Sanyo UHX1852, UHX2452, UHX0752, UHX1252, UHX3652, THX2452, THX1252 Indoor Unit Control PCB, T10, JP1

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PCB and Functions

2. Indoor Unit Control PCB

1. Indoor Unit Control PCB Switches and Functions Indoor unit control PCB

T10:

6P plug (yellow): Used for remote control. (Refer to the remote control section.)

(CN61)

Control items: (1) Start/stop input

(2) Remote controller prohibit input

 

(3) Start signal output

(4) Alarm signal output

EXCT:

2P plug (red): Can be used for demand control. When input is present, forces the unit to operate with the thermostat

(CN73)

OFF.

 

DISP:

2P plug (white): Short-circuiting this plug allows the unit to be operated by the remote controller, even if it is not

(CN72)

connected to an outdoor unit.

 

 

(In this case, alarm "E04," which indicates trouble in the serial communication between the indoor and outdoor unit,

 

does not occur.)

 

CHK:

2P plug (white): Test pin. Short-circuiting this pin allows the indoor FM (H fan speed), drain pump, fl ap motor (F1

 

position), and electronic expansion valve full-open position to be checked.

 

However this function turns OFF if the indoor unit protection mechanism is activated. The unit can be operated even

 

if the remote controller and outdoor unit are not connected. However even if the remote controller cannot is con-

 

nected, it cannot be used to operate the unit. This function can be used for short-term tests.

JP1:

Jumper wire: Allows selection of the T10 terminal start/stop signal. (Refer to the remote control section.) Status at

(J01)

shipment: Pulse signal

 

 

Jumper wire cut: Static signal (continuous signal)

FAN DRIVE 2P plug (white): This terminal sends a signal to the ventilation fan when the FAN button on the wired remote con- troller is used to operate a commercially-available ventilation fan. (Refer to the remote control section.)

Use a ventilation fan which can accept no-voltage A contact as the external input signal.

FILTER:

2P (white): This terminal is used to connect contact input from the differential pressure switch which detects fi lter

(CN70)

clogging. When the contacts turn ON, "FILTER" is displayed on the wired remote controller.

Power LED: LED (red): Illuminates when power is supplied. Blinks when there is a failure in the EEPROM (IC10: nonvolatile memory).

EEPROM: Nonvolatile memory: Memory which stores the unit type data and other information. When the PCB is replaced,

(IC10) remove the EEPROM from the old PCB and install it onto the new PCB. If an IC failure occurs, replace with a new IC which was provided with the service PCB, and set the necessary information from the wired remote controller. (For the procedure, refer to the servicing technical materials.)

GRL:

For AC fan motor (CR-UXRP71B-B: 3P (yellow))

(CN20)

For DC fan motor (CR-SXRP56B-B: 5P (blue))

zThe indoor unit power terminal plate will be a 7P type or may be a 5P type. (Refer to the fi gure at below.) The basic wiring dia- gram shows the 7P-type terminal plate. Therefore the terminal plate may differ from the illustrations.

7P-type terminal plate

5P-type terminal plate

R S

T U1 U2

1 2

L1 L2

U1 U2

Power

Inter-unit

Remote

Power

Remote

supply

control line

control line

supply

control line

4-6

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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. settingAutomatic Address Setting from the Outdoor Unit Auto Address SettingAuto Address Setting Basic wiring diagram Example Circuit 22-9Refrigerant 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 ModeOn outdoor main unit PCB Display during automatic address settingRemote controller display 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 Possible cause of malfunction Meaning of Alarm MessagesAlarm contents P02 Alarm messages displayed on system controller Main Operating Functions Wireless Remote ControllerTimer Remote Controller RCS-TM80BG 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 ControlCover Using the Wireless Remote Control UnitHow to install batteries Address Settings Type D typeEmergency Operation OperationShutdown Control unit will not be acceptedPress the Emergency operation button once more Trouble Possible Cause TroubleshootingTrouble Possible Cause Remedy 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 FunctionOuting function indication Status Canceling the outing functionOuting function indication Sleeping Function Wired Remote Controller Test Run Settings Procedure Simple Settings FunctionList of Simple Setting Items Detailed Settings Functions Description List of Detailed Setting ItemsSetting data 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 Maintained Remote Controller Servicing FunctionsDisplay Sensor Servicing check Alarm history Press and hold 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 codeL05 Alarm Alarm code H31 Alarm Alarm codeL04 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 casesP29 Alarm Alarm code P22 Alarm Alarm codeP26 Alarm Alarm code Compressor magnet SW seizing detection Blinking inspection display 1 Automatic backupAlarm code Blinking Inspection display 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 PCBSystem only Link wiringSetting the Outdoor Unit address S007 Setting Address JP1 Indoor Unit Control PCBT10 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 CN017 Signal. Jumper wire cut Static signal continuous signalOr less 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 Functions Functions on the ordinary display Outdoor Unit Maintenance Remote ControllerSystem Diagram Temperature monitor All units start/stop FigCooling/heating change Fig All units test run FigItem code Remarks Display functionsItem codes can be changed with Buttons 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