Sanyo XMHS0972 Protective Functions, Overload prevention during heating, Freeze prevention

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7-2. Protective Functions

Overload prevention during heating

During HEAT operation, the temperature of the indoor heat exchanger is used to control the frequency and lessen the load on the compressor before the protective device is activated.

exchanger

Approx.

 

 

 

Indoor heat exchanger

(53)

 

 

 

B. Control end

°F(°C)

 

A

 

temperature

127

 

 

A. Control start

Approx.

 

 

 

 

heat

 

 

 

B

117

 

 

 

Indoor

(47)

 

 

 

 

 

a

b

c

d

a.Area: Automatic capacity control

b.When Point A has been exceeded, the operation frequency is reduced by a certain proportion.

c.Area: Frequency increase is prohibited.

d.At Point B and below, overload prevention is ended and control is the same as in the a area.

Cold-air prevention during heating

During heating, the fan speed is set to "LL" (very low) or stopped. As the temperature of the indoor heat exchanger rises, the fan speed is changed to the set speed.

High

 

 

Set fan speed

At stability of operation

 

 

 

 

 

 

At start of operation

LL

 

 

 

Stopped

77

86

Approx. 104

 

 

(25)

(30)

(40)

Indoor heat exchanger

NOTE

temperature °F(°C)

Freeze prevention

During COOL or DRY operation, freezing is detected and operation is stopped when the temperature of the indoor heat exchanger matches the conditions below.

1.Freeze-prevention operation is engaged when the temperature of the indoor heat exchanger is below 43°F(6°C).

2.Restart after freeze-prevention operation occurs when the temperature of the indoor heat exchanger reaches 46°F(8°C) or above.

exchanger

46

 

 

 

C

 

 

 

 

 

°F(°C)

(8)

 

A

B

 

 

 

 

temperature

43

 

 

(6)

 

 

 

 

heat

36

 

 

 

 

Indoor

*

 

 

 

(2)

 

 

 

 

 

 

 

 

 

 

a

b

c

d

a.Area: Automatic capacity control

b.When the temperature drops below Point A, the operation frequency is reduced by a certain proportion.

c.Area: Frequency increase is prohibited.

d.When the temperature reaches Point C or above, freezing prevention is ended and control is the same as in the a area.

*When the temperature drops to below 36°F(2°C) (continuously for 2 minutes or longer), the compressor stops. Once the freeze condition is detected, the air conditioner will work less than the maximum frequency until it is turned off.

The fan speed is forcibly changed to "LL" beginning 30 seconds after the thermostat turns OFF.

At stability of operation refers to operation when the room temperature has approached the set temperature.

When HEAT operation starts, the indoor fan is stopped until the temperature of the indoor heat exchanger reaches 68°F(20°C) or higher, or until the room temperature reaches 59°F(15°C) or higher.

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Contents 11,900BTU / h XMHS1272 PNR-XS1872 17,500BTU / h XHS1872 PNR-XS1872Safety Precautions Prohibit Table of Contents STK-RCS-7TWSUA Applicable MULTI-OUTDOOR Units Operating Range Indoor Air Intake Temp Outdoor Air Intake TempSpecifications Unit SpecificationsIndoor Unit XMHS0972 & PNR-XS1872 Indoor Unit XMHS0972 & PNR-XS1872208V XMHS1272 & PNR-XS1872 XMHS1272 & PNR-XS1872 XHS1872 & PNR-XS1872 XHS1872 & PNR-XS1872 Indoor Unit Body XMHS0972 Major Component SpecificationsIndoor Unit Indoor Unit PanelIndoor Unit Body XMHS1272 Indoor Unit Body XHS1872 Indoor heat exchanger sensor Other Component SpecificationsModelKTEC-35-S98 ModelPT2M-51H-S3Dimensional Data 534Refrigerant Flow Diagram Refrigerant Flow DiagramIndoor Unit XHS1872 & PNR-XS1872 Indoor unit 5250-46900 Electric Wiring DiagramsElectrical Data 8FA2Disconnect the connectors in the control box MaintenanceDisassembly Procedure Remove the air intake grillRemove the ceiling panel Remove the indoor air temperature sensor Remove the power box and control boxScrew Ground cable CN07 ScrewCN03 CN09 CN06 Remove the main body lower section Remove the drain pump and float switch Remove the heat exchanger sensorRemove the turbo fan and fan motor Remove the heat exchangerEmergency operation FunctionsOperation Functions Auto cooling/heating operationTimer backup Lamp colorsCold-air prevention during heating Protective FunctionsOverload prevention during heating Freeze preventionTroubleshooting Precautions before Performing Inspection or RepairMethod of Self-Diagnostics Self-diagnostics Lamps Replace the controller Using the TEST/T-RUN terminalsChecking the Indoor and Outdoor Units Replace the circuit board or the fuseOff Blinking Illuminated Serial Communication Error Identification ProcedureBefore the Operation Condition E01Terminal board Outdoor Unit Condition E12 Trouble Diagnosis of Fan Motor Indoor Fan MotorElectromagnetic interference Noise Malfunction and Electromagnetic InterferenceNoise malfunction Locations most susceptible to noise Trouble CorrectionXMHS0972 & PNR-XS1872 XMHS1272 & PNR-XS1872 Mode D’EMPLOI Pub. OI-85264181140000 SanyoFeatures ContentsSafety Instructions Alert SymbolsInstallation Location Product InformationNames of Parts Unit Display and Operation ButtonRemote Control Unit Display SymbolsRemote Control Unit Mode selector button HR. Timer button 1-HOUR OFF TimerTemperature setting buttons Temp SensorUsing the Remote Control Unit Single/Multiple switchOperation with the Remote Control Unit Automatic OperationManual Operation Adjusting the Fan Speed Night Setback ModeHigh Power Mode Setting the Timer Special RemarksHow to set daily ON/OFF repeat timer How to set the OFF timeHow to set the on time 1030 pm 710 am 1100 am Present timeHour OFF Timer Using the 1-HOUR OFF TimerAdjusting the Airflow Direction Operation together with the daily ON/OFF repeat timerCleaning the flaps Care and CleaningWhen the air conditioner is not running Cleaning the main unit and remote control unitAir filter How to remove the filterHow to remove the air intake grille Care After a prolonged idle periodTroubleshooting Wired Remote ControllerOperating Range XHS1872 & PNR-XS1872 XHS1271 XHS1872 Pub. OI-85264181107001 SanyoOI-107-2-EG Important Multiple use is applied for the model XHS1872 only DRY orange, Cool green and FAN green OI-107-5-EG OI-107-6-EG FAN OI-107-8-EG OI-107-9-EG Fan Only OI-107-11-EG OI-107-12-EG Sweep Cool Drysweep Heat FAN OI-107-14-EG OI-107-15-EG Max Min For Single use For Multiple Use Appendix C Installation Instructions Contents For Indoor UnitPlease Read Before Starting General Tools Required for Installation not suppliedAccessories Supplied with Unit Table Optional Copper Tubing KitInstallation Site Selection Additional Materials Required for InstallationEmbedding the Tubing and Wiring H1, H2, H3, H4Suspending the Indoor Unit How to Install the Indoor UnitPreparation for Suspending Placing the Unit Inside the CeilingAttach so that the hose band Installing the Drain PipingDo not install an air bleeder as Fastener is on the sideChecking the Drainage 10aInstalling the Ceiling Panel Indoor unit Gaps Ceiling surface Ceiling panelWiring the Ceiling Panel and the Indicator Attaching the air-intake grilleAdjusting the Auto Flap Checking After InstallationWhen Removing the Ceiling Panel for Servicing Wiring Instructions General precautions on wiringHow to connect wiring to the terminal For Indoor Unit For Outdoor Unit For solid core wiring or F-cableFor stranded wiring How to Test Run the Air Conditioner To take out the remote control unit, pull it forward Remote Control Unit Installation PositionRear side Remote control unit mount Mounting on a WallAddress Switch Address Setting of the Remote Control UnitConnecting a Home Automation Device Installation Check SheetSTK-RCS-7TWSUA STK-RCS-7TWSUA Pub. OI-85264181139000 SanyoAutomatic Operation only for COOL/DRY/HEAT Model OI-139-3-EG Timer and Present Time setting buttons SET buttonTimer Select button Automatic Operation Only for COOL/DRY/HEAT Model Remote Control Unit Display Heating Mode Only for COOL/DRY/HEAT ModelDaily on / OFF Backup functionProgrammed 910 pm 710 am 1130 pm Present timeOI-139-9-EG Appendix E Installation Instructions STK-RCS-7TWSUA How to install the remote controller Parts supplied with the remote controllerRemote controller installation guidelines Installation locationInstalling with in-wall junction box Installing directly onto the wallHow to wire the remote controller ON/OFF

XMHS1272, XMHS0972 specifications

Sanyo has long been a recognized name in the landscape of home appliances and audio-visual equipment, and their XMHS series, particularly the XMHS0972 and XMHS1272 models, offers innovative technology and impressive features for discerning users. These models are designed to cater to a wide range of needs, making them suitable for different environments, whether it’s for personal use or for larger gatherings.

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In conclusion, the Sanyo XMHS0972 and XMHS1272 models are powerful and efficient options for anyone in need of high-quality audio and versatile connectivity. With their stylish design, advanced technology features, and reduced energy consumption, they stand out as innovative choices for modern users looking to enhance their entertainment experience.