Haier HPU-16CB03 User Manual - Page 20

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 POWER SOFT SWING SET DAMP TEMP ON OFF 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. Trouble shooting Followings are not problems Sound of water flowings are not problems. Sound of cracking is heard. Smells are generated. During unit start and operation or at stop, a swishing or gurgling noise may be heard. This noise is generated by refrigerant flowing in the system. During unit operation, a cracking noise may be heard. This noise is generated by the casing expanding or shrinking because of temperatuer changes. This is because the system circulates smells from the interior air such as the smell of cigarettes or the painting on the unit. During operation, white fog or steam POWER SOFT SWING SET DAMP TEMP comes out of indoor unit. ON OFF When unit is running at places like restaurant where dense edible oil fumeis always exist, this will happen. In cooling operation, unit switches to fan operation. To prevent frost from accumulating on indoor heat exchanger, unit will switch to fan operation for a while then resume cooling operation. 18