Operation Control - Panasonic CU-B14DBE5 Service Manual

9.6.

Operation Control

9.6.1. Odour Cut Control
• Odour cut operation removes the odour generated at indoor heat exchanger by using drain water come out from indoor heat
exchanger.
• Press "Odour" button at remote control to enable odour cut operation.
• Odour cut operation starts when compressor or thermostat is on.
Thermostat & Compres-
sor ON/OFF
Time
Cooling
Soft Dry
9.6.2. Energy Saving
• During Operation, press "Economy" button at remote control to enable Energy Saving Operation.
• The air conditioner judges the stable condition, where the different between indoor suction temperature and setting temperature
is 1°C for 30 minutes and moderately shifts the set temperature in 0.5°C steps (Maximum 2°C) to control energy saving opera-
tion.
• If temperature different is out of range, energy save operation will not start.
• Energy Save Operation is canceled by pressing the "Economy" button again.
9.6.3. Dew Form Prevention Control
• During Cooling or Soft Dry operation, if outdoor temperature is less than 30°C, and indoor fan speed is low or auto setting, indoor
heat exchanger temperature become lower, dew form prevention control start to prevention dew form at indoor discharge grille.
• When indoor pipe temperature decrease, the cooling capacity will be reduced and the louver angle will be fixed at certain angle.
9.6.4. Freeze Prevention Control
• After compressor starts operation for 4 minutes, the outdoor unit will stop its operation if indoor pipe temperature falls below 0°C
for 6 minutes.
• After 3 minutes stops, compressor restarts operation if indoor pipe temperature is 6°C or more.
• This phenomenon is to protect the indoor heat exchanger from freezing and to prevent higher volume of refrigerant in liquid from
returning to the compressor.
9.6.5. Time Delay Safe Control
• The compressor will not start for three minutes after stop of operation.
9.6.6. Outdoor Fan Remaining Heat Removal Control
• When compressor stop, outdoor fan operates at High speed for 1 minute to remove the remaining heat.
Thermostat &
Compressor ON
40 sec. 50 sec. -
Off Lo Normal
Operation
Off Lo Lo
Energy save control time chart
Thermostat &
Compressor OFF
20 sec. 120 sec. 20 sec.
Lo Off Lo
Lo Off Lo
27
Thermostat &
Compressor ON
40 sec. 50 sec. -
Off Lo Normal
Operation
Off Lo Lo