Heating Operation - Panasonic PAPAMY1604017CE Service Manual

11.2 Heating Operation

11.2.1 Outdoor fan control

When heating operation is enabled, based on outdoor ambient temperature, fan motor control will be adjusted
according to figure below:

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.

To prevent discharge temperature drop at indoor units which is ON when sampling the room temperature of
heating thermo-off units, the outdoor fan speed will be adjusted accordingly.

However, if indoor room temperature is high compare to remote control setting temperature, sampling of
corresponding indoor unit will be cancelled.
11.2.2 Powerful Operation 1

During cooling operation, this control is to concentrate outdoor unit capability to the powerful operation enabled
indoor unit by temporary stop the capability supply to low load demand indoor units.

Operation start condition:
Powerful operation ON for targeted indoor unit
o

Operation content:
If other indoor units (where Powerful operation are OFF) achieve setting temperature continuously for
o
1 minute after received powerful command from indoor unit, then capability supply to other indoor units are
stopped for minimum 3 minutes.
Capability supply stop period follows powerful operation period.

Operation stops when comply either one of the following conditions:
When other indoor units (where Powerful operation are OFF) is lower than setting temperature.
o
When the powerful operation is OFF for all indoor units.
o
When Quiet operation received from 1 indoor unit.
o
When protection control starts.
o
11.2.3 Powerful Operation 2

During cooling / heating operation, this control is to provide fast cooling / heating operation compare to normal
operation.

Operation start if all condition below are complied:
Powerful operation ON for indoor unit.
o
Not under Annual Cooling control.
o

Operation content:
Outdoor fan speed will adjust automatically.
o
Compressor frequency will adjust automatically.
o

Operation stop when comply either one of the follow conditions:
When the powerful operation is OFF for all indoor units.
o
When annual cooling control activated.
o
RPM controlled
57.2°F
RPM free
OD temp.
22
53.6°F