Operation Control (Cu-2E15Lbe And Cu-2E18Lbe); Compressor Operation Frequency; Deice Operation - Panasonic CU-2E15LBE Service Manual

11 Operation Control (CU-2E15LBE and CU-2E18LBE)

Compressor Operation Frequency

11.1.
• The compressor operation frequency is determined by room temperature, capacity, and model type.
- When operation is started after the air conditioner has been stopped for more than one hour, the air conditioner operates at a
high frequency which lowers the room temperature quickly for cooling (or raises it quickly for heating).
- If two or more indoor units are operating simultaneously, the thermostat is set to OFF in one room; the automatic expansion
valve is closed to adjust the flow of refrigerant so as to control the room temperature.
- When the thermostat is set to OFF during 1-room operation, the compressor and fan of the outdoor unit are stopped. (The
outdoor unit fan is stopped 30 seconds after the compressor stops).
- It takes about 180 seconds to restart operation when the compressor has been stopped (Time delay safety control)

11.2. Deice Operation

• During Heating operation, the deice operation judgment method:
According to outdoor heat exchanger temperature, operation time and outdoor air temperature.
• Deice operation
- The outdoor heat exchanger temperature falls below 3°C continuously for 3 minutes
- During deice operation; the 4-way valve is switched to cooling cycle to melt the frost.
- Deice operation ends about 12 minutes of operation or the temperature of heat exchanger rises above 25°C.
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