OLMO Air Conditioner Error Codes on a mini split usually indicates a Refrigerant Leakage Detection Error. This means the system has detected a leak. While there may be a leak in the unit, keep in mind sensors, and boards also can malfunction.
OLMO Air Conditioner Error Code Solutions
Scandic and Tropic Series
When below list for identification of error code occurs, please turn off air conditioner and disconnect power, and then contact the qualified professionals for service.
| Error Code | Troubleshooting |
|---|---|
| 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 |
| F1 | Outdoor temperature sensor T4 open circuit or short circuit |
| F2 | Condenser coil temperature sensor T3 open circuit or short circuit |
| F3 | Compressor discharge temperature sensor T5 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 compressor top diagnosis and solution |
| P4 | Inverter compressor drive error |
Before calling for service, review this list. It may save your time and expense. This list includes common occurrences that are not the result of defective workman-ship or materials in this appliance.
| Problem | Solution |
|---|---|
| Air conditioner does not start | Wall plug disconnected. Push plug firmly into wall outlet. |
| House fuse blown or circuit breaker tripped. Replace fuse with time delay type or reset circuit breaker. | |
| Plug Current Device Tripped. Press the RESET button. | |
| Power is OFF. Turn power ON. | |
| Air from unit does not feel cold enough | Room temperature below 62 F(17 C ). Cooling may not occur until room temperature O O rises above 62 F(17 C). |
| Temperature sensing behind air filter element touching cold coil. Keep it from the cold coil. | |
| Set to a Lower temperature. | |
| Compressor stopped when changing modes. Wait for 3 minutes after set to the COOL mode. | |
| Air conditioner cooling, but room is too warm- ice forming on cooling coil behind decorative front. | Outdoor temperature below 64 F(18 C). To defrost the coil, set FAN ONLY mode. |
| Air filter may be dirty. Clean filter. Refer to Care and Cleaning section. To defrost, set to FAN ONLY mode. | |
| Thermostat set too cold for night-time cooling. To defrost the coil, set to FAN ONLY mode. Then, set temperature to a Higher setting. | |
| Air conditioner cooling, but room is too warm- NO ice forming on cooling coil behind decorative front. | Dirty air filter- air restricted. Clean air filter. Refer to Care and Cleaning section. |
| Temperature is set too High, set temperature to a Lower setting. | |
| Air directional louvers positioned improperly. Position louvers for better air distribution. | |
| Front of units is blocked by drapes, blinds, furniture, etc. – restricts air distribution. Clear blockage in front of unit. | |
| Doors, windows, registers, etc. Open- cold air escapes. Close doors, windows, registers. | |
| Unit recently turned on in hot room. Allow additional time to remove Stored heat from walls, ceiling, floor and furniture. | |
| Air conditioner turns on and off rapidly | Dirty air filter- air restricted. Clean air filter. |
| Outside temperature extremely hot. Set FAN speed to a Higher setting to bring air past cooling coils more frequently | |
| Noise when unit is cooling | Air movement sound. This is normal . If too loud, set to a slower FAN setting |
| Window vibration – poor installation. Refer to installation instructions or check with installer. | |
| Water dripping INSIDE when unit is cooling. | Improper installation. Tilt air conditioner slightly to the outside to allow water drainage. Refer to installation instructions – check with installer. |
| Water dripping OUTSIDE when unit is cooling. | Unit removing large quantity of moisture from humid room. This is normal during excessively humid days. |
| Remote Sensing Deactivating Prematurely (some models) | Remote control not located within range. Place remote control within 20 feet & 180 , radius of the front of the unit. |
| Remote control signal obstructed. Remove obstruction. | |
| Room too cold | Set temperature too low. Increase set temperature. |
Diagnosis and Solution
EEPROM parameter error diagnosis and solution (E0/F4)
Malfunction decision conditions: Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip.
Supposed causes:
- Installation mistake
- PCB faulty
Indoor / outdoor unit’s communication diagnosis and solution (E1)
Malfunction decision conditions: Indoor unit does not receive the feedback from outdoor unit during 110 seconds and this condition happens four times continuously.
Supposed causes:
- Wiring mistake
- Indoor or outdoor PCB faulty
Zero crossing detection error diagnosis and solution (E2)
Malfunction decision conditions: When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal.
Supposed causes:
- Connection mistake
- PCB faulty
Fan speed has been out of control diagnosis and solution (E3)
Malfunction decision conditions: When indoor fan speed keeps too low (300RPM) for certain time, the unit will stop and the LED will display the failure.
Supposed causes:
- Wiring mistake
- Fan ass’y faulty
- Fan motor faulty
- PCB faulty
Open circuit or short circuit of temperature sensor diagnosis and solution (E5)
Malfunction decision conditions: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure.
Supposed causes:
- Wiring mistake
- Sensor faulty
Refrigerant Leakage Detection diagnosis and solution (EC)
Malfunction decision conditions: Define the evaporator coil temp.T2 of the compressor just starts running as Tcool. In the beginning 5 minutes after the compressor starts up, if T2 < Tcool 28.4o F(－2o C) does not keep continuous 4 seconds and this situation happens 3 times, the display area will show “EC” and AC will turn off.
Supposed causes:
- T2 sensor faulty
- Indoor PCB faulty
- System problems, such as leakage or blocking.
IPM malfunction or IGBT over-strong current protection diagnosis and solution (P0)
Malfunction decision conditions: When the voltage signal that IPM send to compressor drive chip is abnormal, the display LED will show “P0” and AC will turn off.
Supposed causes: Wiring mistake; IPM malfunction; Outdoor fan ass’y faulty Compressor malfunction; Outdoor PCB faulty
Over voltage or too low voltage protection diagnosis and solution (P1)
Malfunction decision conditions: An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit.
Supposed causes:
- Power supply problems.
- System leakage or block
High temperature protection of compressor top diagnosis and solution (P2)
Malfunction decision conditions: If the sampling voltage is not 5V, the LED will display the failure.
Supposed causes:
- Power supply problems.
- System leakage or block
Inverter compressor drive error diagnosis and solution (P4)
Malfunction decision conditions: An abnormal inverter compressor drive is detected by a special detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on.
Supposed causes: Wiring mistake; IPM malfunction; Outdoor fan ass’y faulty Compressor malfunction; Outdoor PCB faulty
My indoor unit is reading f3 code error.
My model is OLMO
os-12 hp220v2tg