Text preview for : SM Midea t20 star.PDF part of Midea T3 Star Series Service manual Midea models:
MSF3-07CR
MSF3-07HR
MSF3-09CR
MSF3-09HR
MSF3-12CR
MSF3-12HR
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GD Midea Refrigeration Equipment Co.,Ltd
SPLIT TYPE, HEAT PUMP AIR CONDITIONERS
Technical & service manual 2005
T3 Star Series (50Hz) R22 Wall Mounted
[Models]
MSF3-07CR
MSF3-07HR
MSF3-09CR
MSF3-09HR
MSF3-12CR
MSF3-12HR
Contents
1. Features........................................................................... 2
2. Specification.......................................................................3
3. Dimensions....................................................................... 4
4. Refrigeration cycle diagram...................................................5
5. Operation limits...................................................................6
6. Wiring diagram....................................................................7
7. Troubleshooting...................................................................9
8. Electronic function...............................................................10
1
1.Features
1.1 Compact design
1.2 High efficiency and quiet operation
2
2.Specification
Model MSF3-07CR MSF3-07HR MSF3-09CR MSF3-09HR MSF3-12CR MSF3-12HR
Power supply Ph-V-Hz 1, 220-240V~, 1, 220-240V~, 50Hz 1, 220-240V~, 50Hz 1, 220-240V~, 50Hz 1, 220-240V~, 50Hz 1,220-240V~,50Hz
Cooling Capacity Btu/h 7000 7000 9000 9000 12000 12000
Input W 850 850 930 1000 1230 1230
Rated current A 3.8 3.8 4.1 4.4 5.7 5.7
EER Btu/w.h 8.7 8.6 8.6 8.6 9.8 9.8
Heating Capacity Btu/h 8500 10500 13000
Input W 880 1020 1290
Rated current A 4 4.5 6.0
COP W/W 2.8 2.8 10.1
Moisture Removal L/h 0.6 0.6 1.0 1.0 1.2 1.2
Max. input consumption W 1000 1000 1300 1300 1690 1690
Max. current A 4.4 4.4 6 6 9.1 9.1
Starting current A 18.5 18.5 19.8 19.8
Compressor Model 2P14C235ANA 2P14C235ANA PH165X1CY-4DG2 2P18S225ANK PH200X2C-4FT PH225X2C-4FT
Type Rotary Rotary Rotary Rotary Rotary Rotary
Brand GD Matsushita GD Matsushita GD Toshiba GD Matsushita GD Toshiba GD Toshiba
Capacity Btu/h 7500 7500 9380 9920 11840 13200
Input W 725 725 900 970 1135 1250
Rated current(RLA) A 3.4 3.4 4.1 4.5 5.2 5.7
Locked rotor Amp(LRA) A 15 15 24 24 25 26
Thermal protector MRA98854 MRA98854 UP3QE0591-T61(inte External MRA98745 UP3QE0591-T51(inte UP3RE0591-T56(inte
Capacitor uF 25/370V 25/370V 25 30 25/370V 35/370V
Refrigerant oil ml 270 270 SUNISO 400 SUNISO 350 SUNISO 4GSD SUNISO 4GSD
Indoor fan motor Model RPG13H RPG13H RPG13H RPG13H RPG13H RPG13H
Brand Welling Welling Welling Welling Welling Welling
Input W 36 36 36 36 36 36
Capacitor uF 1.2 1.2 1.2 1.2 1.2 1.2
Speed(hi/mi/lo) r/min 1020/930/850 1020/930/850 1100/1000/900 1100/1000/900 1100/1000/900 1100/1000/900
Indoor air flow (Hi/Mi/Lo) m3/h 440/400/370 440/400/370 480/440/410 480/440/410 480/440/410 480/440/410
Indoor noise level (Hi/Mi/Lo) dB(A) 35/32/30 35/32/30 38/35/33 38/35/33 38/35/33 38/35/33
Indoor unit Dimension (W*H*D) mm 710x250x190 710x250x190 710x250x190 710x250x190 710x250x190 710x250x190
Packing (W*H*D) mm 800 340 270 800 340 270 800 340 270 800 340 270 800 340 270 800 340 270
Net/Gross weight Kg 9/11.5 9/11.5 9/11.5 9/11.5 9/11.5 9/11.5
Outdoor fan motor Model YDK24-6T YDK24-6T YDK24-6T YDK24-6T YDK24-6 YDK24-6
Brand Welling Welling Welling Welling WELLING WELLING
Input W 70 70 70 70 70 70
Capacitor uF 3/450V 3/450V 3 3 2.5 2.5
Speed r/min 850 850 850 850 850 850
Outdoor air flow m3/h 1400 1400 1500 1500 1800 1800
Outdoor noise level dB(A) 52 52 53 53 53 53
Outdoor unit Dimension(W*H*D) mm 700×535×235 700×535×235 700X535X235 700X535X235 780X540X250 780X540X250
Packing (W*H*D) mm 815 580 325 815 580 325 815 580 325 815 580 325 910 575 335 910 575 335
Net/Gross weight Kg 28/31 28/31 30/33 30/33 33 36
Refrigerant type R22 g R22/550 R22/560 R22/580 R22/700 R22/730 R22/860
Design pressure MPa 2.6 2.6 2.6 2.6 2.6 2.6
Refrigerant piping Liquid side/ Gas side mm(inch) 6.35/ 9.53 6.35/ 9.53 6.35/ 9.53 6.35/9.53 6.35/ 12.7 6.35/12.7
Max. refrigerant pipe length m 10 10 10 10 10 10
Max. difference in level m 5 5 5 5 5 5
Connection wiring No No No No No No
Plug type 10A 10A 10A 10A 16A 16A
Thermostat type Electronic control Electronic control Electronic control Electronic control Electronic control Electronic control
Operation temp 17-30 17-30 17-30 17-30 17-30 17-30
Ambient temp 18 - 45 --7-45 18-45 --7-45 18-45 --7-45
Application area m2 10-14 10-14 14-21 14-21 18-26 18-26
1 The noise date is base on hemi-anechoic chamber, during actual operation, these values are normally somewhat different as a result of ambient condition.
3
3.Dimensions
3.1 Indoor unit
MSF3-07CR, MSF3-07HR, MSF3-09CR, MSF3-09HR, MSF3-12CR, MSF3-12HR
3.2 Outdoor unit
MSF3-07CR, MSF3-07HR, MSF3-09CR, MSF3-09HR
3.3 Outdoor unit
MSF3-12CR, MSF3-12HR
4
4.Refrigeration cycle diagram
5
5. Operation limits
5.1 Cooling mode
Indoor temperature: 21 32
Outdoor temperature: 15 43
5.2 Heating mode
Indoor temperature: 20 27
Outdoor temperature: -7 24
5.3 Dry mode
Indoor temperature: 10 32
Outdoor temperature: 15 43
6
6.Wiring diagram
6.1 Cooling only
7
6.2 Heating/cooling
8
7.Troubleshooting
7.1 For all cooling only model
Failure phenomenon Operation lamp Timer lamp
Indoor fan speed has been out of control for over 1 minute X
Indoor room temp. or evaporator sensor is open circuit or short circuit On
Over current protection of the compressor occurs 4 times X
EEPROM error On
No over-zero signal
r Extinguish
Flash at 5Hz
7.2 For all heat pump model
Failure phenomenon Operation lamp Timer lamp Defrosting lamp
Over current protection of the compressor occurs 4 times X
Indoor fan speed has been out of control for over 1 minute X
No over-zero signal
Temp. sensor on indoor evaporator is open circuit or short circuit X X
Indoor room temp. sensor is open circuit or short circuit X X
EEPROM error On X
r Extinguish
Flash at 5Hz
9
8. Electric control functions
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.
8.1.8 Compressor: single-phase power supply. Its normal working amp is less than 15A
8.2 Proper symbols and their meanings:
TA: Indoor ambient temperature
TE: Indoor evaporator temperature
TS: Setting temperature through the remote controller
I3sec: Self-protection amp of compressor, continue three seconds until turns off the compressor.
I5MIN: Self-protection amp of compressor, continue five minutes until turns off the compressor.
IFAN: Self-protection amp of outdoor fan/indoor fans when they change from higher wind to lower
wind.
IRESTORE: Amp self-protection return value
THDEFROST: High wind, defrosting temperature difference
TMDEFROST: Middle wind, defrosting temperature difference
TLDEFROST: Low wind, defrosting temperature difference
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
TE7: Evaporator high temperature protection, compressor off temperature
TE8: Evaporator high temperature protection, fan off temperature
TE9: Evaporator high temperature protection, restoring temperature
1.3 Systematic functions
Remote receiving
Testing and forced run
Position set for indoor unit wind flap.
LED displaying and alarm
On or off Timer
Protection for the compressor
Current protection
High temperature protection of indoor heat exchanger at heating mode
Auto defrosting and heating recovery at heating mode
Anti-cold air at heating mode
Anti-frozen at heating mode
1.4 Protection
1.4.1 The compressor functions protection with a delay of three minutes.
10
1.4.2 Sensor protection at open circuit and breaking disconnection
1.4.3 Temperature Fuse break protection
1.4.4 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 unit stops and LED displays
failure information and can't returns to normal operation automatically.
1.4.5 Cross Zero signal error warning. If there is no Cross Zero signals in 4 minutes(4
seconds in quick check), the unit stops and LED displays failure information and
can't returns to normal operation automatically.
1.4.6 The current protection of the compressor.
1.4.7
Condition Indoor fan Compressor Outdoor fan Remark
Current up I< IRESTORE On On On
IRESTORE Low speed On On Cooling mode
IFAN I5MIN Current I5MIN down IFAN IRESTORE Low speed On On Cooling mode
I< IRESTORE On On On
If compressor turns off for continuously 4 times due to Current protection in 5 minutes
from Compressor On, the unit stops and LED displays failure information and can't
returns to normal operation automatically.
1.5 Fan-only mode
Fan speed can be set to high/mid/low/ Auto.
1.6 Cooling mode
The 4-way valve is closed at cooling mode.
The action of the compressor and the outdoor fan:
Condition Compressor Outdoor fan
Temp. up T> Ts+1 On On
T Temp. down T> Ts On On
T Auto fan
Condition Indoor fan speed
T=Indoor Temp.-Setting Temp.
Temp. up T<3 Low
3 T>5 High
Temp. down T> 3 High
1 T<1 Low
11
Anti-freezing control to indoor evaporator ( T: evaporator temp. )
Condition Compressor Outdoor fan
Temp. Time
Temp. up T> TE6 On On
T< TE6 >5 Minutes Off Off
Temp. down T> TE5 On On
T< TE5 Off Off
1.7 Dehumidifying mode
8.7.1 The 4-way valve is off at dehumidifying mode
8.7.2 Compressor and Indoor Fan actions in dehumidifying mode
NO Conditions Indoor Fan Compressor and Outdoor Fan
LOW ON 6 minutes
1 TA TS+2
BREEZE OFF 4minutes
LOW ON 5minutes
2 TS TA TS+2
BREEZE OFF 5minutes
LOW ON 4minutes
3 TA TS
BREEZE OFF 6minutes
Repeat on and off cycle.
8.7.3 Low room temperature protection:, When room temperature decreases to below 10 ,
compressor and outdoor fan will stop(indoor fan is Breeze). Dehumidifying operation will
be resumed when room temperature restores to over 13 .
1.8 Heating mode
1.8.1 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.
1.8.2 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.
1.8.3 Action of compressor at heating mode: compressor must run for 7 minutes after
starting and then judge temperature. Meanwhile other protections are still valid.
Condition Compressor Outdoor fan
Room temp. up T> Ts+3 Off Off
T Room temp. down T< Ts+2 On On
T>Ts+2 Off Off
1.8.4 Indoor Fan actions at heating mode
Indoor Fan can be set at HIGH/MID/LOW/AUTO by using a remote controller, but
Anti-cold wind function prevails.
12
Condition Indoor fan speed
T= Indoor exchanger temp.
Indoor exchanger temp. up T TE1 T>TE2 Setting fan speed
Indoor exchanger temp. down T> TE3 Setting fan speed
TE3 T
Auto wind
Condition Indoor fan speed
T=Indoor Temp.-Setting Temp.
Room temp. up T<2 High
T>2 Med.
Room temp. down T> 0 Med.
T<0 High
Indoor evaporator high-temperature protection
Condition Compressor Outdoor fan
T= Indoor exchanger temp.
Indoor exchanger temp. up T TE8 T>TE7 Off Off
Indoor exchanger temp. down T>TE9 Off Off
T
1.9 Defrosting operation (Available for heating only).
1.9.1 Defrosting condition: Defrosting starts when either of the following & :
A and B are satisfied:
A: The compressor keeps running for 40 minutes or more.
B: The temperature difference of evaporator and room temperature meets one of the
following:
Temp. of evaporator---room temp.
Fan speed is high THDEFROST
Fan speed is mid TMDEFROST
Fan speed is low TLDEFROST
Breeze Meet only if it is Breeze
Calculate from the end of latest defrost, evaporator high temp. protection only closes
outdoor fan with the compressor still running. Add up to 90 minutes.
13
1.9.2 Defrosting time
If the temp. difference condition is satisfied for less than 40 minutes, this can be
regarded as severe frosting. The defrosting time is 10 minutes.
If the temp. difference condition is satisfied for more than 40 minutes, the defrosting
time is 6 minutes.
If the temp. difference condition is satisfied out of 40 minutes, generally the defrosting time is 6
minutes, after three continuous 6-minute defrosting time, the fourth defrosting time is 10 minutes .
The circulation is as following:
6-minute defrost 6-minute defrost 6-minute defrost 10-minute defrost
8.9.3 Ending condition of defrosting
If one of following conditions is satisfied, end the defrost and turn into heating mode:
The defrost time has reached to 6 or 10 minutes.
The compressor current has reached to IDEFROST or above, IDEROST differs in different
models.
8.9.4 Defrosting Actions:
Defrost 10or 6minutes
45S 25S
Compressor
4-way Valve 23S
40S
Outdoor Fan
Indoor Fan
10S
8.10 Automatic operation mode
When running in automatic mode, the air conditioner automatically selects one of the following
operation modes: cooling, heating or fan only according to the temp. 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 (air-only for cooling only type)
at auto mode, the indoor fan blows automatically in selected mode.
8.11 Forced cooling function
A: Select forced cooling function with the forced cooling button or the switch.
B: The compressor is unconditionally turned on, after 30 minutes cooling operation whose fan
14
mode is set as low, the A/C operates at DRY mode with a set temp. of 24 .
C: All protections of remote control cooling are available at forced cooling operation.
8.12 Forced Auto function
A: Select forced auto function with the forced auto button or the switch.
B: In forced auto status the A/C operates at remote control mode with a set temp. of 24 .
8.13 Timer Function
8.14 Economic Running
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.
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 priority over all).
Auto: The economic running function operates in accordance with the selected running
mode by the auto mode.
8.15 Models and Parameters
Model MSF3-07C MSF3-07HR MSF3-09CR MSF3-09HR MSF3-12CR MSF3-12HR
I3SEC 8.5A 8.5A 10.0A 10.0A 11.0A 11.0A
I5MIN 6.2A 6.2A 7.5A 7.5A 10.0A 10.0A
IFAN 5.2A 5.2A 5.5A 5.5A 8.0A 8.0A
IRESTORE 4.2A 4.2A 4.5A 4.5A 6.0A 6.0A
IDEFROST 3.2A 4.5A 5.5A
TE1 28 28 28
TE2 32 32 32
TE3 30 30 30
TE4 20 20 20
TE5 2 2 2 2 2 2
TE6 7 7 7 7 7 7
TE7 60 60 60
TE8 53 53 53
TE9 50 50 50
ANGLCOOL 0 200 0 200 0 200
ANGLHEAT 45 45 45
ANGLOFF 100 100 100 100 100 100
THDEFROST 14 14 14
TMDEFROST 15 15 15
TLDEFROST 16 16 16
15