Premier AA-2118 User manual

Service Manual
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SPLIT TYPE CEILING CASSETTE AIR CONDITIONER
Service Manual
AA-2118

Service Manual
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CONTENTS
1. Range & Conditions
Operating Range……………………………………………………………………………...2
Operating Conditions ………………………..……………………………….………….…2
2. Specifications
Unit Specifications………………………………………………………….…………………3
Specifications of Main Parts………………………………………………………………….4
Specifications of Other Parts……………………………… ………………………………..6
3. Functions
Control Functions……………………………………………………………………………..7
Operating Mode……………………………………………………………………………….7
Protect Functions……………………………………………………………………………..9
Other Functions ……………………………………………………………………………..10
Temperature Table of Prevent Point ………………………………………………………12
4. Dimensional Data………………………………………………………………..13
5. Performance Charts……………………………….………………..………….15
6. Refrigerant Flow Diagram…………………………………………….……....16
7. Circuit Diagram
Electrical Wiring Diagram for Indoor Unit…………………………………………………18
Electrical Wiring Diagram for Outdoor Unit…………………………………….………..19
8. Troubleshooting
Check before Troubleshooting……………………………………………….…………….20
Air Conditioner Does Not Work…………………………………………………………….20
Some Parts ofAir Conditioner Do Not Work……………………………………………...22
Air Conditioner Operates, But Abnormalities are Observed. …………………………...24
Sensor is Defective………………………………………………………….………………26
9. Checking Electrical Components. …………………………………………..26

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Technical Data
1.Range & Conditions
1.1 Operating Range
Operating Modes Temperature Indoor Temperature Outdoor Temperature
Max. 32℃DB/27℃WB 43℃DB
Cooling Min. 21℃DB/15℃WB 21℃DB
1.2 Operating Conditions
Rated Operating Conditions
Indoor Temperature Outdoor Temperature
Cooling 27℃DB/19℃WB 35℃DB/24℃WB
Heating 20℃7℃DB/6℃WB
Tubing Length (m) 4.0
Max. Operating Value
Indoor Temperature Outdoor Temperature
Cooling 32℃DB/23℃WB 43℃DB
DB: Dry-bulb temperature
WB: Wet-bulb temperature

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2.Specifications
2.1 Unit Specifications
Power supply 220V～60Hz (single phase)
Ratedvoltage V220
Performance
Rated capacity Btu/h 9000
Aircirculation(High) m
3/h 480
Moistureremoval(High) l/h 1.0
Electrical rating
Voltage range V 198~242
Operatingcurrent A 4.5
Power input W 980
E.E.R / C.O.P W/W 2.65
Features
Controls / Temperature control Microprocessor / I.C thermostat
Control unit Infrared remote control transmitter
Timer ON/OFF 24 hours
Fan speed Indoor /Outdoor High, Medium, Low, Auto /High
Horizontal Manual
Airflow direction Vertical Auto
Air filter Anti-mold, washable
Compressor Rotary-type (Hermetic)
Refrigerant /g R22 / 600
Refrigerant control Capillary tube
Indoor dB-A 40
Noise Outdoor dB-A 52
Pipeline connection manner Flare
Max. pipeline length m 9.0
Narrow tube mm 6.35 (1/4”) Refrigerant tubing
diameter (in) Wide tube mm 9.52 (3/8”)
Dimensions & Weight Indoor unit Outdoor unit
Height mm 675
Width mm 430
Unit dimensions Depth mm 265
Height mm 820
Width mm 535
Package dimensions Depth mm 385
Weight Cross weight kg 16 25
Data subject to change without notice

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2.2 Specifications of main parts
2.2.1 Indoor unit AA-2118
Controller
Part No. JUK6.672.849
Controller Microprocessor
Fuse 250V T3.15A
Remote controller KK10B-C1
Fan motor
Type Cross-flow fan
Quantity / Diameter / Length mm 1 /Ф86 /640
Fanmotormodel Welling:RPG20E-2
Pole / Rotation of motor
(rpm, 220V High speed) 4 / 1250
Ratedpoweroutput W 16
Coilresistance
(Ambient temp 20℃) Ω
red-purple: 290±15%,
purple -white :403±15%
μF 1.0
Fan &
Operating capacitor VAC 450
Louver motor
Type Step motor
Model ZTC1.01
Rated voltage V 12VDC±10%
Coil resistance
(Ambient temperature 25℃) Ω80Ω±10%
Heat exchanger
Fin Aluminum fin / Copper tube
Row 1
Rowpitch mm 1.4
Facearea m
2 0.144
Data subject to change without notice

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2.2.2 Outdoor unit AA-2118
Controller PCB
Part No. -
Fuse -
Compressor
Controller model Highly: SD134SN-H3AU
Compressor power input W 895
Compressor oil / Amount CC Highly: DIAMOND MS-56 / 270
Overload protector Highly: BF840-KB
Compressor locked rotor amperes A 21
Coil resistance (Ambient temp 20℃) ΩHighly: C-R: 3.53, C-S: 4.02
Operatingcapacitor μF/ VAC Highly: 25/ 450
Fan & Fan motor
Type Propeller fan
Amount / Diameter mm 1 /Ф400
Fan motor model / amount Welling: YDK19-6V-2/
Pole / Rotation of motor (220V, High speed) rpm 6 ..860
Ratedpoweroutput W 19
Coil resistance (Ambient temp 20℃) Ωwhite-gray :254±15%,/
brown-white:150±15%/
Safety devices Open : 130±8℃Close:82±15℃
μF2.0
Operating capacitor VAC 450
Heat exchanger
Fin Aluminum fin / Copper tube
Rows 1
Finpitch mm 1.4
Facearea m
20.177
Data subject to change without notice

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2.3 Specifications of other parts
Indoor unit
Transformer DB-13-01
Indoor temperature KTEC-41-C12
Thermal resistor Coiled pipe KTM-41-C9
Resistance temperature 25℃ K
Ω
10
Power supply length (m)
/ cross section (mm2)2.5
AWG16
Rated value 15A, 250VAC
Power relay JQX-102F-012-P
Coil rated voltage,
Current coil resistance(20℃) 12V±10%, 20A
160Ω
Outdoor unit
Data subject to change without notice

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3. Control Specifications
3.1 Control functions
3.1.1 Switches input:
Press on / off button in the off mode. The air conditioner is turned on and works at 24℃in sweep
mode automatically. Press the button when the unit is running or in test run mode, air conditioner is turned
off.
Press the button over four seconds until the buzzer beeps twice. Air conditioner enters the test run
mode. Users can use the remote controller to turn off the units or change the running mode. The air
conditioner will start the normal operation automatically if the test running time is for more than 15minutes.
Air conditioner will stop and exit the test run mode when users press on / off button which is on the indoor
unit or on the remote controller.
3.1.2 Temperature control:
Remote controller will transmit indoor temperature and other information to indoor unit every 3
minutes. If the master controller MCU can ’t receive remote signal for 10minutes, air conditioner will control
the running automatically by indoor temperature sensor.
When indoor temperature sensor is being used, It has 3℃temperature compensation in heating
mode. There is no temperature compensation in cooling and dehumidification mode.
3.1.3 Sleep mode:
For better comfort in sleeping and energy saving. Temperature will be adjusted automatically when
the sleep mode is set. The set temperature will increase 1℃after running 1 / 2 hour in cooling and
dehumidification mode, and 1℃after another 1 / 2 hour. Temperature will decrease 2℃after running 1 / 2
hour in heating mode, and 2℃after another 1 / 2 hour. The set temperature will be controlled between 16
℃and 30℃.
3.2 Operating mode
3.2.1 Auto-operating mode:
When air conditioner stars running or the set temperature is adjusted under this mode. Master
controller MCU can select running mode automatically by indoor temperature and set temperature. It runs in
cooling mode when Tr≥Ts (Tr: Room temperature, Ts: Set temperature) and in heating mode when Tr<Ts.
In heating mode, When Tr≥Ts+3℃lasts for 15minutes. It turns into cooling mode.
In cooling mode, when Tr≤Ts-2℃lasts for 15 minutes. It turns into heating mode.
When Ts-2℃< Tr < Ts+3℃,it turns into original mode.
Temperature control range: 16℃-30℃; Original value:24℃;
Temperature control precision:±1℃;
3.2.2 Cooling:
Temperature control range: 16℃-30℃; Original value:24℃;
Temperature control precision:±1℃;
Characters on control:
4-way reversing valve closes:

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When Tr≥Ts+1℃, compressor runs.
When Tr≤Ts℃, compressor stops.
The control circuit will stop compressor only after it has run at least 5minutes.The compressor can
be restarted 3minutes later the turn-off.
Fan speed control:
Auto: When Tr>Ts+2℃, high speed;
When Ts+1℃≤Tr<Ts+2℃,medium speed;
When Tr< Ts+1℃, low speed.
Manual: Users can select the fan speed of high, medium or low level as needed in the turn-on
status.
Louver adjustment:
Manual: Set the louver position as needed.
(Position 1-6 in the figure.)
Auto: In the first 20 minutes of cooling operation. The louver is at position 4. After 20minutes, it
runs automatically to position 6.
3.2.3 Dehumidification:
Temperature control range: 16℃-30℃; Original value:24℃;
Temperature control precision:±1℃;
Characters on control:
4-way reversing valve closes.
When Tr≥Ts+2℃,the running mode is the same to the cooling operation.
When Ts-1℃< Tr < Ts+2℃, compressor and external fan motor run continuously. And internal fan
motor runs between low wind for 10 seconds and breeze for 20 seconds continuously.
When 15℃< Tr < Ts-1℃, compressor and external fan motor work for 3 minutes, then stop for
9minutes. When compressor is running, internal fan motor runs between low speed for 10 seconds and
breeze for 20 seconds. Internal fan motor runs at breeze while compressor is off. Internal fan motor stops
working 30 seconds later the turn-off of compressor.
When Tr≤15℃, indoor and outdoor unit both stop working . Louver blades can be controlled.
Louver adjustment:
Manual: Users can set the position as needed. (Positions 1-6 in the figure)
Auto: The sweep range is fixedaat position 6.
3.2.4 Heating
Temperature control range: 16℃-30℃; Original value:24℃;
1
2
6
5
4
3
Close

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Temperature control precision:±1℃;
Characters on control:
4-way reversing valve opens.
When Tr≤Ts-1℃, compressor , 4-way reversing valve and external fan motor all open .
When Tr≥Ts+1℃, compressor and external fan motor both close. Indoor fan motor blows breeze.
When Trc (Trc: The indoor coiled temperature) drops blow F℃, Air conditioner enters into cool- air-
flow prevention operation; Pause indicator lights.
Fan speed control:
Manual: Users can select the fan speed of high, medium or low level as needed in the turn-on
status.
Auto: When Tr< Ts-2℃, high.
When Tr≥Ts-2℃,medium.
Louver adjustment:
Manual: Users can set the position as needed.
(Positions 1-6 in the figure)
Auto: When Trc<39℃,the sweep range is at position 5.
When Tr≥42℃, the sweep range is at position 4.
When 39℃≤Tr<42℃,the sweep range keeps at original position.
Compressor control:
The control circuit will stop compressor only after it has run at least 5 minutes. Compressor can be
restarted 5 minutes later the turn-off.
3.3 Protect functions
3.3.1 Delay-starting protection for the compressor.
Compress will restart working 3 minutes (5 minutes in heating) later the turn-off of compressor or
power-off to keep the pressure balance of the cooling system.
3.3.2 Cooling air flow protection:
In heating operation, when Trc<F℃,and compressor stops or the running time of compressor is
not more than 5 minutes. Air conditioner will enter into the cool-air-flow protection. Louver runs into the
position 6 and can ’t be controlled. Internal fan motor stops and pause indicator lights.
3.3.3 Freeze-prevention: To prevent indoor heat exchanger freezing in cooling and
dehumidification operation.
Compressor will stop running when it runs at least 10 minutes and Trc≤-2℃. If compressor is off
for more than 6 minutes, or the coiled pipe temperature rises above 8℃and compressor is off at least 3
minutes. Compressor will restart working.
3.3.4 Heating overload working:
When Trc≥A℃, the unit enters into overload protection. And indoor fan speed should be adjusted
to a higher level automatically.
When Trc≥B℃, outdoor fan stops. And it will restart working when coiled pipe temperature drops