Do clean up flange probe-sample line-filter sample line-diaphragm pump-filter balston-check function humidity sensor and filter humidity from dirty of coal result function humidity sensor normal and filter good condition note replace filter sample line for L63 2K2 with spare unit. Clean up flange probe-probe-filter sample line-sample line tube-diaphragm pump-filter balston from dirty of dust also check function of humidity sensor and filter humidity result function sensor humidity normal and filter humidity normal ( AGUS & MUHAIMIN & ANDRI )