Panasonic CU-3E19RBU-5 Service Manual

Also see for CU-3E19RBU-5: Operating instructions

Panasonic CU-3E19RBU-5 Service Manual Manual pdf 51 page image

5111. Operation Control11.1 Cooling Operation11.1.1 Outdoor fan control When cooling operation is enabled, based on outdoor ambient temperature, fan motor control will be adjustedaccording to figure below:11.1.2 Annual Cooling control This control is to enable cooling operation when outdoor ambient temperature is low. Control start conditions:o Cooling operation is activated with compressor ON.o Outdoor ambient temperature is less than 59°F (15°C). Control contents:o When the above conditions are fulfilled, based on outdoor pipe temperature, the outdoor fan motor willoperate according to figure below: To improve the judgment accuracy during annual cooling control, outdoor ambient temperature sampling for2 minutes will be activated every 35 minutes under designated fan speed. Control stop conditions:o When either one of the start conditions are not complied.11.1.3 Cooling Powerful Operation 1 During cooling operation, this control is to concentrate outdoor unit capability to the powerful operation enabledindoor unit by temporary stop the capability supply to low load demand indoor units. Operation start condition:o Powerful operation ON for targeted indoor unit. Operation content:o If other indoor units (where Powerful operation are OFF) achieve setting temperature continuously for1 minute after received powerful command from indoor unit, then capability supply to other indoor units arestopped for minimum 3 minutes.Capability supply stop period follows powerful operation period. Operation stops when comply either one of the following conditions:o 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.RPM freeRPM controlled59.0°F (15°C)55.4°F (13°C)Stopped8.6°F (-13°C)OD temp.RPM upRPM unchanged93.2°F (34°C)91.4°F (33°C)RPM downStopped75.2°F (24°C)73.4°F (23°C)66.2°F (19°C)64.4°F (18°C)OD Pipe temp.