Fujitsu ARYG72LHTA Original operating manual

SPLIT TYPE
ROOM AIR CONDITIONER
DUCT type
Models Indoor unit Outdoor unit
ARYG72LHTA
ARYG90LHTA
AOYG72LRLA
AOYG90LRLA
INVERTER
SERVICE
INSTRUCTION
R410A

CONTENTS
1. SPECIFICATIONS
1. DESCRIPTION OF EACH CONTROL OPERATION
1-1 SYSTEM OUTLINE
1-5 AUTO CHANGEOVER OPERATION........................................................................
1-6 INDOOR FAN CONTROL.........................................................................................
1-7 OUTDOOR FAN CONTROL......................................................................................
1-8 COMPRESSOR CONTROL......................................................................................
01-01
1-3 HEATING OPERATION............................................................................................. 01-03
1-4 DRY OPERATION...................................................................................................... 01-04
01-05
01-07
01-10
01-11
1-9 ELECTRONIC EXPANSION VALVE CONTROL...................................................... 01-12
1-10 TEST OPERATION CONTROL............................................................................... 01-12
1-11 PREVENT TO START FOR 3 MINUTES (3 MINUTES ST).................................... 01-12
1-12 4-WAY VALVE EXTENSION SELECT.................................................................... 01-12
1-13 AUTO RESTART..................................................................................................... 01-12
1-14 PUMP DOWN.......................................................................................................... 01-13
1-15 COMPRESSOR PREHEATING............................................................................... 01-14
1-16 10°C HEAT OPERATION ........................................................................................... 01-14
1-20 VARIOUS PROTECTIONS...................................................................................... 01-18
1-21 COMPRESSOR STOP CONTROL.......................................................................... 01-22
1-23 LOW NOISE OPERATION...................................................................................... 01-23
1-19 OFF DEFROST OPERATION CONTROL............................................................... 01-17
1-18 DEFROST OPERATION CONTROL....................................................................... 01-15
1-17 ECONOMY OPERATION........................................................................................ 01-14
1-22 AUTOMATIC AIRFLOW ADJUSTMENT.................................................................. 01-22
1-24 DRAIN PUMP OPERATION ( OPTION ) .................................................................01-24
1-25 PEAK CUT OPERATION ..........................................................................................
01-25
2-1 ERROR DISPLAY......................................................................................................
2. TROUBLE SHOOTING
2-2 TROUBLE SHOOTING WITH ERROR CODE..........................................................
2-3 TROUBLE SHOOTING WITH NO ERROR CODE....................................................
2-4 SERVICE PARTS INFORMATION............................................................................
02-01
02-39
02-03
02-44
1-26 DESCRIPTION OF DISPLAY UNIT ......................................................................... 01-26
1-2 COOLING OPERATION............................................................................................ 01-02
...................................................................................................

CONTENTS
3. APPENDING DATA
3-1 FUNCTION SETTING................................................................................................. 03-01
3-2 THERMISTOR RESISTANCE VALUES..................................................................... 03-06
3-3 EXTERNAL INPUT AND OUTPUT............................................................................. 03-08
3-4 BUZZER SOUND........................................................................................................ 03-19
3-5 SEPARATION METHOD............................................................................................. 03-22
3-6 INSTALLATION OF ZONE CONTROL INTERFACE................................................. 03-23

1 . DESCRIPTION OF EACH
CONTROL OPERATION
R410A
DUCT type
INVERTER

1-1. SYSTEM OUTLINE
01-01
NOTE :
When checking it, ON-OFF do a power supply of both of indoor unit and outdoor unit.
When power supply ON-OFF doesn’t do both of indoor unit and outdoor unit, it doesn’t move.
When electricity was supplied only in indoor unit.
LED in control PCB light’s and it doesn’t move.
When electricity was supplied only in outdoor unit.
There is no lighting up of LED in control PCB, but it’s serial error and does’t move.
: Power supply [Outdoor Unit] ( )
: Piping ( )
: Transmission line [O.U. - I.U] ( )
: Power supply [Indoor Unit] ( )
: Remote controller line [I.U. - R.C.] ( )
Earth leakage
breaker
Power
supply
Circuit breaker
(over current)
Power
supply
Earth leakage
breaker
Circuit breaker
(over current)
Outdoor unit
Indoor unit
50Hz
230V50Hz

1-2. COOLING OPERATION
1-2-1 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.
* If the room temperature is 6.0°C higher than a set temperature,
the compressor operation frequency will attain to maximum performance.
* If the room temperature is 1.0°C lower than a set temperature, the compressor
will be stopped.
* When the room temperature is between +6.0°C to -1.0°C of the setting temperature,
the compressor frequency is controlled within the range shown in Table1.
However, the maximum frequency is limited in the range shown in Fig.1 based on the
fan speed mode and the outdoor temperature.
minimum
frequency
maximum
frequency
15rps 81rps
ARYG72LHTA
15rps 90rps
ARYG90LHTA
Hi Me Lo Qu
78rps
78rps
59rps
53rps 45rps 43rps
55rps
55rps
53rps
53rps
53rps 45rps
33rps
43rps
43rps
38rps
A zone
B zone
C zone
D-F zone
A zone
B zone
C zone
D-F zone
ARYG72LHTA
( Table 1 : Compressor Frequency Range )
( Fig. 1 : Limit of Maximum Frequency based on Outdoor Temperature )
01-02
84rps
84rps
66rps
55rps 46rps 43rps
60rps
60rps
55rps
55rps
55rps 46rps
33rps
43rps
43rps
38rps
ARYG90LHTA
Fan speed mode
Outdoor air
temperature
A zone
B zone
C zone
D zone
E zone
F zone
When the room
temperature rises
When the room
temperature drops
36°C
32°C
21°C
12°C
2°C
34°C
30°C
19°C
10°C
0°C

01-03
1-3. HEATING OPERATION
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.
* If the room temperature is lower 6.0°C than a set temperature,
the compressor operation frequency will attain to maximum performance.
* If the room temperature is higher 1.0°C than a set temperature, the compressor
will be stopped.
* When the room temperature is between +1.0°C to -6.0°C of the setting temperature,
the compressor frequency is controlled within the range shown in Table2.
( Table 2 : Compressor Frequency Range )
minimum
frequency
maximum
frequency
15rps 81rps
15rps 90rps
ARYG72LHTA
ARYG90LHTA

1-4. DRY OPERATION
1-4-1 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 Table 3.
( Table 3 : Compressor frequency )
( Fig.2 : Compressor Control based on Room Temperature )
01-04
Ts : Setting temperature
Ts+0.5°C
Ts+1.5°C
Operating frequency
38rps
X zone
J zone
0rpsY zone
Room Room
temperature temperature
X zone
J zone
Y zone
Ts-1.5°C
Ts-0.5°C
( Fig.3 : Indoor Fan Control )
60sec 60sec 10sec
60sec
60sec
180sec 30sec 180sec
Set air volume
Fan speed ( at the time of )
thermo-off or compressor-off
S-Lo
Fan off
Prevents moisture return Odor prevention Prevents moisture return
Operation
start
Thermo-on and
compressor-on
Thermo-off or
compressor-off

1-5. AUTO CHANGEOVER OPERATION
01-05
When the air conditioner is set to the Auto mode by remote controller, operation starts in the optimum
mode from among the Heating, Cooling, and Monitoring mode. During operation, the
optimum mode is automatically switched in accordance with temperature changes. The temperature
can be set between 18°C and 30°C in 0.5°C (wireless and 2 wire remote controller) or
1.0°C(standard remote controller) steps.
When operation starts, indoor fan and outdoor fan are operated for around 1 minutes.
Room temperature and outdoor temperature are sensed, and the operation mode is selected
in accordance with the table below. <Monitoring mode>
( Table 4 : Operation mode selection table )
Room temperature (TR)
TR> Ts+2°C
Ts+2°C TR Ts -2°C *Middle zone
TR < Ts -2°C Heating
When the compressor was stopped for 6 consecutive minutes by the temperature control function
after the Cooling or Heating mode was selected at above, operation is switched
to Monitoring and the operation mode is selected again.
When the middle zone is selected on the predetermining of the operation mode, the operation mode
before the changing to the monitor mode is selected.
1
2
3
1
( Fig.4 : Outdoor temperature zone selection )
Cooling
Operation mode
Temperature
25°C and over
25°C under Heating
Cooling
Mode
*If it's Middle zone, operation mode of indoor unit is selected as below.
(1). Same operation mode is selected as outdoor unit.
If outdoor unit is operating in Cooling and Heating mode,
indoor unit will be operated by the same operation mode.
(2). Selected by the outdoor temperature.
If outdoor unit is operating in other than Cooling and Heating mode, indoor unit will be operated
according to the outdoor temperature as below.
TR : Room temperature
Ts : Setting temperature

01-06
START
Room temp.
Ts+2°C?
COOLING OPERATIONHEATING OPERATION
YES
Auto change over is
second or more?
NO
NO
YES
NO
NO
AUTO CHANGEOVER operation flow chart
TS: Setting temperature
Room temp.
Ts -2°C?
Thermostat remains
in OFF state for 6 minutes or
longer?
System stops
or operation command other than
auto changeover operation?
NO
Thermostat remains
in OFF state for 6 minutes or
longer?
System stops
or operation command other than
auto changeover operation?
Middle zone
NO
NO
Operation mode of
outdoor unit : Cooling?
YES
NO
Operation mode of outdoor unit
: Heating?
YES
NO
YES
Outdoor temperature<
25°C?
NO
YES
YES
YES
NO
YES
YES
Operation mode
before the monitor mode is
cooling mode?
Monitor mode