Midea M2OE-14HFN1-Q User manual

SERVICE MANUAL
MIDEA AIRCONDITIONER
SUPER DC INVERTER MULTI TYPE
OUTDOOR UNITS
M2OE-14HFN1-Q
M2OF-18HFN1-Q
M3OE-21HFN1-Q
M3OE-27HFN1-Q
M4OE-28HFN1-Q
M4OB-36HFN1-Q
M5OE-42HFN1-Q
DM16-01.01.11-01en

Service manual DM16-01.01.11-01en
2 Multi DC inverter R410A. Outdoor unit
CONTENTS
1. GENERAL INFORMATION OF OUTDOOR UNITS....................................................................3
2. FEATURES...........................................................................................................................................4
3. SPECIFICATION................................................................................................................................5
4. DIMENSIONS....................................................................................................................................10
5. REFRIGERATION CYCLE DIAGRAM........................................................................................11
6. WIRING DIAGRAM.........................................................................................................................13
7. INDOOR UNITS COMBINATION.................................................................................................16
8. SOUND LEVELS...............................................................................................................................18
9. INSTALLATION DETAILS.............................................................................................................19
10. ELECTRONIC CONTROL FUNCTION .....................................................................................29
11. TROUBLESHOOTING ..................................................................................................................34

DM16-01.01.11-01en Service manual
Multi DC inverter R410A. Outdoor unit 3
1. General information of Outdoor Units
Model name Dimension (mm)
M2OE‐14HFN1‐Q800x333x554
M2OF‐18HFN1‐Q800x333x554
M3OE‐21HFN1‐Q845x363x702
M3OE‐27HFN1‐Q845x363x702
M4OE‐28HFN1‐Q946x410x810
M4OB‐36HFN1‐Q946x410x810
M5OE‐42HFN1‐Q946x410x810

Service manual DM16-01.01.11-01en
4 Multi DC inverter R410A. Outdoor unit
2. Features
The hydrophilic fin can improve the heating efficiency at operation mode.
It protects the valves and prevents water from dripping.
4 way valve control
It is only operated in the heating operation mode except defrosting operation.
Outdoor unit
Power relay control
Hydrophilic aluminum fin
Anti-rust cabinet
Valve protection cover
Low noise air flow system
Discharge pipe temperature protection

DM16-01.01.11-01en Service manual
Multi DC inverter R410A. Outdoor unit 5
3. Specification
Outdoor Model M2OE-14HFN1-Q M2OF-18HFN1-Q
Indoor unit combination Single Double Single Double
Power supply V-ph-Hz 220-240V- 50Hz, 1Ph 220-240V- 50Hz, 1Ph
Cooling
Capacity Btu/h 7000-14000 14000 7000-18000 18000
Input W 660-1250 1200 650-1600 1643
Rated current A 2.9-5.4 5,2 2.8-7.0 7,1
EER W/W / 3,30 / 3,21
Heating
Capacity Btu/h 8000-15000 15000 7000-19000 19000
Input W 620-1280 1160 542-1596 1543
Rated current A 2.7-5.6 5 2.3-6.9 6,7
COP W/W / 3,80 / 3,61
Max. input consumption W 2000 2600
Max. input current A 11 14
Compressor
Model ASN108D22UEZ ASM135D23UFZ
Type ROTARY ROTARY
Brand GMCC GMCC
Capacity Btu/h 10987 13836
Input W 825 1035
Rated current(RLA) A 5,8 7.32
Locked rotor Amp(LRA) A / ----
Thermal protector position / ----
Capacitor μF / ----
Refrigerant oil ml ESTER OIL VG74 370 ESTER OIL VG74/450
Outdoor fan
motor
New Model ZKFN-40-8-1L ZKFN-40-8-1L
Model
Qty 40(Output) 40(Output)
Output W / /
Capacitor μF / /
Speed(Hi/Med/Lo) r/min 810 810
Outdoor coil
Number of rows 1 2
Tube pitch(a)* row pitch(b) mm 21x13.37 25.4x22
Fin spacing mm 1.2 1.4
Fin type Hydrophilic aluminium Hydrophilic aluminium
Tube outside dia.and type mm Φ7,innergroove tube Φ9.52,innergroove tube
Coil length * height * width mm 870x504x13.37 860x508x44
Number of circuits 2 4
Outdoor air flow m3/h 2100 2100
Outdoor sound pressure level dB(A) 54 56.5
Throttle type Capillary+EXV Capillary+EXV
Outdoor unit
Dimension(WxDxH) mm
800x333x554 800x333x554
Packing(WxDxH) mm 920x390x615 920x390x615
Net/Gross weight kg 30.5/33.5 36/39
Refrigerant
Type R410A R410A
GWP 2088 2088
Charged quantity Kg 1.25 1.7
Design pressure MPa 4.2/1.5 4.2/1.5
Refrigerant
piping
Liquid side/ Gas side mm(inch) 2 x Φ6.35/Φ9.52(1/4"/3/8") 2 x Φ6.35/Φ9.52(1/4"/3/8")
Max. length for all rooms m 30 30
Max. length for one indoor unit m 20 20
Max. height difference
between indoor and
outdoor unit
OU higher
than IU m 10 10
OU lower
than IU m 15 15
Max. height difference between indoor
units m 10 10
Ambient
temperature
Cooling Ԩ-15-50 -15-50
Heating Ԩ-15-24 -15-24
1.The above design and specifications are subject to change without prior notice for product improvement.
2.The values given in the table for the noise level reflect the levels in hemi-anechoic rooms.

Service manual DM16-01.01.11-01en
6 Multi DC inverter R410A. Outdoor unit
Outdoor Model M3OE-21HFN1-Q M3OE-27HFN1-Q
Indoor unit combination Single Double Three Single Double Three
Power supply V-ph-Hz 220-240V- 50Hz, 1Ph 220-240V- 50Hz, 1Ph
Cooling
Capacity Btu/h 7000-12000 14000-18000 21000 7000-18000 14000-26000 27000
Input W 1000-1300 1500-1780 1917 750-1700 1400-2350 2465
Rated current A 4.4-5.7 6.5-7.7 8,3 3.3-7.4 6.1-10.2 10,7
EER W/W / / 3,21 / / 3,21
Heating
Capacity Btu/h 8000-14000 17000-20000 22500 8000-20000 16000-28000 28000
Input W 800-1200 1400-1630 1826 720-1750 1520-2174 2273
Rated current A 3.5-5.3 6.1-7.1 7,9 3.2-7.7 6.6-9.5 9,8
COP W/W / / 3,61 / / 3,61
Max. input consumption W 2800 3300
Max. input current A 15 16
Compressor
Model ASM135D23UFZ ATF235D22UMT
Type ROTARY ROTARY
Brand GMCC GMCC
Capacity Btu/h 13836 24345
Input W 1035 1970
Rated current(RLA) A 7,32 6,95
Locked rotor Amp(LRA) A ----- -----
Thermal protector position ----- EXTERNAL
Capacitor μF ----- -----
Refrigerant oil ml ESTER OIL VG74/450 POE(VG74)/670
Outdoor fan
motor
New Model ZKFN-50-8-2 ZKFN-50-8-2
Model
Qty 1 1
Output W 50 50
Capacitor μF - - - -
Speed(Hi/Med/Lo) r/min 750 750
Outdoor coil
Number of rows 2 2
Tube pitch(a)* row pitch(b) mm 21x13.37 25.4x22
Fin spacing mm 1.2 1.4
Fin type Hydrophilic aluminium Hydrophilic aluminium
Tube outside dia.and type mm Φ7, innergroove tube Φ9.52,innergroove tube
Coil length * height * width mm 730x651x26.74 730x660x44
Number of circuits 6 4
Outdoor air flow m3/h 2700 3500
Outdoor sound pressure level dB(A) 57,5 59.5
Throttle type Capillary+EXV Capillary+EXV
Outdoor unit
Dimension(WxDxH) mm 845x363x702 845x363x702
Packing(WxDxH) mm 965x395x755 965x395x755
Net/Gross weight kg 47/50.2 52.7/56.1
Refrigerant
Type R410A R410A
GWP 2088 2088
Charged quantity Kg 2,1 2,1
Design pressure MPa 4.2/1.5 4.2/1.5
Refrigerant
piping
Liquid side/ Gas side mm(inch) 3 x Φ6.35/Φ9.52(1/4"/3/8") 3 x Φ6.35/Φ9.52(1/4"/3/8")
Max. length for all rooms m 45 45
Max. length for one indoor unit m 25 25
Max. height
difference
between indoor
and outdoor unit
OU
higher
than IU
m 10 10
OU lower
than IU m 15 15
Max. height difference between
indoor units m 10 10
Ambient
temperature
Cooling ℃-15-50 -15-50
Heating ℃-15-24 -15-24
1.The above design and specifications are subject to change without prior notice for product improvement.
2.The values given in the table for the noise level reflect the levels in hemi-anechoic rooms.

DM16-01.01.11-01en Service manual
Multi DC inverter R410A. Outdoor unit 7
Outdoor Model M4OE-28HFN1-Q
Indoor unit combination Single Double Three Four
Power supply V-ph-Hz 220-240V- 50Hz, 1Ph
Cooling
Capacity Btu/h 5000-15000 12000-21000 18000-24000 28000
Input W 1334-1784 1730-2403 2234-2777 2556
Rated current A 5.8-7.8 7.5-10.7 9.7-12.1 11,1
EER W/W / / / 3,21
Heating
Capacity Btu/h 5000-15000 12000-21000 18000-27000 30000
Input W 1656-2520 2131-3419 2959-3515 2435
Rated current A 7.2-11.0 9.3-14.9 12.9-15.3 10,6
COP W/W / / / 3,61
Max. input consumption W 3500
Max. input current A 17
Compressor
Model ATF235D22UMT
Type ROTARY
Brand GMCC
Capacity Btu/h 24345
Input W 1970
Rated current(RLA) A 6,95
Locked rotor Amp(LRA) A -----
Thermal protector position EXTERNAL
Capacitor μF -----
Refrigerant oil ml POE(VG74)/670
Outdoor fan
motor
New Model ZKFN-120-8-2
Model WZDK120-38G-W
Qty 1
Output W 120(Output)
Capacitor μF -----
Speed(Hi/Med/Lo) r/min 800
Outdoor coil
Number of rows 1,6
Tube pitch(a)* row pitch(b) mm 25.4x22
Fin spacing mm 1,3
Fin type Hydrophilic aluminium
Tube outside dia.and type mm Φ9.52,innergroove tube
Coil length * height * width mm 1005x762x22+580x762x22
Number of circuits 4
Outdoor air flow m3/h 3800
Outdoor sound pressure level dB(A) 61
Throttle type Capillary+EXV
Outdoor unit
Dimension(WxDxH) mm 946x410x810
Packing(WxDxH) mm 1090x500x865
Net/Gross weight kg 67.6/73.4
Refrigerant
Type R410A
GWP 2088
Charged quantity Kg 2,4
Design pressure MPa 4.2/1.5
Refrigerant
piping
Liquid side/ Gas side mm(inch) 4 x Φ6.35/3x Φ9.52+1xΦ12.7(4x1/4"/3x3/8"+1x1/2")
Max. length for all rooms m 60
Max. length for one indoor unit m 30
Max. height difference
between indoor and outdoor
unit
OU higher than
IU m 10
OU lower than
IU m 15
Max. height difference between indoor units m 10
Ambient
temperature
Cooling ℃-15-50
Heating ℃-15-24
1.The above design and specifications are subject to change without prior notice for product improvement.
2.The values given in the table for the noise level reflect the levels in hemi-anechoic rooms.

Service manual DM16-01.01.11-01en
8 Multi DC inverter R410A. Outdoor unit
Outdoor Model M4OB-36HFN1-Q
Indoor unit combination Single Double Three Four
Power supply V-ph-Hz 220-240V- 50Hz, 1Ph
Cooling
Capacity Btu/h 7000-18000 14000-26000 21000-36000 36000
Input W 1250-1700 1650-2320 2150-3520 3505
Rated current A 5.4-7.4 7.2-10.1 9.3-15.3 15,2
EER W/W / / / 3,01
Heating
Capacity Btu/h 7000-20000 16000-29000 24000-38000 38000
Input W 1375-2440 2050-3340 2880-3360 3266
Rated current A 5.9-10.6 8.9-14.5 12.5-14.6 14,2
COP W/W / / / 3,41
Max. input consumption W 4600
Max. input current A 21.5
Compressor
Model ATF310D43UMT
Type ROTARY
Brand GMCC
Capacity Btu/h 32380
Input W 2600
Rated current(RLA) A 5,1
Locked rotor Amp(LRA) A -----
Thermal protector position INTERNAL
Capacitor μF -----
Refrigerant oil ml PQE(VG74)/1000
Outdoor fan
motor
New Model ZKFN-120-8-2
Model WZDK120-38G-W
Qty 1
Output W 120(Output)
Capacitor μF -----
Speed(Hi/Med/Lo) r/min 900
Outdoor coil
Number of rows 2
Tube pitch(a)* row pitch(b) mm 25.4x22
Fin spacing mm 1.3
Fin type Hydrophilic aluminium
Tube outside dia.and type mm Ф9.52, innergroove tube
Coil length * height * width mm 995x762x44
Number of circuits 4
Outdoor air flow m3/h 5500
Outdoor sound pressure level dB(A) 63.5
Throttle type Capillary+EXV
Outdoor unit
Dimension(WxDxH) mm 946x410x810
Packing(WxDxH) mm 1090x500x865
Net/Gross weight kg 70/75
Refrigerant
Type R410A
GWP 2088
Charged quantity Kg 3
Design pressure MPa 4.2/1.5
Refrigerant
piping
Liquid side/ Gas side mm(inch) 4 x Φ6.35/3x Φ9.52+1xΦ12.7(4x1/4"/3x3/8"+1x1/2")
Max. length for all rooms m 60
Max. length for one indoor unit m 30
Max. height difference
between indoor and outdoor
unit
OU higher than
IU m 10
OU lower than
IU m 15
Max. height difference between indoor units m 10
Ambient
temperature
Cooling ℃-15-50
Heating ℃-15-24
1.The above design and specifications are subject to change without prior notice for product improvement.
2.The values given in the table for the noise level reflect the levels in hemi-anechoic rooms.

DM16-01.01.11-01en Service manual
Multi DC inverter R410A. Outdoor unit 9
Outdoor Model M5OE-42HFN1-Q
Indoor unit combination Single Double Three FOUR Five
Power supply V-ph-Hz 220-240V- 50Hz, 1Ph
Cooling
Capacity Btu/h 7000-18000 14000-28000 21000-36000 28000-40000 42000
Input W 680-1800 1400-2780 2100-3450 2700-3700 3822
Rated current A 3.0-8.0 6.2-11.8 9.0-15.0 11.6-16.0 16,6
EER W/W / / / / 3,22
Heating
Capacity Btu/h 7000-18000 14000-28000 21000-36000 28000-40000 42000
Input W 680-1800 1400-2680 1995-3330 2580-3570 3372
Rated current A 3.0-8.0 6.2-11.3 8.5-14.5 11.1-15.8 14,7
COP W/W / / / / 3,65
Max. input consumption W 4700
Max. input current A 22
Compressor
Model ATF310D43UMT
Type ROTARY
Brand GMCC
Capacity Btu/h 32380
Input W 2600
Rated current(RLA) A 5,1
Locked rotor Amp(LRA) A -----
Thermal protector position INTERNAL
Capacitor μF -----
Refrigerant oil ml PQE(VG74)/1000
Outdoor fan
motor
New Model ZKFN-120-8-2
Model WZDK120-38G-W
Qty 1
Output W 120(Output)
Capacitor μF -----
Speed(Hi/Med/Lo) r/min 900
Outdoor coil
Number of rows 2,6
Tube pitch(a)* row pitch(b) mm 25.4x22
Fin spacing mm 1.3
Fin type Hydrophilic aluminium
Tube outside dia.and type mm Φ9.52,innergroove tube
Coil length * height * width mm 978x762x44+580x762x22
Number of circuits 4
Outdoor air flow m3/h 5500
Outdoor sound pressure level dB(A) 62
Throttle type Capillary+EXV
Outdoor unit
Dimension(WxDxH) mm 946x410x810
Packing(WxDxH) mm 1090x500x865
Net/Gross weight kg 76/81
Refrigerant
Type R410A
GWP 2088
Charged quantity Kg 3.6
Design pressure MPa 4.2/1.5
Refrigerant
piping
Liquid side/ Gas side mm(inch) 5 x Φ6.35/4x Φ9.52+1xΦ12.7(5x1/4"/4x3/8"+1x1/2")
Max. length for all rooms m 75
Max. length for one indoor unit m 30
Max. height difference
between indoor and
outdoor unit
OU higher
than IU m 10
OU lower
than IU m 15
Max. height difference between indoor
units m 10
Ambient
temperature
Cooling ℃-15-50
Heating ℃-15-24
1.The above design and specifications are subject to change without prior notice for product improvement.
2.The values given in the table for the noise level reflect the levels in hemi-anechoic rooms.

Service manual DM16-01.01.11-01en
10 Multi DC inverter R410A. Outdoor unit
4. Dimensions
A
B
D
Model Unit：mm
W D H W1 A B
M2OE-14HFN1-Q 800 333 554 860 514 340
M2OF-18HFN1-Q 800 333 554 860 514 340
M3OE-21HFN1-Q 845 363 702 923 540 350
M3OE-27HFN1-Q 845 363 702 923 540 350
M4OE-28HFN1-Q 946 410 810 1034 673 403
M4OB-36HFN1-Q 946 410 810 1034 673 403
M5OE-42HFN1-Q 946 410 810 1034 673 403