Sharp AH-A129 Service Manual ▷ View online
AH-A129E
AU-A129E
AU-A129E
9
1. Temperature control characteristic
1-1
COOL operation
In the “COOL” mode, the thermostat circuit is
controlled by four thermostat lines (C1 thru C4).
In the “COOL” mode, the thermostat circuit is
controlled by four thermostat lines (C1 thru C4).
Figure H-3
2-2
DRY operation
On the switch on, the compressor always starts
to operate for 2 minutes with fan speed “D”
(slower than “UL”).
The microcomputer measures the room
temperature 2 minutes after this first compressor
operation. This room temperature is set as the
preset temperature automatically. The preset
temperature ranges from 18˚C to 32˚C. When
the room temperature is below 18˚C, the preset
temperature is set to 18˚C, and when the room
temperature is over 32˚C, the preset
temperature is set to 32˚C
Dry operation is divided into three zones
(Cooling zone, Dehumidifying zone and
Circulating zone) by thermostat lines (D1 to
D3), and the compressor and the fan motor
are controlled in each zone as shown in Table
H-1.
On the switch on, the compressor always starts
to operate for 2 minutes with fan speed “D”
(slower than “UL”).
The microcomputer measures the room
temperature 2 minutes after this first compressor
operation. This room temperature is set as the
preset temperature automatically. The preset
temperature ranges from 18˚C to 32˚C. When
the room temperature is below 18˚C, the preset
temperature is set to 18˚C, and when the room
temperature is over 32˚C, the preset
temperature is set to 32˚C
Dry operation is divided into three zones
(Cooling zone, Dehumidifying zone and
Circulating zone) by thermostat lines (D1 to
D3), and the compressor and the fan motor
are controlled in each zone as shown in Table
H-1.
FUNCTIONS
2. Operation modes
2-1
COOL operation
The compressor turns on or off, at the
thermostat lines C3 and C4. The outdoor fan
motor is also controlled with the compressor.
The compressor turns on or off, at the
thermostat lines C3 and C4. The outdoor fan
motor is also controlled with the compressor.
Figure H-1
1-2
DRY operation
In the “DRY” mode, the thermostat circuit is
controlled by three thermostat lines (D1 thru
D3).
In the “DRY” mode, the thermostat circuit is
controlled by three thermostat lines (D1 thru
D3).
Room temperature( C)
Preset temperature(˚C)
18
32
C1
C2
C3
C4
17.5
18.5
19.5
20.5
31.5
32.5
33.5
34.5
Room temperature( C)
Preset temperature(˚C)
18
32
D1
D2
D3
17.5
18.5
19.5
31.5
32.5
33.5
Figure H-2
Figure H-4
Room temperature
Preset temperature
Room
temperature
transition
temperature
transition
C3
C4
States 1 & 3 : Compressor ON
State 2 : Compressor OFF
State 2 : Compressor OFF
1
2
3
Room temperature
Preset temperature
Room
temperature
transition
temperature
transition
D3
D2
D1
States 1 & 5 : Cooling zone
States 2 & 4 : Dehumidifying zone
States 3 : Circulating zone
States 2 & 4 : Dehumidifying zone
States 3 : Circulating zone
3
4
5
1
2
AH-A129E
AU-A129E
AU-A129E
10
Table H-1
2-3
Fan only operation
The indoor fan motor always turns on.
The indoor fan motor always turns on.
3. Fan speed
Fan speeds are given by the indoor fan motor, “H”,
“M”, “L” and “UL”, which are available in the following
operation mode.
“M”, “L” and “UL”, which are available in the following
operation mode.
Table H-2
7. Timer
7-1 24-HOUR PROGRAMMABLE ON/OFF TIMER
ON-TIMER or OFF-TIMER can be independently
programmed. When the unit operates during one
hour after the OFF-time is set, thermostat setting
is automatically shifted (+1˚C in cool operation
and dry operation, -3˚C in heat operation, but,
16˚C set temperature at the lowest).
When the ON-timer is set in heat operation and
cool operation, operation starts before 0 to 30
minutes(depends on the room temperature) so
that preset temperature is obtaind at set time.
programmed. When the unit operates during one
hour after the OFF-time is set, thermostat setting
is automatically shifted (+1˚C in cool operation
and dry operation, -3˚C in heat operation, but,
16˚C set temperature at the lowest).
When the ON-timer is set in heat operation and
cool operation, operation starts before 0 to 30
minutes(depends on the room temperature) so
that preset temperature is obtaind at set time.
7-2 ONE-HOUR TIMER
When ONE-HOUR timer is set, the unit turns off
automatically after one hour. The one hour timer
operation has priority over other time operation,
such as the TIMER ON and TIMER OFF. If the
ONE-HOUR TIMER button is pressed again
during operation, the unit will operate additionally
for another one hour.
automatically after one hour. The one hour timer
operation has priority over other time operation,
such as the TIMER ON and TIMER OFF. If the
ONE-HOUR TIMER button is pressed again
during operation, the unit will operate additionally
for another one hour.
8. Automatic air conditioning
When automatic air conditioning is selected, the
operation mode and preset temperature are set
automatically according to the room temperature on
starting operation.
operation mode and preset temperature are set
automatically according to the room temperature on
starting operation.
Table H-3
9. Automatic fan speed
When the automatic fan speed is selected in cool or
heat operation, the fan speed is automatically changed
by the thermostat lines C1 to C3 in cool operation
and H1 to H4 in heat operation.
heat operation, the fan speed is automatically changed
by the thermostat lines C1 to C3 in cool operation
and H1 to H4 in heat operation.
Figure H-5
4. Anti-sweating
When the operation continues 30 minutes in cooling
zone or dehumidifying zone during dry operation or
in continuous compressor operation during cool
operation, the fan speed of indoor fan motor shifts
up, from “UL” to “L” or from “D” to “UL”.
zone or dehumidifying zone during dry operation or
in continuous compressor operation during cool
operation, the fan speed of indoor fan motor shifts
up, from “UL” to “L” or from “D” to “UL”.
5. Freeze preventive
When the indoor pipe temperature falls below -1˚C
during cool operation or dry operation, the compressor
is stopped.
during cool operation or dry operation, the compressor
is stopped.
6. Test run
If the “TEST RUN” button in the unit is pushed during
suspension of operation, cool test operation starts. At
this time, the fan speed is set to “AUTO”. If this button
is pushed during operation, the test operation starts
in current operation mode. The operation LED (red)
flickers during test run. During cool operation and
heat operation, the compressor is kept on but in dry
operation it is set in the dehumidifying zone. In fan
only mode the indoor fan motor runs continuously.
suspension of operation, cool test operation starts. At
this time, the fan speed is set to “AUTO”. If this button
is pushed during operation, the test operation starts
in current operation mode. The operation LED (red)
flickers during test run. During cool operation and
heat operation, the compressor is kept on but in dry
operation it is set in the dehumidifying zone. In fan
only mode the indoor fan motor runs continuously.
Compressor Fan speed
ON
"UL"
ON
"D"
OFF
Cooling zone
Dehumidifying zone
Circulating zone
"D" or OFF
COOL
FAN ONLY
M
M
L
L
UL
HIGH
FAN Switch
LOW
SOFT
UL
Operation
start
start
Preset
temp.
temp.
COOL
26˚C
25˚C
DRY
26˚C to 28˚C
Above 28˚C
Room temp. of
operation start
operation start
24˚C to 26˚C
Below 24˚C
24˚C
Room temp. at
operation start
operation start
Room temperature
Preset temperature
R o o m
t e m p e r a t u r e
t e m p e r a t u r e
t r a n s i t i o n
C3
C2
C1
States 1 & 5 :"M"
States 2 & 4 : "L"
States 2 & 4 : "L"
States 3 : "UL"
3
4
5
1
2
AH-A129E
AU-A129E
AU-A129E
11
10.Power on start
If the connecting wire "POWER ON" is cut on the
PWB ass’y, when the power is supplied by turning
on a circuit breaker, the air conditioner automatically
starts of operation in “AUTO” mode.
(Refer to Figure L-2. Printed Wiring Board.)
PWB ass’y, when the power is supplied by turning
on a circuit breaker, the air conditioner automatically
starts of operation in “AUTO” mode.
(Refer to Figure L-2. Printed Wiring Board.)
11.Auto restart
Power failure occurs during operation, the unit will
restart in the same operation mode as before after
power recovery.
(Refer to Figure L-2. Printed Wiring Board.)
restart in the same operation mode as before after
power recovery.
(Refer to Figure L-2. Printed Wiring Board.)
12.Outputs in each operation mode
Table H-4
13.Diagnosis procedure
When indoor fan motor is out of order or compressor lock occurs, the compressor, inddor fan motor, outdoor fan
motor, and louver are all stopped and the operation LED(red) turns on or off syncronously with the timimg of the
timer LED.
When the thermistor for room temperature or pipe temperature is open or short state, the operation LED turns on
or off syncronously with the timing of the timer LED by pushing continously for more than three seconds both
"TEST" button and "AUX." button.
motor, and louver are all stopped and the operation LED(red) turns on or off syncronously with the timimg of the
timer LED.
When the thermistor for room temperature or pipe temperature is open or short state, the operation LED turns on
or off syncronously with the timing of the timer LED by pushing continously for more than three seconds both
"TEST" button and "AUX." button.
Timing chart of Timer LED and Operation LED of DIAGNOSIS PROCEDURE.
When "OI" button the remote controller or "AUX." button in the unit is pushed, the unit is free from DIAGNOSIS
PROCEDURE.
When "OI" button the remote controller or "AUX." button in the unit is pushed, the unit is free from DIAGNOSIS
PROCEDURE.
Indoor
fan motor
fan motor
Comp.-lock
Thermistor
short state
short state
Thermistor
open state
open state
Timer
LED
LED
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Operation
LED
LED
Operation
LED
LED
Operation
LED
LED
Operation
LED
LED
1sec.
1sec.
4sec.
ON
OFF
ON
ON
OFF
ON
OFF
ON
ON
OFF
ON
ON
L/UL
UL/D
D/OFF
OFF
OFF
ON
Cooling
Dehumidifying
Circulating
DRY
Compressor
Outdoor
Fan motor
Indoor
Fan motor
FAN ONLY
COOL
Cooling
Circulating
AH-A129E
AU-A129E
AU-A129E
12
14.Test mode
14-1 TEST 1 (For control circuit operation checking)
Make terminals 1 and 2 of connector CN4 short-circuited and supply power.
The timer's periods become shorter i.e. a 3 minute cycle is carried out in 3 seconds, except for ;
The timer's periods become shorter i.e. a 3 minute cycle is carried out in 3 seconds, except for ;
The operation LED flicker's period
in Test run
The protector timer not shortened
The defrost timer
in Test run
The protector timer not shortened
The defrost timer
14-2 TEST 2 (For output of each operation checking)
Test mode is for checking output of each operation. Keep pushing both the buttons, "AUX." and "TEST
RUN", and supply the power, the system will go to the test 2 mode.
In this mode, the output of operation is switched by the "TEST RUN" button in the unit or the "OI" button in
the remote controller. Use the "AUX." button to back to step 1. Normal outputs are shown in Table H-5.
RUN", and supply the power, the system will go to the test 2 mode.
In this mode, the output of operation is switched by the "TEST RUN" button in the unit or the "OI" button in
the remote controller. Use the "AUX." button to back to step 1. Normal outputs are shown in Table H-5.
Table H-5
Step
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Output for outdoor unit
Lamps
RED
YELLOW
Indoor
Fan motor
Louver
OFF
(Back to step 1)
OFF
OPEN
ON
D
OFF
Flickering
M
OFF
L
CLOSE
D
OFF
UL
OFF
H
OFF
M
OFF
L
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
1
2
3
1
2
3
: 7˚C Room temp. 42˚C ON
: 7˚C (Room temp.) or (Room temp.) 42˚C OFF
: 7˚C (Room temp.) or (Room temp.) 42˚C OFF
: –2˚C Pipe temp. 42˚C ON
: –2˚C (Pipe temp.) or (Pipe temp.) 42˚C OFF
: –2˚C (Pipe temp.) or (Pipe temp.) 42˚C OFF
: ON in the case of Power on start
ON
ON
ON
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
ON
ON
OFF
ON
OFF
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
ON
ON
OFF
ON
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
ON
OFF
23
OFF
OFF
OFF
OFF
OFF
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