HMC 1000 newer version. Troubleshooting this fault has been tricky. RCD redundancy fault. This elevator was shut down for 2 years. This elevator just needed some TLC and an inspection. Nothing was done to the controller or hydro system. Ran great for a month and this fault started.
CD relay has been swapped. Operates as it should. When a call is registered up or down the car will travel slightly then fault, back to normal then fault, intermittently. If the car doesn't make to the landing motor timer faults. Inspection seems to override this this issue. ( maybe it did RCD fault during inspection but definitely not like Normal, I don't recall this comment 100%)
one observation: When I first arrived next day after shutting down the car it took several call with no issue. Almost like things got warmed up and the fault started happening and got worse. Door close LED stays on during travel. Safety Circuit LED goes off during travel when RCD fault occurs. CD relay stays picked during travel and goes off when the car door opens as it should.
