Haier HSU18VCB HSU18VC7-W User Manual - Page 14

Troubleshooting Before asking for service, check the following first. Problem Cause or check points The system does not restart immediately. t t • r\s -----y, 0 e • When unit is stopped, it won't restart immediately until 3 minutes have elapsed to protect the system. • When power is interrupted, a time delay of 3 minutes will allow the system to equalize. to protect the air conditioner. Noise is heard Normal Performance C ' 0 ' inspection . , • During unit operation or at stop, a swishing or gurgling noise may be heard. During the first 2-3 minutes after unit start up , this noise is more noticeable. (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 temperature changes. •Air filter may be too dirty. Mist or steam are blown out. = . I Or - = • During COOL or DRY operation, indoor unit may blow out mist. This is condensation due to the sudden cooling of indoor air. Multiple check J Does not work at all. ,_ ,.7z._. = / • Is power plug inserted? • Is there a power failure? • Is fuse blown out? Poor cooling i (7a i /ri---- • o• o •C • Is the air filter dirty? Normally it should be cleaned every 15-30 days. • Are the inlet or outlet blocked ? Is temperature set correctly? • Are there some doors or windows left open? • Is there any direct sunlight through the window during the cooling operation?(Close curtains or blinds) • Are there other heat sources or too many people in the room during cooling operation? 14