General ARHA30LB, ARHA30LBTU, AOHA30LBTL, ARHA36LB, ARHA36LBTU Service Manual
...
SPLIT TYPE
ROOM AIR CONDITIONER
SERVICE
INSTRUCTION
Models Indoor unit Outdoor unit
AR*A30LBTU
AR*A36LBTU
DUCT
INVERTER
type
AO*A30LBTL
AO*A36LBTL
R410A
CONTENTS
1. SPECIFICATIONS
SPECIFICATIONS.......................................................................................................... 01-01
2. DIMENSIONS
DIMENSIONS.................................................................................................................. 02-01
3. REFRIGERANT SYSTEM DIAGRAM
REFRIGERANT CIRCUIT............................................................................................... 03-01
4. CIRCUIT DIAGRAM
CIRCUIT DIAGRAM........................................................................................................ 04-01
5. DESCRIPTION OF EACH CONTROL OPERATION
5-1 COOLING OPERATION............................................................................................
5-1-1 COOLING CAPACITY CONTROL......................................................................
5-2 HEATING OPERATION.............................................................................................
5-2-1 HEATING CAPACITY CONTROL......................................................................
5-3 DRY OPERATION......................................................................................................
5-3-1 INDOOR UNIT CONTROL.................................................................................
5-4 AUTO CHANGEOVER OPERATION........................................................................
5-5 INDOOR FAN CONTROL.........................................................................................
5-6 OUTDOOR FAN CONTROL......................................................................................
5-7 COMPRESSOR CONTROL......................................................................................
5-8 TIMER OPERATION CONTROL...............................................................................
5-9 ELECTRONIC EXPANSION VALVE CONTROL....................................................
5-10 PREVENT TO START FOR 3 MINUTES (3 MINUTES ST)....................................
5-12 4-WAY VALVE EXTENSION SELECT....................................................................
5-13 AUTO RESTART.....................................................................................................
5-14 PUMP DOWN (For AR*30/ 36/ 45LUAN/ 45/ 54LUAK)..........................................
05-01
05-01
05-02
05-02
05-03
05-03
05-04
05-05
05-07
05-08
05-09
05-10
05-10
05-11
05-11
05-11
5-15 COMPRESSOR PREHEATING...............................................................................
5-16 FRESH AIR CONTROL...........................................................................................
5-17 EXTERNAL ELECTRICAL HEATER CONTROL....................................................
5-18 DEFROST OPERATION CONTROL.......................................................................
5-19 OFF DEFROST OPERATION CONTROL...............................................................
5-20 ECONOMY OPERATION.........................................................................................
5-21 VARIOUS PROTECTIONS......................................................................................
5-22 FORCED COOLING OPERATION..........................................................................
5-23 COMPRESSOR STOP CONTROL..........................................................................
05-11
05-12
05-12
05-13
05-15
05-16
05-17
05-18
05-18
6. REFRIGERANT CAUTION -R410A-
6-1 R410A TOOLS............................................................................................................ 06-01
6-2 PRECAUTION FOR INSTALLATION.........................................................................
6-3 PRECAUTION FOR SERVICING...............................................................................
6-4 NEW REFRIGERANT R410A.....................................................................................
6-5 DEFFERENCE FROM CONVENTIONAL MODEL (R22) AND PRECAUTIONS.......
06-02
06-04
06-05
06-08
7. TROUBLE SHOOTING
7-1 ERROR DISPLAY......................................................................................................
7-1-1 WIRED REMOTE CONTROLLER DISPLAY......................................................
7-1-2 OUTDOOR UNIT DISPLAY................................................................................
7-2 TROUBLE SHOOTING WITH ERROR CODE..........................................................
7-3 TROUBLE SHOOTING WITH NO ERROR CODE....................................................
7-4 SERVICE PARTS INFORMATION............................................................................
07-01
07-01
07-03
07-04
07-30
07-35
8. APPENDING DATA
8-1 CAPACITY TABLE..................................................................................................... 08-01
8-2 OPERATION RANGE.................................................................................................
8-3 ELECTRIC CHARACTERISTICS...............................................................................
8-4 SAFETY DEVICE........................................................................................................
8-5 FUNCTION SETTING.................................................................................................
8-5-1 INDOOR UNIT....................................................................................................
8-5-2 Procedures to change the Function Setting........................................................
8-5-3 Procedures to change the Function Setting for wireless RC...............................
8-5-4 WIRED REMOTE CONTROLLER......................................................................
8-6 EXTERNAL INPUT & OUTPUT..................................................................................
9. INSTALLATION MANUAL
08-03
08-04
08-05
08-06
08-06
08-08
08-09
08-11
08-12
R410A
DUCT type
INVERTER
1 . SPECIFICATIONS
01-01
DUCT TYPE
AR A30-36L
DUCT TYPE
AR A30-36L
AR A30LBTU AR A36LBTU
Cooling A A
Heating A A
kW 8.50 9.40
BTU/h 29000 32100
kW 2.80 - 10.00 2.80 - 11.20
BTU/h 9500 - 34100 9500 - 38200
kW 10.00 11.20
BTU/h 34100 38200
kW 2.70 - 11.20 2.70 - 12.70
BTU/h 9200 - 38200 9200 - 43300
2.65 2.93
3.88 4.56
2.68 3.10
3.88 4.56
11.6 12.8
17.0 20.0
11.7 13.6
17.0 20.0
3.21 3.21
3.73 3.61
l/h (pints/h) 2.5(5.3) 3.0 (6.3)
High 1950 1950
Med 1620 1620
Low 1270 1270
Quiet 980 980
High 2100 2100
Med 1620 1620
Low 1270 1270
Quiet 980 980
Sirocco × 2 Sirocco × 2
W 197 197
Pa 30 to 150 30 to 150
High 42 42
Med 37 37
Low 32 32
Quiet 29 29
High 42 42
Med 37 37
Low 32 32
Quiet 29 29
294 × 1000 × 39.9 294 × 1000 × 39.9
1.40 1.40
3 × 14 3 × 14
Copper Copper
Aluminium Aluminium
Steel Steel
- -
270 × 1135 × 700 270 × 1135 × 700
300 × 1320 × 790 300 × 1320 × 790
40 (88) 40 (88)
47 (104) 47 (104)
9.52 ( 3/8 in.) 9.52 ( 3/8 in.)
15.88 ( 5/8 in.) 15.88 ( 5/8 in.)
Flare Flare
°C 18 to 32 18 to 32
%RH 80 or less 80 or less
°C 16 to 30 16 to 30
Wired Wired
Steel Steel
mm Outer diameter : 38.0 / Inner diameter : 36.0 Outer diameter : 38.0 / Inner diameter : 36.0
Note :
Specifications are based on the following conditions.
Cooling : Indoor temperature of 27°CDB/19°CWB. and outdoor temperature of 35°CDB/24°CWB.
Heating : Indoor temperature of 20°CDB/15°CWB. and outdoor temperature of 7°CDB/6°CWB.
Standard static pressure : 47 Pa
Pipe length : 5 m, Height difference : 0 m.(Outdoor unit - Indoor unit)
Sound pressure level : Install a 2m duct to the outlet port and a 1m duct to the suction poit and measure.
The maximum current and the maximum input value are the maximum value when operated within the operation (temperature)range.
Heating
Size
Liquid
Gas
Method
Cooling
Net
Gross
Net
Gross
Pipe type
Fin type
Material
Colour
Recommended static pressure
Dimensions (H × W × D)
Fin pitch
Rows × Stages
Model name
EER
COP
Moisture removal
DUCTED MODEL
INVERTER HEATPUMP
230V 50Hz
198 - 264V 50Hz
dB(A)
Remote controller type
Drain pipe
Material
Operation range
kg(lb.)
Connection pipe
Size
mm
Weight
m3/h
Fan
Dimensions
(H × W × D)
mm
Airflow
rate
Enclosure
Heat exchanger type
Sound pressure level
Heating
Cooling
Heating
Heating
Cooling
Cooling
Heating
Type × Q'ty
Motor output
Rated
*Max.
Rated
*Max.
kW/kW
Input power
Cooling
kW
Heating
Rated
*Max.
Current
Cooling
A
Power source
Available voltage range
Capacity
Cooling
Heating
European energy label
Type
mm
Rated
Min.-Max.
Rated
Min.-Max.
Rated
*Max.
1. SPECIFICATIONS FOR INDOOR UNIT
01-02
2. SPECIFICATIONS FOR OUTDOOR UNIT
OUTDOOR UNIT
AO A30-36L
OUTDOOR UNIT
AO A30-36L
AO A30LBTL AO A36LBTL
Power source
Available voltage range
A 15.0 15.0
Cooling 3600 4000
Heating 3800 3800
Type × Q'ty
Motor output W 103 103
Cooling 53 54
Heating 55 55
Dimensions (H × W × D)
798 × 900 × 36.4 798 × 900 × 36.4
Fin pitch 1.30 1.30
Rows x Stages 2 × 38 2 × 38
Pipe type
Fin type
Motor output W
Charge g
Material
Colour
Net
Gross
Net
Gross
Liquid
Gas
Method
Max. length 50(chargeless:20) 50(chargeless:20)
Max. height difference 30 30
Cooling
Heating
Note :
Specifications are based on the following conditions.
Cooling : Indoor temperature of 27 °CDB / 19 °CWB.and outdoor temperature of 35 °CDB/24 °CWB.
Heating : Indoor temperature of 20 °CDB / 15 °CWB.and outdoor temperature of 7 °CDB/6 °CWB.
Pipe length : 5 m, Height difference : 0 m.(Outdoor unit - Indoor unit)
°C
Operation range
Type
Model name
Fan
Airflow
rate
m3/h
dB(A)
mm
mm
Weight
kg(lb.)
Dimensions
(H × W × D)
Refrigerant oil
Type
Enclosure
Heat exchanger type
Starting current
Compressor
Type × Q'ty
Refrigerant
Type
Sound pressure level
m
Connection pipe
Size
mm
INVERTER HEATPUMP
230V 50Hz
198-264V 50Hz
Propeller × 1
9.52 ( 3/8 in.)
Copper
Aluminium
Steel sheet
Beige (10YR7.5/1.0NN)
Twin Rotary × 1
1700
R410A
PVE
2100
15.88 ( 5/8 in.)
Flare
-15 to 46
-15 to 24
830 × 900 × 330
62 ( 136 )
70 ( 154 )
970 × 1050 × 445
DUCT type
R410A
INVERTER
2 . DIMENSIONS
DUCT TYPE
AR A30-36L
DUCT TYPE
AR A30-36L
2. DIMENSIONS
Refrigerant piping flare connection (Gas)
Refrigerant piping flare connection (Liquid)
Drain piping connection
Drain piping connection with cap.
Knock out hole for fresh air.
Front view
Top view
Side view (L)
Side view (R)
Rear view
MODEL : AR A30L, AR A36L
(Unit : mm)
02-01
02-02
MODEL : AO A30L, AO A36L
MOUNTING POSITION
(Unit : mm)
When there are obstacles at the
back or front sides.
When there are obstacles at the
back, side(s), and top.
When there are obstacles at the
back, side with the installation of
more than one unit.
603
Air flow
900
650
830
370
99
196
21
9
77
31 330
400
170
147
12
600 m
m
or
mo
re
250
m
m
or more
250
m
m
or more
300
mm
or
m
o
re
600 mm or more
100
m
m
or more
30
0
m
m
or
m
o
r
e
1
0
0
mm
o
r mo
re
25
0
mm
or
more
(
S
ervic
e s
pace)
Top view
Front view
Side view
Bottom view
OUTDOOR UNIT
AO A30-36L
OUTDOOR UNIT
AO A30-36L
DUCT type
R410A
INVERTER
3 . REFRIGERANT SYSTEM DIAGRAM
03-01
3. REFRIGERANT CIRCUIT
MODEL : AO A30L, AO A36L
OUTDOOR UNIT
AO A30-36L
OUTDOOR UNIT
AO A30-36L
DUCT type
R410A
INVERTER
4 . CIRCUIT DIAGRAM
04-01
DUCT TYPE
AR A30-36L
DUCT TYPE
AR A30-36L
5.CIRCUIT DIAGRAM
MODEL : AR A30L, AR A36L
COIL
04-02
4.CIRCUIT DIAGRAMS
MODEL : AO A30L, AO A36L
OUTDOOR UNIT
AO A30-36L
OUTDOOR UNIT
AO A30-36L
DUCT type
R410A
INVERTER
5 . DESCRIPTION OF EACH
CONTROL OPERATION
5. DESCRIPTION OF EACH CONTROL OPERATION
36°C
34°C
32°C
30°C
21°C
19°C
12°C
10°C
2°C
0°C
5-1. COOLING OPERATION
5-1-1 COOLING CAPACITY CONTROL
A sensor (room temperature thermistor) built in the indoor unit will usually perceive
difference or variation between a set temperature and present room temperature, and
controls the operation frequency of the compressor.
The maximum frequency is limited in the range shown in Figure 1 based on the fan speed mode
and the outdoor temperature.
* If the room temperature is 2 °C higher than a set temperature,
the compressor operation frequency will attain to maximum frequency.
* If the room temperature is 2.5 °C lower than a set temperature, the compressor
will be stopped.
* When the room temperature is between +2 °C to -2.5 °C of the setting temperature,
the compressor frequency is controlled within the range shown in Table1.
( Table 1 : Compressor Frequency Range )
AR*A30LBTU
AR*A36LBTU
minimum
frequency
23Hz 94Hz
maximum
frequency
( Fig. 1 : Limit of Maximum Frequency based on Outdoor Temperature )
Outdoor air
temperature
When the room
temperature drops
A zone
B zone
C zone
D zone
E zone
F zone
When the room
temperature rises
Fan speed mode
AR*A30LBTU
AR*A36LBTU
A zone
B zone
C zone
D .E .F
zone
Hi
94Hz 76Hz 64Hz 51Hz
94Hz 76Hz 64Hz 51Hz
85Hz 64Hz 57Hz 51Hz
64Hz 57Hz 51Hz 45Hz
05-01
Me Lo Qu
5-2. HEATING OPERATION
19°C
17°C
14°C
12°C
5-2-1 HEATING CAPACITY CONTROL
A sensor (room temperature thermistor) built in the indoor unit will usually perceive
difference or variation between a set temperature and present room temperature, and
controls the operation frequency of the compressor.
The maximum frequency is limited in the range shown in Figure 2 based on the outdoor temperature.
* If the room temperature is lower 3 °C than a set temperature,
the compressor operation frequency will attain to maximum frequency.
* If the room temperature is higher 2.5 °C than a set temperature, the compressor
will be stopped.
* When the room temperature is between +2.5 °C to -3 °C of the setting temperature,
the compressor frequency is controlled within the range shown in Table2.
( Table 2 : Compressor Frequency Range )
AR*A30LBTU
AR*A36LBTU
minimum
frequency
23Hz
maximum
frequency
120Hz
( Fig.2 : Limit of Maximum Frequency based on Outdoor Temperature )
Outdoor air
temperature
When the room
temperature rises
A zone
B zone
C zone
AR*A30LBTU
AR*A36LBTU
When the room
temperature drops
Fan speed mode
A zone
B zone
C zone
Hi Me
120Hz 88Hz 76Hz 67Hz
Lo Qu
05-02
5-3. DRY OPERATION
5-3-1 INDOOR UNIT CONTROL
The compressor rotation frequency shall change according to set temperature and room
temperature variation which the room temperature sensor of the indoor unit has detected
as shown in the Fig 3.
( Table 3 : Compressor frequency )
[ AR*A30LBTU ]
[ AR*A36LBTU ]
Temperature zone
Operating frequency
X zone
Y zone
51Hz
0Hz
( Fig.3 : Compressor Control based on Room Temperature )
Room
temperature
Ts+0.5 °C
X zone
Compressor ON
Ts+1.5 °C
Ts : Setting temperature
Y zone
Compressor OFF
( Fig.4 : Indoor Fan Control )
Compressor
ON
OFF
Room
temperature
Indoor fan
Dry air flow
S-Lo
OFF
10 30 60 180 60 180 60 10 30
[ AR*A30/36LBTU : Dry air flow 550rpm, S-Lo 350rpm ]
05-03
(sec)
5-4. AUTO CHANGEOVER OPERATION
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 °C 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 below.
( Fig.5 : Operation mode selection based on Outdoor Temperature )
[ For AR*A30/ 36LBTU ]
C zone
Outdoor
temperature
( Table 4 : Operation mode selection table )
Outdoor temperature zone
Room temperature :Tb
Tb > Ts +2 °C
32°C
-15°C
B zone
A zone
A zone
Monitoring
B zone
Cooling
(Automatic Dry)
C zone
Cooling
(Automatic Dry)
Ts +2 °C > Tb > Ts -2 °C
Ts -2 °C > Tb
Ts : Setting temperature
2
When COOLING was selected at , the air conditioner operates as follow:
The same operation as COOLING OPERATION of item 5-1 above is performed.
However, the setting temperature is raised 1°C and the room temperature correct coefficient value is 0°C
When the compressor frequency have been below 23Hz for 8 minutes or the room temperature reaches
"setting temperature -1.5°C" , operation is automatically switched to DRY OPERATION of item 5-3 above
is performed.
However, compressor control based on room temperature is as follows.
If the room temperature reaches "setting temperature +2°C" during DRY operation,
operation returns to COOLING operation.
=
Room
temperature
Ts - 1.5°C
=
1
Compressor :ON
Compressor :OFF
Monitoring
Heating
Ts - 0.5°C
Monitoring
Heating
Monitoring
Monitoring
3
When HEATING was selected at , the same operation as HEATING OPERATION of item 5-2
above is performed. However, the room temperature correct coefficient value is 0°C.
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
05-04
5-5. INDOOR FAN CONTROL
1. Fan speed
( Table 5 : Indoor Fan Speed )
AR*A30LBTU
AR*A36LBTU
Operation mode Air flow mode Speed (rpm)
Cooling
Heating
Dry
Monitoring
2. FAN OPERATION
The airflow can be switched in 5 steps such as AUTO, QU, LOW, MED, HIGH, while the indoor
fan only runs.
When [AUTO] is selected, the indoor fan motor runs continuously [MED] mode.
Hi 1170
Me
Lo
Qu
Hi 1270
Me+
Me
Lo
Qu
Cool Air Prevention
Auto
S-Lo 370
980
790
630
980
790
630
630
3. COOLING OPERATION
Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature,
as shown in Figure 5.
On the other hand, if switched in [HIGH] [QU], the indoor motor will run at a constant airflow of [COOL]
operation modes QU, LOW, MED, HIGH,as shown in Table 6.
( Fig.6 : Airflow change - over ( Cooling : AUTO ) )
TR : Room temperature
TR-Ts > 2 °C
=
2 °C > TR-Ts > 1 °C
=
1 °C > TR-Ts
HIGH mode
MED mode
LOW mode
When the room
temperature drops
TR-Ts > 2.5 °C
=
2.5 °C > TR-Ts > 1.5 °C
1.5 °C > TR-Ts
When the room
temperature rises
=
Ts : Setting temperature
05-05
4. HEATING OPERATION
Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature,
as shown in Figure 7.
On the other hand, if switched in [HIGH] [QU], the indoor motor will run at a constant airflow
of [HEAT] operation modes QU, LOW, MED, HIGH, as shown in Table 5.
( Fig.7 : Airflow change - over ( Heating : AUTO ) )
TR : Room temperature
Ts : Setting temperature
TR-Ts > - 1 °C
=
- 1 °C> TR-Ts > - 2 °C
- 2 °C> TR-Ts
=
When the room
temperature rises
LOW mode
MED mode
HIGH mode
When the room
temperature drops
TR-Ts > - 1.5 °C
=
- 1.5 °C> TR-Ts > - 2.5 °C
- 2.5 °C> TR-Ts
=
5. COOL AIR PREVENTION CONTROL (Heating mode)
When the compressor operates, the maximum value of the indoor fan speed is set as shown in Figure 8,
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.8 : Cool Air Prevention Control )
(1) Fan mode : HIGH (2) Fan mode : MED, LOW, QUIET
Indoor heat exchanger
temperature
HIGH mode
37°C
LOW mode
30°C
S-LOW mode
Indoor heat exchanger
temperature
32°C
24°C
Indoor heat exchanger
temperature
SETTING
FAN MODE
37°C
LOW mode
30°C
S-LOW mode
Indoor heat exchanger
temperature
32°C
24°C
6. DRY OPERATION
Refer to the Figure 4.
During the dry mode operation, the fan speed setting can not be changed.
05-06
5-6. OUTDOOR FAN CONTROL
1. Outdoor Fan Motor
1-1. For AO*A30/ 36LBTL ( AB*A30 / 36LBT , AR*A30 / 36LBTU )
Following table shows the fan speed of the outdoor unit.
Table 6 : Fan speed of the outdoor unit
Outdoor temperature [Ta]
AO*A30LBTL
AO*A36LBTL
AO*A30LBTL
AO*A36LBTL
Outdoor temperature zone
D zone ( Normal )
12°C
F zone
2°C
G zone
Ta > 12°C
12°C > Ta > 2°C
2°C > Ta
Heating
900/ 780/ 700/ 550/ 450 rpm
10°C
0°C
Cooling
900/ 850/ 780/ 700/ 500 rpm
340/ 320/ 250/ rpm
260/ 250/ rpm
Dry
500 rpm
340/ 320/ 250/ rpm
260/ 250/ rpm
The outdoor fan speed is changed in the range of the speed shown in the above table,
based on the frequency of the compressor.
(When the compressor frequency increases, the outdoor fan speed is also changed to
higher speed. If the compressor frequency decreases, the outdoor fan speed is changed
to the lower speed as well.)
After starting up the outdoor fan, it operates with the following speed for initial 20 seconds.
Table 7 : Fan speed when starting up outdoor fan
Outdoor temperature zone
AO*A30LBTL
AO*A36LBTL
COOL D zone (Normal) / HEATING
COOL F,G zone
After operating the defrost control function on heating mode except economy operation,
its speed becomes 900rpm (AO*A30 / 36LBTL)
regardless of the compressor frequency.
However, it returns to the normal speed control when the defrosting operation does not function
for 240 minutes after releasing the defrost operation or when the outdoor temperature sensor
detection value becomes higher than 5°C.
Fan speed
500 rpm
200 rpm
05-07
5-7. COMPRESSOR CONTROL
1. OPERATION FREQUENCY RANGE
The operation frequency of the compressor is different based on the operation mode as
shown in Table 9.
(Table 9 : Compressor Operation Frequency Range)
Cooling Heating
Min Max Min Max
Dry
AO*A30LBTL
AO*A36LBTL
23Hz
94Hz
23Hz
120Hz
51Hz
2. OPERATION FREQUENCY CONTROL AT START UP
2-1. For AO*A30/ 36LBTL
The compressor frequency soon after the start-up is controlled as shown in Figure 13.
(Fig.8 : Compressor Control at Start-up)
59Hz
40Hz
46sec
60sec 100sec
05-08
5-8. TIMER OPERATION CONTROL
5-8-1 Wired Remote Controlle
AR-6TC1
ON / TIMER
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
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. 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 time Set time Set time
Operation mode
Stop mode
05-09
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 day Next day
Setting day
Stop mode
Next day setting
DAY OFF
Stop mode
Operation mode
Stop mode
Preceding day Next 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.
26°C
22°C
26°C
24°C
22°C
ON OFF OFFON
Chenge the setting temperature:
22°C 24°C
+1
05-09
5-9. 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, the
indoor heat exchanger sensor, the outdoor heat exchanger sensor, and the outdoor temperature
sensor.
(1) Pulse range of EEV
Pulse range
53 480 pulse
40 480 pulse
AR*A30LBTU
AR*A36LBTU
Operation
Cooling/ Dry
Heating
(2) The EEV is set up at 480 pulses when the compressor is stopped.
(3) Intialization (Input of 528 pulses toward closing direction) is operated under
the following condition.
* When the power is turned on.
* 4 hours has passed since the last initialization, and 3 minutes has passed after
the compressor stop.
(If 12 hours has passed since the last initialization, the compressor is compulsorily stopped.)
5-10. 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.
05-10
5-12. 4-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.
5-13. 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 resumed with
the memorized operation contents.
When the power is interrupted and recovered during timer operation, timer operation is canceled,
but only setting time is memorized.
[Operation contents memorized when the power is interrupted]
Operation mode
Set temperature
Set air flow
Timer mode and timer time
Thermistor detected position (When using the Wired Remote Controller)
5-14 PUMP DOWN ( For AR*A30/ 36LBTU )
Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit.
When the product is stopped:
1. Press the PUMP DOWN switch (SW2) on the outdoor unit.
(The LED on the outdoor unit circuit board starts lighting.)
2. The pump down operation (cooling operation) begins right away.
After operation starts, close the 3-way valve (liquid).
3. After 2-3minutes, operation stops. Close the 3-way valve (gas) within 1minute after operations stops.
4. The LED will go out 3minutes after it stops. Disconnect the power supply after confirming that
the LED has gone out.
When the product is operating:
1. Press the PUMP DOWN switch (SW2) on the outdoor unit. The LED on the outdoor unit circuit board starts
lighting, and operation stops.
At this point, recovery has not been completed, so do not close the 3-way valves (liquid and gas).
2. The pump down operation (cooling operation) begins after 3minutes.
Close the 3-way valve (liquid) after operation starts.
3. After 2-3minutes, operation stops. Close the 3-way valve (gas) within 1minute after operations stops.
4. The LED will go out 3minutes after it stops. Disconnect the power supply after confirming that
the LED has gone out.
5-15. COMPRESSOR PREHEATING
When the outdoor heat exchanger temperature is lower than 5°C and the heating operation
has been stopped for 30 minutes, power is applied to the compressor and 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 7°C or greater,
preheating is ended.
05-11
5-16. FRESH AIR CONTROL
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
5-17. EXTERNAL ELECTRICAL HEATER CONTROL
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
05-12
5-18 . 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 12.
(Table 12 : Condition of starting Defrost Operation)
1st time defrosting after starting operation
Compressor contiguous
operation time
Compressor integrating
operation time
Operation
temperature
Below 10 min.
Less than 17 min.
Does not operate
17 to 62 min.
- 9°C
Above 10 min.
62 min. to 4 hours
- 5°C
Defrosting after 2nd time upon starting operation
Compressor contiguous
operation time
Compressor integrating
operation time
Operation
temperature
Below 10 min.
Less than 35 min.
Does not operate
Above 10 min.
35 min. to 4 hours
- 6°C
After 4 hours
- 3°C
2. CONDITION OF THE DEFROST OPERATION COMPLETION
Defrost operation is released when the conditions become as shown in Table 13.
After 4 hours
- 3°C
(Table 13 : Defrost Release Condition)
Release Condition
Outdoor heat exchanger temperature sensor value is higher than +13°C or
Compressor operation time has passed 15 minutes.
05-13
3. Defrost Flow Chart
The defrosting shall proceed by the integrating operation time
and outdoor heat exchanger emperature as follows.
Heating operation start : Compressor ON
(Not defrosted for 10 minutes)
Compressor integrating
operation:
Over 17 minutes to
below 62 minutes
Outdoor
heat exchanger
temperature:
Below - 9°C
Outdoor temp Outdoor heat exchanger
temperature:
Above 5 degC
(In case of 1st defrost)
Compressor integrating
operation:
Over 62 minutes to
below 240 minutes
Outdoor
heat exchanger
temperature:
Below - 5°C
Compressor integrating
operation:
Over 240 minutes
Outdoor
heat exchanger
temperature:
Below - 3°C
(In case of 2nd and later defrost)
Compressor integrating
operation:
Over 35 minutes to
below 240 minutes
Outdoor
heat exchanger
temperature:
Below - 6°C
Compressor integrating
operation:
Over 240 minutes
Outdoor
heat exchanger
temperature:
Below - 3°C
Defrost start
Defrost Indicator:
[Operation lamp]
7 sec ON / 2 sec OFF
Outdoor fan : OFF
Compressor frequency : 0 Hz
EEV : 480pulse
4-way valve : OFF
Outdoor fan : OFF
Compressor frequency : 70Hz
Outdoor heat exchanger temperature: Over 13°C
or
Compressor ON time: Over 15 minutes
Defrost end
AR*A30/ 36LBTU
05-14
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