Keep the area undisturbed
Keep children and pets away from the liquid. Do not sniff it closely, taste it, collect a sample, or use cleaners on it before getting guidance. Do not create flames or sparks in an area with a suspected release. Avoid operating local switches or plugging in a fan while the substance is unknown. If there is an ongoing release, a strong unexplained odor, or you cannot safely assess the area, leave and call emergency services from a safe location.
From outside the affected area, you can tell the technician which head is involved and which mode it was using. Use existing photos if you have them. Do not reenter solely to photograph a label or turn the equipment off. Let responders or the qualified technician manage isolation when safe access is uncertain.
Get an identification and repair plan
We would want the technician to identify the fluid and its source, determine whether the refrigeration system is involved, and assess whether the unit can be safely returned to service. Ask for the finding in writing, the repair needed, and the checks that support safe operation afterward. An oily appearance does not justify a diagnosis of a particular leak or failed part.
Share any recent installation, repair, or cleaning history. If material reached bedding, toys, carpet, or building surfaces, ask Poison Control about exposure concerns and an appropriate cleanup provider about removal. Equipment repair and room cleanup have different responsibilities; confirm who will handle each before using the room again.
Your next step: Keep the room unused until the source and exposure concerns are addressed. Contact emergency or Poison Control help as appropriate, then a qualified ductless technician for urgent investigation.