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Sharp AY-A079E Service Manual page 13

Split system room air conditioners
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13. 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.
Table Y-4
Room temperature
Operation
at operation start
Mode
Above 28˚C
26˚C
28˚C
COOL
24˚C
26˚C
21˚C
24˚C
DRY
Below 21˚C
HEAT
14. 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.
a.COOL operation
Figure Y-13
b. HEAT operation
S t a t e s 1 & 7 : " H "
S t a t e s 2 & 6 : " M "
S t a t e s 3 & 5 : " L "
S t a t e s 4 : " L " / " U L " / O F F
4
3
2
1
P r e s e t t e m p e r a t u r e
Figure Y-14
Preset
Temperature
26˚C
25˚C
24˚C
Room temperature
at operation start
23˚C
H1
H2
H3
H4
5
6
R o o m
7
t e m p e r a t u r e
t r a n s i t i o n
15. Outputs in each operation mode
Mode
Compressor
C
ON
Cooling
O
O
OFF
Circulating
L
Normal
ON
OFF
H
E
Preheat
ON
A
Air Flow
T
Control
ON
ON Defrost
Cooling
D
ON
R
Dehumidiflying
Y
Circulating
OFF
OFF
FAN ONLY
16. Power on start
If the connecting wire "POWER ON" (JP8) 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".
(Refer to Figure L-2. Printed Wiring Board.)
17. AUTO RESTART
Power failure occurs during operation, the unit will
retart in the same operation mode as before after
power recovery.
(Refer to Figure L-2. Printed Wiring Board.)
18.Test mode
18-1 TEST 1 (For control circuit operation checking)
Make terminals 1 and 2 of connector CN4 short-
circuited and supply the power.
Hereby the timer's period becomes shortened.
In this test mode, the control times are shortend
as follows.
The operation LED flicker's period
in Test run
The protector timer
The defrost timer
Other controls; 1/60 (ex.; 3 min. to 3 sec.)
18-2 TEST 2 (For output of each operation checking)
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 pushing 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 Y-6 and Y-7.
13
Table Y-5
Outdoor
Indoor
Fan Motor
Fan Motor
ON
ON
OFF
ON
ON
ON
OFF
ON/UL/OFF
ON
UL/OFF ON
OFF
OFF
L/UL
UL/D
ON
OFF
D/OFF
OFF
ON
not
shortened
AY/AE-A079E
AY/AE-A099E
Valve
Coil
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
OFF

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