- General Pioneer Mini Split Error Codes List
- Pioneer Diamante Series Mini Split Error Codes List
- Pioneer Quantum Series Mini Split Error Codes List
- Common Causes and Fixes for Pioneer Mini Split Units
If you have a Pioneer mini split that is giving an error code, the list below gives the error meaning.
The Pioneer mini split error code list will give general information on what problem the unit is having.
Also below are common causes and fixes when a Pioneer mini split has an error.
General Pioneer Mini Split Error Codes List
- E0: Indoor unit EEPROM parameter error
- E1: Indoor/Outdoor units communication error
- E2: Zero-crossing signal detection error
- E3: Indoor fan Speed has been out of control
- E4: Indoor room temperature sensor T1 open circuit or short circuit
- E5: Evaporator coil temperature sensor T2 open circuit or short circuit
- EC: Refrigerant leakage detection
- F0: Current overload protection
- F1: Outdoor ambient temperature sensor T4 open circuit or short circuit
- F2: Condenser coil temperature sensor T3 open circuit or short circuit
- F3: Compressor discharge temperature sensor TP open circuit or short circuit
- F4: Outdoor unit EEPROM parameter error
- F5: Outdoor fan speed has been out of control
- P0: IPM malfunction or IGBT over strong current protection
- P1: Over voltage or over low voltage protection
- P2: High temperature protection of IPM module or compressor top
- P3: Outdoor ambient temperature too low
- P4: Inverter compressor drive error
- P5: Indoor units mode conflict (multi-zone only)
- P6: Low pressure protection (Only for 36K)
Pioneer Diamante Series Mini Split Error Codes List
- EH 00 : Indoor unit EEPROM error
- EH 0A : Indoor unit EEPROM parameter error
- EL 01 : Communication error between indoor unit and outdoor units
- EH 03 : Indoor fan speed error (DC motor)
- EH 60 : Indoor room temperature sensor error (T1)
- EH 61 : Indoor coil temperature sensor error (T2)
- EL 0C : Refrigerant leakage detection (Cooling mode only)
- PC 08 : Outdoor current overload protection
- EC 53 : Outdoor ambient temperature sensor error (T4)
- EC 52 : Outdoor coil temperature sensor error (T3)
- EC 54 : Compressor discharge temperature sensor error (T5)
- EC 51 : Outdoor unit EEPROM error
- EC 07 : Outdoor unit fan speed error (DC fan motor)
- PC 00 : Inverter module IPM error
- PC 01 : High or Low voltage protection
- PC 0L : Outdoor low ambient temperature protection
- PC 04 : Compressor drive error
- EH 0b : Communication error between main control board and display board
Pioneer Quantum Series Mini Split Error Codes List
- E2 : IDU Coil temperature sensor failure.
- E3 : ODU Coil temperature sensor failure. (OPT) ODU coil sensor and ODU PCB
- E4 : AC Cooling system abnormal
- E5 : IDU/ODU mismatched failure
- E6 : IDU PG Fan motor / DC fan motor works abnormal（IDU failure）
- E7 : ODU Ambient Temperature sensor failure ODU ambient sensor and ODU PCB.
- E8 : ODU Discharge Temperature sensor failure. ODU discharge sensor and ODU PCB.
- E9 : IPM/Compressor driving control abnormal. ODU PCB , compressor, etc.
- EA : ODU Current Test circuit failure ODU PCB broken?
- Eb : The Communication abnormal of Main PCB and Display board
- EE : ODU EEPROM failure.
- EF : ODU DC fan motor failure.
- EU : ODU Voltage test circuit abnormal.
- P0 : IPM module protection. ODU PCB
- P1 : Over/under voltage protection.
- P2 : Over current protection.
- P4 : ODU Discharge pipe Over temperature protection.
- P5 : Sub-cooling protection on Cooling mode.
- P6 : Overheating protection on Cooling mode.
- P7 : Overheating protection on Heating mode.
- P8 : Outdoor Over temperature/Under temperature protection.
- P9 : Compressor driving protection (Load abnormal).
- PA : Multi-split conflict code (one indoor unit tries to heat while another tries to cool)
- F0 : Infrared Customer feeling test sensor failure.
- F1 : Electric Power test module failure.
- F2 : Discharge temperature sensor failure. PROTECTION.
- F3 : ODU coil temperature failure PROTECTION.
- F4 : Cooling system gas flow abnormal PROTECTION.
- F5 : PFC PROTECTION Please check the troubleshooting for detail.
- F6 : The Compressor lack of phase / Anti-phase PROTECTION.
- F7 : IPM Module temperature PROTECTION Please check the troubleshooting for detail.
- F8 : 4-Way Value reversing abnormal.. Please check the troubleshooting for detail.
- F9 : The module temperature test circuit failure. ODU PCB
- FA : The compressor Phase-current test circuit failure.
- Fb : Limiting/Reducing frequency for Over load protection on Cooling/Heating mode.
- FC : Limiting/Reducing frequency for High power consumption protection.
- FE : Limiting/Reducing frequency for Module current protection ( phase current of compressor).
- FF : Limiting/Reducing frequency for Module temperature protection.
- FH : Limiting/Reducing frequency for Compressor driving protection.
- FP : Limiting/Reducing frequency for anti- condensation protection.
- FU : Limiting/Reducing frequency for anti-frost protection.
- Fj : Limiting/Reducing frequency for Discharge over temperature protection.
- Fn : Limiting/Reducing frequency for ODU AC Current protection.
- Fy : Gas leakage protection Please check the troubleshooting for detail.
- Bf : TVOC sensor failure（IDU failure, optional）
- bc : PM2.5 sensor failure（IDU failure, optional）
- bj : Humidity sensor failure. （IDU failure）
Common Causes and Fixes for Pioneer Mini Split Units
- Power Cycle the Unit
- Bad Communication Wire or Connection
- Refrigerant Low
- Condensing Fan Motor
- Computer Board Bad Connection or Failure
Let the unit sit for 3-5 minutes with no power, then turn the breaker/disconnect back on and the power back on the unit.
Often when an error occurs, it simply needs to be power cycled to clear.
If the error comes back, then more troubleshooting will need to be done.
This is mainly with the communication lines that run between the inside and outside units.
The wires will be labeled inside the front panel on the inside unit and next to the power on the outside unit.
Check all the connections on the communication wires and check for any breaks often can solve issues.
An HVAC technician will use multi meter to check for continuity on each line, making sure there are no opens or shorts.
If there is a leak, the refrigerant will become low, and the unit will stop working.
Often when the refrigerant is low, the inside condenser will start to drip water.
A common error for a Pioneer mini split with low refrigerant is an EC error code, but other codes can also display, or in some cases, none will display.
If the system is low on refrigerant, the leak will need to be found, and refrigerant added back into the system.
A common failure point for leaks is the flares where the copper line set is bolted together.
The flares that come from the manufacturer notoriously cause issues and can leak sometimes.
If it fails and stops working, it will cause issues.
Check around the fan that no debris has blown into the outside unit and has stopped the fan from turning.
If debris stops the fan from spinning, it will cause an issue and need to be cleaned out.
The motor may also have gone bad or have a wiring issue.
One of the computer boards may have malfunctioned.
The connections between the boards can all be pushed in to see if any have become loose.
The onboard computer chips EEPROM and others can also be pushed in to be sure they are connected well.
The boards can also go bad and need to be replaced.
A board can go bad from a power spike or a bad wiring connection.
If your Pioneer mini split is giving an error code, use the chart above to see what the problem is with the unit.
For example, if the unit is displaying an E0 error code, the unit is having a problem with the indoor unit EEPROM parameter.
Once the error is known, try a power reset to see if the error clears.
When doing a power reset, it is best to pull the disconnect or turn off the breaker and wait a few minutes.
The communication lines between the units are a common failure and should be checked for any bad connections.
Other common issues include low refrigerant, condensing fan motor, and computer board problems.
Have you had an issue with a code on your Pioneer mini split? Let us know your thoughts below.