Panasonic U-5MX4XPQ Operation Manual

Also see for U-10MX4XPQ: Installation guide

U-5~18MX4XPQ + U-4~6ML4DPQUrban Multi air conditioner4PW28162-1Operation manual35. OPERATION RANGEOperation rangeUse the system in the following temperature and humidity ranges forsafe and effective operation.6. OPERATION PROCEDURE■ Operation procedure varies according to the combination ofoutdoor unit and remote controller. Read "2. What to do beforeoperation" on page 2.■ To protect the unit, turn on the main power switch 6 hours beforeoperation.■ If the main power supply is turned off during operation, operationwill restart automatically after the power turns back on again.6.1. Cooling, heating, fan only, and automaticoperation (See figure 3 and figure 4.1)■ Changeover cannot be made with a remote controller whosedisplay shows (change-over under centralized control).■ When the display (change-over under centralized control)flashes, refer to "6.4. Setting the master remote controller" onpage 4.■ The fan may keep on running for about 1 minute after theheating operation stops.■ The air flow rate may adjust itself depending on the roomtemperature or the fan may stop immediately. This is not amalfunction.For systems without cool/heat changeover remote controlswitch (See figure 3)1 Press the operation mode selector button several times andselect the operation mode of your choice.2 Press the on/off button.The operation lamp lights up and the system starts operation.For systems with cool/heat changeover remote control switch1 Select operation mode with the cool/heat changeover remotecontrol switch as follows:2 Press the on/off button.The operation lamp lights up and the system starts operation.AdjustmentFor programming temperature, fan speed and air flow direction, referto the operation manual of the remote controller.Stopping the system3 Press the on/off button once again.The operation lamp goes off and the system stops operation.Explanation of heating operationIt may take longer to reach the set temperature for general heatingoperation than for cooling operation.The following operation is performed in order to prevent the heatingcapacity from dropping or cold air from blowing.Defrost operation■ In heating operation, freezing of the outdoor unit coil increases.Heating capability decreases and the system goes into defrostoperation.■ The indoor unit fan stops and the remote controller displays.■ After maximum 10 minutes of defrost operation, the systemreturns to heating operation again.Hot start■ In order to prevent cold air from blowing out of an indoor unit atthe start of heating operation, the indoor fan is automaticallystopped. The display of the remote controller shows .It may take some time before the fan starts. This is not amalfunction.U-5~18MX4 U-4~6ML4COOLING COOLING HEATINGOutdoor temperature –5~43°C DB –5~46°C DB –20~24°C DB(*)(*) Range for operation: –20~–15°C WB. Range for continuous operation:–15~15.5°C WB.–20~15.5°C WBIndoor temperature 21~32°C DB 21~32°C DB 15~27°C DB14~25°C WB 14~25°C WBIndoor humidity ≤80%(†)(†) to avoid condensation and water dripping out the unit.If the temperature or the humidity is beyond these conditions, safety devices maywork and the air conditioner may not operate.≤80%(†) ≤80%(†)Cooling operationHeating operationFan only operationCooling operation (figure 4.1)Heating operation (figure 4.2)Fan only operation (figure 4.3)NOTE Do not turn off power immediately after the unit stops,but wait for at least 5 minutes.NOTE ■ The heating capacity drops when the outsidetemperature falls. If this happens, use anotherheating device together with the unit. (When usingtogether with appliances that produce open fire,ventilate the room constantly.)Do not place appliances that produce open fire inplaces exposed to the air flow from the unit orunder the unit.■ It takes some time to heat up the room from thetime the unit is started since the unit uses a hot-aircirculating system to heat the entire room.■ If the hot air rises to the ceiling, leaving the areaabove the floor cold, we recommend that you usethe circulator (the indoor fan for circulating air).Contact your dealer for details.