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Pioneer Air Conditioner AC Mini Split Error Codes

Pioneer AC showing error code? Error codes display on either the indoor or outdoor unit. Certain error codes mean different things. Knowing what each error code means can assist you in troubleshooting and fixing your Pioneer AC unit. Below you will find Pioneer air conditioner error codes for both the indoor and outdoor units for 9000 btu and above. We have included flowcharts for troubleshooting what part needs to be replaced, repaired, or cleaned.

Pioneer Air Conditioner Ductless Wall Mount Mini Split System Heat Pump - Error Codes And TroubleshootingPioneer Air Conditioner Ductless Wall Mount Mini Split System Heat Pump
Error Codes And Troubleshooting

Pioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System - Indoor Unit ERROR CODE chartPioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System
Indoor Unit ERROR CODE chart

 

Pioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System - Names of Indoor and Outdoor PartsPioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System
Names of Indoor and Outdoor Parts

Pioneer Air Conditioner Ductless Wall Mount Mini Split Indoor Unit Error Display Codes

Pioneer AC Ductless Wall Mount Mini Split Indoor Unit Error Code = dF
What Does The AC Error Code Mean? = In defrosting mode the LED displays dF.
The outdoor unit is in defrost mode, heat pumps will initiate defrost upon demand. It’s a normal operation code.

Pioneer AC Ductless Wall Mount Mini Split Indoor Unit Error Code = E0
What Does The AC Error Code Mean? = Indoor unit EEPROM parameter error

Pioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System - E0 or F4 error code troubleshooting

 

Pioneer AC Ductless Wall Mount Mini Split Indoor Unit Error Code = E1
What Does The AC Error Code Mean? = Indoor / outdoor units communication error

Pioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System - E1 error code troubleshooting

 

Pioneer AC Ductless Wall Mount Mini Split Indoor Unit Error Code = E2
What Does The AC Error Code Mean? = Zero-crossing signal detection error

Pioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System - E2 error code troubleshooting

 

Pioneer AC Ductless Wall Mount Mini Split Indoor Unit Error Code = E3
What Does The AC Error Code Mean? = Indoor fan speed has been out of control

Pioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System - E3 error code troubleshooting

 

Pioneer AC Ductless Wall Mount Mini Split Indoor Unit Error Code = E4
Indoor room temperature sensor T1 open circuit or short circuit

Pioneer AC Ductless Wall Mount Mini Split Indoor Unit Error Code = E5
Evaporator coil temperature sensor T2 open circuit or short circuit

Pioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System - E5 error code troubleshooting

 

Pioneer AC Ductless Wall Mount Mini Split Indoor Unit Error Code = EC
Refrigerant leakage detection

Pioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System - EC error code troubleshooting

Pioneer AC Ductless Wall Mount Mini Split Indoor Unit Error Code = F1
Outdoor temperature sensor T4 open circuit or short circuit

Pioneer AC Ductless Wall Mount Mini Split Indoor Unit Error Code = F2
Condenser coil temperature sensor T3 open circuit or short circuit

Pioneer AC Ductless Wall Mount Mini Split Indoor Unit Error Code = F3
Compressor discharge temperature sensor T5 open circuit or short circuit

Pioneer AC Ductless Wall Mount Mini Split Indoor Unit Error Code = F4
Outdoor unit EEPROM parameter error

Pioneer AC Ductless Wall Mount Mini Split Indoor Unit Error Code = P0
IPM malfunction or IGBT over-strong current protection

Pioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System - P0 error code troubleshooting

 

Pioneer AC Ductless Wall Mount Mini Split Indoor Unit Error Code = P1
Over voltage or Under voltage protection

Pioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System - P1 error code troubleshooting

Pioneer AC Ductless Wall Mount Mini Split Indoor Unit Error Code = P2
High temperature protection of compressor top

Pioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System - P2 error code troubleshooting

 

Pioneer AC Ductless Wall Mount Mini Split Indoor Unit Error Code = P4
Inverter compressor drive error

Pioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System -P4 error code troubleshooting

Pioneer AC Defrost

Defrosting of the outdoor heat exchange is controlled by the microprocessor from detection from the indoor pipe temperature sensor. Defrost control type is according to the JC on the PCB whether it is connected. According to the condition, enter the defrosting operation, the first defrosting operation time is 8 minutes; after defrosting operation for one cycle, then regulate the defrosting operation time if needed. After the compressor cumulative operation time exceeds 120 minutes and the temperature of the IPT is less than 95F for 2 minutes…

When the defrosting operation time on this condition exceeds 8 minutes, it will terminate. After the compressor operates continuously for 20 minutes and the IPT is less than 73F or from the last time of defrosting operation is 50 minutes or more interval. When the defrosting operation time on this condition exceeds 10 minutes, it will terminate.

When the JC isn’t connected on the PCB = When the conditions of a) or b) is satisfied, the defrosting operation starts. Under the heating operation, the compressor cumulative operation time exceeds 50 minutes and the temperature of the outdoor pipe temperature sensor reads lower than 14F. Under the heating operation, the compressor cumulative operation time exceeds 50 minutes, if the indoor pipe temperature sensor reads lower than 104F continuously for 2 minutes.

Pioneer AC Defrost terminating conditions

The outdoor defrost sensor reads 68F the defrosting operation will terminate.
The defrosting time exceeds 10 minutes the defrosting operation will terminate.

Model Names of Pioneer AC Indoor/Outdoor units

(NOTE: THESE MODEL NUMBER ARE FOR THE ERROR CODES ABOVE)
Cooling Only Model Numbers (Indoor + Outdoor Units):

WAE009AMFI15RL (WE009AMFI15CLD + AN009AMFI15RPD)
WAE012AMFI15RL (WE012AMFI15CLD + AN012AMFI15RPD)
WAE012GMFI15RL (WE012GMFI15CLD + AN012GMFI15RP)
WAE018GMFI15RL (WE018GMFI15CLD + AN018GMFI15RPD)
WAE024GMFI15RL (WE024GMFI15CLD + AN024GMFI15RPD)

Heat Pump Model Numbers (Indoor + Outdoor Units):
WYE009AMFI15RL (WE009AMFI15HLD + YN009AMFI15RPD)
WYE009GMFI15RL (WE009GMFI15HLD + YN009GMFI15RPD)
WYE012AMFI15RL (WE012AMFI15HLD + YN012AMFI15RPD)
WYE012GMFI15RL (WE012GMFI15HLD + YN012GMFI15RPD)
WYE018GMFI15RL (WE018GMFI15HLD + YN018GMFI15RPD)
WYE024GMFI15RL (WE024GMFI15HLD + YN024GMFI15RPD)

Pioneer Air Conditioner Ductless Wall Mount Mini Split System Heat Pump - Outdoor Unit Error Display Codes and LED LightsPioneer Air Conditioner Ductless Wall Mount Mini Split System Heat Pump
Outdoor Unit Error Display Codes and LED Lights

 

Pioneer Air Conditioner Ductless Wall Mount Mini Split System Heat Pump - Outdoor Unit Error Display

 

Pioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System - Outdoor Wiring Diagram

 

Pioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System - Indoor Wiring Diagram

 

Pioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System - Cooling Models Refrigerant Cycle Diagram

 

Pioneer Air Conditioner Inverter Ductless Wall Mount Mini Split System - Heat Pump Models Cycle Diagram

 

 

Pioneer Split System AC

Pioneer mini split tech support = 1-877-757-8284

 

Pioneer Air Conditioner Original Remote Control Button DescriptionPioneer Air Conditioner Original Remote Control Button Description


Universal Pioneer mini split remote control
Universal Pioneer mini split remote control
Works with PIONEER AC

 

Decorative PVC Line Cover Kit for Mini Split Air Conditioners and Heat PumpsDecorative PVC Line Cover Kit for Mini Split Air Conditioners and Heat Pumps

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16 thoughts on “Pioneer Air Conditioner AC Mini Split Error Codes”

  1. Appliance Repair Assistant

    Kirk,

    It seems as if your Pioneer Inverter is displaying error codes OC and EL.
    These codes typically indicate issues with the outdoor unit and the communication between the indoor and outdoor units.

    OC: Outdoor unit malfunction, usually related to the compressor or fan motor.
    EL: Communication error between the indoor and outdoor units.
    -RR

  2. kirk kimball
    My Pioneer Inverter stopped working and is flashing O C , E L.
    I can not find what codes mean.

  3. Our pioneer indoor AC unit just started showing the Fy Error Code.
    No airflow.
    Was working great before.
    Can’t find that code anywhere.

  4. Our new (to us) home has a Pioneer mini split installed in the master bedroom. I checked to see if it had the WIFI dongle installed or if I should buy one and it turns out there is no USB port. There is a small card hardwired to the main board and placed where the USB port ‘should’ be. There are a couple lights on the card which blink occasionally which leads me to believe this might be a hardwired version of the dongle. There are a couple random WIFI networks which show up when the unit is in AP mode, one is locked and the other isn’t. The ‘12345678’ password doesn’t work on the locked network and the unlocked one gets me nowhere with the Pioneer Airlink or NetHome Plus apps. None of the auto-discovery options in the apps find the unit either… Please Help!!!

  5. Kristoforos Kafalias

    Just installed a 9000 btu 115v mini split. Outside unit fan is on but the condenser isn’t kicking on. Inside unit is on and function – no error codes. Checked the voltage on the poles outside – 120v. Not sure if this is a refrigerant issue or if there’s an actual issue with the compressor pcb.

  6. Just installed a Pioneer YN048 with a UB048. Powered everything up and all I get is 2 rapid flashes on the operation lamp every 3-4 seconds

  7. I have pioneer 12000 BTU it’s over a year , it’s display error code F5 . I had replace main PCB and out side, inside fan motor, now it’s display P4. I need some help, can everyone help? Thank you

  8. I have a Pioneer WS030GMFI17HLD and it is showing error code F0. It will not cool or heat. Does anyone know what this error code is?

  9. Dear, Sir/Madam
    Anyone knows the exact resistance value of the 3 thermistor sensor of outdoor unit ( pioneer split type inverter 24,000 BTU, Outdoor model : AN024GMF117RPD.

    Thanks A lot..

  10. I have YN018GMFI16M2D-V2 Pioneer dual mini split. The unit powers up and runs until the compressor kicks on. Then I get an E4 error on the outside unit and E5 error on BOTH inside units. I have checked or replaced all thermistors. No change. Unit worked fine for 2 years. Any thoughts?

  11. Steven Petersheim

    I just purchased the 12,000 btu unit in August.
    The indoor blower quite working on heat mode. (It works in all other modes) there are no codes on the display. Just shows the temp that it is set for but fan doesn’t run. (everything else seems to be functioning normally). Any idea what’s going on?
    Thanks!

  12. I have purchased and installed several of these units, the last 2 have been pioneer 18k heat pumps, I just installed another, and there are no error codes, but the condenser will not run, fan or compressor, all wiring is fine, voltage is good, can anyone tell me what is wrong

  13. Venessa Gaitan

    PIONEER Air Conditioner Inverter+ Ductless Wall Mount Mini Split System Air Conditioner & Heat Pump Full Set, 9000 BTU 115V

    The unit will not turn on there is no error code. Just stopped working. Lost the manual already changed the fuses on the box outside where the power is being ran from.

  14. We have a Pioneer inverter indoor model WS009GMF122HLD. Several times, it’s displayed the E1 error code, but it functions again after the power has been switched off for a few seconds and then back on. Today, it stopped responding to the remote control. No error message was displayed, but we were unable to turn the unit off or change the mode or temperature setting. We have other units, and the remote worked with them, so we believe the problem is with the inverter. Can you help? Thank you!

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