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VESSER GH18E, Service Manual, Page: 107 / 115

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VESSER GH18E Service Manual Download Page 107

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Steps

9.Remove motor support

motor support

Twist off the tapping screws fixingthe motor 
support, pull it upwardsand then remove the 
motor support.

Twist off the screws connecting isolation sheet 
and end plate of condenser and chassis, and 
then remove the isolation sheet.

11.Remove 4-way valve

10.Remove isolation sheet

isolation sheet

4-way valve

Unsolder the pipeline between compressor, 
condenser, gas and liquid valve, and then 
remove the 4-way valve. (note: release all 
refrigerant before unsoldering).

Procedure

Summary of Contents for GH18E

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Page 38: ...stops operation when reaching the temperature point in heating 6 2 Under this mode the temperature setting range is 16 30ć 7 Defrosting control heating mode 7 1 If it turns to defrosting time and it detected that the defrosting temperature is satisfied for 3mins successively the unit turns into defrosting process 7 2 Defrosting starting compressor stops operation and restart it up after 55s delaye...

Page 39: ...14 1 If 13A IAC current operation frequency of compressor may decrease or increase 14 2 If 17A IAC current the system will stop operation because of overcurrent the complete unit can resume operation only after the compressor stops for 3min 14 3 If the unit is stopped because of overcurrent for 6 times successively it can t resume operation automatically which can only be resumed by pressing ON OF...

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Page 42: ... At least 15cm At least 15cm At least 250cm Space to the wall S p a c e t o t h e o b s t r u c t i o n r o o l f e h t o t e c a p S Space to the obstruction Drainage pipe Space to the wall Space to the obstruction Space to the obstruction Space to the obstruction A t l e a s t 3 0 0 c m At least 50cm At least 200cm At least 30cm At least 30cm At least 50cm ...

Page 43: ...ng the indoor unit Make the bound pipes pass through the wall hole and then connect outdoor unit Neaten the pipes Vacuum pumping and leakage detection Check after installation and test operation Finish installation Note this flow is only for reference please find the more detailed installation steps in this section Select outdoor unit installation location Install the support of outdoor unit selec...

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Page 53: ...dthe controller loosened or poorly contacted Insert the temperature sensor tightly yes Is malfunction eliminated Is there short circuit due to trip over of the parts Make the parts upright yes Is malfunction eliminated Replace the mainboard with the same model End no no Is the temperature sensor normal according to the Resistance Table no Replace it with a temperature sensor with the same model no...

Page 54: ...function is eliminated Reinsert the wiring terminal of indoor fan It s the malfunction of main board Replace a new main board that is of the same model It s the malfunction of main board Replace a new main board that is of the same model Replace a new main board that is of the same model It s the malfunction of main board Then check whether the voltage between terminal 2 and terminal 3 of the moto...

Page 55: ...rd Is the jumper cap inserted correctly and tightly Replace the jumper cap with the same model End yes yes Assemble the jumper cap with the same model no Is malfunction eliminated no yes Insert the jumper cap tightly Is malfunction eliminated no no yes Is malfunction eliminated no yes Replace the mainboard with the same model 0DOIXQFWLRQ RI 3URWHFWLRQ RI XPSHU DS ...

Page 56: ...ion Main board matches with display board Main board of IDU matches with that of ODU Communication cord is damaged Replace IDU s main board Malfunction eliminated End Connect the line according to wiring diagram Match correctly according to product specification Replace communication cord Replace ODU s main board Malfunction eliminated Malfunction eliminated Malfunction eliminated yes yes yes yes ...

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Page 58: ...lt with the voltage testing circuit on control panel AP1 Replace the control panel AP1 Measure the AC voltage between terminalL andN on wiring board XT power supply Voltage within 210VAC 250VAC Shut down the power and repair the power supply to restore the range 210VAC 250VAC power on and restart the unit If the fault is eliminated Shut down the power and wait 20 mi nutes or use DC voltmeter to me...

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Page 60: ...to measure the voltage between the two ends of capacitor C2 until the voltage is lower than 20V Replace the capacitor C2 Then energize and start the unit Replace the control panel AP1 Take corrective actions according to Technical Service Manual and then energize and start the unit If there is any abnormality described above Replace the control panel AP1 If the connection between AP1 and COMP is u...

Page 61: ...LV SURFHVV 1 Check if fan terminal OFAN is connected well 2 Test if resistance value of any two terminals is less than 1k with ohmic meter If the indoor and outdoor fan work well After the unit de energized for 20min Replace control board AP1 If the radiating of outdoor and indoor unit is well Improve the radiating environment of unit Replace outdoor fan Y Replace fan capacitor C1 Anti high temper...

Page 62: ...pressor wire COMP UVW is well connected and connection sequence is correct Replace control board AP1 Replace the compressor If malfunction is removed If the stop time of compressor is more than 3min N If the stop time is not enough and the high and low pressure of system is not balance please start it after 3min Improve the connection situation of control board AP1 and compressor COMP connect it w...

Page 63: ...outdoor fan works normally If the stop time of compressor is more than 3min Synchronism after energize the unit and start it Connect wire well Synchronism occurred during operation Replace control board AP1 If the radiating of unit is well Remove malfunction Improve the radiating of unit clean heat exchanger and increase ventilation Replace fan capacitor C1 Replace outdoor fan Y N N N Y Y N Replac...

Page 64: ... with wiring diagram Replace EKV coil of electron expansion valve If the wiring terminal FA of electron expansion is well connected Remove malfunction The resistance value of first 4 l ead foot an d th e fifth lead foot is similar less than 100 After the unit de energized for 20min Remove malfunction Y N N N If the overload protector SAT is well connected N Under ambient temperature test the resis...

Page 65: ...o terminals Capacity is short circuit and replace it Y Re energize the unit and start it Cut the terminal of reactor test the resistance between two terminals of reactor with ohmic meter Replace the reactor Re energize the unit and start it Check the connection wire of reactor L of outdoor unit and PFC capacity If there is damaged short circuit Replace connection wire with circuit diagram Replace ...

Page 66: ...SURFHVV Start Check communication circuit of outdoor unit Problem of communication circuit Check built in wiring of indoor and outdoor unit Connection correct Malfunction of circuit is detected with control board AP1 voltage Check connection wire of indoor and outdoor unit with circuit diagram Check connection wire of indoor and outdoor unit with circuit diagram If the unit is operation normal bef...

Page 67: ...ltage meter Number jumping Outdoor unit malfunction Test voltage value with Test 13 position in diagram with voltage meter Number jumping Test voltage value with Test 11 position in diagram with voltage meter Number jumping Test voltage value with Test 12 position in diagram with voltage meter Y Y Y Y Number jumping The circuit of outdoor unit communication is normal Y N N N N End ...

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Page 85: ...RII DOO SRZHU VXSSOLHV DQG GLVFKDUJH WKH UHIULJHUDQW FRPSOHWHO EHIRUH UHPRYDO 1 Before disassembling the unit Before disassembling the unit 2 Remove filter Open the panel Loosen the clasps on filter push the filter inward and then pull it upward then the filter can be removed 1 2 3 Remove guide louver Remove the axial bushing of big guidelouver 1 axial bushing Steps Procedure ...

Page 86: ...bend thebig guide louver to remove it 2 3 Remove the axial bushing of small guide louver Remove the rotating shaft of small guide louver from the groove slightly bend the small guide louver to remove it 4 big guide louver axial bushing small guide louver 4 Remove panel 1 Loosen the clamps of the panel to remove the panel Steps Procedure ...

Page 87: ...l to remove the display 5 Remove front case 1 Remove the screws fixing electric box cover 2 to remove the electric box cover 2 electric box cover 2 screw 2 Remove the screws fixing front panel loosen the clamps to remove the front case screw clamp front case Steps Procedure ...

Page 88: ...ing connecting rod to remove the swing connecting rod 2 remove the swing fan blade 1 Remove the indoor tube temp sensor 2 Remove the screws fixing earth wire to remove the earth wire swing fan blade clamp clamp swing connecting rod 7 Remove electric box sub assy heat exchanger thermistor screw earth wire Steps Procedure ...

Page 89: ...move every wiring terminals and remove the electric box cover sub assy 1 Remove the screws fixing connection pipe clamp to remove the connection pipe clamp 7 Remove evaporator sub assy electric box cover sub assy screw electric box cover screw auxiliary piping pipe clamp screw Steps Procedure ...

Page 90: ...he screws fixing evaporator sub assy slightly regulate the tube to remove the evaporator sub assy 1 motor to remove the motor 2 to remove the motor 8 Remove cross fan blade and motor auxiliary piping evaporator sub assy up down swing motor left right swing motor Steps Procedure ...

Page 91: ...e the screws fixing motor clamp to remove the motor clamp 4 Remove the cross fan blade and motor 5 Remove the shafting bearing cushion rubber base 6 blade and motor and then remove the motor screw motor clamp bearing cushion rubber base cross fan blade motor Steps Procedure ...

Page 92: ...0DQXDO 1 Before disassembly of the unit Before disassembling the unit 2 Remove filter Open the panel Loosen the clasps on filter push the filter inward and then pull it upward then the filter can be removed 1 2 Steps Procedure air filter air filter panel hooks ...

Page 93: ...ic box cover Remove the screws fixing display on the panel to remove the display Along the groove fixing front panel slide the rotor shaft outward to remove the front panel screw Unscrew a screw of electric box cover with screwdriver Then take out the electric box cover Steps Procedure screw display panel electric box cover ...

Page 94: ... of horizontal louver to remove the axial bush 1 Remove Axial bush 2 1 Take out the front case to separate the front case with bottom assembly 2 6 Remove front case Remove the screw cover of front case unscrew the 8 screws of front case with screwdriver hook Axial sleeve Axial bush Steps Procedure front case ...

Page 95: ...the electric box cover to separate the electric box cover 2 2 3 screw earth wire Remove every wiring terminals and remove the screws fixing electric box to remove the electric box sub assy electric box Remove Temperature Sensor Twist off the earthing screw fixing the evaporator Steps Procedure temperature sensor electric box cover 2 ...

Page 96: ...fixing connection pipe clamp to remove the connection pipe clamp pipe clamp evaporator sub assy water tray Loosen the clasps connecting the water tray and chassis and then remove the water tray Remove the screws fixing evaporator sub assy slightly regulate the tube to remove the evaporator sub assy screw Steps Procedure ...

Page 97: ... and adjust the pipe line to the position as shown by the broken line 4 5 Remove the 2 screws of step motor with screwdriver and remove the step motor 1 9 Remove the cross flow louver and motor srews srews Lift up the evaporator and then remove the evaporator screws evaporator Steps Procedure ...

Page 98: ...24 QVWDOODWLRQ DQG 0DLQWHQDQFH 6HUYLFH 0DQXDO Remove screws fixing cross flow blade and motor 2 3 Pull out the plug of ring of bearing Remove the motor sub assy 4 Cross blow blade Fan motor Ring of Bearing Steps Procedure ...

Page 99: ...e and right side plate and then remove the big handle Remove the screw connecting the valve cover and right side plate and then remove the valve cover 2 Remove grille and outer case grille Remove the 4 screws connecting the grille and outer case and then remove the panel grille Remove the screws connecting the top cover with outer case right side plate and left side plate lift the top cover upward...

Page 100: ...with right side plate and left side plate and then remove the outer case Remove the screws connecting the right side plate with electric box assy valve support chassis and condenser side plate and then remove the right side plate Remove the screws connecting the left side plate with chassis and then remove the left side plate Steps Procedure left side plate outer case 3 Remove right left side plat...

Page 101: ...tor Remove the 2 screws connecting the motor support and chassis and then loosen the stopper to remove the motor support Remove the screws fixing the electric box sub assy loosen the wire bundle pull out the wiring terminals and then pull the electric box upwards to remove it Steps Procedure 5 Remove electric box 4 Remove axial flow blade axial flow fan motor support fan motor electric box ...

Page 102: ...ssis and then remove the isolation plate Unsolder the welding joints connecting the 4 way valve assy with capillary sub assy compressor and condenser remove the 4 way valve Note Before unsoldering the welding joint wrap the 4 way valve with a wet cloth completely to avoid damage to the valve caused by high temperature Steps Procedure 8 Remove 4 way valve assy 7 Remove isolation plate 6 Remove the ...

Page 103: ...ep the ports of discharge pipe and suction pipe from foreign objects Remove the screws connecting the support condenser and condenser assy and then remove the support condenser Remove the 2 screws fixing the condenser and chassis and then lift the condenser upwards to remove it Steps Procedure 10 Remove condenser sub assy 9 Remove compressor compressor support condenser chassis subassy sub assy ...

Page 104: ...ff the screws used for fixing the handle pull the handle up ward to remove it Remove the screws connecting the top panel with the front panel and left right side plate and then remove the top panel 3 Remove front side panel front side panel Loosen the screws connecting the front side panel and chassis Remove the front side panel Procedure ...

Page 105: ...hen remove the panel Twist off the screws connecting the grille and panel and then remove the grille 5 Remove right side plate right side plate Twist off the screws connecting the right side plate and chassis valve support and condenser and then remove the right side plate 6 Remove axial flow blade axial flow blade Twist off the nuts on blade with wrench and then remove the axial flow blade Proced...

Page 106: ...issors or pliers pull out the wiring terminal pull it upwards to remove the electric box electric box fireproofing Twist off the screws on electric box fireproofing with screwdriver and then remove the electric box fireproofing 8 Remove motor motor Twist off the tapping screws fixing the motor pull out the pin of leading wire for motor and then remove the motor Procedure ...

Page 107: ... remove the motor support Twist off the screws connecting isolation sheet and end plate of condenser and chassis and then remove the isolation sheet 11 Remove 4 way valve 10 Remove isolation sheet isolation sheet 4 way valve Unsolder the pipeline between compressor condenser gas and liquid valve and then remove the 4 way valve note release all refrigerant before unsoldering Procedure ...

Page 108: ...he soldering joint wrap the gas valve with wet cloth completely to avoid the damage to valve and release all refrigerant completely at first Unsolder the soldering joint between liquid valve and connection pipe of liquid valve and then remove the liquid valve Twist off the screws connecting valve support and chassis and then remove the valve support 14 Remove compressor compressor 13 Remove valve ...

Page 109: ... 15 Remove left side plate left side plate Twist off the screws connecting the left side plate and chassis with screwdriver and then remove the left side plate Pull it upwards to separate the chassis and condenser 16 Remove chassis and condenser chassis condenser Procedure ...

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Page 115: ...Vidicon Ltd Commercial Air Conditioners R410A Systems ...

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