- DL manuals
- Fedders
- Air Conditioner
- GWH18MC-D3DNA3A
- Service Manual
Fedders GWH18MC-D3DNA3A Service Manual
Summary of 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
2.1 unit specifications.....................................................................................................................3 2.2 operation characteristic curve.................................................................................................7 2.3 capacity variation ra...
Page 3: Summary And Features
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: 1.Safety Precautions
2 1.Safety precautions safety precautions important! This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently. Follow each installation or r...
Page 5: Specifications
3 2. Specifications 2.1 unit specifications specifications the above data is subject to change without notice. Please refer to the nameplate of the unit. Ti n u r o o d n i f o l e d o m fan motor speed (r/min) (sh/h/m/l) ) w ( r o t o m n a f f o t u p t u o ) w ( r e t a e h f o r e w o p t u p n ...
Page 6
4 the above data is subject to change without notice. Please refer to the nameplate of the unit. Specifications liquid pipe (mm) gas pipe (mm) height (m) length (m) outdoor unit model of outdoor unit compressor manufacturer/trademark compressor model compressor type l.R.A. (a) compressor rla(a) comp...
Page 7
5 specifications the above data is subject to change without notice. Please refer to the nameplate of the unit. Ti n u r o o d n i f o l e d o m fan motor speed (r/min) (sh/h/m/l) ) w ( r o t o m n a f f o t u p t u o ) w ( r e t a e h f o r e w o p t u p n i fan motor capacitor (μ ) f fan motor rla...
Page 8
6 the above data is subject to change without notice. Please refer to the nameplate of the unit. Specifications liquid pipe (mm) gas pipe (mm) height (m) length (m) outdoor unit connecti on pipe outer diameter max distance length (m) model of outdoor unit compressor manufacturer/trademark compressor...
Page 9
7 cooling heating 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 er r u c 11 10 9 8 7 6 5 4 3 2 1 0 compressor speed (rps) ) a( t n er r u c • conditions indoor : db26.7˚c/wb19.4˚c outdoor : db35˚c/wb23.9˚c indoor air f...
Page 10
8 specifications 2.3 capacity variation ratio according to temperature cooling heating 32 33 34 35 36 37 38 39 43 –15 –10 –5 0 5 7 10 40 41 42 100 105 95 90 85 80 75 70 65 60 55 50 outdoor temp. (˚c) ) %( oit ar yti c a p a c 110 100 90 80 70 60 50 40 outdoor temp. (˚c) ) %( oit ar yti c a p a c • c...
Page 11
9 2.5 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 high.
Page 12: 3. Construction Views
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 mc 06 > 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 c0 6> m c 0 6 > m c 0 0 2 > bolt nut wrench 370 920 1000 610 399 427 790 constrction views.
Page 15
13 4. Refrigerant system diagram cooling & 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 ) rot al u mu cc a- bu s ro ss er p mo c cooling heating.
Page 16: 5. Schematic Diagram
14 5. 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 unit..
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
23 6.3 description of each control operation function and control 1.Basic function of system 1 cooling mode 1.Under this mode, fan motor, swing will work under setting status, the temp. Range is 16-30 (61-86 fahrenheit scale) 2.Outdoor unit malfunction or unit stop running, indoor unit will keep ori...
Page 20
24 2. Display state of indoor indicators (1) state of indoor display board 1. When the unit is powered on, all patterns will be displayed and then only power indicator is on. When the unit is turned on with a remote controller, the operating indicator is on and operation mode which is set currently ...
Page 21
25 function and control (4) sleep function (5) timing function the main board integrates general timing and moment timing. Such two timing functions can be selected through a remote controller on which different functions are arranged. 1. General timing: timing start: timing start can be set when th...
Page 22
26 function and control (3) protecting treatments of thermo-bulb: 1.When the thermo-bulb is detected to be short-circuited continuously for 30 seconds: it is regarded that the temperature detected by the thermo-bulb is over-high (or unlimited), then the whole machine will exert corresponding safety ...
Page 23
27 function and control (2) dehumidifying mode 1. Conditions and processes of dehumidifying operations: same as the cooling mode; 2. The temperature setting range is: 16~30 ; (3) air-supplying mode 1. The compressor, outdoor fans and four-way valves are switched off; 2. The temperature setting range...
Page 24
28 function and control (3) 4-way valve control 1. The 4-way valve control under the modes of cooling, dehumidification and supplying air: closing; 2. The status of 4-way valve control under the heating mode: getting power; (1) 4-way valve power control under heating mode a. Starts the machine under...
Page 25
29 function and control 5. Power turn-off: if the t cooling overload power turn-off temperature ≤t outer pipe , then cooling overload protects machine stopping; if t outer pipe t cooling overload frequency-limited temperature and the compressor has been stopped working for 3 minutes, the machine sho...
Page 26
30 function and control , 5. Power turn-off: if the t power turn-off temperature during discharging ≤t discharge , you should discharge to protect machine stopping; if t discharge t limited frequency temperature during discharging and the compressor has been stopped for 3 minutes, the machine should...
Page 27
31 function and control if t frequency reducing temperature at normal speed of module ≤t module t frequency reducing temperature at high speed of module , you should adjust the compressor frequency by reducing 8hz/90s till the lower limit; after it was running 90s at the lower limit, if t frequency ...
Page 28
32 function and control 1.Over-high voltage protection for dc bus: if it found the dc bus voltage u dc ˚[u dc jiekuangchun protection] , turn off pfc and stop the compressor at once, and it shall show the dc over-high voltage failure; it should clear out the failure when the voltage dropped to u dc ...
Page 29: 7. Installation Manual
33 7. Installation manual installation manual installation installation 1. 2. Select a position where the condensing water can be easily drained out, and the place is easily connected for outdoor unit . 4. Can select the place where is strong enough to withstand the full weight and vibration of the ...
Page 30
34 installation manual safety requirements for electric appliances earthing requirements note: make sure that the live wire or neutral wire as well as the earth wire in the family power socket can not be wrong connected, there should be reliable and no short circuit in the diagram. Wrong connection ...
Page 31
35 installation manual m m 0 5 1 m m 5 5 φ m m 5 5 φ m m 0 5 1 Ø 5 5 install the rear panel 1.Always mount the rear panel horizontally. Due to the water tray of indoor unit has been adopted the both-way drainage design, the outlet of water tray should be adjusted slightly down when installing, that ...
Page 32
36 installation manual ● ● ● after tighten the screw, slight pull the wire and confirm whether is it firm or not. ● ● the cover plate must be fixed, and tighten the connection wire, if it is poor installed, that note: when connecting the electric wire if the wire length is not enough, please contact...
Page 33
37 installation manual installation of outdoor unit Ø air purging and leakage test condensate drainage of outdoor unit (no for cooling only) the condensate and defrosting water formd during heating in the outdoor unit can be properly discharged by drainage pipe . Installation method:set the drain co...
Page 34
38 8. Exploded views and parts list 230v 18k r410a indoor unit exploded views and parts list.
Page 35
39 exploded views and parts list the above data are subject to be changed without notice. Product code r e v u o l e d i u g 1 r e v o c w e r c s 2 y s s a - b u s r e tl i f 3 y s s a - b u s e s a c t n o r f 4 tr o p p u s r o t a r o p a v e 5 y s s a r o t a r o p a v e 6 )t e lt u o r i a ( e...
Page 36
40 230v 24k r410a indoor unit exploded views and parts list.
Page 37
41 the above data are subject to be changed without notice. Exploded views and parts list product code y s s a - b u s r e tl i f 1 y s s a e s a c t n o r f 2 y s s a r o t a r o p a v e 3 tr o p p u s r o t a r o p a v e 4 r e v u o l e d i u g 5 h s u b e li x a 6 7 mesh enclosure (air out )t e l...
Page 38
44 exploded views and parts list 230v 18k r410a outdoor unit.
Page 39
45 exploded views and parts list the above data are subject to be changed without notice. Part code gwh18mc-d3dna1a/o product code cb190w0120 1 fan motor 1501506302 1 2 electric box (fireproofing) 01413148 1 3 terminal board 42010255 1 4 capacitor cbb61（fan） 33010010 1 5 electric box 20113008 1 6 ra...
Page 40
48 exploded views and parts list 230v 24k r410a outdoor unit.
Page 41
49 exploded views and parts list the above data are subject to be changed without notice. Part code gwh24md-d3dna1a/o product code cb190w0140 1 fan motor 1501506205 1 2 electric box (fireproofing) 01413426 1 3 capacitor cbb61 33010011 1 4 electric box 20113008 1 5 radiator 49010008 1 6 main board 30...
Page 42: 9. Troubleshooting
50 9. Troubleshooting troubleshooting the breaker trips at once when it is set to "on". Measure insulation resistance to ground to see if there is any leakage. Trip of breaker or blow of fuse the breaker trips in few minutes when it is set to "on" check power supply circuit. Check if the plug is pro...
Page 43
51 troubleshooting improper set of temperature adjust set temperature if cooling (heating) load is proper check the forecasted load of cooling (heating) the refrigerant has leakage or is insufficient heck and fill the leakage, then vacuumize it and supplement the re- frigerant as required leakage be...
Page 44
52 troubleshooting the indoor fan motor is burned or breaks or has the heat protector malfunction. Replace the fan motor or the defective part. The built-in heat protector of the motor breaks frequently because the motor is abnormal. Replace the fan motor wrong connection make the correction connect...
Page 45
53 troubleshooting water leakage abnormal sound and shake drainage pipe blocked or broken change drainage pipe wrap of refrigerant pipe joint is not close enough. Re-wrap and make it tight. Fan of indoor unit contacts other parts. Adjust fan location. Foreign object in indoor unit take out the forei...
Page 46
54 troubleshooting 1rupdoo\gldjqrvhwurxeohvdffruglqjwrwkhwurxeohgldjqrvlvsurfhgxuhdvghvfulehgehorz5hihuwrwkhfkhfn srlqwvlqvhuylflqjzulwwhqrqwkhzlulqjgldjudpvdwwdfkhgwrwkhlqgrrurxwgrruxqlwv 1r 7urxeohvkrrwlqjsurfhgxuh &rqilupdwlrq -xgjhphqwe\)odvklqj/('ri,qgrru2xwgrru8qlw +rzwr&khfnvlpso\wkhpdlqsduw ...
Page 47
55 troubleshooting confirmation 1 confirmation of power supply confirm that the power breaker operates(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/...
Page 48
56 troubleshooting 4 e5 □ ■ ƿ □ 5 e6 □ □ □ ƿ 6 e8 ■ □ ■ ■ 7 h6 8 c5 9 f1 10 f2 11 f3 □ □ ƿ ■ 12 f4 □ □ ƿ □ 13 f5 □ □ ƿ ƿ 14 f6 ■ □ ƿ ƿ 15 f8 ■ ■ □ ■ 16 f9 ■ ■ □ □ 17 ph □ ■ □ ƿ $&ryhuordg surwhfwlrq ,qgrrudqgrxwgrruxqlwv frppxqlfdwlrqpdoixqfwlrq $qwlkljkwhps surwhfwlrq ,qgrruxqlwprwru qrihhgedfn -xp...
Page 49
57 troubleshooting 18 u5 □ ■ ■ 19 p5 □ □ □ 20 h1 21 h2 22 h3 □ □ 23 h4 24 h5 ■ 25 hc □ ■ is too high blink 11 times fan motor works. Heating: all will stop whole unit’s current testing malfunction compressor current overcurrent protection defrosting electrostatic dedust protection compressor overloa...
Page 50
58 troubleshooting 34 u3 □ ■ ■ ■ 35 pl □ ■ ■ □ 36 eu ■ ■ ■ ☆ 37 u7 ■ □ ☆ □ 38 u9 ■ ■ ☆ □ 39 fh ■ ■ ■ □ cooling, dehumidifying; compressor will stop, indoor fan motor works. Heating: all will stop cooling, dehumidifying; compressor will stop, indoor fan motor works. Heating: all will stop overload no...
Page 51
59 troubleshooting n y n y n y n y n y (1) capacitor cha r ge fault (fault with outdoor unit) (ap1 below refers to the out door control panel) use ac voltmeter to check if the voltage between terminal l and n on the wiring board is within 210vac~240vac. Main check points: if the reactor (l) is corre...
Page 52
58 troubleshooting 34 u3 □ ■ ■ ■ 35 pl □ ■ ■ □ 36 eu ■ ■ ■ ☆ 37 u7 ■ □ ☆ □ 38 u9 ■ ■ ☆ □ 39 fh ■ ■ ■ □ cooling, dehumidifying; compressor will stop, indoor fan motor works. Heating: all will stop cooling, dehumidifying; compressor will stop, indoor fan motor works. Heating: all will stop overload no...
Page 53
61 energize and switch on ipm protection occurs after the machine has run for a period of time? Use ac voltmeter to measure the voltage between terminal l and n on the wiring board xt) if the voltage between terminal l and n on wiring board xt is within 210vac~250vac? Check the supply voltage and re...
Page 54
62 ap1 end y n y n y n mainly detect: 3 high temperature and overload protection diagnosis (ap1 hereina fter refers outdoor unit) is outdoor ambient temperature in normal range? Are the outdoor and indoor fans operating normally? Is the heat dissipation environment inside and outside the unit is goo...
Page 55
63 y n y n n y y n mainly detect: whether the compressor wiring is connected correct? Is compressor broken? Is time for compressor stopping enough? (4) start-up failure (following ap1 for outdoor unit control board) power on the unit is stop time of the compressor longer than 3 minutes? Restart it u...
Page 56
64 mainly detect: whether the system pressure is too high? Whether the input voltage is too low? (5) out of step diagnosis for the compressor (ap1 hereinafter refers to the control board out of step occurs once the unit is powered on. Is stop time of the compressor longer than 3 minutes? Are the wir...
Page 57
65 (6)overload and air exhaust malfunction diagnosis (following ap1 for outdoor unit mainly detect: wether the pmv is connected well or not? Is pmv damaged? Is refrigerant leaked? 20 minutes after the complete unit is powered off is the terminal fa for the pmv connected correctly? Connect the wires ...
Page 58
66 y y n n y n n n n y y y 7 power factor correct or (pfc) fault (a fault of outdoor unit) (ap1 hereinafter refers to the control board of the outdoor unit) mainly detect: check if the reactor (l) of the outdoor unit and the pfc capacitor are broken the failure diagnosis process is as follows: start...
Page 59
67 (8) communication malfunction: (following ap1 for outdoor unit control board) mainly detect: is there any damage for the indoor unit mainboard communication circuit? Is communication circuit damaged? The flow chart for malfunction detect: detect the indoor and outdoor units connection wire and in...
Page 60
68 y y y y y n n n n (9) flow chart for outdoor communitcation circuit detecting: start measure voltage at the test 10 position as shown in the diagram with a voltmeter value jumping measure voltage at the test 15 position as shown in the diagram with a voltmeter value jumping measure voltage at the...
Page 61
69 ˄ć˅ ˄n¡˅ ˄ć˅ ˄n¡˅ ˄ć˅ ˄n¡˅ ˄ć˅ ˄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 ˄ć˅ ˄n¡˅ ˄ć˅ ˄n¡˅ ˄ć ˅ ˄n¡˅ ˄ć˅ ˄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 ˄ć˅ ˄n¡˅ ˄ć˅ ˄n¡˅ ˄ć˅ ˄n¡˅ ˄ć˅ ˄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: 10. Removal Procedure
72 10. Removal procedure 10.1 removal procedure of indoor unit removal procedure panel wiring cover plate filter guide louver 1 disassemble panel open the panel, pull the panel outward along the groove and then remove the panel. Twist off the screws on the wiring cover plate, separate the terminals ...
Page 65
73 removal procedure front case screw temperature sensor ground wire 4. Disassemble front case open the screw covers and twist off the screws used for fixing the panel sub-assy, then remove the front case. 5. Disassemble electric box cover twist off the screws on electric box cover, take out the tem...
Page 66
74 removal procedure pipe-pressing plate screw screw 7. Disassemble evaporator twist off the screws used for 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 e...
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
76 removal procedure 10.2 removal procedure of outdoor unit top cover cover handle grille temperature sensor 1. Disassemble top cover twist off the fastening screw used for fixing the handle, pull it downward and then remove the handle. Twist off the screws around the top cover, pull it upward and t...
Page 69
77 removal procedure axial flow blade clamp nut motor support tapping screw motor four-way valve electronic expansion valve 4. Disassemble axial flow blade loosen the tight nut with spanner and remove the nuts, spring washer, plain washer, then remove the axial flow blade forcibly. 5. Disassemble mo...
Page 70
78 removal procedure liquid valve bolt gas valve bolt of compressor 7.Disassemble the gas valve and liquid valve twist off the screws 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. Disass...
Page 71
79 removal procedure 10.3 removal procedure of outdoor unit top cover screw handle grille screw temperature sensor 1. Disassemble top cover, front side panel twist off the clamping screws used for fixing the handle with screwdriver, pull it downward forcibly and then remove the handle. Twist off the...
Page 72
80 removal procedure clamp nut axial flow blade motor support tapping screw motor four-way valve weld spot 4. Disassemble axial flow blade loosen the clamp nut with spanner, take out nuts, spring washer, plain washer and then remove the axial flow blade forcibly. 5. Disassemble motor and motor suppo...
Page 73
81 removal procedure gas valve bolt liquid valve bolt of compressor 7. Disassemble the gas valve and liquid valve twist off the screws 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 ...