Panasonic 26PEK2U6 26PEK2U6 Service Manual - Page 214
Defrost control, Defrost end conditions
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Defrost control Defrost control Defrost sequence Heating operation (25-minute mask) 1 Frost detection 2. Processes and functions Defrost start (reverse cycle defrost) • Operating frequency: 61.8 Hz Defrost in progress • Outdoor unit fan: OFF • Electronic control valve: step 300 • 4-way valve: OFF 2 Defrost cancel • Indoor unit fan: OFF 3 Start-up operation (1) Frost detection 1. Outdoor heat exchanger temperature (C1) method (15-minute mask after operation start) 2 2. Outdoor air temperature is 7°F or above and outdoor heat exchanger temperature (C1) of 0°F or below is detected continuously for 20 seconds. 3. Outdoor air temperature is below 7°F and outdoor heat exchanger temperature (C1) of below (outdoor air temperature -10°F) is detected continuously for 20 seconds. (2) Defrost cancel • Defrost end conditions 1. Outdoor heat exchanger temperature (C1) rises to 54°F or higher. 2. Outdoor heat exchanger temperature is 45°F or higher continuously for 1 minute. 3. Defrost time of 10 minutes has elapsed. (3) Startup operation After defrost ends, the compressors and outdoor unit fan stop for approximately 40 seconds, then operation begins in heating mode. 2-8