Fujitsu AOU12RL2, ASU12RL2, AOU09RL2 Defrost Flow Chart, Normal defrost Integrating defrost, 01-14

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3. Defrost Flow Chart

The defrosting shall proceed by the integrating operation time, outdoor temperature and outdoor heat exchanger temperature as follows.

Heating operation start : Compressor ON

(Not defrosted for 10 minutes)

Normal defrost

Integrating defrost

Outside air temp. > -10°C= (14°F)

Outdoor HEX temp.

Below - 17°C(1.4°F)

Outside air temp. < -10°C(14°F)

Outdoor HEX temp.

-Outside air temp. Below - 7°C(-44.6°F) or

Outdoor HEX temp. Below - 20°C(-4°F)

Intermittent		operation			Continuous operation

	Compressor			Compressor			Compressor
	OFF count :			integrating			integrating
	40 times			operation:			operation:
	(Less than 10min.)			Over 240 min.			Over 213 min.


				Outdoor			Outdoor
				heat exchanger			heat exchanger
				temperature:			temperature:
				Below - 3°C			Below - 5°C
				(26.6°F)			(23°F)

Defrost start

Defrost Indicator: [Operation lamp]

7 sec ON / 2 sec OFF

Outdoor fan : OFF

Compressor speed : 0 rps

4-way valve : OFF

Compressor speed : 90rps

Outdoor HEX temp.: Over 16°C (60.8°F)

or

Compressor ON time: Maximum 15 minutes

Defrost end

01-14

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Contents Service Instruction Contents Appending Data Page Wall Mounted type Cooling Operation DRY Operation Heating Operation01-03 Auto Changeover OperationCooling Operation Indoor FAN ControlFan speed FAN OperationMoisture Return Prevention Control Cooling mode& Dry mode Cool AIR Prevention Control Heating modeHeating Operation Outdoor Fan Motor Outdoor FAN ControlFunction Range Adjust the RIGHT-LEFT LouversLouver Control Vertical Louver ControlOpeartion Frequency Control AT Normal Start UP Limitation of Compressor Frequency by Outdoor TemperatureCompressor Control Opeartion Frequency RangeProgram Timer Timer Opeartion ControlCooling operation mode Sleep TimerHeating operation mode 24C 75F Prevent to Restart for 3 Minutes 3 Minutes STFOUR-WAY Valve Extension Select Auto RestartEconomy Operation Powerful OperationForced Cooling Operation Test Operation Compressor PreheatingRelease Condition Defrost Operation ControlCondition of Starting the Defrost Operation Condition of the Defrost Operation CompletionNormal defrost Integrating defrost Defrost Flow Chart01-14 Defrost end 01-15 OFF Defrost Opeartion Control01-16 Discharge GAS Temperature Overrise Prevension ControlVarious Protections Current Release ControlHigh Temperature Release Control Heating Mode Antifreezing Control Cooling and Dry modeCooling Pressure Overrise Protection Trouble Shooting Error Display TroubleshootingCheck Point 4 Check Serial Signal Reverse Transfer Signal Trouble Shooting with Error CodeOutdoor unit Main PCB Indoor unit Controller PCB Indoor unit Fan motor Check Point 3 Replace Controller PCB Indoor unit Controller PCBCheck Point Check Indoor unit electric components Check Point Check external cause such as noiseCheck 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 2 Check Heat exchanger Outdoor unit Main PCB CompressorCheck Point 3 Check Compressor Check Point 3 Replace Main PCB Check Point 3 Check Outdoor unit fan motor Outdoor unit Main PCB Outdoor unit Fan motorCheck Point 4 Check Output Voltage of Main PCB Check Point 3 Check the solenoid coil and 4-way valve Check Point 2 Check each thermistorForecast of Cause Indoor Unit No Power Trouble Shooting with no Error CodeCheck Point 3 Check Electrical Components Outdoor Unit No Power 02-23 Check Point 3 Check Site condition Check Point Check Indoor/ Outdoor installation conditionNo Cooling / No Heating Check Point 2 Check Outdoor unit operationWater Leaking Abnormal NoiseCompressor Service Parts InformationReplace Compressor Inverter Compressor Blue Red Outdoor unit Electronic Expansion Valve EEVCheck Point 5 Check Opening and Closing Operation of Valve Outdoor unit fan motor Indoor unit fan motorPage Appending Data Heating Room Temperature Correction Function SettingSetting the Filter Sign Cooling Room Temperature CorrectionRemote controller signal code Setting the Auto RestartYes 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