9-1. Outline of Air Conditioner Control
This air conditioner is a capacity-variable type air conditioner, which uses AC or DC motor for the indoor for motor and the outdoor fan motor. And the capacity- proportional control compressor which can change the motor speed in the range from 11 to 96 rps is
mounted. The DC motor drive circuit is mounted to the indoor unit. The compressor and the inverter to control fan motor are mounted to the outdoor unit.
The entire air conditioner is mainly controlled by the indoor unit controller.
The indoor unit controller drives the indoor fan motor based upon command sent from the remote controller, and transfers the operation command to the outdoor unit controller.
The outdoor unit controller receives operation com- mand from the indoor unit side, and controls the outdoor fan and the pulse Modulating valve. (P.M.V) Besides, detecting revolution position of the compres- sor motor, the outdoor unit controller controls speed of the compressor motor by controlling output voltage of the inverter and switching timing of the supply power (current transfer timing) so that motors drive according to the operation command.
And then, the outdoor unit controller transfers reversely the operating status information of the outdoor unit to control the indoor unit controller.
As the compressor adopts four-pole brushless DC motor, the frequency of the supply power from inverter to compressor is two-times cycles of the actual number of revolution.
1. Role of indoor unit controller
The indoor unit controller judges the operation commands from the remote controller and assumes the following functions.
• Judgment of suction air temperature of the indoor heat exchanger by using the indoor temp. sensor.
(TA sensor)
• Judgment of the indoor heat exchanger tempera- ture by using heat exchanger sensor (TC sensor) (Prevent-freezing control, etc.)
• Louver motor control
• Indoor fan motor operation control
• LED (Light Emitting Diode) display control
• Transferring of operation command signal (Serial signal) to the outdoor unit
• Reception of information of operation status (Serial signal including outside temp. data) to the outdoor unit and judgment/display of error
• Air purifier operation control 2. Role of outdoor unit controller
Receiving the operation command signal (Serial signal) from the indoor unit controller, the outdoor unit performs its role.
• Compressor operation control
• Operation control of outdoor fan motor
• P.M.V. control
• 4-way valve control
Operations followed to judgment of serial signal from indoor side.
• Detection of inverter input current and current release operation
• Over-current detection and prevention operation to IGBT module (Compressor stop function)
• Compressor and outdoor fan stop function when serial signal is off (when the serial signal does not reach the board assembly of outdoor control by trouble of the signal system)
• Transferring of operation information (Serial signal) from outdoor unit controller to indoor unit controller
• Detection of outdoor temperature and operation revolution control
• Defrost control in heating operation (Temp.
measurement by outdoor heat exchanger and control for 4-way valve and outdoor fan) 3. Contents of operation command signal
(Serial signal) from indoor unit controller to outdoor unit controller
The following three types of signals are sent from the indoor unit controller.
• Operation mode set on the remote controller
• Compressor revolution command signal defined by indoor temperature and set temperature (Correction along with variation of room tempera- ture and correction of indoor heat exchanger temperature are added.)
• Temperature of indoor heat exchanger
• For these signals ([Operation mode] and [Com- pressor revolution] indoor heat exchanger tem- perature), the outdoor unit controller monitors the input current to the inverter, and performs the followed operation within the range that current does not exceed the allowable value.
4. Contents of operation command signal (Serial signal) from outdoor unit controller to indoor unit controller
The following signals are sent from the outdoor unit controller.
• The current operation mode
• The current compressor revolution
• Outdoor temperature
• Existence of protective circuit operation For transferring of these signals, the indoor unit controller monitors the contents of signals, and judges existence of trouble occurrence.
Contents of judgment are described below.
• Whether distinction of the current operation status meets to the operation command signal
• Whether protective circuit operates
When no signal is received from the outdoor unit controller, it is assumed as a trouble.
– 31 − 9-2. Operation Description
1. Basic operation ... 32 1. Operation control ... 32 2. Cooling/Heating operation ... 33 3. AUTO operation ...33 4. DRY operation ... 33 2. Indoor fan motor control ... 34 3. Outdoor fan motor control... 36 4. Capacity control ... 37 5. Current release control ... 37 6. Release protective control by temperature of indoor heat exchanger... 38 7. Defrost control (Only in heating operation) ... 39 8. Louver control ... 40 1) Louver position ... 40 2) Air direction adjustment ... 40 3) Swing ... 40 9. ECO operation ... 41 10. Temporary operation... 42 11. Air purifying control [Detection of abnormality] ... 42 12. Discharge temperature control ... 43 13. Pulse Modulating valve (P.M.V.) control ... 44 14. Self-Cleaning function ... 45 15. Selt-Cleaning function release ... 46 16. Remote-A or B selection ... 47
9-3. Auto Restart Function ...50 9-3-1. How to Set the A uto Restart Function ... 50 9-3-2. How to Cancel the Au to Restar t Function ... 51 9-3-3. Power Failure During Timer Operation ... 51 22. FILTER Indicator ...49
9-4. Remote Controller and Its Fuctions ... 52 9-4-1. Parts Name of Remote Contr oller ... 52 9-4-2. Operation of remote control ... 52 17. QUIET mode ... 48 18. COMFORT SLEEP mode ... 48 19. Short Timer ... 48 20. One-Touch Comfort ... 49 21. Hi-POWER Mode ... 49
9-4-3. Name and Functions of Indications on Remote Contr oller ... 55
Item 1. Basic
operation
Operation flow and applicable data, etc.
1. Operation control
Description
Receiving the user’s operation condition setup, the operation statuses of indoor/outdoor units are controlled.
1) The operation conditions are selected by the remote controller as shown in the below.
2) A signal is sent by ON button of the remote controller.
3) The signal is received by a sensor of the indoor unit and processed by the indoor controllers as shown in the below.
4) The indoor controller controls the indoor fan motor and louver motor.
5) The indoor controller sends the operation command to the outdoor controller, and sends/receives the control status with a serial signal.
6) The outdoor controller controls the operation as shown in the left, and also controls the compres- sor, outdoor fan motor, 4-way valve and pulse Modulating valve.
Remote controller
Indoor unit
Control contents of remote controller
• ON/OFF (Air conditioner/Air purifier)
• Operation select (COOL/HEAT/AUTO/DRY)
• Temperature setup
• Air direction
• Swing
• Air volume select (AUTO/LOW/LOW+/MED/MED+/HIGH)
• ECO
• ON timer setup
• OFF timer setup
• Hi-POWER
Indoor unit control
• Command signal generating function of indoor unit operation
• Calculation function (temperature calculation)
• Activation compensation function of indoor fan
• Cold draft preventive function
• Timer function
• Indoor heat exchanger release control
• Indoor fan motor
• Louver motor
Outdoor unit Outdoor unit control
• Frequency control of inverter output
• Waveform composite function
• Calculation function (Temperature calculation)
• AD conversion function
• Quick heating function
• Delay function of compressor reactivation
• Current release function
• GTr over-current preventive function
• Defrost operation function
• Compressor
• Outdoor fan motor
• 4-way valve
• Pulse Modulating valve (P.M.V.)
Signal receiving Indoor unit control Operation command Serial signal send/receive
Selection of operation conditions
ON/OFF
Serial signal send/receive Outdoor unit control
Inverter
~
• COMFORT SLEEP
• QUIET
• PRESET
• ONE-TOUCH
Revised-1
− 33 −
Operation ON Setup of remote controller
Indoor fan motor control / Louver control / Operation Hz Control (Requierment)
Indoor unit control
Sending of operation command signal
Outdoor unit control
[ ]
Compressor revolution control / Outdoor fan motor control / 4-way valve control In cooling operation: ON
In heating operation: OFF Pulse Modulating valve control
Item 1. Basic
operation
Operation flow and applicable data, etc.
2. Cooling/Heating operation
Description
The operations are performed in the following parts by controls according to cooling/heating conditions.
1) Receiving the operation ON signal of the remote controller, the cooling or heating operation signal starts being transferred form the indoor controller to the outdoor unit.
2) At the indoor unit side, the indoor fan is operated according to the contents of “2. Indoor fan motor control” and the louver according to the contents of “9. Louver control”, respectively.
3) The outdoor unit controls the outdoor fan motor, compressor, pulse Modulating valve and 4-way valve according to the operation signal sent from the indoor unit.
3. AUTO operation
Selection of operation mode
As shown in the following figure, the operation starts by selecting automatically the status of room temperature (Ta) when starting AUTO operation.
*1. When reselecting the operation mode, the fan speed is controlled by the previous operation mode.
4. DRY operation
DRY operation is performed according to the difference between room temperature and the setup temperature as shown below.
In DRY operation, fan speed is controlled in order to prevent lowering of the room temperature and to avoid air flow from blowing directly to persons.
1) Detects the room temperature (Ta) when the DRY operation started.
2) Starts operation under conditions in the left figure according to the temperature difference between the room tempera- ture and the setup temperature (Tsc).
Setup temperature (Tsc)
= Set temperature on remote controller (Ts) + (0.0 to 1.0)
3) When the room temperature is lower 1°C or less than the setup temperature, turn off the compressor.
1) Detects the room temperature (Ta) when the operation started.
2) Selects an operation mode from Ta in the left figure.
3) Fan operation continues until an operation mode is selected.
4) When AUTO operation has started within 2 hours after heating operation stopped and if the room temperature is 20°C or more, the fan operation is performed with ”Super Ultra LOW” mode for 3 minutes.
Then, select an operation mode.
5) If the status of compressor-OFF continues for 15 minutes the room temperature after selecting an operation mode (COOL/HEAT), reselect an operation mode.
Ts + 1 Ts – 1 Ta
Cooling operation
Monitoring (Fan) Heating operation
Tsc +0.5 +1.0 [˚C]
Ta
Fan speed L– (W5) (W5+W3) / 2
SUL (W3)
Operation Hz control (Include limit control)
Revised-1
Item 2. Indoor fan
motor control
Operation flow and applicable data, etc.
<In cooling operation>
(This operation controls the fan speed at indoor unit side.) The indoor fan (cross flow fan) is operated by the phase- control induction motor. The fan rotates in 5 stages in MANUAL mode, and in 5 stages in AUTO mode, respec- tively. (Table 1)
Description
* Symbols UH : Ultra High
H : High
M+ : Medium+
M : Medium
L+ : Low+
L : Low
L- : Low–
UL : Ultra Low SUL : Super Ultra Low
* The fan speed broadly varies due to position of the louver, etc.
The described value indicates one under condition of inclining downward blowing.
1) When setting the fan speed to L, L+, M, M+ or H on the remote controller, the operation is performed with the constant speed shown in Fig. 1.
2) When setting the fan speed to AUTO on the remote controller, revolution of the fan motor is controlled to the fan speed level shown in Fig. 2 and Table 1 according to the setup tempera- ture, room temperature, and heat exchanger temperature.
(Fig. 1)
(Fig. 2)
(Table 1) Indoor fan air flow rate +2.5
Ta [˚C]
+2.0 +1.5 +1.0 +0.5 Tsc
a b c d e
M+(WB)
*3
*4
*5 L(W6) Air volume AUTO
L L+
M M+
H
W6 (L + M) / 2
W9 (M + H) / 2
WC Indication Fan speed Fan speed setup
COOL ON
AUTO
MANUAL
*3 : Fan speed = (M + –L) x 3/4 + L
*4 : Fan speed = (M + –L) x 2/4 + L
*5 : Fan speed = (M + –L) x 1/4 + L (Linear approximation
from M+ and L)
Fan speed
level COOL HEAT DRY
Fan speed Air flow rate Fan speed Air flow rate Fan speed Air flow rate Fan speed Air flow rate Fan speed Air flow rate
(rpm) (m3/h) (rpm) (m3/h) (rpm) (m3/h) (rpm) (m3/h) (rpm) (m3/h)
WF UH 1210 571 1240 630 1280 614 1470 743 1510 735
WE H 1210 571 1240 630 1280 614 1470 743 1510 735
WD UH M+ 1170 546 1190 596 1230 583 1440 723 1480 717
WC H 1120 515 1140 563 1160 540 1390 691 1430 686
WB M+ 1040 465 1040 496 1070 484 1250 601 1280 594 WA 1000 440 100 469 1030 459 1190 563 1220 557 W9 M L+ 960 415 960 443 990 434 1120 518 1150 514
W8 L 870 359 870 383 870 359 970 421 1000 421
W7 L+ L- L+ 850 347 850 369 860 353 950 408 980 409
W6 L L 760 291 760 309 770 297 890 370 920 372
W5 L- UL L- 760 291 760 309 770 297 870 357 900 360
W4 UL UL 700 253 700 269 720 266 810 318 840 323
W3 SUL SUL 650 222 650 236 670 234 750 280 770 280
W2 SUL 500 129 500 135 520 141 600 183 620 187
W1 500 129 500 135 500 129 500 119 520 126
RAS-13SKV-E RAS-13SKVR-E RAS-16SKV-E RAS-16SKVR-E RAS-10SKVR-E
UH H
M M M+
– 35 –
Item 2. Indoor fan
motor control
Operation flow and applicable data, etc.
<In heating operation>
Description
1) When setting the fan speed to L, L+, M, M+ or H on the remote controller, the operation is per- formed with the constant speed shown in Fig. 3 and Table 1.
2) When setting the fan speed to AUTO on the remote controller, revolution of the fan motor is controlled to the fan speed level shown in Fig. 5 according to the set temperature and room temperature.
3) Min air flow rate is controlled by temperature of the indoor heat exchanger (Tc) as shown in Fig. 4.
4) Cold draft prevention, the fan speed is controlled by temperature of the indoor heat exchanger (Tc) as shown in Fig. 6.
[In starting and in stability]
(Fig. 3)
(Fig. 4)
(Fig. 5)
Cold draft preventive control
(Fig. 6)
Fan speed AUTO
Basic fan control
* No limitation while fan speed MANUAL mode is in stability.
* A: When Tsc≥ 24, A is 24, and when Tsc < 24, A is Tsc Tsc: Set value
TSC TA[˚C]
b –0.5 c –1.0 d –1.5 e –2.0 f –2.5 g –5.0 –5.5
L+ (W9)
M+ (WD)
*1
*2
*3
H (WE)
H (WE)
Line-approximate H and SUL with Tc.
SUL (W2) Stop
46 46
Tc 34
45 45 33
33 33 21
32 32 20
*A+4 *A+4 *A+4
*A-4 *A-4 *A-4
Fan speed MANUAL in starting Fan speed AUTO in stability Fan speed AUTO in starting
L L+
M M+
H
W8 (L + M) / 2
WA (M + H) / 2
WE Indication Fan speed Fan speed setup
HEAT ON
AUTO
YES
NO
MANUAL
TC ≥ 42˚C Min air flow rate control
Tc 52 51 42 41
Limited to Min WD tap
* Fan speed =
(TC – – W8) + W8
No limit
*
*1: Fan speed = (M + -L+) x 1 4 + L+
*2: Fan speed = (M + -L+) x 2 4 + L+
*3: Fan speed = (M + -L+) x 3 4 + L+
(Calculated with linear approximation from M+ and L+)
FAN AUTO FAN Manual
In starting
• Until 12 minutes passed after operation start
• When 12 to 25 minutes passed after operation start and room temp. is 3°C or lower than set temp.
• Room temp. < Set temp. –4°C
In stability
• When 12 to 25 minutes passed after operation start and room temp. is higher than (set temp. –3°C)
• When 25 minutes or more passed after operation start
• Room temp. ≥ Set temp. –3.5°C
5) In order to prevent Cold draft when compressor step during heating operation. Then louver will move to upper position and fan speed will reduce or off.
Revised-1
Item 3. Outdoor fan
motor control
Operation flow and applicable data, etc.
The blowing air volume at the outdoor unit side is controlled.
Receiving the operation command from the controller of indoor unit, the controller of outdoor unit controls fan speed.
* For the fan motor, a DC motor with non-stage variable speed system is used. However, it is limited to 8 stages for reasons of controlling.
Description 1) The operation command sent
from the remote controller is processed by the indoor unit controller and transferred to the controller of the outdoor unit.
2) When strong wind blows at outdoor side, the operation of air conditioner continues with the fan motor stopped.
3) Whether the fan is locked or not is detected, and the operation of air conditioner stops and an alarm is displayed if the fan is locked.
4) According to each operation mode, by the conditions of outdoor temperature (To) and compressor revolution, the speed of the outdoor fan shown in the table is selected.
2) Fan speed ≥ 400 when the motor stopped.
Air conditioner ON (Remote controller)
YES
YES NO
NO Indoor unit controller
Fan motor ON
3) Fan lock
OFF status of fan motor continues.
4) Motor operates as shown in the table below.
1) Outdoor unit
operation command (Outdoor fan control)
Air conditioner OFF
Alarm display
Outdoor fan speed (rpm) Tap
f 1 f 2 f 3 f 4 f 5 f 6 f 7 f 8
10SAVR-E 13SAV-E,13SAVR-E, 16SAVR-E
200 200 200
300 300 300
370 370 370
440 440 440
440 440 440
500 500 500
550 550 550
600 600 600
Tap f 9 f A f B f C f D f E f F
600 650 650
600 700 700
650 700 700
700 800 800
700 800 800
700 800 800
700 800 900
Compressor speed (rps) To > 38°C To > 28°C To To > 15°C To > 5.5°C To > 0°C During To > 38°C ECO mode To < 38°C When To is abnormal
~ 13.8 ~ 31.7 32.3 ~ MAX MIN MAX MIN MAX MIN MAX f 2 f 3 f A f C f D f F f 2 f 3 f 7 f A f 9 f C f 1 f 3 f 2 f 5 f 4 f 7 f 1 f 1 f 1 f 2 f 2 f 4 f 2 f 3 f B f C f C f D In cooling operation
Compressor speed (rps) To > 15°C To To < 15°C To < 5.5°C To < − 5.0°C To > 15°C During To < 15°C ECO mode To < 5.5°C
To < − 5.5°C When To is abnormal
~16.8 ~47.9 48.5 ~ MAX f 3 f 8 f 9
f 3 f 9 f A
f 8 f A f D
f B f C f D
f 3 f 3 f 6 f 3 f 3 f 8 f 5 f 9 f 9
f 7 f A f B
f A f B f D
In Heating operation
f 2 f 3 f C f D f E f F
To < 0°C f 0 f 0 f 0 f 1 f 1 f 2
f D f F f D f F f F f 2 f 3 f 2 f 3 f B f C
f D
16SAV-E 10SAVR-E 13SAV-E,13SAVR-E,16SAV-E 16SAVR-E
f 0 0 0 0
– 37 –
Item 4. Capacity
control
Operation flow and applicable data, etc.
The cooling or heating capacity depending on the load is adjusted.
According to difference between the setup value of tempera- ture and the room temperature, the capacity is adjusted by the compressor revolution.
Description 1) The difference between set
temperature on remote controller (Ts) and room temperature (Ta) is calculated.
2) According to the temperature difference, the correction value of Hz signal which determines the compressor speed is set up.
3) The rotating position and speed of the motor are detected by the electromotive force occurred on the motor winding with operation of the compressor.
4) According to the difference resulted from comparison of the correction value of Hz signal with the present operation Hz, the inverter output and the commuta- tion timing are varied.
5) Change the compressor motor speed by outputting power to the compressor.
* The contents of control operation are same in cooling operation and heating operation
This function prevents troubles on the electronic parts of the compressor driving inverter.
This function also controls drive circuit of the compressor speed so that electric power of the compressor drive circuit does not exceed the specified value.
5. Current release control
Set temp. (Ts) Room temp. (Ta)
Correction of Hz signal
Outdoor temp. To Setup of current release point
Capacity control continues.
Detection of electromotive force
of compressor motor winding
Detection of motor speed and rotor position
Inverter output change Commutation timing change Change of compressor speed
Remote controller Indoor unit
Ts –Ta
Current decrease Correction value of Hz signal ≤ Operating Hz
Outdoor unit inverter main circuit control current
High Low
Reduce compressor speed Operating current ≤
Setup value
1) The input current of the outdoor unit is detected in the inverter section of the outdoor unit.
2) According to the detected outdoor temperature, the specified value of the current is selected.
3) Whether the current value exceeds the specified value or not is judged.
4) If the current value exceeds the specified value, this function reduces the compressor speed and controls speed up to the closest one commanded from the indoor unit within the range which does not exceed the specified value.
Outdoor temp.
10SAVR-E 13SAV-E 13SAVR-E 16SAV-E 10SAVR-E 13SAV-E 13SAVR-E 16SAV-E
16SAVR-E 16SAVR-E
45°C 3.97A 4.27A 4.27A 6.45A 6.30A 6.30A 7.72A 7.72A
40°C 44°C 4.35A 4.88A 4.88A 6.75A
16°C 39°C 6.30A 6.30A 8.47A 8.47A
11°C 15.5°C
10.5°C 6.30A 6.30A 9.22A 9.22A
6.30A 6.30A 10.80A 10.80A
Cooling current release value Heating current release value
Item
6. Release protective control by tempera- ture of indoor heat exchanger
Operation flow and applicable data, etc.
<In cooling/dry operation>
(Prevent-freezing control for indoor heat exchanger) In cooling/dry operation, the sensor of indoor heat exchanger detects evaporation temperature and controls the compressor speed so that temperature of the heat exchanger does not exceed the specified value.
Description
1) When temperature of the indoor heat exchanger drops below 5°C, the compressor speed is
reduced. (P zone)
2) When temperature of the indoor heat exchanger rises in the range from 6°C to under 7°C, the compressor speed is kept.
(Q zone)
3) When temperature of the indoor heat exchanger rises to 7°C or higher, the capacity control operation returns to the usual control in cooling operation.
(R zone)
1) When temperature of the indoor heat exchanger rises in the range from 50°C to 55°C, the compressor speed is kept.
(Q zone)
When temperature of the indoor heat exchanger drops in the range from 46°C to under 55°C, the compressor speed is kept.
(Q zone)
2) When temperature of the indoor heat exchanger rises to 55°C or higher, the compressor speed is reduced. (P zone)
3) When temperature of the indoor heat exchanger does not rise to 50°C, or when it drops below to 46°C, the capacity control operation returns to the usual control in heating operation.
(R zone)
<In heating operation>
(Prevent-overpressure control for refrigerating cycle) In heating operation, the sensor of indoor heat ex- changer detects condensation temperature and controls the compressor speed so that temperature of the heat exchanger does not exceed the specified value.
7˚C 6˚C 5˚C
R
Q P
55˚C 52˚C
48˚C
P
Q
R Usual cooling capacity control
Reduction of compressor speed
Indoor heat exchanger temperature
When the value is in Q zone, the compressor speed is kept.
Reduction of compressor speed
Usual heating capacity control
Indoor heat exchanger temperature
When the value is in Q zone, the compressor speed is kept.