Fujitsu Siemens Computers AU* G45LRLA Original operating manual

SPLIT TYPE
ROOM AIR CONDITIONER
Cassette type
Duct type
Ceiling type
Models Indoor unit Outdoor unit
AU* G45LRLA
AR* G45LMLA
AR* G45LHTA
AB* G45LRTA
AU* G54LRLA
AR* G54LHTA
AO* G45LETL
AO* G54LETL
INVERTER
SERVICE
INSTRUCTION
R410A

CONTENTS
1. SPECIFICATIONS
1. DESCRIPTION OF EACH CONTROL OPERATION
1-1 COOLING OPERATION..............................................................................................
1-4 AUTO CHANGEOVER OPERATION.........................................................................
1-5 INDOOR FAN CONTROL...........................................................................................
1-6 OUTDOOR FAN CONTROL.......................................................................................
1-7 COMPRESSOR CONTROL.......................................................................................
01-01
1-2 HEATING OPERATION.............................................................................................. 01-02
1-3 DRY OPERATION....................................................................................................... 01-03
01-04
01-06
01-09
01-10
1-8 TIMER OPERATION CONTROL................................................................................ 01-11
1-9 ELECTRONIC EXPANSION VALVE CONTROL....................................................... 01-15
1-10 TEST OPERATION CONTROL............................................................................... 01-15
1-11 PREVENT TO START FOR 3 MINUTES (3 MINUTES ST)..................................... 01-16
1-12 4-WAY VALVE EXTENSION SELECT..................................................................... 01-16
1-13 AUTO RESTART...................................................................................................... 01-16
1-14 PUMP DOWN........................................................................................................... 01-17
1-15 COMPRESSOR PREHEATING............................................................................... 01-18
1-16 10°C HEAT OPERATION (For AB type).................................................................. 01-18
1-20 VARIOUS PROTECTIONS....................................................................................... 01-22
1-21 COMPRESSOR STOP CONTROL........................................................................... 01-24
1-19 OFF DEFROST OPERATION CONTROL................................................................ 01-21
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
02-30
02-04
02-35
1-18 DEFROST OPERATION CONTROL........................................................................ 01-19
1-17 ECONOMY OPERATION......................................................................................... 01-18
1-27 DESCRIPTION OF DISPLAY UNIT.......................................................................... 01-27
1-24 LOW NOISE OPERATION....................................................................................... 01-25
1-25 PEAK CUT OPERATION.......................................................................................... 01-25
1-26 DRAIN PUMP OPERATION (For AU/ AR type)...................................................... 01-26
1-23 EXTERNAL ELECTRICAL HEATER CONTROL..................................................... 01-25
1-22 FRESH AIR CONTROL............................................................................................ 01-24

1 . DESCRIPTION OF EACH
CONTROL OPERATION
R410A
Cassette/ Duct/ Ceiling type
INVERTER

1-1. COOLING 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 2°C higher than a set temperature,
the compressor operation frequency will attain to maximum performance.
* 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.
However, the maximum frequency is limited in the range shown in Figure 1 based on the
fan speed mode and the outdoor temperature.
minimum
frequency maximum frequency
16rps
16rps
16rps
16rps
93rps
90rps
85rps
100rps
AU* G45LRLA
AR* G45LMLA
AB* G45LRTA
AR* G45LHTA
AU* G54LRLA
AR* G54LHTA
Hi Me Lo Qu
93rps
93rps
78rps
73rps
75rps
75rps
68rps
56rps
68rps
68rps
56rps
47rps
44rps
44rps
44rps
29rps
100rps
100rps
85rps
76rps
78rps
78rps
73rps
62rps
73rps
73rps
62rps
50rps
44rps
44rps
44rps
29rps
85rps
85rps
78rps
68rps
77rps
77rps
68rps
62rps
76rps
76rps
68rps
56rps
---
---
---
---
90rps
90rps
85rps
73rps
85rps
85rps
76rps
68rps
81rps
81rps
73rps
62rps
---
---
---
---
A zone
B zone
C zone
AU* G45LRLA
AR* G45LMLA
AB* G45LRTA
AU* G54LRLA
D-F zone
A zone
B zone
C zone
D-F zone
A zone
B zone
C zone
AR* G45LHTA
AR* G54LHTA
D-F zone
( Table 1 : Compressor Frequency Range )
( Fig. 1 : Limit of Maximum Frequency based on Outdoor Temperature )
01-01
A zone
B zone
C zone
D-F zone
Fan speed mode
1. DESCRIPTION OF EACH CONTROL OPERATION
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

1-2. 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 3°C than a set temperature,
the compressor operation frequency will attain to maximum performance.
* 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 )
01-02
minimum
frequency maximum frequency
16rps 110rps
AU* G45LRLA
AR* G45LMLA
AB* G45LRTA
AR* G45LHTA
AU* G54LRLA
AR* G54LHTA

1-3. DRY OPERATION
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 )
01-03
Ts : Setting temperature
Ts+0.5°C
Ts+1.5°C
Operating
frequency
44rps
X zone
0rps
Y zone
Room Room
temperature temperature
X zone
Y zone
AU* G45LRLA
AR* G45LMLA
AB* G45LRTA
AR* G45LHTA
AU* G54LRLA
AR* G54LHTA
Compressor ON
OFF
Indoor fan
Setting air flow
OFF
10 30 60 180 60 180 60 10 30 (sec)
S-Lo
Compressor ON
OFF
Lo OFF
30 180 120 180 30 (sec)
Indoor fan ON
5 30 5
( Fig 3-2 : Indoor Fan Control for AR*G45/ 54LHTA )
( Fig 3-1 : Indoor Fan Control for AU*G45/ 54LRTA, AR*G45LMLA, AB*G45LRTA )
Indoor fan air flow *1
*1 : AU*G45LRLA ---> 470rpm, AU*G54LRLA ---> 480rpm
AB*G45LRTA ---> 680rpm, AR*G45LMLA ---> 670rpm,

1-4. AUTO CHANGEOVER OPERATION
01-04
When the air conditioner is set to the Auto mode by remote controller, operation starts in the optimum
mode from among the Heating, Cooling, Dry 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 1°C steps.
When operation starts, indoor fan and outdoor fan are operated for around 3 minutes.
Room temperature and outdoor temperature are sensed, and the operation mode is selected
in accordance with the table below. <Monitoring mode>
Cooling mode
25°C
Heating 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 Cooling or Dry mode was selected at and air flow mode is Auto, the air conditioner operates as follow.
The same operation as COOLING OPERATION AND DRY OPERATION of page 01-01 is performed.
When the room temperature has remained at set temperature -1.5°C, operation is automatically
switched to Dry mode.
If the room temperature reaches set temperature +2°C during Dry mode, operation returns to Cooling.
When Heating was selected at , the same operation as HEATING OPERATION of page
01-02 is performed.
When the compressor was stopped for 6 consecutive minutes by the temperature control function
after the Cooling(Auto:Dry) or Heating mode was selected at above, operation is switched
to Monitoring and the operation mode is selected again.
1
1
2
31
4
1
( Fig.4 : Outdoor temperature zone selection )
Cooling
(Autmatic dry)
Operation 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, Dry, 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, Dry, and Heating mode, indoor unit will be operated
according to the outdoor temperature as below.
Cooling
Cooling Dry
Dry
Compressor stop
When the room
temperature drops
When the room
temperature rises
Ts +2°C
Ts -0.5°C
Ts -1.5°C
Ts +1°C
Ts -1.5°C
Ts -2.5°C
( Fig.5 : Auto changeover : Cooling - Dry )
TR : Room temperature
Ts : Setting temperature
TR : Room temperature
Ts : Setting temperature
( Air flow mode : Auto )

01-05
START
Room temp.
Ts+2°C?
COOLING (AUTO:DRY)
OPERATION
HEATING OPERATION
YES
YES
NO
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
Operation mode of
outdoor unit : Cooling or Dry?
YES
NO
Operation mode of outdoor unit
: Heating?
YES
NO
YES
Outdoor temperature
25°C?
NO
YES
YES
NO
YES
YES

1-5. INDOOR FAN CONTROL
1. Fan speed
( Table 5 : Indoor Fan Speed )
2. FAN OPERATION
The airflow can be switched in 5 steps such as Auto, Quiet, Lo, Me, Hi, while the indoor fan only runs.
The High Static Pressure Duct type is 4 steps such as Auto, Lo, Me, Hi.
01-06
AU* G45LRLA
Operation
mode
Air flow
mode
Speed
(rpm)
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
*Soft Quiet
690
650
610
550
470
300
690
610
550
470
300
470
270
Heating
Cooling
Fan
Dry
S-Lo
AU* G54LRLA
Operation
mode
Air flow
mode
Speed
(rpm)
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
*Soft Quiet
720
680
630
570
480
300
720
630
570
480
300
480
270
Heating
Cooling
Fan
Dry
S-Lo
*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.
(Hi > Me, Me > Lo, Lo > Quiet, Quiet > Soft Quiet)
AB* G45LRTA
Operation
mode
Air flow
mode
Speed
(rpm)
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
*Soft Quiet
1200
1100
1000
830
680
500
1200
1000
830
680
500
680
250
Heating
Cooling
Fan
Dry
S-Lo
AR* G45LMLA
Operation
mode
Air flow
mode
Speed
(rpm)
Hi
Me+
Me
Lo
Quiet
Cool air prevention
Hi
Me
Lo
Quiet
*Soft Quiet
1300
---
1020
840
670
---
1310
1020
840
670
420
670
420
Heating
Cooling
Fan
Dry
S-Lo
*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.
(Hi > Me, Me > Lo, Lo > Quiet, Quiet > Soft Quiet)
AR* G45/ 54LHTA
(Normal static pressure: 100Pa)
Operation
mode
Air flow
mode
Speed
(rpm)
Hi
Me
Lo
1300
1150
1000
Heating
Cooling
Fan

4. HEATING OPERATION
Switch the airflow [Auto], and the indoor fan motor will run according to a room temperature,
as shown in Fig.7.
On the other hand, if switched in [Hi] ~ [Lo], the indoor motor will run at a constant airflow
of [Heat] operation modes Lo, Me, Hi, as shown in Table 5.
01-07
( Fig.7 : Airflow change - over ( Heating : Auto ) )
3. COOLING OPERATION
Switch the airflow [Auto], and the indoor fan motor will run according to a room temperature,
as shown in Fig.6.
On the other hand, if switched in [Hi] ~ [Lo], the indoor motor will run at a constant airflow of [Cool]
operation modes Lo, Me, Hi, as shown in Table 5.
( Fig.6 : 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
=
Hi mode
Me mode
Lo mode
*1
When the room
temperature rises
When the room
temperature drops
TR-Ts > -1°C
=
-2°C > TR-Ts
-1°C > TR-Ts > -2°C
=
TR-Ts > -1.5°C
=
-2.5°C > TR-Ts
-1.5°C > TR-Ts > -2.5°C
=
Lo mode
Me mode
Hi mode
*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.