checks
F5BMKH series (Gree-built): Compressor discharge temperature sensor fault (open or short circuit)
BMY / BMX S-series (Midea table, classic codes): Outdoor fan speed out of control (outdoor fan motor fault)
FaultDIY checks
F6Overload frequency limiting (protection)ProtectionDIY
F8Over-current frequency limiting (protection)ProtectionDIY
F9High discharge temperature frequency limiting (protection)ProtectionDIY
FHAnti-freeze frequency limiting (protection)ProtectionDIY
H1Defrost cycle runningStatusDIY
H3Compressor overload protectionProtectionDIY checks
H4System overload protectionProtectionDIY checks
H5IPM (inverter module) protectionProtectionTechnician
H6Indoor fan motor not running (no feedback)FaultDIY checks
H7Compressor desynchronization (loss of sync)ProtectionTechnician
HCPFC (power factor correction) protectionProtectionTechnician
U7Four-way (reversing) valve faultFaultTechnician
U8Indoor fan (PG motor) zero-crossing detection errorFaultDIY checks
C5Jumper cap malfunction (missing or wrong jumper)FaultDIY checks
PHDC bus high voltage (over-voltage) protectionProtectionDIY checks
PLDC bus low voltage (under-voltage) protectionProtectionDIY checks
LcCompressor start failureProtectionTechnician
LdCompressor phase loss or phase sequence errorProtectionTechnician
LECompressor stall (locked rotor)ProtectionTechnician
LPIndoor and outdoor unit mismatchFaultDIY checks
oEOutdoor unit fault (see outdoor board)FaultTechnician
U5Whole-unit current detection errorFaultTechnician
F7Oil return cycle (cooling)StatusDIY
LAOutdoor DC fan motor errorFaultDIY checks
LFCompressor over-speed protectionProtectionTechnician
P0BMKH series (Gree-built): IPM reset (drive module restarted)
BMY / BMX S-series (Midea table, classic codes): Inverter module (IPM) malfunction
ProtectionTechnician
P5BMKH series (Gree-built): Compressor current protection
BMY / BMX S-series (Midea table, classic codes): Mode conflict (multi-zone)
ProtectionTechnician
P6BMKH series (Gree-built): Communication error between inverter drive and main controller
BMY / BMX S-series (Midea table, classic codes): Outdoor low pressure protection
VariesTechnician
P7Inverter heat sink temperature sensor errorFaultDIY checks
P8Inverter heat sink (radiator) overheat protectionProtectionDIY checks
P9AC contactor protectionProtectionTechnician
PcCurrent sensor errorFaultTechnician
PdSensor connection protectionFaultTechnician
PETemperature drift protectionProtectionTechnician
PFDrive board ambient temperature sensor errorFaultDIY checks
PAAC current protectionProtectionDIY checks
PUCharging circuit errorFaultTechnician
PPAC input voltage anomalyProtectionDIY checks
E0Indoor unit EEPROM parameter errorFaultDIY checks
ECRefrigerant leak detected (low refrigerant charge)FaultDIY checks
EBCommunication error between indoor main board and display boardFaultDIY checks
EFIntelligent eye (occupancy sensor) module errorFaultDIY
P1Over-voltage or under-voltage protectionProtectionDIY checks
P2High temperature protection (compressor top or inverter module)ProtectionDIY checks
P3Outdoor temperature too low protection (heating lockout)ProtectionDIY
P4Inverter compressor drive errorProtectionTechnician
dFDefrost cycle runningStatusDIY
CLFilter cleaning reminderStatusDIY
APWi-Fi pairing (access point) modeStatusDIY
EH 00Indoor unit EEPROM parameter errorFaultDIY checks
EL 01Communication error between indoor and outdoor unitsFaultDIY checks
EH 02Zero-crossing signal detection errorFaultDIY checks
EH 03Indoor fan speed out of controlFaultDIY checks
EH 60Indoor room temperature sensor (T1) open or short circuitFaultDIY checks
EH 61Evaporator coil temperature sensor (T2) open or short circuitFaultDIY checks
EL 0CRefrigerant leak detected (low charge)FaultDIY checks
EH 0AIndoor unit EEPROM parameter errorFaultDIY checks
EH 0bCommunication error between indoor main board and display boardFaultDIY checks
EC 51Outdoor unit EEPROM parameter errorFaultTechnician
EC 52Condenser coil temperature sensor (T3) open or short circuitFaultDIY checks
EC 53Outdoor ambient temperature sensor (T4) open or short circuitFaultDIY checks
EC 54Compressor discharge temperature sensor (TP) open or short circuitFaultDIY checks
EC 56Coil outlet temperature sensor (T2B) open or short circuitFaultDIY checks
EC 07Outdoor fan speed out of controlFaultDIY checks
PC 00Inverter module (IPM) malfunctionProtectionTechnician
PC 01Over-voltage or under-voltage protectionProtectionDIY checks
PC 02Compressor top temperature (overload) protectionProtectionDIY checks
PC 03Pressure protection (high or low pressure switch)ProtectionDIY checks
PC 04Inverter compressor drive errorProtectionTechnician
PC 08Outdoor over-current protectionProtectionDIY checks
PC 0ACondenser high temperature protectionProtectionDIY checks
PC 0FPFC module malfunctionProtectionTechnician
PC 40Communication error between outdoor main board and inverter boardFaultTechnician
PC 43Compressor missing phase (lack of phase) protectionProtectionTechnician
PC 44Compressor zero-speed protectionProtectionTechnician
PC 46Compressor speed out of controlProtectionTechnician
PC 49Compressor over-current (phase current) protectionProtectionTechnician
FPLow-temperature heating hold (46°F freeze-protection mode)StatusDIY
FCForced cooling test modeStatusDIY
LLRemote or wired controller lockedStatusDIY
cFAnti-cold-air (heating warm-up)StatusDIY
CPRemote on/off contact openStatusDIY

How Blueridge shows error codes

BMKH series (Gree-built): The code shows on the indoor unit's display in place of the temperature. If the display is off, press the Light button on the remote. Some models also count out the code as indicator blinks. E codes are system protections and faults, F codes are mostly sensor faults, H codes are outdoor and compressor protections, U codes are motor and valve faults, and P codes are power-supply faults.

BMY / BMX S-series (Midea table, classic codes): The code appears on the indoor unit's LED display in place of the set temperature. Some models also blink the indicator lamps in a pattern that matches the code. E codes are faults in the indoor unit or its communication link, F codes are faults on the outdoor side, and P codes are protections: the outdoor unit has stopped itself to prevent damage. EC is the refrigerant leak check.

BMY / BMX S-series (Midea table, four-character codes): The display shows a two-letter prefix and a two-character suffix, either together (EH60) or alternating (EH, then 60). Write both parts down; the suffix is what identifies the fault. EH and EL are indoor-side faults, EC is an outdoor-side fault, and PC is an outdoor protection: the unit stopped itself to prevent damage.

Brands built on the same platform

These brands share a code table with Blueridge because the same factory builds them, so their pages describe the same faults: ACiQ, AirEase, Arcoaire, Arctic King, Armstrong Air, Bosch, Bryant, Carrier, Comfortmaker, Concord, Cooper & Hunter, Day & Night, Della, Ducane.

Sources

  • Blueridge Installation and Owner's Manual (BMKH, 11/2016 and 01/2017 editions), Diagnostic Codes
  • Blueridge BMKH Floor-Ceiling User and Install Manual (12/2023), error code table
  • Blueridge BMY19 Series Owner's Manual and DIY Single Zone Installation Manual (2020), Midea document CS78421-548-754 (same manual family as Pioneer WYT)

Updated September 2026. Manufacturer site: www.alpinehomeair.com