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P-h Chart for fault diagnosis part 2 (F4)

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P-h Chart for fault diagnosis part 2 (F4)

This second in the series of how P-h charts can be put to everyday use to diagnose faults and help improve the efficiency of installed refrigeration and air conditioning systems looks at loss of refrigerant and compressor efficiency.

Reading and interpreting a pressure-enthalpy chart (also referred to as P-h chart or diagram and as a Mollier diagram) is a key skill for diagnosing problems and maximising efficiency. It is a key element behind the F gas training that started earlier this year.

Efficiency is not just about saving the customer running costs—if a system is not working efficiently then it may not achieve its required output, it will use more power and is likely to fail prematurely.

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P-h Chart for fault diagnosis part 2 (F4)

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