GD Midea Refrigeration Equipment Co. Ltd
MULTI SPLIT TYPE, HEAT PUMP AIR CONDITIONERS
Technical service manual 2007
R407C Glory multi Series
R series service manual
Indoor Models
Outdoor Models
MSGI-09HRN2
MSGI-12HRN2
M2OA-18HRN2 M2OA-21HRN2
M3OA-27HRN2 M3OA-30HRN2
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R series service manual
Multi SERIES
1. Features
2. Function
3. Specification
4. Dimensions
5. Refrigeration cycle diagram
6. Wiring diagram
7. Troubleshooting
8. Electronic function
9. Characteristic of temp. sensor
215
1. Features
p
1.1 Universal outdoor unit and indoor unit design
1.2 R410a refrigerant; Cooling & heating units
1.3 The indoor unit combination is as follow list:
OUTDOOR UNIT MODEL INDOOR UNIT COMBINATION
M2OA-18HRN1 9K×2
M2OA-21HRN1 9K+12K
M3OA-27HRN1 9K×3
M3OA-30HRN1 9K×2+12K
1.4 Working Temperature Range
R series service manual
Models
multi
on/off
2.Function
Indoor unit
Cooling Heating
Indoor Low Indoor Hi Outdoor Low Outdoor Hi Indoor Low Indoor Hi
17 / 5 43 / 30
Operation ON/OFF by remote controller
Sensing by room temperature
Room temperature sensor.
Pipe temperature sensor.
Room temperature control
Maintain the room temperature in accordance with the setting temperature.
Starting temperature con trol
Outdoor Low Outdoor Hi
-7 24
Indoor fan is delayed for 5 sec at the starting.
Indoor fan speed control
high, med, low, breeze.
Operation indication Lamps (VLED)
Light up in the VLED for each operation mode.
Two-direction air vane
The unit will decide the louver direction according to operation mode.
Sleep mode auto control
The fan is turn to low speed (cooling/heating).
The unit will be turn off at the seventh hour.
Independent dehumidification
The function is usually used in rainy days in
s
ringtime or damp areas.
216
Turbo mode
Anti-cold function
Prevent the cold wind at
the beginning of unit start.
Defrost mode
Auto-restart function
Air flow Direction control
The function will be
Self-diag. function
operate in any operation
Outdoor unit
Power relay control
The unit has 3 mins delay between continuously ON/OFF operations.
Check point
Hydrophilic aluminum fin
The hydrophilic fin can improve the heating efficiency at operation mode.
4 way valve control
It is only operated in the heating operation mode except defrosting operation.
Discharge pipe temperature protect
R series service manual
Anti-rust cabinet
3. Specification
3.1 Indoor unit
Model MSGI-09HRN2 MSGI-12HRN2
Power supply Ph-V-Hz 1Ph,220-240V~,50Hz 1PH, 220-240V~,50Hz
Capacity Btu/h 9000 12000
Cooling
Heating
Indoor
fan motor
Indoor
coil
Indoor air flow (Hi/Mi/Lo) m3/h 510/460/410 660/580/500
Indoor noise level (Hi/Mi/Lo) dB(A) 36/34/32 39/33/28
Indoor
unit
Input W 38.5 39
Rated current A 0.18 0.20
Capacity Btu/h 10000 13000
Input W 38.5 39
Rated current A 0.18 0.20
Model RPG13H RPG13H
Brand Welling Welling
Input W 36 36
Capacitor uF 1.2 1.2
Speed(hi/mi/lo) r/min 1180/1080/1000 1250/1100/950
a.Number of rows 2 2
b.Tube pitch(a)x row pitch(b) mm 21X13.37 21X13.37
c.Fin spacing mm 1.3 1.3
d.Fin type (code) Hydrophilic aluminium Hydrophilic aluminium
e.Tube outside dia.and type mm
f.Coil length x height x width mm 578X252X26.74 578X252X26.74
g.Number of circuits 2 2
Dimension (W*H*D) mm 750×250×188 750×250×188
Packing (W*H*D) mm 830X336X280 830X336X280
Net/Gross weight Kg 8.5/10.5 8.5/10.5
Liquid side/ Gas side mm(inch)
Ф7, Innergroove tube Ф7, Innergroove tube
Ф6.35/Ф9.53 Ф6.35/Ф12.7
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3.2 Outdoor unit
Model M2OA-18HRN2 M2OA-21HRN2
Power supply Ph-V-Hz 1Ph,220-240V~,50Hz 1Ph,220-240V~,50Hz
Capacity Btu/h 9000X2 9000+12000
Cooling
Heating
Energy class D CLASS D CLASS
Max. input consumption W 2860 3400
Max. current A 13 15.0
Starting current A 19.8 19.8+30
Compressor
Outdoor fan
motor
Outdoor coil
Outdoor air flow m3/h 1900 2070
Outdoor noise level dB(A) 58 58
Outdoor
unit
Refrigerant type g R407C/800X2 R407C/750+1000
Design pressure(Hi/Lo) MPa 2.8/1.2 2.8/1.2
Refrigerant
piping
Connection wiring No No
Plug type No No
Thermostat type Electronic control Electronic control
Operation temp ℃ 17-30 17-30
Ambient temp ℃ 18~43(cooling); -7~24(heating)
Input W 1980 2300
Rated current A 9.61 10.22
EER w/w.h 2.63 2.68
Capacity Btu/h 10000X2 10000+13000
Input W 2000 2350
Rated current A 9.78 11.5
COP W/W.H 2.90 2.85
Model
Type Rotary Rotary
Brand GD TOSHIBA GD TOSHIBA
Capacity Btu/h 10800 10800;13650
Input W 1000 1000;1310
Rated current(RLA) A 4.4 4.4;6.1
Locked rotor Amp(LRA) A 24 24;31
Thermal protector Internal Internal
Capacitor uF 25+25 25+35
Refrigerant oil ml 400 400;480
Model YDK69-6 YDK69-6
Brand WeiLing Welling
Input W 154 154
Capacitor uF 4 4
Speed r/min 900/670 900/670
a.Number of rows 2 2
b.Tube pitch(a)x row
c.Fin spacing mm 1.7 1.7
d.Fin type (code) Hydrophilic aluminium Hydrophilic aluminium
e.Tube outside dia.and
f.Coil length x height x
g.Number of circuits 12 12
Dimension(W*H*D) mm 895X345X655 895X345X655
Packing (W*H*D) mm 1050X470X780 1050X470X780
Net/Gross weight Kg 73/77 79/83
Liquid side/ Gas side mm Ф6.35/Ф9.53;
Max. refrigerant pipe
Max. difference in level m 10(each unit) 10(each unit)
mm 25.4X22 25.4x22
mm Ф9.53, Innergroove tube Ф9.53, Innergroove tube
mm 810X610X44 810X610X44
m 10(each unit) 10(each unit)
PG180X1C-4DZDE3;
PG180X1C-4DZDE3
PG180X1C-4DZDE3;
PG225X2C-4FT
Ф6.35/Ф9.53;
Ф6.35/Ф12.7
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Model M3OA-27HRN2 M30A-30HRN2
Power supply Ph-V-Hz 1Ph,220-240V~,50Hz 1Ph,220-240V~,50Hz
Capacity Btu/h 9000x3 9000x2+12000
Cooling
Heating
Energy class D CLASS D CLASS
Max. input consumption W 4000 4000
Max. current A 18.2 18.2
Starting current A 40+30 40+30
Compressor
Outdoor fan
motor
Outdoor coil
Outdoor air flow m3/h 1450x2 1450x2
Outdoor noise level dB(A) 60 60
Outdoor
unit
Refrigerant type g R407C/ 1470+820 R407C 1470+820
Design pressure(Hi/Lo) MPa 2.8/1.2 2.8/1.2
Refrigerant
piping
Connection wiring No No
Plug type No No
Thermostat type Electronic control Electronic control
Operation temp ℃ 17~30 17~30
Ambient temp ℃ 18~43(cooling); -7~24(heating)
Input W 2990 3320
Rated current A 14.50 16.13
EER w/w.h 2.61 2.62
Capacity Btu/h 10000X3 10000x2+13000
Input W 3050 3360
Rated current A 14.90 16.3
COP W/W.H 2.85 2.86
Model
Type Rotary Rotary
Brand GD TOSHIBA GD TOSHIBA
Capacity Btu/h 18080; 13650 18080; 13650
Input W 1760; 1310 1760; 1310
Rated current(RLA) A 8.5; 6.1 8.5; 6.1
Locked rotor Amp(LRA) A 44, 31 44, 31
Thermal protector Internal Internal
Capacitor uF 35+35 35+35
Refrigerant oil ml 750; 480 750; 480
Model YDK50-4G1 YDK50-4G1
Brand Welling Welling
Input W 107Wx2 107Wx2
Capacitor uF 4uFx2 4uFx2
Speed r/min 1150 1150
a.Number of rows 2 2
b.Tube pitch(a)x row pitch(b) mm 25.4x22 25.4x22
c.Fin spacing mm 1.5 1.5
d.Fin type (code) Hydrophilic aluminium Hydrophilic aluminium
e.Tube outside dia.and type mm Ф9.53, Innergroove tube Ф9.53, Innergroove tube
f.Coil length x height x width mm 813X812X44 813X812X44
g.Number of circuits
Dimension(W*H*D) mm 860X830X330 860X830X330
Packing (W*H*D) mm 1000X985X425 1000X985X425
Net/Gross weight Kg 90/94 90/94
Liquid side/ Gas side mm Ф6.35/Ф9.53;
Max. refrigerant pipe length m 10 (each unit) 10 (each unit)
Max. difference in level m 10 (each unit) 10 (each unit)
PG295X2CS-4KU1;
PG225X2C-4FT
5(A System);
PG295X2CS-4KU1;
PG225X2C-4FT
5(A System);
Ф6.35/Ф9.53;
Ф6.35/Ф12.7
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4 Dimension
4.1 Indoor unit dimension
Mode
R series service manual
Dimension
W H D
9K
12K
750 250 188
750 250 188
220
4.2 Outdoor unit dimension
a) Outdoor unit 18K/21K
R series service manual
b) Outdoor unit 27K/30K
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5. Refrigeration cycle diagram
“1 drives 3 system” is made up of one “1 drive 1 system” and one “1 drive 2 system”.
SV2
SV1
PMV1
PMV2
2＃
1＃ T2
T1
Compressor
refrigeration distributor
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
Notice：For 1 drives 2 system, there are two individual refrigerant circuit and two compressors, but for the 1drive 2
system in the 1 drive 3 system, there is only one refrigerant circuit and only one compressor.
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6. Wiring diagram
6.1 Indoor unit
Indoor unit
R series service manual
Glory indoor unit
223
6.2 Outdoor unit
R series service manual
For 1 drive 2 outdoor unit
224
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For 1 drive 3 outdoor unit
225
7. Troubleshooting
7.1 Indoor unit
Failure phenomenon Operation lamp Timer lamp
Indoor fan speed has been out of control for over 1 minute
Indoor room temp. Sensor or evaporator temp. Sensor is open circuit
or short circuit
EEPROM error On
Cross zero signal error
r Extinguish
☆ 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
7.3 Diagnostic chart
7.3.1Indoor fan speed has been out of control for over 1 minute
☆
☆
☆ ☆
☆ ☆
☆
X
On
☆
R series service manual
Is the indoor fan motor
connector and connection
good?
YES
Is voltage being applied to
the fan motor?
(rang 90v-160v between mid
pin and N on CN1
NO
NO
YES
Repair the connector and
reconnect
Indoor PCB is defective.
Replace the indoor PCB.
Replace the indoor fan motor
7.3.2 Indoor room temp. sensor or evaporator temp. sensor is open circuit or short circuit
Is the indoor fan motor
connector and connection
good?
YES
Is voltage being applied to
the fan motor?
(rang 90v-160v between mid
pin and N on CN1
NO
YES
Repair the connector and
reconnect
Indoor PCB is defective.
Replace the indoor PCB.
NO
Replace the indoor fan motor
226
7.2.3 EEPROM error
R series service manual
Circuit or software error on indoor
7.2.4 Cross zero signal error
Is connection to connector of pipe temp. sensor good?
Yes
Check the resistance of the temp. sensor according to Annex 1
Replace the sensor
Is power supply and
connection of connectors
good?
NO
Replace indoor PCB
No
Repair connector
Be sure the power supply is good
and correct the connection
YES
Indoor PCB is defective. Replace
the indoor PCB.
7.2.5 High temp. Protect of condenser
When outdoor pipe temp. is more than 65°C, the unit will stop, and unit runs again when outdoor pipe
temp. less than 52°C.
Is the temp. more than 65°C ?
No
Is the temp sensor right according to the annex 1
Yes
Replace the outdoor main board
Replace the temp sensor
No
7.2.6 Temp. Sensor in condenser is open circuit or short circuit
Is the outdoor temperature
sensor connector and
connection good?
NO
Repair the connector and
reconnect
YES
Replace the sensor and
check if E5 display again?
YES
227
Replace outdoor e-box
8 Electronic functions
8.1 Electric Control working environment
8.1.1 Input voltage: 175~253V
8.1.2 Input power frequency: 50Hz/60Hz
8.1.3 Ambient temperature: -7°C~+43°C
8.1.4 Indoor fan normal working amp is less than 1A,
8.1.5 Outdoors 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 Display board
R series service manual
Operation
The indicator flashes once every second after power is on and illuminates when the air
conditioner is in operation.
Timer indicator:
The indicator illuminates then TIMER is set ON.
PRE-DEF. indicator (For cooling & heating mode only)
The air conditioner starts defrosting automatically if outdoor unit frosts in heating operating.
At this time, PRE-DEF. indicator illuminates.
Auto indicator:
This indicator flashes when the air conditioner is in AUTO operation.
ECON indicator
This indicator illuminates while the air conditioner is in economic operation.
8.2 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
TE7: Evaporator high temperature protection, compressor off temperature
TE8: Evaporator high temperature protection, fan off temperature
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R series service manual
TE9: Evaporator high temperature protection, restoring temperature
T3: Outdoor unit pipe sensor
T4: Outdoors temperature sensor
8.3 Systematic functions.
Remote receiving.
Testing and forced run.
Position set for indoor unit wind vane.
LED display 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.
8.4 Protection
8.4.1 The compressor functions protection with a delay of three minutes.
8.4.2 High temp. protection of condenser.
8.4.3 Sensor protection at open circuit and breaking disconnection
8.4.4 Temperature Fuse break protection
8.4.5 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.
8.5 Fan-only mode
Fan speed is high/mid/low/ Auto
8.6 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 On Temp. up
TA<Ts+1 Off Off
TA> Ts On On Te m p . d o w n
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.
Temp. up
Temp. down
T<3℃ Low
3<T<5℃℃ Med.
T>5℃ High
T> 3℃ High
1<T<3℃℃ Med.
T<1℃ Low
Indoor fan speed
Anti-freezing control to indoor evaporator under cooling mode
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Condition
Temp. Time
T> TE6 On On Temp. up
T< TE6 >5 Minutes Off Off
T> TE5 On On Temp. down
T< TE5 >5 Minutes Off Off
Compressor Outdoor fan
Condenser high-temperature protection under heating mode
T3 >65 ,turn off com℃ pressor.
TE5: Evaporator low temperature protection entering temperature
TE6: Evaporator low temperature protection restoring temperature
8.7 Dehumidifying mode
8.7.1 The 4-way valve is off in dehumidifying mode
8.7.2 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
compressor, indoor fan run 5 minutes in low speed. And repeat on and off cycle.
8.7.3 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 .℃
8.7.4 Under dehumidifying mode, the anti-freezing function of the indoor heat exchanger is the
same as that of cooling mode.
8.8 Heating mode
8.8.1 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.
8.8.2 Generally, the outdoors fan is turned off with the on-off action of compressor in heating
mode, except for the defrosting mode or the end of defrosts.
8.8.3 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 Off Room temp. up
TA<Ts+3 On On
TA< Ts+2 On On Room temp. down
TA>Ts+2 Off Off
TA: Indoor ambient temperature
TS: Setting temperature through the remote controller
8.8.4 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
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R series service manual
Indoor exchanger temp. up
Indoor exchanger temp. down
TE<TE1 Off
TE1<TE<TE2 Breeze
TE>TE2 Setting fan speed
TE> TE3 Setting fan speed
TE3<TE<TE4 Breeze
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
8.8.5 Auto wind under heating mode
Condition
T=Indoor Temp.-Setting Temp.
T<2℃ High Room temp. up
T>2℃ Med.
T> 0℃ Med. Room temp. down
T<0℃ High
Indoor fan speed
8.8.6 Indoor evaporator high-temperature protection under heating mode
Condition Compressor Outdoor fan
Indoor exchanger temp. up
TE<TE8 On On
TE8<TE<TE7 On Off
TE>TE7 Off Off
TE>TE9 Off Off Indoor 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
8.9 Defrosting operation (Available for heating only).
8.9.1 Defrosting condition:
When T3<0 and compressor runs 40 minutes.℃
T3: Temp. of condenser.
8.9.2 Ending condition of defrost
If one of following conditions is satisfied, end the defrosting 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
231
Compressor
ON
ON
4-way Valve
OFF
Outdoor Fan
ON
R series service manual
OFF
8.10 Automatic operation mode
8.10.1 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)
8.10.2 The indoor fan blows automatically in corresponding selected mode.
8.10.3 The motion of indoor fan’s vane should accord with the selected operation mode.
8.10.4 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.
8.11 Forced cooling function
8.11.1 Select forced cooling function with the forced cooling button or the switch.
8.11.2 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 .℃
8.11.3 All protections of remote control cooling are available under forced cooling operation.
8.12 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 .℃
8.13 Timer Function Requirement
The maximum length of timer is 24 hours and the minimum resolving power is 15
minutes.
8.14 Economic Running
8.14.1 The economic running function is available under cooling, heating or auto mode.
8.14.2 Cooling:
232
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.
8.14.3 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).
8.14.4 Auto:
The economic running function operates in accordance with the selected running mode
by the auto mode.
8.15 Mode conflict
The indoor units can not work cooling mode and heating at same time.
Heating mode has a priority.
8.16.1Definition
Cooling mode Heating Mode Fan Off
Cooling mode No Yes No No
Heating Mode Yes No Yes No
Fan No Yes No No
Off No No No No
R series service manual
No: No mode conflict;
Yes: Mode conflict
233
9 Characteristic of temp. sensor
Temp.℃ Resistance KΩ Temp.℃ Resistance KΩ Temp.℃ Resistance KΩ
-10 62.2756 17 14.6181 44 4.3874
-9 58.7079 18 13.918 45 4.2126
-8 56.3694 19 13.2631 46 4.0459
-7 52.2438 20 12.6431 47 3.8867
-6 49.3161 21 12.0561 48 3.7348
-5 46.5725 22 11.5 49 3.5896
-4 44 23 10.9731 50 3.451
-3 41.5878 24 10.4736 51 3.3185
-2 39.8239 25 10 52 3.1918
-1 37.1988 26 9.5507 53 3.0707
0 35.2024 27 9.1245 54 2.959
R series service manual
1 33.3269 28 8.7198 55 2.8442
2 31.5635 29 8.3357 56 2.7382
3 29.9058 30 7.9708 57 2.6368
4 28.3459 31 7.6241 58 2.5397
5 26.8778 32 7.2946 59 2.4468
6 25.4954 33 6.9814 60 2.3577
7 24.1932 34 6.6835 61 2.2725
8 22.5662 35 6.4002 62 2.1907
9 21.8094 36 6.1306 63 2.1124
10 20.7184 37 5.8736 64 2.0373
11 19.6891 38 5.6296 65 1.9653
12 18.7177 39 5.3969 66 1.8963
13 17.8005 40 5.1752 67 1.830
14 16.9341 41 4.9639 68 1.7665
15 16.1156 42 4.7625 69 1.7055
16 15.3418 43 4.5705 70 1.6469
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