sounds undercharged to me. How can ambient be 100 degF and liquid line at 84 degF? At 160 psig, the bubble point is 86 degF, so 2 degF of subcooling. I haven't looked for specs on your unit, due to lack of info, but the install manual will spec subcooling value for TXV metered boxes. Since you are moving less gaseous refrigerant, the subcooling value may not reach spec, but there should definitely be more than 2 degF when it's hot out. I smell something foul or amazing, I can't tell yet....
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