Clean up probe-flange-filter sample line-sample line-filter balston-diaphragm pump from dirty of dust. Check humidity sensor and filter sensor result filter still function and normal. Found leakage at probe 463 2K1 observation suspected leakage, replace probe with spare probe, test leakage at work shop result ok, install at site. Test function insert and retract result ok ( RIZAL & EDI & MUHAIMIN & ANDRI & DADANG & ADI )