Haier HPU-90CA03T3 Operation Manual page 10

Cabinet unit cooling unit
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Maintenance
After season maintenance
Let the unit run in Fan mode for half a day in a
fine weather to dry completely the unit inside.
Turn off the unit and pull out power plug.
There might be certain power consumption even
if unit is stopped.
Clean air filter and indoor unit, cover outdoor
unit after cleaning.
Before season maintenance
Check if there are obstacles at inlet
and outlet of indoor and outdoor unit,
whick will reduce unit efficiency.
Don't fail to attach air filter after making sure it is cleaned.
Dust will enter into unit causing damages or faults if it is running without air filter.
To protect compressor at start, please connect
external power supply to the unit 12 hrs prior
to starting. Also please keep the power supply
switch ON during the whole season.
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