Just a brain picking exercise - ( I have been working on Lieberts for nearly 30 years - iCOM trained , couple of AM/AG training sessions etc. )
Just comissioning a VS053WUA000266A ( Large screen iCOM, water cooled, 15 tons, 4 step Carlyle, upflow, 407c, rear return, blah , blah, blah )
1) System # 1 is defintiely overcharged - high subcooling, good superheat but running OK till I get to trim the charge.
2) System # 2 DOA - no refrigerant - snapped off cap tube in the spring at the base of the bellows - likely shipping vibration. Will get parts and fix later - - - -
3) This is where I am stumped, and I got on too late for Tech Support - When the unit has been running for 20+ minutes, ( 205 head, 84 psi suction @ 82*F R/A ) loaded 100% , I shut the unit off on the iCOM and the fan and compressor shut off in unison - LLsolenoid drops and that is it. If I re-start and let the unit run for another 20 minutes, pull the wire on the LLSV ( no hot gas either on this one ) the suction goes down to about 3 '' vacuum and shuts off.
Page 20 of the iCOM book states that the unit has a pump down ( like they have for years ) but I am not getting it in this case. It also states that this is set from the factory.
Anyone else run into this ??? Thanks for looking - - - -