Energy Save Operation; Outdoor Fan Remaining Heat Removal Control; Crank Case Heater Control; Valve Error - Panasonic CS-F24DTE5 Service Manual

CS-F24DTE5 CU-L24DBE5 / CS-F28DTE5 CU-L28DBE5
9.7.

Energy Save Operation

• • • • During cooling operation, or heating operation, when pushing the [ECONOMY] button in the wired remote controller, energy
save operation start and [ECO] sign is displayed at LCD display panel of wired remote controller ([ECONOMY] sign is displayed
at LCD display panel of wireless remote controller).
• • • • When energy save operation start and temperature differences is +1K (=indoor suction temperature - setting temperature) for
cooling operation, or -1K for heating operation for 30 minute, thermostat OFF point shift to 0.5K.
(This means thermostat OFF point shift up +0.5K for cooling, thermostat OFF point shift down -0.5K for heating)
From this control, it is judged that indoor side heat loss is small, then reduce compressor frequency. This means energy save
operation.
• • • • Those kind of operation continue maximum 4 times. If temperature is out of range (thermostat off +1K for cooling, thermostat
off -1K for heating), operation release from energy save control. But energy save control cannot be released by pushing
ON/OFF button of remote controller, but still effective. When pushing [ECONOMY] button once again, energy save control
released.
9.8.

Outdoor Fan Remaining Heat Removal Control

• • • • When compressor stop, outdoor fan operate for 1 minute to remove the remaining heat.
9.9.

Crank Case Heater Control

• • • • Crank case heater power is on to prevent the refrigerant solving into compressor oil inside of the compressor shell at cold
condition.
• • • • When below conditions are satisfied, crank case heater power on.
− − − − Compressor stop
− − − − Outdoor temperature
− − − − Compressor discharge temperature

9.10. Valve Error

• • • • When install the air conditioner unit and try to start forced operation (cooling mode) after completion the installation, in case of
3 way valve close, valve error displayed at the wired remote controller to protect the compressor.
• • • • This error can be detected to satisfy below condition, when power is on at first time and within 7 minute from compressor start.
(However, it is judged that power on is the first time until compressor start operating continuosly for 7 minute)
− − − − Indoor heat exchanger temperature when compressor start - 3K < current indoor heat exchanger temperature for 5 minute
− − − − Indoor suction temperature - 3K < current heat exchanger temperature for 5 minute.
15°C
15°C
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