the front seals leak when crank spins not stationary thats why we hp test um overnight if they hold nitro then leak is the cranks seal is gone if condensor or pipe gone it will just drop nitro...
AHRI Fundamentals of HVAC/R by Carter and David Skaves is what was required for us to use in school
had an issue with an hitatchi vrf- occasionally alarmed on hp failure- but all checked out ok, after a week of swapping hp switch,sensors,pcbs finally suspected the alarm relay- swapped and no...
Every day is a school day......every day we are all learning....Experience is the best qualification anyone can have. The certs are a bonus of course but what makes a kid who has just got there quals...



Had this on a mercury unit with a Carel unit retro fitted to it. When it was fitted one of 4 available HP I/O's was used for a fault from a fan speed controller. Took a while to figure it out....
Rhoss Chiller