Just looked at small cold room in a restaurant where the evaporator and expansion valve were changed about 4 months ago. When i visited the condenser fan motor had siezed, i changed it and tested ok. The next day i received a call to say the r.c.d. device was tripping when the unit was switched on, turned out the compressor had gone. I decided to change the condenser unit (ELECTROLUX MR 18 TB). I requested a price for 18cc h.b.p. r404a unit and was told by supplier that a cmx 18 l.b.p. unit would achieve a temperature of -3c. The room was run at +1c so i accepted this as it was considerably cheaper. I fitted it late on tonight and found that it was very slow coming down to temp. I left to go back and see how things are tomorrow as it was getting late. Any thoughts?!