Fedders GWH18MC-D3DNA3A Service Manual Download Page 1

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Service Manual

MODEL :

(Refrigerant R-410A)

BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

GWH18MC-D3DNA3A
GWH24MD-D3DNA3A

ONLY FOR AUTHORIZED SERVICE PERSONNEL.

Summary of Contents for GWH18MC-D3DNA3A

Page 1: ...Service Manual MODEL Refrigerant R 410A BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL GWH18MC D3DNA3A GWH24MD D3DNA3A ONLY FOR AUTHORIZED SERVICE PERSONNEL...

Page 2: ...t 10 3 2 Outdo or Unit 11 5 1 Electrical wiring 14 5 2 Printed Circuit Board 15 6 1 Remote Control Operations 17 6 2 Changing batteries and notice 21 6 3 Description of each control operation 23 10 1...

Page 3: ...1 Summary and features Indoor Unit Outdoor Unit Remote control window YB1FAF Summary and features GWH18MC D3DNA3A GWH24MD D3DNA3A GWH18MC D3DNA1A O GWH24MD D3DNA1A O...

Page 4: ...of snow leaves or rubbish The unit should be installed according to the instructions in order to minimize the risk of damage from earthquakes typhoons or strong winds When the refrigerant touches the...

Page 5: ...imension of Package L W H mm g k t h g i e W s s o r G t h g i e W t e N Model Function Product Code Rated Voltage Frequency Hz Total Capacity W Standard Low High Total Capacity Btu h Standard Low Hig...

Page 6: ...frosting Method Climate Type Isolation Moisture Protection Permissible Excessive Operating Pressure for the Discharge Side MPa Permissible Excessive Operating Pressure for the Suction Side MPa Sound P...

Page 7: ...s s a l C y g r e n E h l e m u l o V g n i y f i d i m u h e D W W P O C R E E A t n e r r u C d e t a R Air Flow Volume m3 h SH H M L Power Input W Standard Low High W t u p n I d e t a R Total Capa...

Page 8: ...tor F Air Flow Volume of Outdoor Unit m3 h Fan Type Piece Fan Diameter mm Defrosting Method Climate Type Isolation Moisture Protection Permissible Excessive Operating Pressure for the Discharge Side M...

Page 9: ...ipe length 7 6m 220V 230V 240V 220V 230V 240V 0 10 20 30 40 50 60 70 90 0 10 20 30 40 50 60 70 80 90 100 120 110 80 11 10 9 8 7 6 5 4 3 2 1 0 Compressor speed rps A t n e r r u C 11 10 9 8 7 6 5 4 3 2...

Page 10: ...Cooling Heating Standard pressure Indoor Outdoor P MPa T1 C T2 C 18K 0 9 to 1 1 12 to 14 41 to 43 High High 62 24K 0 8 to 1 0 10 to 12 43 to 45 High High 78 Outdoor fan mode Compresso r revolution rp...

Page 11: ...5 Noise criteria curve tables for both models 50 40 30 Indoor side noise when blowing Outdoor side noise Indoor fan motor rotating speed Compressor frequency Hz Specifications Low Middle High Super H...

Page 12: ...10 3 Construction Views 3 1 Indoor Unit Constrction views Tube exit Air inlet Right Left Ceiling W D H MODEL W H D 18K 940 298 200 24K 1008 315 219 18K 24K...

Page 13: ...11 3 2 Outdoor Unit 18K Constrction views 60cm m c 0 6 m c 0 6 m c 0 0 2 Bolt Nut Wrench 340 890 700 963 560 368 396...

Page 14: ...12 24K 60cm m c 0 6 m c 0 6 m c 0 0 2 Bolt Nut Wrench 370 920 1000 610 399 427 790 Constrction views...

Page 15: ...Heating Models Refrigerant System Diagram 2 Way valve Strainer Strainer Strainer 3 Way valve Muffler 4 Way valve Expansion valve Heat exchanger INDOOR Heat exchanger OUTDOOR r o t a l u m u c c a b u...

Page 16: ...Schematic Diagram 5 1 Electrical wiring Schematic Diagram Models GWH18MC D3DNA3A GWH24MD D3DNA3A These circuit diagrams are subject to change without notice please refer to the one supplied with the...

Page 17: ...15 5 2 Printed Circuit Board TOP VIEW BOTTOM VIEW Schematic Diagram...

Page 18: ...16 TOP VIEW BOTTOM VIEW Schematic Diagram...

Page 19: ...hen unit is stop running and indoor fan motor turns on blowing heat will act 3 Protection function under heating mode compressor will stop to run due to malfunction happened indoor fan motor will blow...

Page 20: ...e Note in the case that the unit is switched off with the remote controller or the compressor is switched on again failure display waiting time 200s shall be cleared Frequency limitation and reduction...

Page 21: ...What will be memorized includes modes up and down wind blow light preset temperature preset wind speed general timing no memory for moment timing and Fahrenheit Celsius degree When the unit is powere...

Page 22: ...rmo bulb When conditions a and b are satisfied the outdoor exhaust temperature thermo bulb is judged not to be connected into place the mainboard of outer units will display failure of the outdoor exh...

Page 23: ...ogic 1 Compressor Control Start the compressor after starting cooling heating dehumidifying operations and the outer fans start for 5s When the machine is shutdown in safety stops and when switching t...

Page 24: ...If the T inner pipe T frozen preventing power turn off temperature then frozen preventing protect to stop the machine If T frozen preventing frequency limited temperature T inner pipe and the compres...

Page 25: ...ucing temperature at normal speed T outer pipe then Cooling overload protects machine stopping 4 Power turn off If the T heating overload power turn off temperature T inner pipe then overload protects...

Page 26: ...0 minutes 7 Communication fault When you have not received any correct signal from the inner machine in three minutes the machine will stop for communication fault When you have not received any corre...

Page 27: ...unning process of compressor you could measure the phase current of the compressor and control it according to the following steps 1 Frequency limited If I Limited frequency phase current I Phase curr...

Page 28: ...te 16 PFC Protection 1 After start up the PFC it should detect the protection signal of PFC immediately under the condition of PFC protection it should turn off the PFC and compressor at one time 2 It...

Page 29: ...Center in the local area 7 8 9 Important Notices Basic Requirements For Installation Position Install in the following place may cause malfunction If it is unavoidable contact with service center plea...

Page 30: ...e cut off and be fix it by screw otherwise it would cause electric shock 3 The earth resistance should accord to the National Criterion 4 The user power must offer the reliable earthing terminal Pleas...

Page 31: ...e into the hole to prevent the connection piping and wiring from being damaged when passing through the hole Install the water drainage pipe 1 For well draining the drain hose should be placed at a do...

Page 32: ...off the tailings 1 and tailings 2 when routing both the wiring and piping Take out the piping from body case wrap the piping electric wire water pipe with tape and pull them through the piping hole As...

Page 33: ...th cord anchorage for cooling and heating unit use the cord anchorage to fix the power connection cable and the signal control wire Ensure wire has been fixed well Install the handle 5 1 0 10 pa 76cmH...

Page 34: ...38 8 Exploded Views and Parts List 230V 18K R410A Indoor Unit Exploded Views and Parts list...

Page 35: ...a n i m r e T 2 3 1 r e v o C x o B c i r t c e l E 3 3 x o B c i r t c e l E f o r e v o c d l e i h S 4 3 r e l l o r t n o C e t o m e R 5 3 2 r e v o C x o B c i r t c e l E 6 3 h s u B e l i x A...

Page 36: ...40 230V 24K R410A Indoor Unit Exploded Views and Parts list...

Page 37: ...o s n e S e b u T 1 3 1 r e v o C x o B c i r t c e l E 2 3 x o B c i r t c e l E f o r e v o c d l e i h S 3 3 r e l l o r t n o C e t o m e R 4 3 2 r e v o C x o B c i r t c e l E 5 3 r e v o C w e...

Page 38: ...44 Exploded Views and Parts list 230V 18K R410A Outdoor Unit...

Page 39: ...Clapboard Sub Assy 01232902 1 17 Condenser Assy 01113386 1 18 Front Grill 01473049 1 19 Wiring clamp 26115004 1 20 Temperature Sensor 3900030901 1 21 Capacitor CBB65 33000065 1 22 Capacitor Clamp sub...

Page 40: ...48 Exploded Views and Parts list 230V 24K R410A Outdoor Unit...

Page 41: ...16 Condenser Assy 01113446 1 17 Front Grill 01473050 1 18 Wiring clamp 26115004 1 19 Temperature Sensor 3900030901 1 20 Reactor 43130021 1 21 Capacitor CBB65 33000039 1 22 Right Side Plate 0130504402...

Page 42: ...he remote startup has no response The remote controller does not receive signals after it is powered the buzzer will sound unless it has malfunction The circuit or the part of the air conditioner has...

Page 43: ...he thick and thin pipes is good Heat insulation must also be provided for the joint andthe exposed part of the copper pipe Block of outdoor heat ex changer Clean the dust accumulated on the surface of...

Page 44: ...unning capacitor of compressor Replace the capacitor The voltage is too low or too high Manostat is recommended Wrong wire connection Connect the circuit diagram correctly When cooling or heating outd...

Page 45: ...screws Touch of pipeline of outdoor unit Separate the touching pipeline Touch of inner plates Louver of outdoor unit is touching outer case Abnormal sound inside compressor Change compressor Adjust l...

Page 46: ...RQWUROOHU LQYHUWHU 7KHUHIRUH LI WKH SRZHU VXSSO LV WXUQHG RII FKDUJH FKDUJLQJ YROWDJH 9 WR 9 UHPDLQV DQG GLVFKDUJLQJ WDNHV D ORW RI WLPH IWHU WXUQLQJ RII WKH SRZHU VRXUFH LI WRXFKLQJ WKH FKDUJLQJ VHFW...

Page 47: ...rates ON normally 2 Confirmation of Power Voltage Confirm that power voltage is AC 220 230 240 10 If power voltage is not in this range the unit may not operate normally 2 Flashing LED of Indoor Outdo...

Page 48: ...PRWRU ZLOO ZRUN HDW DOO ZLOO VWRS RROLQJ GHKXPLGLI LQJ FRPSUHVVRU ZLOO VWRS LQGRRU IDQ PRWRU ZLOO ZRUN HDW DOO ZLOO VWRS RROLQJ GHKXPLGLI LQJ DIWHU UXQQLQJ IRU PLQV ODWHU WKH FRPSUHVVRU ZLOO VWRS WR U...

Page 49: ...l will stop running Cooling dehumidifying compressor stops running indoor fan motor works Heating all will stop running Cooling dehumidifying compressor stops running indoor fan motor works Heating al...

Page 50: ...lace the outdoor control board AP1 Indoor unit air return is poor or fan speed is too low 1 Power supply voltage is lower than AC175V 2 Wire terminal 4V loosen or wire break 3 4V damaged replace 4V Wh...

Page 51: ...ge testing circuit on control panel AP1 Replace the control panel AP1 Measure the AC voltage between terminal L and N on wiring board XT power supply Voltage within 210VAC 250VAC Shut down the power a...

Page 52: ...Replace the outdoor control board AP1 Indoor unit air return is poor or fan speed is too low 1 Power supply voltage is lower than AC175V 2 Wire terminal 4V loosen or wire break 3 4V damaged replace 4...

Page 53: ...Then Restart the unit Remove the wires on the two ends of capacitor C2 Then use capacitance meter to measure the capacitor C2 Verify as per the Parameters Sheet Stop the unit and disconnect the power...

Page 54: ...than 53 20 minutes after the complete unit is powered off Is heat dissipation of the indoor unit and outdoor unit abnormal Normal protection please operate it after the outdoor ambient temperature is...

Page 55: ...or outdoor unit control board Power on the unit Is stop time of the compressor longer than 3 minutes Restart it up after 3 minutes Does startup fail Are the wires for the compressor connected correctl...

Page 56: ...tion sequence right Is the connection made in clockwise direction Connect the wires correctly Replace the control panel AP1 If the fault is eliminated Replace the compressor End Out of step occurs in...

Page 57: ...te unit is powered off Is the terminal FA for the PMV connected correctly Connect the wires correctly Resistances between the first four pins close to the terminal hole and the fifth pin are almost th...

Page 58: ...circuit Replace it as per the wiring diagram and reconnect the wires If the fault is eliminated Remove the PFC capacitor and measure resistance between the two terminals Is the resistance around zero...

Page 59: ...perate normally before the failure occurs The AP1 voltage detection circuit is at fault Check wiring inside of the indoor and outdoor units Are wires broken Check the communication circuit of the outd...

Page 60: ...asure voltage at the Test 15 position as shown in the diagram with a voltmeter Value jumping Measure voltage at the Test 11 position as shown in the diagram with a voltmeter Value jumping Measure volt...

Page 61: ...69 N N N N Temp Resistance Temp Temp Resistance Temp Resistance Resistance Appendix 1 form for indoor outdoor unit s ambient sensor numerical value of resistance Troubleshooting...

Page 62: ...70 N N N N Temp Resistance Temp Temp Temp Resistance Resistance Resistance Appendix 2 form for indoor outdoor unit s tube temperature sensor numerical value of resistance Troubleshooting...

Page 63: ...71 N N N N Temp Resistance Temp Temp Temp Resistance Resistance Resistance Appendix 3 form for indoor outdoor unit s air exhaust temperature sensor numerical value of resistance Troubleshooting...

Page 64: ...d along the groove and then remove the panel Twist off the screws on the wiring cover plate separate the terminals and the remove the wiring cover plate 2 Disassemble filter Push the filter inward and...

Page 65: ...he front case 5 Disassemble electric box cover Twist off the screws on electric box cover take out the temperature sensor and then remove the electric box 6 Disassemble electric box Disassemble the gr...

Page 66: ...fixing the pipe pressing plate and then remove the pipe pressing plate Twist off the screws at the right and left sides of evaporator take out the evaporator by hand and let the clasps of end plate o...

Page 67: ...75 screw 8 Disassemble motor Twist off the screws used for fixing the press plate of generator and then remove the motor...

Page 68: ...ws around the top cover pull it upward and then remove the top cover 2 Disassemble grille and right side plate Twist off the screw around the grille and then remove the grille Twist off the screws bet...

Page 69: ...Disassemble motor and motor support Twist off the clamping screws take out the motor twist off the screws used for fixing the motor support pull it upward and then remove the motor support 6 Disassemb...

Page 70: ...used for fixing the gas valve and liquid valve unsolder the spot weld between gas valve and return air pipe and then remove the gas valve and liquid valve 8 Disassemble compressor Loosen the nuts of c...

Page 71: ...cover pull it upward and then remove the top cover Twist off the screws around the front side panel and then remove the front side plate 2 Disassemble grille and right side plate Twist off the screws...

Page 72: ...her plain washer and then remove the axial flow blade forcibly 5 Disassemble motor and motor support Twist off the fixing screws and then take out the motor Twist oft the screws used for fixing the mo...

Page 73: ...used for the gas valve and liquid valve unsolder the spot weld between gas valve and return air pipe and then remove the gas valve and liquid valve 8 Disassemble compressor Loosen the nuts of compres...

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