10-19-00 Air Conditioner Heat Pump Service Manual - Bryant RV ...

Section C - Components, cont’d.Model 59126.502, 630025 First, turn the 20 amp air conditionerbreaker to OFF. Next, remove the wires from theswitch. With the switch in the OFF position, you should nothave continuity between Terminal L1 and any other whitenumbered terminal. See FIG. C4.In the first HIGH FAN position you should havecontinuity between Terminal L1 and Terminal 1 only.In the second HIGH FAN position, you should havecontinuity between Terminal L1 and Terminal 2 only.In the LOW FAN position you should have continuitybetween Terminal L1 and Terminal 4 only.In the first HIGH COOLING position you should havecontinuity between Terminal L1 and Terminal H; andTerminal L1 and Terminal 1 only.In the second HIGH COOLING position, you shouldhave continuity between Terminal L1 and H; and TerminalL1 and Terminal 2 only.In the LOW COOLING position, you should have continuitybetween Terminal L1 and Terminal H; and TerminalL1 and Terminal 4 only.In the first HIGH HEATING position, you should havecontinuity between Terminal L1 and Terminal C; andTerminal L1 and Terminal 1 only.In the second HIGH HEATING position, you shouldhave continuity between Terminal L1 and Terminal C;and Terminal L1 and Terminal 2 only.In the LOW HEATING position, you should have continuitybetween Terminal L1 and Terminal C; and TerminalL1 and Terminal 4 only.Be sure to check the switch in all positions and be sure youhave continuity only on the terminals for the selected position.Lack of continuity or continuity on incorrect terminalsdesignates a defective switch, and it must be replaced.FIG. C1432C10. Changeover ThermostatThe changeover thermostat is a capillary tube/bellows-typeswitch. Its function is to allow the compressor to operateonly when outside ambient is 40° F. or warmer. See FIG.C15.To check the changeover thermostat, first verify the air temperatureat the capillary tube. If the temperatures are above45°F., continuity should be between terminals 2 to 3 andno continuity between terminals 2 to 1. For temperaturesbelow 40°F. , continuity should be between terminals 2 to 1and no continuity between terminals 2 to 3.Note: A defective changeover thermostat can keep thecompressor from operating in the COOL or HEAT PUMPmodes.FIG. C15C11. Remote SensorThe remote sensor is used with the Comfort Control Systemto monitor and control the temperature in the differentzones. Normally, a remote sensor is used for each unit orzone. A remote sensor is optional for Zone 1, or a singleunit installation. See FIG. C16.Ensure that the compressor is operational by:1. Placing mode switch to cool.2. Lower temperature setting to start compressor operation(approx. 2 min. time delay)3. Once compressor is operational, adjust setting up toshut down compressor system.Locate sensor attached to zone being tested. Using a hairdryer or other heat producing air device, GRADUALLY heatup the area surrounding the thermistor. Ensure that devicedoes not place excessive heat on plastic cover.If compressor system comes on, sensor is operational. Ifthe compressor does not come on, reverify connections atair conditioner. Ifthe system is still FIG. C16not operational, unplugsensor fromunit and verify itscable by checkingthe ohms. See FIG.C16 & 17.