Quote Originally Posted by syd View Post
Hi guys, i wonder if anyone could help with an issue i have with a Carrier water chiller R22 (model 30ran055 i think!). The unit has two circuits with two compressors on each circuit.

Now, the problem i have is that on start up, suction pressure on both circuits go straight down to a negative pressure. I know for a fact it is not short of refrigerant and it doesnt seem like there is a blockage as the discharge pressure doesn't go too high (180psi).

Also, both liquid line sight glasses seem to be full of oil.

Any advise would be greatly received, thank you
Hi check exv operation ,if fitted,
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