Panasonic CS-MRE7PKE, Service Manual

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14.2 Heating Operation
14.2.1 Outdoor fan control
š
When heating operation is enabled, based on outdoor ambient temperature, fan motor control will be adjusted
according to figure below for Heating overload control:
14.2.2 Heating Room Temp Sampling Control
š
To improve the judgment accuracy, indoor room temperature sampling starts when any indoor unit has stopped
capability supplied (heating thermo-off) during heating operation with compressor ON, outdoor unit will send
signal to all thermo-off indoor units to ON fan motor and get room temperature sample.
š
To prevent discharge temperature drop at indoor units which is ON when sampling the room temperature of
heating thermo-off units, the compressor frequency is increased accordingly.
š
However, if indoor room temperature is much higher compare to remote control setting temperature, before
thermo-off, sampling of corresponding indoor unit will be cancelled.
14.2.3 Powerful Operation 2
š
During cooling / heating operation, this control is to provide fast cooling / heating operation compare to normal
operation.
š
Operation start if all condition below are complied:
o
Powerful operation ON for indoor unit.
o
Not under Annual Cooling control.
š
Operation content:
o
Outdoor fan speed will adjust automatically.
o
Compressor frequency will adjust automatically.
š
Operation stop when comply either one of the follow conditions:
o
When the powerful operation is OFF for all indoor units.
o
When annual cooling control activated.
14.3 Outdoor Quiet Cooling Operation Control
š
Purpose
Provide quiet cooling operation when only 1 indoor in operation.
š
Start Condition
o
Indoor fan speed is lower than Lo fan.
o
Only 1 operation indoor unit.
o
Not in any cooling overload zone.
o
Not during annual cooling
o
Not initial frequency operation.
o
Not during starting control.
o
Not during “Electronic part temperature rise protection by outdoor air & total current”
o
Not during “Electronic part temperature rise protection by total current”
o
Not during “IPM temperature rise prevention control”
o
During cool mode
All conditions above are satisfied and function selection enable.