AirQ MSM-09HRN1 User manual

SERVICE MANUAL
AirQ AIRCONDITIONER
MULTI SPLIT TYPE
MSM-09HRN1
MSM-12HRN1
MSM-30HRN1
V1.0
Dec, 2007

4/8/2008R series service manual
PAGE 1 OF 20
Multi SERIES
1. Features ……………………………………………………………………….2
2. Function ……………………………………………………………………….2
3. Specification …………………………………………………………………..3
4. Dimensions ……………………………………………………………………6
5. Refrigeration c cle diagram …………………………………………………8
6. Wiring diagram ………………………………………………………………..9
7. Troubleshooting ……………………………………………………………….12
8. Electronic function …………………………………………………………….14
9. Characteristic of temp. sensor ……………………………………………..20

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PAGE 2 OF 20
1. Features
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
MSM-18HRN1 9K×2
MSM-21HRN1 9K+12K
MSM-27HRN1 9K×3
MSM-30HRN1 9K×2+12K
1.4 Working Temperature Range
Cooling Heating
Models
Indoor Low Indoor Hi Outdoor Low Outdoor Hi Indoor Low Indoor Hi
Outdoor Low Outdoor Hi
multi
on off 17 / 5 43 / 30
-7 24
2.Function
The function will be
operate in an operation
mode.
Indoor unit
Operation ON OFF by remote controller
Room temperature sensor.
Pipe temperature sensor.
Sensing by room temperature
Maintain the room temperature in accordance with the setting temperature.
Room temperature control
Indoor fan is dela ed for 5 sec at the starting.
Starting temperature control
high, med, low, breeze.
Indoor fan speed control
Light up in the VLED for each operation mode.
The unit will decide the louver direction according to operation mode.
Two-direction air vane
The fan is turn to low speed (cooling/heating).
The unit will be turn off at the seventh hour.
Sleep mode auto control
The function is usuall used in rain da s in
springtime or damp areas.
Independent dehumidification
Operation indication Lamps (VLED)
Air flow Direction control
Self-diag. function
Defrost mode
Prevent the cold wind at
the beginning of unit start.
Anti-cold function
Auto-restart function
Turbo mode

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3. Specification
3.1 Indoor unit
Model MSM-09HRN1 MSM-12HRN1
Power suppl Ph-V-Hz 1ph-220-224V~-50Hz 1ph-220-224V~-50Hz
Capacit
Btu/h 8500 11000
Input W 51.5 51.5
Cooling
Rated current A 0.24 0.24
Capacit Btu/h 9000 12000
Input W 51.5 51.5
Heating
Rated current A 0.24 0.24
Model RPG20E RPG20E
Brand Welling Welling
Input W 45 45
Capacitor uF 1.5 1.5
Indoor fan
motor
Speed(hi/mi/lo) r/min 1260/1210/1100/1000 1260/1210/1100/1000
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 t pe (code) H drophilic aluminium H drophilic aluminium
e.Tube outside dia.and t pe mm φ7, innergroove tube φ7, innergroove tube
f.Coil length x height x width mm 538X252X26.74 538X252X26.74
Indoor coil
g.Number of circuits 2 2
Indoor air flow (Hi/Mi/Lo) m3/h 380 550
Indoor noise level (Hi/Mi/Lo) dB(A) 39/36/32 43/41/35
Dimension (W*H*D) mm 790X190X275 790X190X275
Packing (W*H*D) mm 865x265x350 865x265x350
Indoor unit
Net/Gross weight Kg 8.5/10 9/11
The unit has 3 mins dela between continuousl ON/OFF operations.
Outdoor unit
Power relay control
The h drophilic fin can improve the heating efficienc at operation mode.
Hydrophilic aluminum fin
It is onl operated in the heating operation mode except defrosting operation.
Discharge pipe temperature protect
Anti-rust cabinet
4 way valve control
Check point

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Liquid side/ Gas side mm Ф6.35/Ф9.53 Ф6.35/φ12.7
3.2 Outdoor unit
Outdoor Model MSM-18HRN1 MSM-21HRN1
Power suppl Ph-V-Hz 1Ph,220-240V~,50Hz 1Ph,220-240V~,50Hz
Capacit
Btu/h 18000 21000
Capacit W 5275 6155
Input W 1680 2000
Rated current A 8.0 9.7
Cooling
EER w/w 3.1 3.04
Capacit
Btu/h 20000 24000
Capacit
W 5862 7034
Input W 1680 2050
Rated current A 8.0 9.8
Heating
EER w/w 3.45 3.42
Max. input power W 2280 2520
Max. current A 9.8 12.0
Starting current A 21.7 21.7
Model
PA108X1C-4FTDE ;
PA108X1C-4FTDE
PA108X1C-4FTDE ;
PA145X2C-4FT
T pe ROTARY ROTARY
Brand TOSHIBA TOSHIBA
Capacit Btu/h 8769 X 2 8769+12014
Input W 885X2 885+1200
Rated current(RLA) A 4.15X2 4.15+5.6
Locked rotor Amp(LRA) A 40X2 40+57
Thermal protector
Internal Internal
Capacitor uF 25uF/370VAC X 2 25+35uF/370VAC
Compressor
Refrigerant oil ml 350X2 350+480
Model YDK60-6 YDK60-6
Brand Welling Welling
Input W 111 111
Capacitor uF 4uFx2 4uFx2
Outdoor fan
motor
Speed r/min 830/650 830/650
a.Number of rows 2 2
b.Tube pitch(a)x row pitch(b)
mm 25.4x24 25.4x24
c.Fin spacing
mm 1.7 1.7
d.Fin t pe (code) H drophilic aluminium H drophilic aluminium
e.Tube outside dia.and t pe mm Ф9.53, Innergroove tube Ф9.53, Innergroove tube
f.Coil length x height x width
mm 810X610X44 810X610X44
Outdoor coil
g.Number of circuits
2/2 2/2
Outdoor air flow m3/h 2200 2200
Outdoor noise level dB(A) 56 56
Dimension(W*H*D) mm 895X655X345 895X655X345
Packing (W*H*D) mm 1050X780X470 1050X780X470
Outdoor
unit
Net/Gross weight Kg 76/82 76/82
Refrigerant t pe R410A g 980X2 900+1100
Design pressure(Hi/Lo) MPa 4.4/2.0 4.4/2.0
Liquid side/ Gas side mm(inch) Ф6.35/Ф9.53 Ф6.35/Ф9.53; Ф6.35/Ф12.7
Max. refrigerant pipe length
m 15 15
Refrigerant
piping
Max. difference in level
m 10 10
Connection wiring No
Plug t pe No

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Thermostat t pe
Electronic control
Operation temp ℃ 17-30
Ambient temp ℃ 18~43(cooling); -7~24(heating)
Outdoor Model MSM-27HRN1 MSM-30HRN1
Power suppl Ph-V-Hz 1Ph,220-240V~,50Hz 1Ph,220-240V~,50Hz
Capacit
Btu/h 27000 30000
Capacit
W 7913 8792
Input W 2570 2880
Rated current A 13.1 13.7
Cooling
EER w/w
3.03 3.02
Capacit
Btu/h 30000 34000
Capacit
W 8792 9965
Input W 2700 3070
Rated current A 13.3 14.2
Heating
EER w/w 3.22 3.22
Max. input power W 3600 3600
Max. current A 16.6 16.6
Starting current A 31.8 31.8
Model
PA200X2CS-4KU1；
PA145X2C-4FT
PA200X2CS-4KU1；
PA145X2C-4FT
T pe ROTARY ROTARY
Brand TOSHIBA TOSHIBA
Capacit Btu/h 16791+12014 16791+12014
Input W 1670+1200 1670+1200
Rated current(RLA) A 7.81+5.6 7.81+5.6
Locked rotor Amp(LRA) A 57+57 57+57
Thermal protector
Internal Internal
Capacitor uF 45+35uF/370VAC 45+35uF/370VAC
Compressor
Refrigerant oil ml 750+480 750+480
Model YDK50-4G1 YDK50-4G1
Brand Welling Welling
Input W 200 200
Capacitor uF 4uFx2 4uFx2
Outdoor fan
motor
Speed r/min 1150 1150
a.Number of rows 2 2
b.Tube pitch(a)x row pitch(b) mm 25.4x24 25.4x24
c.Fin spacing mm 1.7 1.7
d.Fin t pe (code) H drophilic aluminium H drophilic aluminium
e.Tube outside dia.and t pe mm Ф9.53, Innergroove tube Ф9.53, Innergroove tube
f.Coil length x height x width mm 813X812X44 813X812X44
Outdoor coil
g.Number of circuits
3/3 3/3
Outdoor air flow m3/h 3200 3200
Outdoor noise level dB(A) 58 58
Dimension(W*H*D) mm 860X830X330 860X830X330
Packing (W*H*D) mm 1000X985X425 1000X985X425
Outdoor unit
Net/Gross weight Kg 81/90 81/90
Refrigerant t pe R410A g 1550+1150 1550+1150
Design pressure(Hi/Lo) MPa 4.4/2.0 4.4/2.0
Liquid side/ Gas side mm(inch) Ф6.35/Ф9.53
Ф6.35/Ф9.53;
Ф6.35/Ф12.7
Max. refrigerant pipe length m 15 15
Refrigerant
piping
Max. difference in level m 10 10
Connection wiring No
Plug t pe No

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PAGE 6 OF 20
Thermostat t pe
Electronic control
Operation temp ℃ 17-30
Ambient temp ℃ 18~43(cooling); -7~24(heating)
4 Dimension
4.1 Indoor unit dimension
Dimension
Mode W H D
9K 790 275 190
12K 790 275 190

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4.2 Outdoor unit dimension
a) Outdoor unit 18K/21K
b) Outdoor unit 27K/30K

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5. Refrigeration cycle diagram
“1 drives 3 s stem” is made up of one “1 drive 1 s stem” and one “1 drive 2 s stem”.
PMV1
1 drive 2 s stem
SV1：Primar four-wa valve SV2：Secondar four-wa valve PMV1，PMV2：Electronic expansive valve
T1，T2：Indoor pipe temperature sensor
Condenser
Four-wa valve
Evaporator
Compressor
1 drive 1 s stem
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.
PMV2
SV2
SV1
2＃ 1＃
T2
T1
refrigeration distributor
Compressor

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6. Wiring diagram
6.1 Indoor unit

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6.2 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 ☆
Cross zero signal error ☆ ☆
r Extinguish
☆ Flash at 5Hz
On Light
7.2 Outdoor unit (on mainboard)
7.2.1 1 drive 2
Failure phenomenon LED1 LED2 LED3
Stand b ☆ ☆ ☆
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
7.2.2 1 drive 3
Failure phenomenon LED1 LED2 LED3 Sensor in outdoor unit
High temp. protect of condenser ☆ ☆
RT3B or RT3A
RT3A sensor is open circuit or short circuit ☆
RT3A
RT4 sensor is open circuit or short circuit ☆
RT4
RT3B sensor is open circuit or short circuit ☆
RT3B
☆ Flash at 2Hz
7.3 Diagnostic chart
7.3.1Indoor fan speed has been out of control for over 1 minute

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7.3.2 Indoor room temp. sensor or evaporator temp. sensor is open circuit or short circuit
7.2.3 EEPROM error
7.2.4 Cross zero signal error
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 indoor fan motor
connector and connection
good?
Repair the connector and
reconnect
Is voltage being applied to
the fan motor?
(rang 90v-160v between mid
pin and N on CN1
NO
YES
Indoor PCB is defective.
Replace the indoor PCB.
YES
Replace the indoor fan motor
NO
Is the indoor fan motor
connector and connection
good?
Repair the connector and
reconnect
Is voltage being applied to
the fan motor?
(rang 90v-160v between mid
pin and N on CN1
NO
YES
Indoor PCB is defective.
Replace the indoor PCB.
YES
Replace the indoor fan motor
NO
Is power supply and
connection of connectors
good?
Indoor PCB is defective. Replace
the indoor PCB.
Be sure the power supply is good
and correct the connection
NO
YES
Circuit or software error on indoor Replace indoor PCB

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7.2.6 Temp. Sensor in condenser is open circuit or short circuit
Is the outdoor temperature
sensor connector and
connection good?
Repair the connector and
reconnect
Replace the sensor and
check if E display again?
NO
YES
Replace outdoor e-box
YES
Is the temp. more than 65°C ?
Is the temp sensor right according to the annex 1
Replace the outdoor main board
No
Yes
Replace the temp sensor
No

4/8/2008R series service manual
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8 Electronic functions
8.1 Electric Control working environment
8.1.1 Input voltage: 175~253V
8.1.2 Input power frequenc : 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-wa valve normal working amp is less than 1A.
8.1.7 Swing motor: DC12V.
8.1.8 Displa board
 Operation
The indicator flashes once ever 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 onl )
The air conditioner starts defrosting automaticall 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 s mbols 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
TE9: Evaporator high temperature protection, restoring temperature
T3: Outdoor unit pipe sensor
T4: Outdoors temperature sensor

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8.3 S stematic functions.
Remote receiving.
Testing and forced run.
Position set for indoor unit wind vane.
LED displa and alarm.
On or off Timer.
Protection for the compressor.
High temperature protection of indoor heat exchanger in heating mode.
Auto defrosting and heating recover 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 dela 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 displa s failure
information and can’t returns to normal operation automaticall .
8.5 Fan-onl mode
Fan speed is high/mid/low/ Auto
8.6 Cooling mode
The 4-wa 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 Temp. down
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. down
T<1℃ Low
Anti-freezing control to indoor evaporator under cooling mode
Condition
Temp. Time
Compressor Outdoor fan
Temp. up T> TE6 On On

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T< TE6 >5 Minutes Off Off
T> TE5 On On Temp. down
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
8.7 Dehumidif ing mode
8.7.1 The 4-wa valve is off in dehumidif ing mode
8.7.2 Compressor and Indoor Fan actions in dehumidif ing 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 c cle.
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). Dehumidif ing operation will be resumed when room
temperature restores to over 13℃.
8.7.4 Under dehumidif ing 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 Generall , the 4-wa valve is open in heating mode, but it is closed in defrosting mode.
4-wa valve must dela 2 minutes compared with compressor if the compressor changed
into non-heating mode or turned off. 4-wa valve doesn't dela in dehumidif ing mode.
8.8.2 Generall , 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 b using a remote controller, but
Anti-cold wind function has the priorit .
Anti-cold wind control function under heating mode
Condition
TE
Indoor fan speed
TE<TE1 Off Indoor exchanger temp. up
TE1<TE<TE2 Breeze

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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
8.8.5 Auto wind under heating mode
Condition
T=Indoor Temp.-Setting Temp.
Indoor fan speed
T<2℃ High Room temp. up
T>2℃ Med.
T> 0℃ Med. Room temp. down
T<0℃ High
8.8.6 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 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 onl ).
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

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8.10 Automatic operation mode
8.10.1 The air conditioner automaticall 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-onl
TA—TS<-1℃ Heating (Fan-onl for cooling onl t pe)
8.10.2 The indoor fan blows automaticall 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 unconditionall 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 displa
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:
Compressor
4-wa Valve
Outdoor Fan
OFF
OFF
ON
ON
ON