Fujitsu Understanding Forced Cooling Operation and Efficiency
Page 17

14. FORCED COOLING OPERATION (TEST OPERATION)

When FORCED COOLING OPERATION is set, the operation is controlled as shown in Table15. ( Table15 : FORCED COOLING OPERATION )

 

Forced cooling operation

OPERATION MODE

Cooling

FAN CONT. MODE

Hi

TIMER MODE

-

SETTING TEMP.

Room Temp is not controlled

SETTING LOUVER

Horizontal

 

(It is changed follow as setting of remote controller)

SWING

OFF

ECONOMY

-

Forced cooling operation is started when press MANUAL AUTO button for 10 seconds or more. During the forced cooling operation, it operates regardless of room temperature sensor. Operation lamp and Timer lamp blink at the same time during the forced cooling operation.

They blink for 1 second ON and 1 second OFF on both Operation lamp and Timer lamp (same as test operation).

Forced cooling operation is released after 60 minutes of starting operation or pressing MANUAL AUTO button for 3 seconds or pressing START/STOP button on the remote controller.

15. COMPRESSOR PREHEATING

When the outdoor heat exchanger temperature is lower than 5°C and the all operation has been stopped for 30 minutes, power is applied to the compressor and the compressor is heated. (By heating the compressor, warm air is quickly discharged when operation is started.)

When operation was started, and when the outdoor temperature rises to 7°C (44.6°F) or greater, preheating is ended.

16. ECONOMY OPERATION

The ECONOMY operation functions by pressing ECONOMY button on the remote controller.

At the maximum output, ECONOMY Operation is approximately 70% of normal air conditioner operation for cooling and heating.

The ECONOMY operation is almost the same operation as below settings. ( Table 16 )

Mode

Cooling/ Dry

Heating

 

 

 

Target temperature

Setting temp.+1°C (2°F)

Setting temp.-1°C (-2°F)

 

 

 

17. POWERFUL OPERATION

The POWERFUL OPERATION functions by pressing POWERFUL button on the remote controller. The indoor unit & outdoor unit will operate at maximum power as shown in Table17.

(Table17)

 

Powerful operation

COMPRESSOR FREQUENCY

Maximum

 

 

FAN CONT. MODE

Powerful

SETTING LOUVER

Cooling/ Dry : 3, Heating : 5

Release Condition is as follows. [Cooling / Dry]

-Room temperature < Setting temperature - 1.5°C (-3°F) or Operation time has passed 20 minutes.

=

[Heating]

-Room temperature > Setting temperature +1.5°C (+3°F) or Operation time has passed 20 minutes.

=

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Contents Service Instruction Contents Appending Data Page Wall Mounted type Cooling Operation DRY Operation Heating Operation01-03 Auto Changeover OperationFan speed Indoor FAN ControlFAN Operation Cooling OperationHeating Operation Cool AIR Prevention Control Heating modeMoisture Return Prevention Control Cooling mode& Dry mode Outdoor Fan Motor Outdoor FAN ControlLouver Control Adjust the RIGHT-LEFT LouversVertical Louver Control Function RangeCompressor Control Limitation of Compressor Frequency by Outdoor TemperatureOpeartion Frequency Range Opeartion Frequency Control AT Normal Start UPProgram Timer Timer Opeartion ControlHeating operation mode Sleep TimerCooling operation mode FOUR-WAY Valve Extension Select Prevent to Restart for 3 Minutes 3 Minutes STAuto Restart 24C 75FForced Cooling Operation Test Operation Powerful OperationCompressor Preheating Economy OperationCondition of Starting the Defrost Operation Defrost Operation ControlCondition of the Defrost Operation Completion Release Condition01-14 Defrost Flow ChartNormal defrost Integrating defrost Defrost end 01-15 OFF Defrost Opeartion ControlVarious Protections Discharge GAS Temperature Overrise Prevension ControlCurrent Release Control 01-16Cooling Pressure Overrise Protection Antifreezing Control Cooling and Dry modeHigh Temperature Release Control Heating Mode Trouble Shooting Error Display TroubleshootingOutdoor unit Main PCB Trouble Shooting with Error CodeCheck Point 4 Check Serial Signal Reverse Transfer Signal Indoor unit Controller PCB Indoor unit Fan motor Check Point Check Indoor unit electric components Indoor unit Controller PCBCheck Point Check external cause such as noise Check Point 3 Replace Controller PCBCheck Point 2 Replace Controller PCB Indoor unit Controller PCB Indicator PCB Manual auto switchIndoor unit Controller PCB Room temperature thermistor Indoor unit Controller PCB Heat Ex. temperature thermistor Check Point 3 Check Indoor unit fan motor Check Point 2 Check ambient temp. around motorCheck Point 1-2 Check external cause Check Point 2 Replace Main PCBCheck Point 3 Replace Main PCB Check Point 2 Check connection of Connector02-11 CN71 CN70 Outdoor unit Main PCB Discharge pipe temperature thermistorResistance Value k 606 759 213 8531 Outdoor unit Main PCB Heat exchanger temperature thermistorOutdoor unit Main PCB Outdoor temperature thermistor Check Point 4 Replace Main PCB Check Point 3 Check Compressor Outdoor unit Main PCB CompressorCheck Point 2 Check Heat exchanger Check Point 3 Replace Main PCB Check Point 4 Check Output Voltage of Main PCB Outdoor unit Main PCB Outdoor unit Fan motorCheck Point 3 Check Outdoor unit fan motor Check Point 3 Check the solenoid coil and 4-way valve Check Point 2 Check each thermistorForecast of Cause Check Point 3 Check Electrical Components Trouble Shooting with no Error CodeIndoor Unit No Power Outdoor Unit No Power 02-23 No Cooling / No Heating Check Point Check Indoor/ Outdoor installation conditionCheck Point 2 Check Outdoor unit operation Check Point 3 Check Site conditionWater Leaking Abnormal NoiseReplace Compressor Service Parts InformationCompressor Inverter Compressor Check Point 5 Check Opening and Closing Operation of Valve Outdoor unit Electronic Expansion Valve EEVBlue Red Outdoor unit fan motor Indoor unit fan motorPage Appending Data Setting the Filter Sign Function SettingCooling Room Temperature Correction Heating Room Temperature CorrectionYes Setting the Auto RestartRemote controller signal code Procedures to change the Function Setting for wireless RC Selecting the Function Number and Setting Value Remote Controller Signal Code Setting Discharge thermistor Room temperature thermistorPage 1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan
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