Troubleshooting - Mitsubishi Electric PAC-IF012B Technical Manual

12. Troubleshooting

A flowing water sound or occasional hissing
sound is heard.
Water does not heat or cool well.
Water or vapor is emitted from the outdoor unit.
■ These sounds can be heard when refrigerant is fl owing in the indoor
unit, refrigerant pipe or when the refrigerant is charging.
■ Clean the fi lter of water piping. (Flow is reduced when the fi lter is dirty
or clogged.)
■ Check the temperature adjustment and adjust the set temperature.
■ Make sure that there is plenty of space around the outdoor unit.
■ During cooling mode, water may form and drip from the cool pipes and
joints.
■ During heating mode, water may form and drip from the heat exchanger
of outdoor unit.
■ During defrosting mode, water on the heat exchanger of outdoor unit
evaporates and water vapor may be emitted.
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