Defrost Control - Panasonic CS-F50DTE5 Service Manual

CS-F50DTE5 CU-L50DBE8
Fan speed auto
• • • • When operation start, or during operation, fan speed control by detecting indoor heat exchanger as follows:
• • • • (K10 = Indoor heat exchanger temperature, depend on indoor type)
9.4.2. Hot start control
• • • • When heating operation start, hot start control carry out.
• • • • During hot start operation, [PREHEAT] displayed at the wired remote controller.
• • • • For wireless remote controller, [POWER LED] is blinking at the receiver of indoor unit. Indoor fan stop and louver angle fixed
to upper side in spite of any setting of remote controller. When indoor heat exchanger temperature increase, or 4 minute past
after operation start, hot start control finish and shift to normal fan control.
9.4.3. Heating indoor fan control at thermostat off heating mode operation
• • • • During heating operation, if thermostat is off, indoor fan fixed low speed, Louver angle fixed upper side, even if remote control
display shows any angle.
(cassette and ceiling model only)
9.4.4. Heating powerful operation
• • • • When heating mode operation start, temperature differences between setting temperature and room temperature is more than
5 K, setting temperature increase 2 K and operation start.
(however, setting temperature after shifting is more than 31°C, setting temperature fixed 31°C.)
• • • • Due to this control, micro computer judge indoor heat loss is big and increase compressor frequency compare to normal
condition, then heat up indoor room quickly.
• • • • This control will be finished after 60 min or thermostat is off.
9.4.5.

Defrost control

• • • • During heating operation at outdoor low temperature condition, defrost operation start timely to melt the ice formed on outdoor
heat exchanger.
• • • • When heating operation accumulated time is time up, and both outdoor temperature and outdoor unit heat exchanger
temperature is less than setting temperature for 5 minute. When defrost temperature is more than setting temperature, defrost
operation finish.
• • • • During defrost operation, in spite of any change of remote controller, indoor fan stop and louver angle fixed at upper side.
(for louver control : cassette and ceiling model only)
• • • • During defrost operation, [DEFROST] is displayed at wired remote controller (when using wireless controller, POWER LED is
blinking in receiver of indoor unit), hot start operate after defrost operation finish.
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