Sanyo STB0810C1, STB0823H1 Air conditioner does not operate, Circuit breaker trips or fuse blows

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7-2. Air conditioner does not operate.

7-2-1. Circuit breaker trips (or fuse blows).

A. When the circuit breaker is set to ON, it is tripped soon. (Resetting is not possible.)

●There is a possibility of ground fault.

●Check insulation resistance.

If resistance value is 2MΩ or less, insulation is defective (“NO”).

Window type air conditioner

Power plug

1

Wall outlet (Receptacle)

Circuit breaker

Ground

Power supply

WARNING

*Set circuit breaker to OFF.

1Pull the power plug out of the wall outlet.

•Measure insulation resistance of unit.

NO

Insulation of unit is defective.

•Measure insulation resistance of electrical parts.

(Example)

Compressor, Fan motor, Capacitor, Relay etc.

NOTE

1.If any poorly insulated part is found, exclude that part from circuit with other parts properly connected, and then measure insulation resistance of entire air conditioner again to locate defective part.

2.Replace defective part with new one.

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Contents
Sanyo 26˝ Through the Wall AIR Conditioners & Heat Pump Please Read Before Starting Example HOW to USE this ManualTable of Contents Models STB0810C1 STB1010C1 STB1020C1 STB1220C1 Operating RangeModels STB0811C1 STB1023C1 STB1123C1 STB0823H1Unit Specifications SpecificationsCooling & Electric Heating Heat Pump Models STB0811C1 STB1023C1 STB1123C1 STB0823H1Compressor Major Component SpecificationsPOW-STBH Room Thermostat YTB-2U136 YTB-2U358 Other Component SpecificationsWall Sleeve Dimension Dimension of Wall Opening Dimensional DataModel STB0823H1 Refrigerant Flow DiagramCooling Capacity Performance Data10,200 BTU/h 700 BTU/h 11,500 BTU/h 000 BTU/h 500 BTU/h 11,300 BTU/h 980 810 650 490 300 070 22.8 Heating Capacity Heat pump Performance 100 Outdoor ambient temperature F DBElectrical Characteristics Electrical DataCooling only models Cooling & electric heating models Cooling Heat pump modelModels STB0810C1 STB1010C1 Electrical Wiring DiagramsModels STB1020C1 STB1220C1 Model STB0811C1 Models STB1023C1 STB1123C1 Model STB0823H1 Layout for Electric Parts POW-STBH For model STB0823H1 P.C.B. Assy Printed PatternCheck before and after troubleshooting TroubleshootingCheck power supply Check lead wires and connectorsCircuit breaker trips or fuse blows Air conditioner does not operateCheck Mode selector on the control panel Power is not suppliedNeither fan motor nor compressor motor runs Check transformerSome part of air conditioner does not operate Only fan does not runElectric heater does not work Only compressor unit does not run Check setting temperatureCheck compressor and electrical parts Cooling only models Cooling & electric heating modelsAir conditioner operates, but abnormalities are observed Operation does not switch from Heat to Cool or Cool to HeatPoor cooling or heating Excessive cooling or heatingRoom temp. thermistor RTH is defective If a sensor is defective. Only for heat pump modelOpen ShortChecking Electrical Components Power Cord and UnitMeasurement of Insulation Resistance Measurement of Insulation Resistance for Electrical PartsChecking Fan Motor Winding Checking Motor CapacitorChecking Compressor Motor Winding Checking ThermistorRemoving Front Grille Disassembly ProcedureRemoving Wall Sleeve Removing Electrical Component BoxRemoving Electric Heater Removing Evaporator Removing Blower WheelRemoving Propeller Fan Removing CondenserRemoving Fan Motor Room Temperature Control FunctionCooling Heating Heat Pump Model Model STB0823H1 Heating Except during defrosting operationHeat Pump Model Model STB0823H1 Defrosting Flowchart Defrosting Mode Timing ChartDefrosting Operation Heating Heat Pump Model STB0823H1 AppendixFan Switch Sanyo Hvac Service Center
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