Hi i have a problem with vrv 4 system.I have error code E9-49.Resistance on all EEVs are ok.I changed the main pcb on Slave 1 and Slave 2 unit.But no luck.System is working normaly for a few days then the same error appears.E9-49.Power supply is ok,local distributor did measurments and came back ok.
Please help.
Indor units: 11 duct units 3 cassettes
Outdoor units:
RXYQ16U7Y1B master and slave 1 unit
RXYQ12U7Y1B slave 2 unit