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Michael ReeseSep 18, 2025
Why is there a flowing sound during Panasonic Heat Pump operation?
- NNicholas PerrySep 19, 2025
The flowing sound is due to refrigerant flow inside the unit.
Why is there a flowing sound during Panasonic Heat Pump operation?
The flowing sound is due to refrigerant flow inside the unit.
Why my Panasonic Heat Pump system cannot get warm instantly?
Due to the nature of the heatpump system, it may take some time to heat-up the water if the unit is operated from cold-start.
What causes total running current protection in a Panasonic WH-MDF09C3E8 Heat Pump?
If your Panasonic Heat Pump is experiencing total running current protection, it may be due to excess refrigerant. You should check the outdoor PCB.
What to check if my Panasonic WH-MDF09C3E8 shows indoor heat exchanger freeze prevention?
If your Panasonic Heat Pump is showing indoor heat exchanger freeze prevention, check the indoor heat exchanger and ensure there is no refrigerant shortage.
Why is Panasonic WH-MDF09C3E8 operation delayed a few minutes after restart?
The delay is a protection to the unit’s compressor.
Why does my Panasonic Mono bloc unit emit steam during heating mode?
This is due to defrost operation happens at the heat exchanger.
What to do if my Panasonic WH-MDF09C3E8 displays an indoor water outlet temperature sensor abnormality?
If your Panasonic Heat Pump shows an indoor water outlet temperature sensor abnormality, you should check the water outlet temperature sensor.
How to troubleshoot PFC control problems in a Panasonic Heat Pump?
If your Panasonic Heat Pump is experiencing PFC control issues, check the voltage at PFC.
What to do if my Panasonic Heat Pump is showing a back-up heater OLP abnormality?
If your Panasonic Heat Pump displays a back-up heater OLP abnormality, you should check the back-up heater OLP. This may continue for 60 seconds.
What to do if my Panasonic WH-MDF09C3E8 displays an outdoor heat exchanger temperature sensor abnormality?
If your Panasonic Heat Pump is showing an outdoor heat exchanger temperature sensor abnormality, you should check the outdoor heat exchanger temperature sensor.
| Category | Heat Pump |
|---|---|
| Model | WH-MDF09C3E8 |
| Refrigerant | R32 |
| Cooling Capacity | 2.5 kW |
| Operating Temperature Range (Cooling) | -10 ~ +43 °C |
| Operating Temperature Range (Heating) | -15°C to 24°C |












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