Haier HSU18VCK Service Manual

Also see for HSU18VCK: Installation manual Service manual

1. If the fuse on PC board is broken please change it with the type ofT. 3.15A/250V (indoor unit), 25A/250V(outdoor unit).2. The wiring method should be in line with the local wiring standard.3. After installation, the power plug should be easily reached.4. A breaker should be incorporated into fixed wiring. The breaker should beall-pole switch.Outdoor unitInstall according to Drawing for the installation of indoor and outdoor units●and the bending radius should be 30(1 1/6) to 40 mm(1 4/7) or longer.Connecting the pipe of gas side first makes working easier.●The connection pipe is specialized for R410A.●Installation of Outdoor UnitHalf union Flare nutTorque wrenchThe standard pipe length is 7m(27 9/16). If it is over 7m(27 9/16), the function ofthe unit will be affected. If the pipe has to be lengthened, the refrigerant shouldbe charged, according to 50 g /m(0.045oz/inch). But the charge of refrigerant mustbe conducted by professional air conditioner servicer. Before adding additionalrefrigerant,perform air purging from the refrigerant pipes and indoor unit using a vacuumpump,thenSpannerForced fastening without careful centering maydamage the threads and cause a leakage of gas.Pipe Diameter(ǿ) Fastening torqueLiquid side6.35mm(1/4") 18N.mLiquid/Gas side9.52mm(3/8") 42 N.mGas side 12.7mm(1/2") 55N.mGas side 15.88mm(5/8") 60 N.m1Connection of pipes2charge additional refrigerant.Outdoor unitIndoor unitABOutdoor unitIndoor unitABABOutdoor unitIndoor unitOil trapCAUTIONMax.Elevation: Amax=15 m●In case the elevation A is more●than 5m, oil trap shoud beinstalled every 5~7mMax. Length: Bmax= 25m●In case the pipe length B is●more than 10m, the refrigerantshould be charged, accordingto 50 g/m.Connection3If the drain-elbow is used,● please attach it as figure. (Note:Only for heat pump unit.)Detach the service port’s cap of1. 3-way valve, the valve rod’s cap for 2-way valveand 3-way’s, connect the service port into the projection of charge hose (Iow)for gaugemanifold. Then connect the projection of charge hose (center) for gau-gemanifold into vacuum pump.Open the handle at Iow in2. gaugemanifold, operate vacuum pump. If the scale-moves of gause (Iow) reach vacuum condition in a moment, check 1. again.3. (76 cm Hg) at Iow pressure side. After the completion of vacuuming, close thehandle ‘Lo’ in gaugemanifold and stop the operation of the vacuum pump. Checkcondition of the scale and hold it for 1-2min. If the scale-moves back in spite oftightening, make flaring work again, the return to the beginning of 3 .Attaching Drain-Elbow4Purging Method:To use vacuum pump5Open the valve rod for the 2-way valve counterclockwise to 90 degrees.4.After 6 seconds, close the 2-way valve and make the inspection of gas leakage.●●●●●●Take off the panel(top), by removing the 5 screws.Remove the plugs on the conduit plate.Temporarily mount the conduit tubes on the conduit plate.Connect both the power supply and unit wire harness tothe corresponding terminals on the terminal board.Ground the unit in accordance with local codes.Allow several extra inches of wire for making wiringconnections.Use lock nuts to secure conduit tubes.●To bend a pipe, be careful not to crush the pipe,Ensure that on dirt or debris enters the pipe.Vacuum for over 15min. And check the gauge which should read -0.1MPaHSU24VCK-W Power cable: 2wire with ground 12AWGHSU18VCK-W Power cable: 2wire with ground 12AWGHSU18VCK-SMDomestic air conditioner36