How to check step by step Refrigerant Circuit Problems part 2

Refrigerant Circuit ProblemsSystem Condition 4 1. Low pressure gauge reading is below normal. For normal operating pressures, refer to Table 1. 2. High pressure gauge reading is normal to the below normal range. For normal operating pressures, refer to Table 1. Note: Ambient temperature is above 21°C (70°F). 3. The temperature of the air flow from the evaporator is partially cool. 4. The high side liquid line or the...

»»  read more

How to Check step by step Refrigerant Circuit Problems part 1

Refrigerant Circuit ProblemsThere is no or only little cool temperature to the air flow from the evaporator.System Condition 1 1. Low pressure gauge reading is below normal. For normal operating pressures, refer to Table 1. 2. High pressure gauge reading is below normal. For normal operating pressures, refer to Table 1. Note: Ambient...

»»  read more

Due Air Conditioning System Troubleshooting

Heating and Air Conditioning System Troubleshooting Refrigerant Quick-Check Procedure for R-134a Expansion Valve And Orifice Tube SystemsNote: This procedure does not call for the installation of the manifold gauge set. The procedure should be used only as an indication of the actual system condition. For the detailed troubleshooting procedures, refer to the "Problem Solving Procedure" section.Note: In order to use this procedure,...

»»  read more

Due Inspection Air Conditioning System

Performance Checks for the Air Conditioning SystemA performance check of the air conditioning system must be made with a manifold gauge set. The manifold gauge set must be connected to the service ports on the compressor.Note: Before you conduct a performance check, refer to the Service Manual, SENR5664, "Visual Inspection" section.Refer to the Service Manual, SENR5664, "Machine Preparation for Troubleshooting" section before...

»»  read more

How to Adjust Thermostat

Systems OperationAir Conditioning and Heating R-134a for All Caterpillar ProductsHeating and Air Conditioning Control SystemAdjustable ThermostatAn adjustable thermostat contains two temperature control knobs. The temperature control knob for the air conditioning system is connected to an adjustable thermostat. A thermostat is a switch. Changes...

»»  read more