Troubleshooting an Air Conditioning system by R D Holder Eng ~ Marine Notes

Troubleshooting an Air Conditioning system by R D Holder Eng and Roger D Holder MSME

Troubleshooting of an air conditioning system is a step by step procedure. I have found that a 4 step procedure is the best way to see how well a system is operating.
The 4 steps are:
1. Volts and Amps
2. Evaporator Superheat
3. Condensing Subcooling
4. Temperature difference of coils

Not one of these method alone can be used by itself to charge or troubleshoot an air conditioning system rather they must be used together to ensure efficiency and capacity.
Voltage and Amps
When working with voltages and Amps, one must consider the rated voltage and amp compared to the actual voltage and amp. Measure the starting amps along with the running amps of the compressor and all components of a system. When charging an air conditioner system the compressor amps changes due to the change in compression ratio.

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