Panasonic CS-F28DB4E5 [32/112] Valve error

Panasonic CS-F28DB4E5 [32/112] Valve error
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
15°C
Compressor discharge temperature
15°C
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.
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CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5

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