====== Cooling maintenance ======

===== Cooled doors =====

==== Per year ====

­Check if flux is cold after doors. ­Use thermal camera to check doors temperature.

===== Encountered problems and solutions ===== 

==== Cooled doors ====
­-> Out air flux is not cold.
  * Use thermal camera to ensure and compare with other doors.
  * Inspect water arrival and departure pressure if possible.
  * Check water quality and PH.
  * Determine cooled door heat exchanger material and inspect if galvanic corrosion is not occurring.
  * If blocked, dismount door and purge it. Have a special look on solid particles removed: color and aspect are important indicators to identify problem and prevent future fill.
­-> Condensation occur on heat exchanger surface
  * Check water temperature and air temperature/humidity, report them in humid air chart and check, dew point is probably reached.

==== Humidifier ====
­-> Humidifier is continuously running, or often running (causing electricity, water and maintenance costs)
  * Check room humidity with a different probe than the one dedicated.
  * Check room humidity regulation.
  * Check room air position on humid air chart, and check it doesn’t reach condensation point.
  * Check room sealing.
­-> Humidifier is always/often asking for maintenance
  * See Humidifier is continuously running, or often running.
  * Check inlet water quality.
  * Have the equipment checked by a professional.

==== Air handling unit ====
­-> Condensation occur on heat exchanger surface
  * Check water temperature and air temperature/humidity, report them in humid air chart and check, dew point is probably reached.
­-> Compressor is used even with cold water supply
  * Check water valves are opened.
  * Check if probes values are coherent.
  * Check regulation
  * If air temperature regulation is too low, unit may use compressor to respond to this high cooling demand.
  * If humidity in room is too high, unit will condensate only and not lower temperature (i.e. high load). 
  * Check internal pipes are not blocked by a fill.