Midea MSCI-09HRN1 Operating manual

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Draft edition
GD Midea Refrigeration Equipment Co.,Ltd
MULTI SPLIT TYPE, HEAT PUMP AIR CONDITIONERS
Technical service manual 2005
R410A Corona multi Series
Indoor Models
MSCI-09HRN1
MSCI-12HRN1
Outdoor Models
M2OA-18HRN1 M2OA-21HRIN1
M3OA-27HRN1 M2OA-30HRIN1

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Multi SERIES
1. Features
2. Specification
3. Dimensions
4. Refrigeration cycle diagram
5. Operation limits
6. Wiring diagram
7. Troubleshooting
8. Electronic function
9. Exploded view parts
10.Characteristic of temp. sensor

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1.Features
1.1Compact design
1.2High efficiency and quiet operation
1.3Unitary outdoor unit design

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2 Specification
2.1 Indoor unit Corona multi indoor unit
Model MSCI-09HRN1 MSCI-12HRN1
Model CE-KFR26G/CTN1Y CE-KFR32G/CTN1Y
Power supply Ph-V-Hz 1Ph,220-240V~,50Hz 1Ph,220-240V~,50Hz
Cooling Capacity BTU/h 9000 12000
Heating Capacity BTU/h 11000 13000
Running Current A 0.18 0.2
Design Pressure (Hi/Lo) Mpa 4.2/2.5 4.2/2.5
Capacity
Max. Operating Pressure (Hi/Lo) Mpa 3.5/3.5 3.5/3.5
Model RPG13H RPG13D
Brand Welling Welling
Input W 39.5 44
Capacitor uF 1.2 1.2
Indoor fan motor
Speed(hi/mi/lo) r/min 1200/950/850 1220/1000/800
a.Number of rows 2 2
b.Tube pitch(a)x row pitch(b) mm 21x13.37 21x13.37
c.Finspacing mm 1.3 1.3
d.Fin type (code) Unhydrophilic aluminium Hydrophilic aluminium
e.Tube outside dia.and type mm φ7 INNEGROOVE TUBE φ7 INNEGROOVE TUBE
f.Coil length x height x width mm 538X252X26.74 578X252X26.74
Indoor coil
g.Number of circuits 2 2
Indoor air flow (Hi/Mi/Lo) m3/h 500/460/410 500/430/370
Indoor noise level (Hi/Mi/Lo) dB(A) 36/34/32 37/34/31
Dimension (W*H*D) mm 710×250×195 790×265×193
Packing (W*H*D) mm 800×340×270 875x285x375
Indoor unit
Net/Gross weight Kg 8/9.5 9/11

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2.2 Outdoor unit
Model M2OA-18HRN1 M2OA-21HRN1 M3OA-27HRN1 M3OA-30HRN1
Power supply Ph-V-Hz 1Ph,220-240V~,50Hz 1Ph,220-240V~,50Hz 1Ph,220-240V~,50Hz 1Ph,220-240V~,50Hz
Capacity Btu/h 9000x2 9000+12000 9000x3 9000x2+12000
Input W 890x2 890+1250 1650+1150 1800+1300
Rated current A 4.0x2 4.0+5.7 8.0+5.5 8.2+5.8
Cooling
EER Btu/w.h 10.2 9.8 9.6 9.6
Capacity Btu/h 1000x2 10000+14000 10000x3 10000x2+1300
Input W 890x2 890+1250 1650+1150 1750+1250
Rated current A 4.0x2 4.0+5.7 7.7+5.6 8.0+5.6
Heating
COP Btu/w.h 11.3 10.9 10.6 10.9
Moisture Removal L/h 1.0x2 +1.2 1.0x2 +1.2 1.0x2 +1.2 1.0x2 +1.2
Max. input consumption W 2160 2580 3400 3720
Max. current A 9.9 11.7 15.6 16.7
Starting current A 21.7 29.9 31.8 31.8
Model PA108X1C-4FTx2 PA108X1C-4FT ; PA145X2C-4FT
PA200X2CS-4KU1 ;
PA145X2C-4FT
PA200X2CS-4KU1 ;
PA145X2C-4FT
Type Rotary Rotary Rotary Rotary
Brand GD Toshiba GD Toshiba GD Toshiba GD Toshiba
Capacity Btu/h 8874 8874/12014 16791/12014 16791/12014
Input W 890 890/1200 1670/1200 1670/1200
Rated current(RLA) A 4.07 4.07/5.6 7.81/5.6 7.81/5.6
Locked rotor Amp(LRA) A 40 40/57 57 57
Thermal protector Internal Internal Internal Internal
Capacitor uF 25uF/440-450VACx2 25uF/440VAC;35uF/440VAC 35uF/440VACx2 35uF/440VACx2
Compressor
Refrigerant oil ml 350 350/480 480/750 480/750
Outdoor fan
Model YDK69-6 YDK69-6 YDK50-4G1 YDK50-4G1

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Brand Welling Welling Welling Welling
Input W 140 140 200 200
Capacitor uF 4uFx2 4uFx2 4uFx2 4uFx2
motor
Speed r/min 830/650 830/650 1150 1150
a.Number of rows 2 2 2 2
b.Tube pitch(a)x row
pitch(b)
mm 25.4x24 25.4x24 25.4x24 25.4x24
c.Fin spacing mm 1.7 1.7 1.7 1.7
d.Fin type (code) Hydrophilic aluminium Hydrophilic aluminium Hydrophilic aluminium Hydrophilic aluminium
e.Tube outside dia.and
type
mm Ф9.53, Innergroove tube Ф9.53, Innergroove tube Ф9.53, Innergroove tube Ф9.53, Innergroove tube
f.Coil length x height x
width
mm 813X812X44 813X812X44
Outdoor coil
g.Number of circuits 2/2 2/2 3/3 3/3
Outdoor air flow m3/h 2200 2200 3200 3200
Outdoor noise level dB(A) 56 56 58 58
Dimension(W*H*D) mm 895X655X345 895X655X345 860X830X330 860X830X330
Packing (W*H*D) mm 1050X720X470 1050X720X470 1000X985X425 1000X985X425
Outdoor unit
Net/Gross weight Kg 75/81 76/82 81/88 81/88
Refrigerant type g R410A/ 980x2 R410A/ 1100+900 R410A/ 1150+1550 R410A/ 1150+1550
Design pressure(Hi/Lo) MPa 4.2/2.5 4.2/2.5 4.2/2.5 4.2/2.5
Liquid side/ Gas side mm(inch) Ф6.35/Ф9.53 Ф6.35/Ф9.53;Ф6.35/Ф12.7 Ф6.35/Ф9.53 *3 Ф6.35/Ф9.53 *2;Ф6.35/Ф12.7
Max. refrigerant pipe
length
m 15 (each unit) 15 (each unit) 15 (each unit) 15 (each unit)
Refrigerant
piping
Max. difference in level m 5 (each unit) 5 (each unit) 5 (each unit) 5 (each unit)
Connection wiring No No No No

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Plug type No No No No
Thermostat type Electronic control Electronic control Electronic control Electronic control
Operationtemp ℃17~30 17~30 17~30 17~30
Ambienttemp ℃18~45(cooling);
-7~30(heating)
18~45(cooling); -7~30(heating) 18~45(cooling); -7~30(heating) 18~45(cooling); -7~30(heating)
Application area m2 (14-21)x2,16-24 (14-21)x2,16-24 (14-21)x2,16-24 (14-21)x2,16-24
Qty’per 20’ /40’ /40'HQ set 45/94/118

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3.Dimensions
3.1 Indoor unit
a) Indoor unit 9K
b) Indoor Unit 12K

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3.2 Outdoor unit
a) Outdoor unit 18K/21K
b) Outdoor unit 27K/30K

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4.Refrigeration cycle diagram
“1 drive 3 system” is made up of one “1 drive 1 system” and one “1 drive 2 system”.
PMV1
1 drive 2 system
SV1：Primary four-way valve SV2：Secondary four-way valve PMV1，PMV2：Electronic expansive valve
T1，T2：Indoor pipe temperature sensor
condenser
four-way valve
evaporator
compressor
1 drive 1 system
PMV2
SV2
SV1
2＃1＃T2
T1
refrigeration distributor
Compressor

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5.Operation limits
5.1Cooling operation
Outdoor unit air temp.℃DB
45
40
35
30
25
20
0 25 50
Indoor air temp. ℃DB
Note : The chart is the result from the continuous operation under constant air temperature
conditions. However, excludes the initial pull-down stage.
5.2Heating operation
Indoor air temp. ℃DB
30
25
20
15
10
5
-5 5 15 25
Outdoor unit air temp.℃DB
Note : The chart is the result from the continuous operation under constant air
temperature conditions. However, excludes the initial pull-down stage.
COOLING

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6.Wiring diagram
Indoor unit
CORONA INDOOR UNIT
Outdoor unit
FOR 1 DRIVE 2 OUTDOOR UNIT

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FOR 1 DRIVE 3 OUTDOOR UNIT

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7.Troubleshooting
7.1 Indoor unit
Failure phenomenon Operation lamp Timer lamp
Indoor fan speed has been out of control for over 1 minute ☆X
Indoor room temp. sensor or evaporator temp. sensor is open circuit
or short circuit
☆on
EEPROM error on ☆
Over current protection of the compressor occurs 4 times in 1h X ☆
rExtinguish
☆ Flash at 5Hz
On Light
7.2 Outdoor unit
Failure phenomenon LED1 LED2 LED3
Stand by ☆☆☆
High temp. protect of condenser ☆☆
Temp. sensor in condenser 1 is open circuit or short circuit ☆
Temp. sensor in condenser 2 is open circuit or short circuit ☆
☆ Flash at 2Hz

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8 Electronic function
8.1 Electric Control working environment
8.1.1 input voltage: 175~253V
8.1.2 Input power frequency:50Hz
8.1.3 Ambient temperature: -7°C~+43°C
8.1.4 Indoor fan normal working amp is less than 1A,
8.1.5 Outdoor fan. Normal working amp is less than 1.5A
8.1.6 Four-way valve normal working amp is less than 1A.
8.1.7 Swing motor: DC12V.
8.2 Display board
Sig nal r ec epto
r
122 345
8.2.1 AUTO indicator
This indicator illuminates when the air conditioner is in AUTO operation.
8.2.2 TIMER indicator
This indicator illuminates when TIMER is set ON/OFF.
8.2.3 PRE.-DEF. Indicator (For Cooling & Heating models only)
This indicator illuminates when the air conditioner starts defrosting automatically or when
the warm air control feature is activated in heating mode.
8.2.4 TEMPERATURE indicator
a) Usually it displays the temperature settings. When change the setting temperature, this
indicator begins to flash, and stops 20 seconds later.
b) It displays the room temperature when the air conditioner is in FAN only operation.
c) When the unit stops operation, it returns to original factory settings.
d) Displays the malfunction code or protection code.
8.2.5 OXYGEN GENERATOR indicator (Optional)
This indicator appears only when the Oxygen Generatorr is in operation.(Optional)
8.3 Proper symbols and their meanings
TA: Indoor ambient temperature
TE: Indoor evaporator temperature
TS: Setting temperature through the remote controller
TE1: Anti-cold wind, from Fan Off to Breeze temperature
TE2: Anti-cold wind, from Breeze to Setting Fan Speed temperature
TE3: Anti-cold wind, from Setting Fan Speed to Breeze temperature
TE4: Anti-cold wind, from Breeze to Fan Off temperature
TE5: Evaporator low temperature protection entering temperature
TE6: Evaporator low temperature protection restoring temperature

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TE7: Evaporator high temperature protection, compressor off temperature
TE8: Evaporator high temperature protection, fan off temperature
TE9: Evaporator high temperature protection, restoring temperature
T3: Outdoor unit pipe sensor
T4: Outdoor temperature sensor
8.4 Systematic functions.
Remote receiving.
Testing and forced run.
Position set for indoor unit wind vane.
LED displaying and alarm.
On or off Timer.
Protection for the compressor.
High temperature protection of indoor heat exchanger in heating mode.
Auto defrosting and heating recovery under heating mode.
Anti cold air under heating mode.
Anti frozen under cooling mode.

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8.5 Protection
8.5.1 The compressor functions protection with a delay of three minutes.
8.5.2 High temp. protection of condenser.
8.5.3 Sensor protection at open circuit and breaking disconnection
8.5.4 Temperature Fuse break protection
8.5.5 Fan Speed is out of control. When Indoor Fan Speed is too high(higher than High
Fan+300RPM)or too low(lower than 400RPM), the entire unit stops and LED displays
failure information and can’t returns to normal operation automatically.
8.6 Fan-only mode
Fan speed is high/mid/low/ Auto
8.7 Cooling mode
The 4-way valve is closed under cooling mode.
The action of the compressor and the outdoor fan:
Condition Compressor Outdoor fan
TA> Ts+1 On OnTemp. up
TA<Ts+1 Off Off
TA> Ts On OnTemp . do wn
TA<Ts Off Off
TA: Indoor ambient temperature
TS: Setting temperature through the remote controller
Auto fan under cooling mode:
Condition
T=Indoor Temp.-Setting Temp.
Indoor fan speed
T<3℃Low
3℃<T<5℃Med.
Temp. up
T>5℃High
T> 3℃High
1℃<T<3℃Med.
Temp. do wn
T<1℃Low
Anti-freezing control to indoor evaporator under cooling mode
Condition
Temp. Time
Compressor Outdoor fan
T> TE6 On OnTemp. up
T< TE6 >5 Minutes Off Off
T> TE5 On OnTemp. do wn
T< TE5 >5 Minutes Off Off
Condenser high-temperature protection under heating mode
T3 >65℃, turn off compressor.
TE5: Evaporator low temperature protection entering temperature
TE6: Evaporator low temperature protection restoring temperature
8.8 Dehumidifying mode
8.8.1 The 4-way valve is off in dehumidifying mode
8.8.2 Compressor and Indoor Fan actions in dehumidifying mode
Compressor run 5 minutes , and indoor fan run 5 minutes in low speed, then turn off the

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compressor, indoor fan run 5 minutes in low speed. And repeat on and off cycle.
8.8.3 Low room temperature protection:
When room temperature decreases to below 10℃, the compressor and the outdoor fan
will stop(indoor fan is Breeze). Dehumidifying operation will be resumed when room
temperature restores to over 13℃.
8.8.4 Under dehumidifying mode, the anti-freezing function of the indoor heat exchanger is the
same as that of cooling mode.
8.9 Heating mode
8.9.1 Generally, the 4-way valve is open in heating mode, but it is closed in defrosting mode.
4-way valve must delay 2 minutes compared with compressor if the compressor changed
into non-heating mode or turned off. 4-way valve doesn't delay in dehumidifying mode.
8.9.2 Generally, the outdoor fan is turned off with the on-off action of compressor in heating
mode, except for the defrosting mode or the end of defrost.
8.9.3 Action conditions of compressor under heating mode: compressor must run for 7
minutes after starting and then judge temperature. Meanwhile other protections are still
valid.
Condition Compressor Outdoor fan
TA> Ts+3 Off OffRoom temp. up
TA<Ts+3 On On
TA< Ts+2 On OnRoom temp. down
TA>Ts+2 Off Off
TA: Indoor ambient temperature
TS: Setting temperature through the remote controller
8.9.4 Indoor Fan actions under heating mode
Indoor Fan can be set at HIGH/MID/LOW/AUTO by using a remote controller, but
Anti-cold wind function has the priority.
Anti-cold wind control function under heating mode
Condition
TE
Indoor fan speed
TE<TE1 Off
TE1<TE<TE2 Breeze
Indoor exchanger temp. up
TE>TE2 Setting fan speed
TE> TE3 Setting fan speed
TE3<TE<TE4 Breeze
Indoor exchanger temp. down
TE<TE4 Off
TE: Indoor evaporator temperature
TE1: Anti-cold wind, from Fan Off to Breeze temperature
TE2: Anti-cold wind, from Breeze to Setting Fan Speed temperature
TE3: Anti-cold wind, from Setting Fan Speed to Breeze temperature
TE4: Anti-cold wind, from Breeze to Fan Off temperature

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8.9.5 Auto wind under heating mode
Condition
T=Indoor Temp.-Setting Temp.
Indoor fan speed
T<2℃HighRoom temp. up
T>2℃Med.
T> 0℃Med.Room temp. down
T<0℃High
8.9.6 Indoor evaporator high-temperature protection under heating mode
Condition Compressor Outdoor fan
TE<TE8 On On
TE8<TE<TE7 On Off
Indoor exchanger temp. up
TE>TE7 Off Off
TE>TE9 Off OffIndoor exchanger temp. down
TE<TE9 On On
TE: Indoor evaporator temperature
TE7: Evaporator high temperature protection, compressor off temperature
TE8: Evaporator high temperature protection, fan off temperature
TE9: Evaporator high temperature protection, restoring temperature
8.10 Defrosting operation (Available for heating only).
8.10.1 Defrosting condition:
When T3<0℃and compressor runs 40 minutes.
T3: Temp. of condenser.
8.10.2 Ending condition of defrost
If one of following conditions is satisfied, end the defrost and turn into heating:
A.The defrost time has reached to 10 minutes.
B.T3>20. ℃
8.10.3 Time sequence of the whole defrosting procedure is as follows
Compressor
4-wayValve
Outdoor Fan
OFF
OFF
ON
ON
ON

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8.11 Automatic operation mode
8.11.1 The air conditioner automatically selects one of the following operation modes: cooling,
heating or ventilation according to the difference between room temp. (TA) and set temp.
(TS).
TA—TS Operation mode
TA—TS>2℃Cooling
-1 ≤TA℃—TS≤+2℃Fan-only
TA—TS<-1℃Heating (Fan-only for cooling only type)
8.11.2 The indoor fan blows automatically in corresponding selected mode.
8.11.3 The motion of indoor fan’s vane should accord with the selected operation mode.
8.11.4 One mode should be carried out for at least 15 minutes once selected. If the compressor
cannot start for 15 minutes, reselect the operation mode according to the room temp.
and set temp.or reselect when the set temp. varies.
8.12 Forced cooling function
8.12.1 Select forced cooling function with the forced cooling button or the switch.
8.12.2 The compressor is unconditionally turned on, after 30 minutes cooling operation whose
fan mode is set as low, the A/C operates under the DRY mode with a set temp. of 24℃.
8.12.3 All protections of remote control cooling are available under forced cooling operation.
8.13 Forced Auto function
Select forced auto function with the forced auto button or the switch in the display
board.
In forced auto status the A/C operates under remote control mode with a set temp. of
24℃.
8.14 Timer Function Requirement
The maximum length of timer is 24 hours and the minimum resolving power is 15
minutes.
8.15 Economic Running
8.15.1 The economic running function is available under cooling, heating or auto mode.
8.15.2 Cooling:
The set temperature rise 1℃per hour. Two hours later, the set temperature will
maintain as a constant and the air circulation is kept at low speed.
8.15.3 Heating:
The set temperature decrease 1℃per hour. Two hours later, the set temperature will
maintain as a constant and the air circulation is kept at low speed (Cold air proof
function takes precedence over all).
8.15.4 Auto:
The economic running function operates in accordance with the selected running mode
by the auto mode.