Sanyo KHX0952, UHX2452, UHX0752, UHX1252, UHX3652, UHX1852, THX2452 Alarm code Alarm meaning, DISCH2

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Self-Diagnosis Function Table

1. Self-Diagnosis Function Table

•The outdoor unit maintenance remote controller can be used to check the alarm display.

The number of times that LED 1 and 2 blink on the outdoor unit control PCB can be used to check the alarm display. (Refer to “Checking the LED 1 and 2 Alarm Display on the Outdoor Unit Control PCB.”)

Alarm code

Alarm meaning

 

E06

Outdoor unit failed to receive serial communication signals from indoor unit.

 

E12

Automatic address setting start is prohibited.

 

E15

Automatic address setting alarm (too few units)

 

E16

Automatic address setting alarm (too many units)

 

E20

No indoor units at automatic address setting.

 

E24

Outdoor unit failed to receive communications from another outdoor unit.

 

E25

Outdoor unit address setting failure (duplication)

 

E26

Mismatch in outdoor unit quantity

 

E29

Outdoor unit failed to receive communication from another outdoor unit.

 

E30

Outdoor unit serial communications failure

 

F04

Compressor 1 discharge temperature sensor trouble

(DISCH1)

F05

Compressor 2 discharge temperature sensor trouble

(DISCH2)

F06

Gas temperature sensor trouble at outdoor heat exchanger 1

(EXG1)

F07

Liquid temperature sensor trouble at outdoor heat exchanger 1

(EXL1)

F08

Outdoor air temperature sensor trouble

(AIR TEMP)

F12

Compressor intake temperature sensor trouble

(SCT)

F16

High-pressure sensor trouble

(HPS)

F17

Low-pressure sensor trouble

(LPS)

F22

Compressor 3 discharge temperature sensor trouble

(DISCH3)

F23

Gas temperature sensor trouble at outdoor heat exchanger 2

(EXG2)

F24

Liquid temperature sensor trouble at outdoor heat exchanger 2

(EXL2)

F31

Outdoor unit non-volatile memory (EEPROM) trouble

 

H03

Compressor 1 CT sensor disconnected or short-circuit

 

H06

Low-pressure trouble

 

H08

Compressor 1 oil detection sensor (connection) trouble

 

H11

Constant speed compressor 2 overcurrent alarm

 

H12

Constant speed compressor 2 lock current alarm

 

H13

Compressor 2 CT sensor disconnected or short-circuit

 

H15

Compressor 2 discharge temperature sensor disconnected

 

H21

Compressor 3 overcurrent alarm

 

H22

Compressor 3 lock current alarm

 

H23

Compressor 3 CT sensor disconnected or short-circuit

 

H25

Compressor 3 discharge temperature sensor disconnected

 

H27

Compressor 2 lock current alarm

 

H28

Compressor 3 lock current alarm

 

H31

HIC trouble alarm

 

L04

Outdoor unit address duplication

 

L05

Duplicated indoor unit priority (alarm at priority indoor units)

 

L06

Duplicated indoor unit priority (alarm at non-priority indoor units and outdoor unit)

 

L10

Outdoor unit capacity not set

 

L17

Outdoor unit model mismatch

 

L18

4-way valve operation failure.

 

P03

Compressor 1 discharge temperature trouble

 

P04

High-pressure switch activated

 

P05

Reverse phase (or missing phase) detected, capacity mismatch

 

P14

O2 sensor is activated.

 

P16

Compressor 1 overcurrent

 

P17

Compressor 2 discharge temp trouble

 

P18

Compressor 3 discharge temp trouble

 

P22

Fan motor trouble

 

P26

Inverter compressor high-frequency overcurrent alarm

 

P29

Inverter compressor missing phase or lock alarm

 

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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 SettingNo. of outdoor units Outdoor unit setting S006 Indoor unit setting S004 Rotary switch, redSystem address S003 System address No P DIP switch, blue 10 Unit No. settingAuto Address Setting Auto Address Setting Basic wiring diagram ExampleAutomatic Address Setting from the Outdoor Unit 22-9 RefrigerantCircuit On the No Case 2 Automatic Address Setting no compressor operationAutomatic Address Setting from Outdoor Unit 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 Remote Controller Test Run Settings Auto Address Setting Remote Controller Test Run SettingsIf 1 indoor unit is connected to 1 remote controller 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 Thermostat is turned ON/OFF according to as shown below Room Temperature ControlMain Operating Functions DegOperating mode change Shifted set temp After the compressor turns onTransmitter Wireless Remote ControllerMode button FAN Speed selector buttonAddress button Cool mode and Dry mode, if the flaps are set in a downwardFilter button C Sensor buttonOFF Timer Indicator when swing operation is stoppedTimer SET button OFF Cycle TimerReceiver Multiple units Group Temperature sensors at the indoor unit side are usedOperation ControlUsing the Wireless Remote Control Unit How to install batteriesCover Address Settings Type D typeShutdown Emergency OperationOperation 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 Timer program Display Section Refer to Setting indicationTimer No. indication Timer OFF indicationInstallation Manual for Timer Remote Controller How to install the Remote ControllerIndoor Unit Setting Mode Group Control Using 2 Remote ControllersRemote Controller Setting Mode To Display the Sensor Temperature13/32 Set to today’s day of the week Setting the Present TimeOnce you enter in the setting mode Day and time fl ash Press To change the present hour in the range of 0 to 23Press To enter the program confirmation mode Start setting Weekly Program Function Checking Weekly TimerProgram image diagram Select a Timer numberSet the hour. program step Set the minute. program stepPattern Press / to change the temperature settingSet the program pattern. program step Indoor unit starts operation at the programmed timeIf Power Failure Occurred How to invalidate the program timerHow to cancel the program timer invalidation Deleting the Program TimerSelect the copy source Duplicating the Program TimerYou can duplicate the preset program by day Before Asking Repair WorkRoom temperature Precautions„ For Example Setting at Outing Temperature 86F 30C 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 OFF Are occurring Automatic address setting is in progressNumber that was set Alarm display Display meaning2WAY ECO-i Alarm Codes Alarm code Alarm meaningE12 Alarm Alarm code E06 Alaral rm Alarm codeAlarm E04 occurs E15 Alarm Alarm codeE24 Alarm Alarm code E16 Alarm Alarm codeE20 Alarm Alarm code At a number of indoor unitsE29 Alarm Alarm code E25 Alarm Alarm codeE26 Alarm Alarm code Power at the outdoor unit main is turned OFFCheck Check for crossed wiring and installation errors F04, F05, F22 Alarm Alarm codeCrossed wiring or installation error Outdoor unit control PCBF07, F24 Alarm Alarm code Identification of the problem in this caseF06, F23 Alarm Alarm code Alarm meaningF17 Alarm Alarm code Alarm code F12F16 Alarm Alarm code F08F31 Alarm Alarm code H03 alarm Alarm codeWhich may damage the compressor H06 Alarm Alarm codeOn the degree of the problem 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 L17 Alarm Alarm code L06 Alarm Alarm codeL10 Alarm Alarm code L18 alarm Alarm codeP03, P17, P18 Alarm Alarm code P04 Alarm Alarm code Primary or secondary current P05 Alarm Alarm codeP16 Alarm Alarm code 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 Within that refrigerant tubing system are stopped Alarm meaning Compressor magnet SW seizing detectedAlarm may be caused by the effects of noise. See notes 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 Self-Diagnosis Function Table Alarm displayAlarm descriptionSelf-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 Cooling/heating change Fig Temperature monitorAll units start/stop 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 Indoor unit Monitoring OperationsDisplay of unit No main unit Outdoor unitOutdoor Unit Alarm History Monitor „ Setting mode Code Parameter Description SET Data„ Setting mode Parameter Description SET DataPage 200706MDC
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