Dryer fault

[paul441]

Hi guys
Looking for spme advice please regarding a highross dryer.I have recently started working on dryers after mainly working on compressed air anyway i have fitted a new compressor on this dryer and charged it up to 2.3kg r407c but when i switched it on the dp wasnt coming down so put gauges on and my high was 9bar but my low shot round to retard on my gauge, compressor is running but would i be right thinking there is blockage as its not sucking in, is there anything to do before i have to reclaim gas and sweat off joints etc

I do have my 2078 handling and am taking f-gas next month

thanks

[nike123]

What is expansion device? Capillary or TXV?

[cadwaladr]

we have not overdone the solder joints,or left the bung in the inlet? you would not be the first and not the last.

[Brian_UK]

If the LP went to retard then I would check that you had your gauges on the correct ports.