Compressor frequency decides by capacity of an indoor unit, operation number of an indoor unit,
set temperature, room temperature and outside temperature.
2. AUTO CHANGEOVER OPERATION
2-1 For AS, AU type
When the air conditioner is set to the AUTO mode by remote control, operation starts in the optimum
mode from among the HEATING, COOLING, DRY and MONITORING modes. During operation, the
optimum mode is automatically switched in accordance with temperature changes. The temperature
can be set between 64°F(18°C) and 88°F(30°C) in 2°F(1°C) steps.
.When operation starts, only the indoor and outdoor fans are operated for 1 minute. After 1 minute,
1
the room temperature and outside air temperature are sensed and the operation mode is
selected in accordance with the table below.
( Fig.1 : Outside air temperature zone selection )
C zone
90°F(32°C)
B zone
32°F(0°C)
A zone
( Table.1 Operation mode selection table)
Outside air temperature (TO)
Room temperature (TB)
TB > TS+4°F(2°C)
TS+4°F(2°C) TB TS - 4°F(2°C)
<
TB TS- 4°F(2°C) HeatingHeating Monitoring
2
.When COOING was selected at , the air conditioner operates as follow:
The same operation as COOLING OPERATION of item 1 above is performed.
When the room temperature has remained at (set temperature -2°F(1°C)) for 8 minutes, operation is
automatically switched to DRY and the same operation as DRY OPERATION of item 3 above
is performed.
If the room temperature reaches (set temperature +4°F(2°C) during DRY operation, operation returns to
COOLING operation.
1
A zone B zone C zone
Monitoring
MonitoringMonitoringMonitoring
Cooling
(automatic dry)
Cooling
(automatic dry)
3
.When HEATING was selected at , the same operation as HEATING OPERATION of item 2
above is performed.
4
When the compressor was stopped for 6 consecutive minutes by the temperature control function
after the COOLING or HEATING operation mode was selected at above, operation is switched
to MONITORING and the operation mode is selected again.
1
1
01-01
2-2 For AR type
When the air conditioner is set to the AUTO mode by remote control, operation starts in the optimum
mode from among the HEATING, COOLING and MONITORING modes. During operation, the
optimum mode is automatically swiched in accordance with temperature changes. The temperature
can be set between 18°C and 30°C in 1 degC steps.
When operation starts, only the indoor fan is operated for 1 minute. (Air flow mode: S- Lo)
1
After 1 minute, depends on the room temperature and outdoor unit's operarion mode,
the operation mode is selected in accordance with the table below.
( Table 1 : Operation mode selection table )
Room temperature :TR
TR > Ts +2 degC
=
Ts +2 degC > TR > Ts-2 degC
Ts +2 degC > TR
Ts : Setting temperature
TR: Room temperature
2
When COOLING was selected at , the same operation as COOLING OPERATION is performed.
3
When HEATING was selected at , the same operation as HEATING OPERATION is performed.
4
When the compressor was stopped for 6 consecutive minutes by the temperature control function
after the COOLING or HEATING operation mode was selected at above, operation is switched
to MONITORING and the operation mode is selected again.
=
Operation mode
Cooling
Monitoring
Heating
1
1
1
01-02
3. INDOOR FAN CONTROL
(1).Fan speed
( Table 2 : Indoor Fan Speed )
ASU9RMLQ
Operation mode Air flow mode Speed (rpm)
Heating
Cooling
Dry 8 00
ASU18RMLQ
Operation mode Air flow mode Speed (rpm)
Heating
Cooling
Dry 1,060
Hi 1,200
Me+ 1,200
Me 1,070
Lo 970
Quiet 850
Cool air
prevention
S-Lo 480
Hi 1,200
Me 1,070
Lo 900
Quiet 800
Hi 1,480
Me+ 1,480
Me 1,380
Lo 1,200
Quiet 1,060
Cool air
prevention
S-Lo 480
Hi 1,480
Me 1,380
Lo 1,200
Quiet 1,060
800
850
Operation mode Air flow mode Speed (rpm)
Heating
Cooling
Dry 9 00
ASU12RMLQ
prevention
Hi 1,380
Me+ 1,380
Me 1,230
Lo 1,110
Quiet 960
Cool air
S-Lo 480
Hi 1,380
Me 1,230
Lo 1,050
Quiet 900
850
ARU9RML
Operation mode Air flow mode Speed (rpm)
Heating
Cooling
Quiet
Cool air
prevention
Dry
ARU18RML
Operation mode Air flow mode Speed (rpm)
Heating
Cooling
Quiet
Cool air
prevention
Dry
Hi
Me
Lo
S-Lo
Hi
Me
Lo
S-Lo
1,070
880
800
800
450
450
800
1,010
850
800
800
350
350
800
ARU12RML
Operation mode Air flow mode Speed (rpm)
Heating
Cooling
Quiet
Cool air
prevention
Dry
Hi
Me
Lo
S-Lo
01-03
850
790
700
700
310
310
700
AUU9RML
AUU12RML
Operation modeAir flow mode
Cooling
Fan
Heating
Dry
Monitoring
Hi590
Me
Lo
Quiet
Hi
Me+
Me
Lo
Quiet
Auto
S- Lo
AUU18RML
Operation modeAir flow mode
Cooling
Fan
Heating
Dry
Monitoring
Hi790
Me
Lo
Quiet
Hi
Me+
Me
Lo
Quiet
Auto
S- Lo
Speed (rpm)
540
490
440
590
570
540
490
440
460
300
Speed (rpm)
660
570
460
840
800
750
650
500
460
300
Operation modeAir flow mode
Cooling
Fan
Heating
Dry
Monitoring
Hi660
Me
Lo
Quiet
Hi
Me+
Me
Lo
Quiet
Auto
S- Lo
Speed (rpm)
580
520
460
650
620
580
520
460
460
300
(2).FAN OPERATION
The airflow can be switched in 5 steps such as AUTO, QUIET, LOW, MED, HIGH, while the indoor
fan only runs.
When Fan mode is set at (Auto), it operates on (MED) Fan Speed. < for AS, AU type >
it operates intermittent on (LO) Fan speed and (OFF)
by one minute. <for AR type>
(3). COOLING OPERATION
Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature,
as shown in Figure 2.
On the other hand, if switched in [HIGH] [QUIET], the indoor motor will run at a constant airflow of [COOL]
operation modes QUIET, LOW, MED, HIGH,as shown in Table 2.
(Fig.2)
airflow change - over ( Cooling: AUTO )
Hi mode
+4°F(+2°C)
Me mode
+2°F(+1°C)
Lo mode
*1
When the room
temperature rises
+6°F(+3.0°C)
+5°F(+2.5°C))
*(
+3°F(+1.5°C)
(+3°F ) (+1.5°C)
*
*For AS / AU / Type
When the room
temperature lowers
(Room temperature) D (Setting temperature)
*1 : Contains a condition to the following
When the operation mode is set to AUTO mode
at the start of operation.
When the setting temperature was changed.
When the operation mode was changed to COOLING mode.
When the airflow mode was changed to AUTO mode.
01-04
(4). DRY OPERATION
During the dry mode operation, the fan speed setting can not be changed.
The indication of the remote controller is fixed in [AUTO].
The fan operates on [S-Lo] mode or OFF.
(5). HEATING OPERATION
5-1. For AU / AS Type
Switch the airflow [AUTO], and the
indoor fan motor will run according
to a room temperature, as shown in
Figure 3.
On the other hand, if switched
[HIGH]
[QUIET], the indoor motor
will run at a constant airflow of [HEAT]
operation modes QUIET, LOW, MED,
HIGH, as shown in Table 2.
5-2. For AR Type
When the airflow is set to [AUTO], the indoor fan
motor operates [MED] mode.
Then the indoor fan motor will run according
to a room temperature, as shown in Figure 4.
On the other hand, if switched in [HIGH] [QUIET],
the indoor motor will run at a constant airflow
of [HEAT] operation modes QUIET, LOW, MED, HIGH,
as shown in Table 2.
-2°F(-1°C)
-4°F(-2°C)
(Fig.3)
airflow change - over ( Heating: AUTO)
When the room
temperature rises
LOW mode
-3°F(-1.5°C)
MED mode
-5°F(-2.5°C)
MED + mode
(Room temperature) - (Setting temperature)
When the room
temperature lowers
( Fig.4 : Airflow change - over ( Heating : AUTO ) )
Indoor heat exchanger
temperature
Go up one-step
117°F(47°C)
Hold
105.8°F(41°C)
Go down one-step
(6). COOL AIR PREVENTION CONTROL (Heating mode)
6-1. For AS Type
The maximum value of the indoor fan speed is set as shown in Figure 5, based on the detected
temperature by the indoor heat exchanger sensor on heating mode.
(Fig.5 : Cool Air Prevention Control)
Indoor heat exchanger Indoor heat exchanger
temperature temperature
117°F(47°C)
104°F(40°C)
99°F(37°C)
(30°C)
86°F
Hi
Me+
Lo
Cool air prevention
S-Lo
01-05
104°F(40°C)
93°F(34°C)
90°F(32°C)
82°F(28°C)
6-2. For AR Type
The maximum value of the indoor fan speed is set as shown in Figure 6, based on the detected
temperature by the indoor heat exchanger sensor on heating mode.
( Fig.6 : Cool Air Prevention Control )
Indoor heat exchanger
temperature
Indoor heat exchanger
temperature
Setting
91.4°F(33°C)
Fan mode
Lo mode
86°F(30°C)
86°F(30°C)
S-Lo mode
6-3. For AU Type
When the compressor operates, the maximum value of the indoor fan speed is set as shown in Figure 7,
based on the detected temperature by the indoor heat exchanger sensor on heating mode.
When the compressor does not operate, the indoor fan motor operates [S-Lo] mode.
( Fig.7 : Cool Air Prevention Control )
< [Hi] setting >
Indoor heat exchanger
temperature
107.6°F(42°C)
102.2°F(39°C)
99°F(37°C)
86°F(30°C)
Hi
Me+
Lo
Cool air
prevention
S-Lo
Indoor heat exchanger
temperature
99°F(37°C)
93°F(34°C)
90°F(32°C)
75.2°F(24°C)
Indoor heat exchanger
temperature
102.2°F(39°C)
99°F(37°C)
86°F(30°C)
< The other of [Hi] setting >
Setting
FAN mode
Lo (Qu)
Cool air
prevention
S-Lo
Indoor heat exchanger
temperature
01-06
93°F(34°C)
90°F(32°C)
75.2°F(24°C)
4. OUTDOOR FAN CONTROL
(1). Fan Speed
The speed of outdoor unit fan motor is determined at outside temperature and compressor rotation.
Each time the button is pressed, the air direction range will change as follow:
(Fig 5: Air Direction Range)
(Operation Range)
Cooling / Dry mode
Heating mode
Fan mode
Use the air direction adjustments within the ranges shown above.
The vertical airflow direction is set automatically as shown, in accordance with the type of operation
selected.
When the temperature of the air being blown out is low at the start of heating operation or during
defrosting, the airflow direction temporarily becomes
During use of the Cooling and Dry modes, do not set the Air Flow Direction Louver in the Heating
range (
drop of water may drip from the air conditioner. During the Cooling and Dry modes, if the Air Flow
Direction Louvers are left in the hating range for more than 30 minutes, they will automatically
return to position
During Monitor operation in AUTO CHANGEOVER mode, the airflow direction automatically
becomes
Cooling / Dry mode
Heating mode
) for long period of time, since water vapor many condense near the outlet louvers and
.
, and it cannot be adjusted.
Horizontal flow
Downward flow
to prevent cold air being blown onto the body.
(2). SWING OPERATION
When the swing signal is received from the remote controller, the vertical louver starts to
swing.
(Swinging Range)
Cooling mode / Dry mode / Fan mode(
Heating mode / Fan mode(
When the indoor fan is either at S-lo or Stop mode, the swinging operation is interrupted
and the louver stops at the memorized position.
)
)
01-08
5-2 Cassette (AU) type
1. VERTICAL LOUVER CONTROL
(Function Range)
Each time the button is pressed, the air direction range will change as follows:
(Air Direction Range)
(Operation Range)
During Cooling/Dry mode/Fan mode :
During Heating mode :
Use the air direction adjustments within the ranges shown above.
3
4
The vertical airflow direction is set automatically as shown, in accordance with the type of operation
selected.
Cooling / Dry / Fan mode
Horizontal flow
Heating modeDownward flow
During AUTO mode operation, for the first minute after beginning operation, air-flow will be horizontal
; the air direction cannot be adjusted during this period.
1-2. SWING OPERATION
When the swing signal is received from the remote controller, the vertical louver starts to swing.
The range of swing depends on the set airflow direction.
(Swinging Range)
The type of operation
Cooling/Dry/Fan
Heating
Range of swing
to
to
1
2
When the indoor fan is either at S-Lo or Stop mode, the swinging operation is interrupted
and the louver stops at the memorized position.
( Stop mode means Operation stop.)
01- 09
6. COMPRESSOR CONTROL
(1). OPERATION FREQUENCY RANGE
The operation frequency of the compressor is different based on the operation mode as
shown in the table 4.
(Table 4 : Compressor Operation Frequency Range)
CoolingHeating
MinMaxMinMax
AOU24RML15Hz90Hz20Hz95Hz
AOU36RML15Hz90Hz20Hz95Hz
(2). OPERATION FREQUENCY CONTROL AT START UP
The compressor frequency soon after the start-up is controlled as shown in the figure 6.
(Fig.6 : Compressor Control at Start-up)
56rps
40rps
46
134120 (Sec)60~720
1) Compressor operates for 180 seconds by 40 rotations.
2) In the case of lower than 40 rotations, it operates at these rotations.
3) Compressor operates for 60 to 720 seconds.
When discharge temperature exceeds 30 degrees in the meantime, it shifts to 56 rotations.
4) Compressor operates at target rotations after 120 second operation.
01-10
7. TIMER OPERATION CONTROL
7-1 Wireless Remote Controller
For AS type
ON / OFF TIMER
PROGRAM TIMER
SLEEP TIMER
(1). OPERATION FREQUENCY RANGE
OFF timer : When the clock reaches the set time, the air conditioner will be turned off.
Operation mode
Stop mode
Set time of timer
ON timer : When the clock reaches the set time, the air conditioner will be turned on.
Operation mode
Stop mode
Set time of timer
(2). PROGRAM TIMER
The program timer allows the OFF timer and ON timer to be used in combination one time.
Operation mode
Stop mode
Set time
Operation mode
Stop mode
Set timeSet timeSet time
Operation mode
Stop mode
Operation will start from the timer setting (either OFF timer or ON timer) whichever is closest
to the clock's current timer setting. The order of operations is indicated by the arrow in the remote
control unit's display.
SLEEP timer operation cannot be combined with ON timer operation.
01-11
(3). SLEEP TIMER
If the sleep is set, the room temperature is monitored and the operation is stopped automatically.
If the operation mode or the set temperature is change after the sleep timer is set, the operation is
continued according to the changed setting of the sleep timer from that time ON.
In the cooling operation mode
When the sleep timer is set, the setting temperature is increased 2°F(1°C).
It increases the setting temperature another 2°F(1°C) after 1 hour.
After that, the setting temperature is not changed and the operation is stopped at the time
of timer setting.
Set temperature rises
( Ts : Set temperature )
+4°F(+2°C)
+2°F(+1°C)
Ts
Stop of operation
Set
60min
In the heating operation mode
When the sleep timer is set, the setting temperature is decreased 2°F(1°C).
It decreases the setting temperature another 2°F(1°C) every 30 minutes.
Upon lowering 8°F(4°C), the setting temperature is not changed and the operation stops at
the time of timer setting.
Set temperature lowers
( Ts : Set temperature )
Ts
-2°F(-1°C)
-4°F(-2°C)
-6°F(-3°C)
-8°F(-4°C)
Stop of operation
Set
30min
01-12
30min
30min
7-2 Wired Remote Controller
For AR / AU type
ON / OFF TIMER
WEEKLY TIMER
TEMPERATURE SET BACK TIMER
1. ON / OFF TIMER
OFF timer : When the clock reaches the set time, the air conditioner will be turned off.
Operation mode
Set time of timer
ON timer : When the clock reaches the set time, the air conditioner will be turned on.
Stop mode
Stop mode
Operation mode
Set time of timer
2. WEEKLY TIMER
2-1. WEEKLY TIMER
Use this timer function to set operating time for each day of the week.
The weekly timer allows up to two ON and OFF time to set up per day.
Operation mode
Stop mode
Set time
The operating time can be set in 30 min increments only.
The OFF time can be carried over to next day.
The ON timer and the OFF timer functions cannot be set with using the weekly timer.
Both ON and OFF time must be set.
Operation mode
Stop mode
Set timeSet timeSet time
Operation mode
Stop mode
01-13
2-2. DAY OFF setting
The DAY OFF setting is only available for days for which weekly settings already exist.
If the operating time carries over to the next day (during a next day setting), the effective
DAY OFF range will be set as shown below.
Normal
DAY OFF
Operation mode
Operation mode
Stop mode
Stop mode
Preceding dayNext day
Setting day
Stop mode
Next day setting
DAY OFF
Stop mode
Operation mode
Stop mode
Preceding dayNext daySetting day
Operation mode
Stop mode
The DAY OFF setting can only be set one time. The DAY OFF setting is cancelled automatically
after the set day has passed.
3. TEMPERATURE SET BACK TIMER
The SET BACK timer only changes the set temperature for 7 days, it cannot be used to start or stop
air conditioner operation.
The SET BACK timer can be set to operate up to two times per day but only one temperature setting
can be used.
During the COOL/DRY mode, the air conditioner will operate at a minimum of 18°C even if
the SET BACK temperature is set to 17
°C or lower.
Case of SET BACK timer on the Cooling operation.
( Setting temperature :22°C, SET BACK temperature :26°C)
SET BACK setting
Operation
temperature
*1
Operation
temperature
*1: During the SET BACK function,
the setting temperature is changed.
ONOFFOFFON
26°C
22°C
26°C
24°C
22°C
Chenge the setting temperature:
22°C 24°C
01-14
8. ELECTRONIC EXPANSION VALVE CONTROL
The most proper opening of the electronic expansion valve is calculated and controlled under the
present operating condition based on the following values.
The compressor frequency, the temperatures detected by the discharge temperature sensor
and the outdoor temperature sensor.
The pulse range of the electronic expansion valve control is between 30 to 480 pulses.
At the time of supplying the power to the outdoor unit, the initialization of the electronic
expansion valve is operated (1000 pulses are input to the closing direction).
9. TEST OPERATION CONTROL
Under the condition where the air conditioner runs, press the test operation button of the remote
control, and the test operation control mode will appear. During test running, the operation lamp
and timer lamp of the air conditioner body twinkle simultaneously. Set the test operation mode,
and the compressor will continue to run regardless of whether the room temperature sensor detects.
The test operation mode is released if 60 minutes have passed after setting up the test operation.
10. PREVENT TO RESTART FOR 3 MINUTES ( 3 MINUTES ST )
The compressor won't enter operation status for 3 minutes after the compressor is
stopped, even if any operation is given.
11. FOUR-WAY VALVE EXTENSION SELECT
At the time when the air conditioner is switched from the cooling mode to heating mode,
the compressor is stopped, and the 4-way valve is switched in 3 minutes later
after the compressor stopped.
12. AUTO RESTART
When the power was interrupted by a power failure, etc. during operation, the operation contents
at that time are memorized and when power is recovered, operation is automatically started with
the memorized operation contents.
When the power is interrupted and recovered during timer operation, since the timer operation time
is shifted by the time the power was interrupted, an alarm is given by blinking (7 sec ON/2 sec OFF)
the indoor unit body timer lamp.
[Operation contents memorized when the power is interrupted]
Operation mode
Set temperature
Set air flow
Timer mode and timer time
Set air flow Direction
Swing
The detection position of the thermistor (When it used the wired remote controller for AS and AU)
01-15
13. MANUAL AUTO OPERATION (Indoor unit body operation)
If MANUAL AUTO Button is set, the operation is controlled as shown in Table 6.
If the remote control is lost or battery power dissipated, this function will work without the remote
control.
(Table 6)
Manual auto operation
OPERATION MODEAuto changeover
FAN CONT. MODEAuto
TIMER MODEContinuous
SETTING TEMP.75°F(24°C)
SETTING LOUVERStandard
SWINGOFF
(No timer setting available)
14. FORCED COOLING OPERATION
Forced cooling operation is started when pressing MANUAL AUTO button for 10 seconds or more.
During the forced cooling operation, it operates regardless of room temperature sensor.
Operation LED and timer LED blink during the forced cooling operation. They blink for 1 second ON
and 1 second OFF on both operation LED and timer LED (same as test operation).
Forced cooling operation is released after 60 minutes of starting operation.
The FORCED COOLING OPERATION will start as shown in Table 7.
When the outdoor heat exchanger temperature is lower than Operation temperature (Refer to Table 8)
and the heating operation has
the compressor is heated.
(By heating the compressor, warm air is quickly discharged when operation is started.)
When operation was started, and when the outdoor temperature rises to Release temperature or greater,
preheating
been stopped for 3 hours, power is applied to the compressor and
Before 24 hourAfter 24 hour
Operation
temperature
32°F
(0°C)
Release
temperature
39.2°F
(4°C)
37.4°F
(3°C)
Release
temperature
44.6°F
(7°C)
01-16
16. FRESH AIR CONTROL (For AR type)
The fan motor for Fresh Air is operated in synchronization with the indoor fan operation
as shown in Figure 11.
(Fig.11 : Fresh air control)
Fan motor
(Indoor unit)
Fan motor
(for Fresh Air)
Operation
Stop
Operation
Stop
17. EXTERNAL ELECTRICAL HEATER CONTROL (For AR type)
The external electrical heater is operated as shown in Figure 12.
(Fig.12 : External electrical heater control)
When the room
temperature rises
Heater : OFF
Ts -1°C
Ts -3°C
Ts -12°C
Heater : ON
Heater : OFF
Ts -10°C
Ts : Setting temperature
When the compressor stop,
External electrical heater is OFF.
When the room
temperature drops
18. DRAIN PUMP OPERATION ( For AU, *AR type )
During Cooling / Dry operation
1. When the compressor starts, the drain pump starts simultaneously.
2. The drain pump operates continuously for 3 minutes after the compressor is turned off.
3. When the compressor stops by the "Indoor heat exchanger de-icing function", the drain pump is turned off in 1 hour
after the compressor stops.
4.When the water level in the drain pan rises up and then the float switch functions:
The compressor, indoor and outdoor fan motor operation are stopped.
1
2
Drain pump operates continuously for 3 minutes after the float switch is turned off.
(Almost condensing water may be drained)
5. When the float switch turns ON continuously for 3 min., "FAILURE INDICATION" operates.
6. When the float switch turns OFF within 3 min., the unit starts cooling operation.
During Heating / Fan / Stop operation
1.When the water level in the drain pan rises up and then the float switch functions:
Drain pump operates continuously for 3 minutes after the float switch is turned off.
1
(Almost condensing water may be drained)
2. When the float switch turns ON continuously for 3 min., "FAILURE INDICATION" operates.
*When installed the drain pump which procured locally, it operates
01-17
19. COIL DRY AND CLEAN OPERATION CONTROL (For AS type)
The coil-dry and clean operation functions by pressing COIL DRY button on the remote controller.
The coil-dry operation is consisted of 3 cycles of [Fan operation 3 minutes / Heating operation
2 minutes], and Fan operates for 3 minutes at last before ending the air conditioner operation.
(It takes 18 minutes to complete the coil-dry operation.)
It continues from coil-dry operation, it turns on electricity to Air clean unit, sterilization is
performed for 15 minutes.
Indoor unit fan motor operation under coil-clean operation : The cycle of 480rpm Fixation
5 sec ON / 1 min OFF is repeated.
(It takes 33 minutes to complete the air cleaning operation.)
(Table 9: COIL-DRY AND CLEAN Operating Functions)
ASU9RMLQ
ASU12RMLQ
ASU18RMLQ
Indoor Fan Speed
coil-drycoil-clean
900rpm
900rpm
900rpm
480rpm
480rpm
480rpm
Louver
Position
Operating COIL DRY : ON
Other indication : OFF
Main Unit
Indication
MW09/ 12/ 18Y3FM model (For Friedrich) is only COIL-DRY OPERATION.
20. AIR CLEAN OPERATION (Only for ASU9/ 12/18RMLQ)
The air clean operation switches ON and OFF as follows
every time it receives AIR CLEAN signal from remote controller.
Status before receiving Air Clean signalStatus upon receiving Air Clean signal
Operation stops
In operation
(Air Clean operation is OFF.)
Operation keeps stopping
It continues to operate
(Air Clean operation becomes ON.)
In operation
(Air Clean operation is ON.)
When Air Clean operation is ON, Indoor fan speed becomes at [S-Lo](480rpm),
and not at 0rpm even if the indoor fan is in stop condition.
Air Clean operation becomes OFF during the defrost operation.
It continues to operate
(Air Clean operation becomes OFF.)
01-18
21. ENERGY SAVE FUNCTION (For AR type)
1. During Cooling / Dry operation:
The thermostat temperature setting increases by 1 degC as soon as the ENERGY SAVE button is pressed,
and then increases by 1 degC after 1 hour later.
Afterwards, energy consumption is saved by continuing to cool or dry at a thermostat temperature of 2 degC
higher than setting temperature.
ENERGY
SAVE ON
1hour.
1 degC
2 degC
Setting
temperature
2. During Heating operation:
The thermostat temperature setting decreases by 1 degC as soon as the ENERGY SAVE button is pressed,
and then decreases by another 1 degC every 30 minutes.
Afterwards, energy consumption is saved by continuing to heat at a thermostat temperature of 4 degC
lower than setting temperature.
ENERGY
SAVE ON
1degC 2degC 3degC 4degC
30min.
1 hour.
1 hour
30 min.
Setting
temperature
22. DEFROST OPERATION CONTROL
1. CONDITION OF STARTING THE DEFROST OPERATION
The defrost operation starts when the outdoor heat exchanger temperature sensor detects
the temperature lower than the values shown in Table 9.
(Table 9 : Condition of starting Defrost Operation)
Compressor integrating
Compressor integrating
operation :Less than 45min.
Defrost Indicator:
[Operation lamp]
7 sec ON / 1 sec OFF
Outdoor fan motor OFF
4-way valve OFF
Compressor ON
(Frequency : 92 Hz)
Outdoor heat exchanger temperature: Over 53.6°F (12°C)
or
Compressor ON time: Over 15 minutes
Defrost end
01-20
23. VARIOUS PROTECTIONS
(1). DISCHARGE GAS TEMPERATURE OVERRISE PREVENSION CONTROL
The discharge gas thermosensor (discharge thermistor : Outdoor side) will detect discharge gas
temperature.
When the discharge temperature becomes higher than Temperature ,the compressor frequency
is decreased 20 Hz, and it continues to decrease the frequency for 20 Hz every 120 seconds until
the temperature becomes lower than Temperature .
When the discharge temperature becomes lower than Temperature ,the control of the control of the
compressor frequency is released.
When the discharge temperature becomes higher than Temperature ,the compressor is stopped
and the indoor unit LED starts blinking.
(Table 11 : Discharge Temperature Over Rise Prevension Control / Release Temperature)
Temperature
AOU24/36RML230°F(110°C)212°F(100°C)239°F(115°C)
Temperature
(2). CURRENT RELEASE CONTROL
The compressor frequency is controlled so that the outdoor unit input current does not exceeds
the current limit value that was set up with the outdoor temperature.
The compressor frequency returns to the designated frequency of the indoor unit at the time
when the frequency becomes lower than the release value.
Temperature
(3). ANTI-FREEZING CONTROL (Cooling mode)
The compressor frequency decreases on cooling mode when the indoor heat exchanger
temperature sensor detects the temperature lower than 37.4°F (3°C).
Then, the anti-freezing control is released when it becomes higher than 42.8°F (6°C).