Operation Control; Cooling Operation - Panasonic PAPAMY1702034CE Service Manual

12. Operation Control

12.1 Cooling Operation

12.1.1 Outdoor fan control

When cooling operation is enabled, based on outdoor ambient temperature, fan motor control will be adjusted
according to figure below:
12.1.2 Annual Cooling control

This control is to enable cooling operation when outdoor ambient temperature is low.

Control start conditions:
Cooling operation is activated with compressor ON.
o
Outdoor ambient temperature is less than 15°C
o

Control contents:
When the above conditions are fulfilled, based on outdoor pipe temperature, the outdoor fan motor will
o
operate according to figure below:

To improve the judgment accuracy during annual cooling control, outdoor ambient temperature sampling for
2 minutes will be activated every 35 minutes under designated fan speed.

Control stop conditions:
When either one of the start conditions are not complied.
o
12.1.3 Cooling 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 demand for capacity.
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
RPM free
15°C
RPM controlled
12°C
Stopped
OD temp.
RPM up
34°C
RPM unchanged
24°C
RPM down
19°C
Stopped
OD Pipe temp.
38
13°C
33°C
23°C
18°C