Mitsubishi Electric Mr. SLIM PKA-M KA Series Operation Manual page 13

6. Care and Cleaning
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Cleaning the indoor unit
• Wipe the outside of the unit with a clean, dry, soft cloth.
• When dirt stands out, wash it with kitchen neutral detergent diluted
with lukewarm water to the specified concentration, then wipe off the
detergent with a damp towel.
Caution:
Never use gasoline, benzene, thinner, scouring powder or any type
of non-neutral detergent, as these substances may damage the
unit's case.
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