Sanyo THX1252, UHX2452 Identification of the problem in this case, F06, F23 Alarm Alarm code

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Trouble Diagnosis

3. W-2WAY ECO-i Alarm Codes

(3) Leakage from the discharge tube check valve

Trouble: Although the other compressor is operating and this compressor is stopped, the discharge temperature of this compressor rises together with the temperature of the other compressor.

(4) The ambient temperature around the outdoor unit when it is stopped is 109°F (43°C) or higher.

Correction	(1)	Replace the sensor.
	(2)	Replace the outdoor unit PCB.
	(3)	Repair the refrigerant tubing.
	(4)	Adjust the amount of refrigerant.
	(5)	Correct the trouble.

Example	(1)	Sensor wiring is partially cut.
Notes	This alarm does not indicate that the sensor is disconnected.
	In order to prevent overheating during operation, the outdoor units in this system will not allow a
	compressor to start if the discharge temperature does not decrease while the compressor is
	stopped. If a sensor malfunction results in continuous detection of a high discharge temperature,
	then the compressor may stop for no apparent reason. The purpose of this alarm is to facilitate
	identification of the problem in this case.

F06, F23 Alarm

Alarm code	F06, F23

Alarm meaning	Gas temperature sensor (EXG1) trouble at outdoor heat exchanger 1; Gas temperature sensor
	(EXG2) trouble at outdoor heat exchanger 2
Alarm conditions	(1)	A/D step is 10 steps or less (short circuit).
	(2)	A/D step is 1014 steps or more (open circuit).
Probable cause	(1)	Sensor malfunction (including connector)
	(2)	PCB malfunction
Check	(1)	Measure the sensor resistance. Check that the sensor is operating normally.
	(2)	Use a remote controller monitor or PC monitor to check the temperature that is recognized by
		the microcomputer.
Correction	—
Example	—
Notes	—

F07, F24 Alarm

Alarm code	F07, F24

Alarm meaning	Liquid temperature sensor (EXL1) trouble at outdoor heat exchanger 1; Liquid temperature sensor
	(EXL2) trouble at outdoor heat exchanger 2
Alarm conditions	(1)	A/D step is 10 steps or less (short circuit).
	(2)	A/D step is 1014 steps or more (open circuit).
Probable cause	(1)	Sensor malfunction (including connector)
	(2)	PCB malfunction
Check	(1) Measure the sensor resistance. Check that the sensor is operating normally.
	(2)	Use a remote controller monitor or PC monitor to check the temperature that is recognized by
		the microcomputer.
Correction	—
Example	—
Notes	—

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Contents „ R410A Models Indoor Units Outdooe UnitsPage Check of Density Limit Contents Contents Test RUNTest Run Preparing for Test RunTest Run Procedure Items to Check Before the Test RunSetting of Unit Control PCB Main Outdoor Unit PCB SettingIndoor unit setting S004 Rotary switch, red System address S003 System address No P DIP switch, blue 10No. of outdoor units Outdoor unit setting S006 Unit No. settingAuto Address Setting Auto Address Setting Basic wiring diagram ExampleAutomatic Address Setting from the Outdoor Unit 22-9 RefrigerantCircuit Case 2 Automatic Address Setting no compressor operation Automatic Address Setting from Outdoor UnitOn the No UnitsCase 3A Automatic Address Setting in Heating Mode Automatic Address Setting* from the Remote Controller Case 3B Automatic Address Setting in Cooling ModeDisplay during automatic address setting Remote controller displayOn outdoor main unit PCB Auto Address Setting Remote Controller Test Run Settings If 1 indoor unit is connected to 1 remote controllerRemote Controller Test Run Settings Use the remote controller to check the indoor unit addressTest Run Meaning of Alarm Messages Alarm contentsPossible cause of malfunction P02 Alarm messages displayed on system controller Wireless Remote Controller Timer Remote Controller RCS-TM80BGMain Operating Functions Room Temperature Control Main Operating FunctionsThermostat is turned ON/OFF according to as shown below DegOperating mode change Shifted set temp After the compressor turns onWireless Remote Controller Mode buttonTransmitter FAN Speed selector buttonCool mode and Dry mode, if the flaps are set in a downward Filter buttonAddress button C Sensor buttonIndicator when swing operation is stopped Timer SET buttonOFF Timer OFF Cycle TimerReceiver Temperature sensors at the indoor unit side are used OperationMultiple units Group ControlUsing the Wireless Remote Control Unit How to install batteriesCover Address Settings Type D typeEmergency Operation OperationShutdown Control unit will not be acceptedPress the Emergency operation button once more Troubleshooting Trouble Possible Cause RemedyTrouble Possible Cause Timer Remote Controller RCS-TM80BG How to Use the Timer Remote Controller Operating buttonsNames and Operations Display Section Refer to Setting indication Timer No. indicationTimer program Timer OFF indicationInstallation Manual for Timer Remote Controller How to install the Remote ControllerGroup Control Using 2 Remote Controllers Remote Controller Setting ModeIndoor Unit Setting Mode To Display the Sensor Temperature13/32 Setting the Present Time Once you enter in the setting mode Day and time ﬂ ashSet to today’s day of the week Press To change the present hour in the range of 0 to 23Weekly Program Function Checking Weekly Timer Program image diagramPress To enter the program conﬁrmation mode Start setting Select a Timer numberSet the hour. program step Set the minute. program stepPress / to change the temperature setting Set the program pattern. program stepPattern Indoor unit starts operation at the programmed timeHow to invalidate the program timer How to cancel the program timer invalidationIf Power Failure Occurred Deleting the Program TimerDuplicating the Program Timer You can duplicate the preset program by daySelect the copy source Before Asking Repair WorkPrecautions „ For Example Setting at Outing Temperature 86F 30CRoom temperature Outing FunctionCanceling the outing function Outing function indicationOuting function indication Status Sleeping Function Wired Remote Controller Test Run Settings Procedure Simple Settings FunctionList of Simple Setting Items Detailed Settings Functions List of Detailed Setting Items Setting dataDescription Item code Setting data Description Setting data Code DescriptionTimer Remote Controller RCS-TM80BG Table of DC Fan Motor Tap Settings ceiling-mounted type TP6 TP3 TP1 Remote Controller Servicing Functions Display Sensor Servicing check Alarm history Press and holdMaintained Test Run Function Normal remote controller display Trouble Diagnosis Contents of Remote Controller Switch Alarm Display Heat exchanger 1 gas temp. sensor F06 Are occurring Automatic address setting is in progress Number that was set Alarm displayOFF Display meaning2WAY ECO-i Alarm Codes Alarm code Alarm meaningE06 Alaral rm Alarm code Alarm E04 occursE12 Alarm Alarm code E15 Alarm Alarm codeE16 Alarm Alarm code E20 Alarm Alarm codeE24 Alarm Alarm code At a number of indoor unitsE25 Alarm Alarm code E26 Alarm Alarm codeE29 Alarm Alarm code Power at the outdoor unit main is turned OFFF04, F05, F22 Alarm Alarm code Crossed wiring or installation errorCheck Check for crossed wiring and installation errors Outdoor unit control PCBIdentification of the problem in this case F06, F23 Alarm Alarm codeF07, F24 Alarm Alarm code Alarm meaningAlarm code F12 F16 Alarm Alarm codeF17 Alarm Alarm code F08F31 Alarm Alarm code H03 alarm Alarm codeH06 Alarm Alarm code On the degree of the problemWhich may damage the compressor Valve must be replacedH11, H12, H21, H22 Alarm Alarm code H13, H23 Alarm Alarm code H05, H15, H25 Alarm Alarm codeH31 Alarm Alarm code L04 Alarm Alarm codeL05 Alarm Alarm code L06 Alarm Alarm code L10 Alarm Alarm codeL17 Alarm Alarm code L18 alarm Alarm codeP03, P17, P18 Alarm Alarm code P04 Alarm Alarm code P05 Alarm Alarm code P16 Alarm Alarm codePrimary or secondary current Noise in some casesP22 Alarm Alarm code P26 Alarm Alarm codeP29 Alarm Alarm code Blinking inspection display 1 Automatic backup Alarm code Blinking Inspection displayCompressor magnet SW seizing detection Alarm meaning Compressor magnet SW seizing detected Alarm may be caused by the effects of noise. See notesWithin that refrigerant tubing system are stopped Corresponding outdoor unitPage PCB and Functions Outdoor Unit Control PCB Outdoor Unit Control PCB CR-CHDX14053Progress will stop the automatic address setting operation Functions for CR-CHDX14053Mode. Static signal Outdoor Unit Control PCBLink wiring Setting the Outdoor Unit address S007 Setting AddressSystem only Indoor Unit Control PCB T10JP1 For AC Fan Motor CR-UXRP71B-B For DC Fan Motor CR-SXRP56B-BCR1 for CR-KR74GXH56A/KHX0752~KHX1852 Wall-Mounted CR1 for CR-KR254GXH56A/KHX2452 Wall-Mounted CR2 for POW-KR74GXH56/KHX0752~KHX2452 Wall-Mounted Signal. Jumper wire cut Static signal continuous signal Or lessCN017 Option CN014SELF-DIAGNOSIS Function Table Alarm displayAlarm description Self-Diagnosis Function TableSelf-Diagnosis Function Table Trouble Cause and correctionCheck items E15 E16 E20 CauseAlarm code Alarm meaning DISCH2Service Checker Outdoor Unit Maintenance Remote Controller System DiagramFunctions Functions on the ordinary display Temperature monitor All units start/stop FigCooling/heating change Fig All units test run FigDisplay functions Item codes can be changed with ButtonsItem code Remarks XX-YY R.C Sample display -4, FigSample Display A, B Monitoring Operations Display of unit No main unitIndoor unit Outdoor unitOutdoor Unit Alarm History Monitor „ Setting mode Code Parameter Description SET Data„ Setting mode Parameter Description SET DataPage 200706MDC