Fujitsu AU G18LVLB Series Original operating manual

Models Indoor unit Outdoor unit
AU*G18LVLB
AU*G22LVLA
AU*G24LVLA
AU*G30LRLE
AU*G36LRLE
AU*G45LRLA
AB*G18LVTB
AB*G22LVTA
AB*G24LVTA
AB*G30LRTE
AB*G36LRTE
AB*G45LRTA
AR*G18LLTB
AR*G22LMLA
AR*G24LMLA
AR*G30LMLE
AR*G36LMLE
AR*G45LMLA
AO*G72LRLA
AO*G90LRLA
SERVICE
INSTRUCTION
R410A
SPLIT TYPE
ROOM AIR CONDITIONER
Compact cassette / cassette
Slim Duct / DUCT
Floor/Ceiling / Ceiling type
SIMULTANEOUS MULTI

CONTENTS
1. SPECIFICATIONS
1. DESCRIPTION OF EACH CONTROL OPERATION
1-1 SYSTEM OUTLINE.....................................................................................................
1-5 OUTDOOR FAN CONTROL.......................................................................................
1-6 COMPRESSOR CONTROL........................................................................................
1-7 LOUVER CONTROL...................................................................................................
1-8 ELECTRONIC EXPANSION VALVE CONTROL.......................................................
01-01
1-3 AUTO CHANGEOVER OPERATION......................................................................... 01-02
1-4 INDOOR FAN CONTROL........................................................................................... 01-04
01-08
01-09
01-10
01-16
1-9 TEST OPERATION CONTROL.................................................................................. 01-16
1-10 PREVENT TO RESTART FOR 3 MINUTES ( 3 MINUTES ST ) ..............................01-16
1-11 4-WAY VALVE EXTENSION SELECT..................................................................... 01-16
1-12 AUTO RESTART.......................................................................................................01-16
1-13 PUMP DOWN............................................................................................................01-17
1-14 COMPRESSOR PREHEATING................................................................................ 01-18
1-15 10°C HEAT OPERATION.......................................................................................... 01-18
1-16 ECONOMY OPERATION..........................................................................................01-18
1-20 AUTOMATIC AIRFLOW ADJUSTMENT..................................................................01-22
1-21 VARIOUS PROTECTIONS........................................................................................01-23
1-23 DRAIN PUMP OPERATION (OPTION).....................................................................01-28
1-19 COMPOMRESSOR SPEED CONTROL .................................................................. 01-22
1-18 OFF DEFROST OPERATION CONTROL................................................................01-21
1-17 DEFROST OPERATION CONTROL........................................................................ 01-19
1-22 LOW NOISE OPERATION........................................................................................01-27
1-24 PEAK CUT OPERATION..........................................................................................01-29
1-25 DESCRIPTION OF DISPLAY UNIT...........................................................................01-30
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
02-47
02-06
02-52
1-2 CAPACITY CONTROL............................................................................................... 01-02
3. APPENDING DATA
3-1 FUNCTION SETTING................................................................................................. 03-01
3-2 EXTERNAL INPUT AND OUTPUT..............................................................................03-06

1 . DESCRIPTION OF EACH
CONTROL OPERATION
R410A
Compact cassette / cassette
Slim Duct / DUCT
Floor/Ceiling / Ceiling type
SIMULTANEOUS MULTI

1-1. SYSTEM OUTLINE
01-01
Power cable
Junction box—indoor unit (primary) 3-wires
Junction box—indoor unit (secondary) 2-wires
Outdoor unit 4-wires
Bus wire Indoor unit—indoor unit 3-wires
Remote controller cable 3-wires
Example:
Outdoor unit
Remote controller
Power cable
6.0 mm2× 2-wires
Junction box
(Locally purchased)
Power cable
(Junction box - indoor unit
connection cable)
1.5 mm2× 3-wires
Power cable
(Junction box - indoor unit
connection cable)
1.5 mm2× 2-wires
Remote controller cable
0.33 mm
2
× 3-wires
Bus wire
(Indoor unit - indoor unit
connection cable)
0.33 mm2× 3-wires
Main breaker
30 A
Power supply
400 V ~ 50 Hz
Indoor unit
(Secondary)
Indoor unit
(Primary)

1-3. AUTO CHANGEOVER OPERATION
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 1 : 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.1 : 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
1-2. CAPACITY CONTROL
Compressor frequency decides by capacity of an indoor unit, operation number of an indoor unit,
set temperature, room temperature and outside temperature.
01-02

01-03
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

1-4. INDOOR FAN CONTROL
1. Fan speed
(Table 2 : Indoor Fan Speed)
Operation mode Air flow mode Speed (rpm)
Cooling
Fan
Heating
Dry
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
S-Lo
830
770
730
630
500
400
730
630
540
460
400
460
300
AU *G18LVLB
*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.
(Hi > Me, Me > Lo, Lo > Quiet, Quiet > Soft Quiet)
960
930
880
740
580
400
960
850
650
500
400
500
300
AU *G22/ 24LVLA
Operation mode Air flow mode Speed (rpm)
Cooling
Fan
Heating
Dry
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
S-Lo
1380
1300
1220
1140
1380
1300
1220
1140
600
1140
600
AR *G18LLTB
(Normal static pressure: 25Pa)
Operation mode Air flow mode Speed (rpm)
Cooling
Fan
Heating
Dry
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
S-Lo
640
600
510
470
420
300
640
510
470
420
300
420
270
AU *G36LRLE
Operation mode Air flow mode Speed (rpm)
Cooling
Fan
Heating
Dry
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
*Soft Quiet
S-Lo
570
530
510
470
420
300
570
510
470
420
300
420
270
AU *G30LRLE
Operation mode Air flow mode Speed (rpm)
Cooling
Fan
Heating
Dry
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
*Soft Quiet
S-Lo
Operation mode Air flow mode Speed (rpm)
Cooling
Fan
Heating
Dry
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
S-Lo
830
700
600
550
830
700
600
550
350
550
350
AR *G22/ 24LMLA
(Normal static pressure: 35Pa)
Operation mode Air flow mode Speed (rpm)
Cooling
Fan
Heating
Dry
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
S-Lo
1270
980
790
630
1130
980
790
630
630
420
AR *G30/ 36LMLE
(Normal static pressure: 47Pa)
690
650
610
550
470
300
690
610
550
470
300
470
270
AU *G45LRLA
Operation mode Air flow mode Speed (rpm)
Cooling
Fan
Heating
Dry
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
S-Lo
1300
1020
840
670
1310
1020
840
670
420
670
420
AR *G45LMLA
(Normal static pressure: 30Pa)
Operation mode Air flow mode Speed (rpm)
Cooling
Fan
Heating
Dry
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
S-Lo
*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.
(High > Med, Med > Low, Low > Quiet, Quiet > Soft Quiet)
01-04

*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.
(Hi > Me, Me > Lo, Lo > Quiet, Quiet > Soft Quiet)
Operation mode Air flow mode Speed (rpm)
Cooling
Fan
Heating
Dry
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
S-Lo
1040
1000
950
800
740
500
1040
950
800
740
500
740
300
AB *G18LVTB
1300
1200
1150
1000
780
500
1330
1150
1000
780
500
780
300
AB *G22/ 24LVTA
Operation mode Air flow mode Speed (rpm)
Cooling
Fan
Heating
Dry
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
S-Lo
1000
1000
910
750
650
500
1000
910
750
650
500
650
250
AB *G30LRTE
Operation mode Air flow mode Speed (rpm)
Cooling
Fan
Heating
Dry
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
S-Lo
1100
1100
910
750
650
500
1100
910
750
650
500
650
250
AB *G36LRTE
Operation mode Air flow mode Speed (rpm)
Cooling
Fan
Heating
Dry
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
S-Lo
1200
1100
1000
830
680
500
1200
1000
830
680
500
680
250
AB *G45LRTA
Operation mode Air flow mode Speed (rpm)
Cooling
Fan
Heating
Dry
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
S-Lo
01-05

2. FAN OPERATION
The airflow can be switched in 5 steps such as Auto, Quiet, Low, Med, High, while the indoor
fan only runs.
3. COOLING OPERATION (Auto : Cooling)
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 ) )
When the room
temperature rises
When the room
temperature drops
Tr : Room temperature
Ts : Setting temperature
Tr-Ts > 2 °C
=
1 °C > Tr-Ts
2 °C > Tr-Ts > 1 °C
=
Tr-Ts > 2.5 °C
=
1.5 °C > Tr-Ts
2.5 °C > Tr-Ts > 1.5 °C
=
High
Med
Low
4. HEATING OPERATION (Auto : Heating)
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 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.
( Fig 3 : Airflow change - over ( Heating : Auto ) )
Tr-Ts > - 1.5 °C
=
- 2.5 °C> Tr-Ts
- 1.5 °C> Tr-Ts > - 2.5 °C
=
Tr-Ts > - 1 °C
=
- 2 °C> Tr-Ts
- 1 °C> Tr-Ts > - 2 °C
=
When the room
temperature rises
When the room
temperature drops
Tr : Room temperature
Ts : Setting temperature
Low
Med
High
01-06

6. DRY OPERATION
Refer to the Table2
During the DRY mode operation, the fan speed setting can not be changed.
5. COOL AIR PREVENTION CONTROL (Heating mode)
The maximum value of the indoor fan speed is set as shown in Figure 4, 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] or [Stop] mode.
( Fig 4 : Cool Air Prevention Control )
[ Cassette, Ceiling type ]
[ Duct type ]
*Hi
or setting fan mode
*Lo
or setting fan mode
37°C
29°C
32°C
24°C
Indoor heat exchanger
temperature rises Indoor heat exchanger
temperature drops
Cool air
prevention
S-Lo
S-Lo
42°C
30°C
34°C
Indoor heat exchanger
temperature rises Indoor heat exchanger
temperature drops
Hi
*Me+
or setting fan mode
*Lo
or setting fan mode
*Lo
or setting fan mode
*Lo
or setting fan mode
39°C
37°C
37°C
32°C
24°C
*Lower speed is selected.
42°C
30°C
34°C
Indoor heat exchanger
temperature rises Indoor heat exchanger
temperature drops
Hi
*Me+
or setting fan mode
*Lo
or setting fan mode
39°C
37°C
37°C
32°C
24°C
*Lower speed is selected.
*Lower speed is selected.
Hi
*Lo
or setting fan mode
*Lo
or setting fan mode
37°C
29°C
32°C
24°C
Indoor heat exchanger
temperature rises Indoor heat exchanger
temperature drops
*Lower speed is selected.
13 min. later
13 min. later
01-07