Midea MFM-24ARN1-Q User manual

SERVICE MANUAL
MIDEA AIRCONDITIONER
FLOOR STANDING TYPE
Model:
MFM-24ARN1-Q / MOF-24HN1-QB8
MFM-48ARN1-R / MOU-48HN1-RB6W
MFM-60ARN1-R / MOUL-60HN1-R
DM16‐01.01.25en

Floor Standing MFM DM16-01.01.25en
Service manual 2
CONTENTS
1 .Safety Precautions .................................................................................................................. 3
2 .Specifications .......................................................................................................................... 5
3. Dimension ................................................................................................................................ 7
4.Refrigerant cycle diagram ....................................................................................................... 9
5 . Wiring diagram ..................................................................................................................... 11
6．Installation details ............................................................................................................... 14
7．External view and display ................................................................................................... 33
8．Operation characteristics ................................................................................................... 35
9．Electronic function .............................................................................................................. 36
10.Trouble shooting .................................................................................................................. 43
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DM16-01.01.25en Floor Standing MFM
3 Service manual
1 .Safety Precautions
1.1 Precaution
To prevent injury to the user or other people and property damage, the following instructions must
be followed.
Incorrect operation due to ignoring instruction will cause harm or damage.
Before service unit, be sure to read this service manual at first.
1.2 Installation
For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized service center.
Do not disassemble or repair the product by yourself.
Sharp edges could cause injury, be especially careful of the case edges and the fins on the
condenser and evaporator.
Be sure the installation area does not deteriorate with age.
Take care to ensure that power cable could not be pulled out or damaged during operation.
Do not place anything on the power cable.
Do not plug or unplug the power supply plug during operation.
Do not store or use flammable gas or combustible near the product.
When flammable gas leaks, turn off the gas and open a window for ventilation before turn the
product on.
If strange sounds, or small or smoke comes from product. Turn the breaker off or disconnect the
power supply cable as soon as possible.
When the product is soaked (flooded or submerged), contact an Authorized service center.
Be caution that water could not enter the product.
Turn the main power off when cleaning or maintaining the product.
When the product is not be used for a long time, disconnect the power supply plug or turn off the
breaker.
1.3 Caution
Always check for gas (refrigerant) leakage after installation or repair of product.
Install the drain hose to ensure that water is drained away properly.
Keep level even when installing the product.
Do not install the product where the noise or hot air from the outdoor unit could damage the
neighborhoods.
Use two or more people to lift and transport the product.
Do not install the product where it will be exposed to sea wind (salt spray) directly.
1.4 Operational
Do not expose the skin directly to cool air for long periods of time. (Do not sit in the draft).
Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a
consumer air conditioner, not a precision refrigerant system.
Do not block the inlet or outlet of air flow.
Use a soft cloth to clean. Do not use harsh detergents, solvents, etc.
Do not touch the metal parts of the product when removing the air filter. They are very sharp.

Floor Standing MFM DM16-01.01.25en
Service manual 4
Do not step on pr put anything on the product. (outdoor units)
Always insert the filter securely. Clean the filter every two weeks or more often if necessary.
Do not insert hands or other object through air inlet or outlet while the product is operated.
Do not drink the water drained from the product.
Use a firm stool or ladder when cleaning or maintaining the product.
Replace the all batteries in the remote control with new ones of the same type. Do not mix old and
mew batteries or different types of batteries.
Do not recharge or disassemble the batteries. Do not dispose of batteries in a fire.
If the liquid from the batteries gets onto your skin or clothes, wash it well with clean water. Do not
use the remote of the batteries have leaked.

DM16-01.01.25en Floor Standing MFM
5 Service manual
2 .Specifications
Model MFM-24ARN1-Q MFM-48ARN1-R MFM-60ARN1-R
Outdoor MOF-24HN1-QB8 MOU-48HN1-RB6W MOUL-60HN1-R
Power supply V-ph-Hz 220-240-1-50 380-415-3-50 380-3-50
Cooling
Capacity
Btu/h 24500 47900 57900
kW 7,18 14,04 16,97
Input W 2700 5150 6500
Rated current A 13 9.0 11.0
EER W/W 2.66 2.73 2.61
Heating
Capacity
Btu/h 27500+7500 52000+12000 62000+12000
kW 8.06+2.20 15.24+3.52 18.17+3.52
Input W 2500+2200 5350+3700 5300+3700
Rated current A 12+10 9.2+5.3 10.0+5.3
COP W/W 3.22 2,85 3,43
Max. input consumption W 3500+2200 5800+3700 8200+3700
Max. current A 16.6+10 10.5+5.3 14.7+5.3
Starting current A 66 66 67
Compressor
Model PA290G2CS-4MU1 C-SBN373H8D C-SBN453H8D
Type ROTARY SCROLL SCROLL
Brand GMCC PANASONIC PANASONIC
Capacity Btu/h 24771/24959 48109 55957/69264
Input W 2430/2600 4750 5750/6750
Rated current(RLA) A 11.65/12.6 8.22 9.77/9.84
Locked rotor Amp(LRA) A 66 66 67
Thermal protector ----- ---- ----
Thermal protector position INTERNAL INTERNAL INTERNAL
Capacitor uF 50 - - - -
Refrigerant oil/oil charge ml
ESTER OIL
VG74/850
FV68S / 1700 FV68S/1700
Indoor fan
motor
Model YDK75-8 YDK120-8T YDK160-8
Input W 166/145 288/276 347/308
Capacitor uF 5.0 6.5 9.0
Speed(Hi/Mi/Lo)or (Hi/Lo) r/min 540/440 550 / 480 615 / 530
Indoor coil
a.Number of rows 2 2 3
b.Tube pitch(a)x row pitch(b) mm 21x13.37 21x13.37 25.4x22
c.Fin spacing mm 1.3 1.4 1.5
d.Fin type (code)
Hydrophilic
aluminium
Hydrophilic
aluminium
Hydrophilic
aluminium
e.Tube outside dia.and type mm Φ7,innergroove tube Φ7,innergroove tube
Φ9.52,innergroove
tube
f.Coil length x height x width mm 405x735x26.74 422x966x26.74 484x812x66
g.Number of circuits 6 10 6
Indoor air flow (Hi/Lo) m3/h 1100/900 1700/1480 2250/1950

Floor Standing MFM DM16-01.01.25en
Service manual 6
Indoor noise level (Hi/Lo) dB(A) 47/43 52/49 54/51
Indoor unit
Dimension(W*D*H) mm 500x315x1700 550x418x1824 600x455x1934
Packing (W*D*H) mm 1805x615x425 1935x655x540 2040x745x595
Net/Gross weight Kg 38.6 / 50 55.8 / 70 68.5/88.3
Outdoor fan
motor
Model YDK53-6C YDK65-6F(B) x2 YDK65-6F(B) x2
Input W 136 162 162
Capacitor uF 3.0 3.5 3.5
Speed r/min 800 765 765
Outdoor coil
a.Number of rows 2 2 2
b.Tube pitch(a)x row pitch(b) mm 22x19.05 22x19.05 22x19.05
c.Fin spacing mm 1.4 1.6 1.6
d.Fin type (code) Hydrophilic aluminium
e.Tube outside dia.and type mm
Φ7.94,innergroove
tube
Φ7.94,innergroove
tube
Φ7.94,innergroove
tube
f.Coil length x height x width mm 770x660x38.1 837x1100x38.1 837x1100x38.1
g.Number of circuits 4 8 8
Outdoor noise level dB(A) 60 64 64
Outdoor unit
Dimension(W*D*H) mm 845x320x700 900x350x1170 900x350x1170
Packing (W*D*H) mm 965x395x755 1032x443x1307 1032x443x1307
Net/Gross weight Kg 50 / 53.3 97 / 107 96 / 107
Refrigerant type g R410A/1800g R410A/3300g R410A/3200g
Design pressure MPa 4.2/1.5 4.2/1.5 4.2/1.5
Refrigerant
piping
Liquid side/ Gas side mm(inch)
Φ9.52/Φ15.9(3/8"/5/
8")
Φ12.7/Φ19(1/2"/3/4"
)
Φ12.7/Φ19(1/2"/3/4"
)
Max. refrigerant pipe length m 20 20 20
Max. difference in level m 10 10 10
Connection wiring mm2 2.5(Optional) 2.5(Optional) 2.5(Optional)
Plug type - - - - - -
Operation temperature Ԩ 17-30 17-30 17-30
Room
temperature
Indoor(cooling/ heating) Ԩ 17-32/0-30 17-32/0-30 17-32/0-30
Outdoor(cooling/heating) Ԩ 18-43/-7-24 18-43/-7-24 18-43/-7-24
Application area m2 33-48 64-94 77-113
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DM16-01.01.25en Floor Standing MFM
7 Service manual
3. Dimension
3.1 Indoor Unit
H
W
D
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Dimension
Mode W(mm) D(mm) H(mm)
MFM-24ARN1-Q 500 315 1700
MFM-48ARN1-R 550 418 1824
MFM-60ARN1-R 600 455 1934
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Floor Standing MFM DM16-01.01.25en
Service manual 8
3.2 Outdoor Unit
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Dimension
Mode W(mm) D(mm) H(mm) W1(mm) A(mm) B(mm)
MOF-24HN1-QB8 845 320 700 908 560 335
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Dimension
Mode W(mm) D(mm) H(mm) W1(mm) A(mm) B(mm)
MOU-48HN1-RB6W 900 350 1170 985 590 378
MOUL-60HN1-R 900 350 1170 985 590 378

DM16-01.01.25en Floor Standing MFM
9 Service manual
4.Refrigerant cycle diagram
MOF‐24HN1‐QB8
INDOOR OUTDOOR
LIQUID SIDE
GAS SIDE
HEAT
EXCHANGE
(EVAPORATOR)
HEAT
EXCHANGE
(CONDENSER)
COMPRESSOR
2-WAY VALVE
3-WAY VALVE
CHECK VALVE
(Heating Model only)
CAPILIARY TUBE
4-WAY VALVE
(Heating Model only)
COOLING
HEATING
T2 Evaporator
temp. sensor
T1 Room temp.
sensor
T3 Condenser
temp. sensor
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Floor Standing MFM DM16-01.01.25en
Service manual 10
MOU‐48HN1‐RB6W  MOUL‐60HN1‐R
LIQUID SIDE
GAS SIDE
HEAT
EXCHANGE
(EVAPORATOR) HEAT
EXCHANGE
(CONDENSER)
Compressor
2-WAY VALVE
3-WAY VALVE
4-WAY VALVE
COOLING
HEATING
T2 Evaporator
temp. sensor
T1 Room temp.
sensor
T3 Condenser
temp. sensor
T5 Discharge temp. sensor
T4 Ambient
temp. sensor
INDOOR OUTDOOR
Oil return Capillary
Oil separator
Low pressure
switch
High pressure switch
CHECK VALVE
(Heating Model only)
CAPILIARY TUBE
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