Sharp AH-X08CR Service Manual page 18

AH/AY-X08CR
AH/AY-X10CR
AH/AY-X13CR
1-15 Auto Restart
When power failure occures, after power is
recovered, the unit will automatically restart in the
same setting which were active before the power
failure.
Operating mode (Cool, Heat, Dry)
Temperature adjustment (within 2˚C range)
automatic operation
Temperature setting
Fan setting
Air flow direction
Power ON/OFF
Automatic operation mode setting
Swing louver
Setting not memorized
Timer setting
Full power setting
1-16 Indoor/outdoor temperature display
Every time the Temperature check button is
pressed on the remote control, the display changes
in the order of indoor temperature
temperature
displayed on the temperature indicator on the main
unit to be referred to for energy saving.
(When the unit is not running, the display changes
between indoor temperature and no display.)Indoor
temperature is the temperature of the suction air
measured by the room thermistor, and outdoor
temperature is that measured by the outdoor
temperature thermistor. When indoor temperature
is displayed, the indoor LED on the main unit is lit,
and when outdoor temperature is displayed, the
outdoor LED is lit. For 90 seconds after the
operation starts, - - is displayed instead of the
actual outdoor temperature since it is still being
measured.Because of the effect of the exchanger,
the unit cannot confirm the exact indoor
temperature right after the operation is terminated.
Therefore, for one hour since the operation is
stopped, the indoor temperature immediately before
the operation is stopped is displayed. After over
one hour since it is stopped, the unit displays the
actual room temperature at that point.
1-17 Error diagnostic display
(a) Indoor unit
(1) When an error is detected, all relays are
turned off. At the same time, the details of the
error are displayed by flashing the number
corresponding to the type of the error. The
details can also be displayed by pressing down
the emergency operation switch for 5 seconds
or more in the state of operation stop.However,
if the operation is continued only in the serial
open state and the state remains unchanged
after that, the main relay is turned off in 8
minutes. In the serial short state, the error is
not displayed and the operation is continued. If
the unit stays in the same state, the main relay
is turned off in 8 minutes. Although the error is
not displayed, it is memorized and can be
displayed when it is recalled.
(2) If the operation is stopped and the emergency
operation button is pressed down for 5 seconds
or more, the self-diagnosis memory can be
recalled.
(3) Details of self-diagnosis (error mode) are
outdoor
no display. The temperature is
informed by the flashing number as well as the
lighting pattern of the operation lamp which
flashes with the timer lamp.(For details, refer to
Error diagnostic method.)
AU-X08CR/10CR/13CR are not provided with
the heating function.
2. OUTDOOR UNIT
2-1 Defrost operation (AE-X08CR/X10CR/13CR)
(1) Overview
Defrosting begins during heating if the conditions for
compressor operation time and outdoor heat
exchanger temperature are met.
When defrosting begins, the indoor and outdoor fans
stop. Defrosting stops when the temperature of the
outdoor heat exchanger goes above approximately
5˚C or defrosting time exceeds 13 minutes.
Defrost
mask time
Heating
begins
Defrosting
Max. 13 min.
2) Defrosting
If the compressor operation time is more than 20
minutes in the heating mode and the outdoor air
temperature and outdoor heat exchange temperature
satisfy the defrosting conditions, the defrosting
operation is started.
When the outdoor sheat-exchanger temperature
reaches approx. 5°C or above or when the defrosting
time exceeds 12 minutes, the defrosting operation is
quit.
More than
20 min.
Heating
operation
start
(3) During defrosting
When defrosting begins, the compressor stops.
Approximately 1 minutes later, the compressor
reactivates in the refrigeration cycle, and the outdoor
heat exchanger is defrosted.
Each mode is as follows:
The outdoor fan is stopped
The operating frequency is as shown in the table
below The indoor fan is stopped
(4) Defrost stop
When defrosting time exceeds 13 minutes When the
temperature of the outdoor heat exchanger rises
above approximately 5˚C Defrost stop is determined
by either of the above conditions, and the compressor
is stopped. At the same time, the outdoor fan go ON.
The compressor is reactivated in the heating cycle 1
minute after it was stopped, and normal control
resumes.
22
Defrost Defrost
mask time mask time
Defrosting
Max. 13 min.
More than More than
20 min. 20 min.
Defrosting Defrosting
Max. 12 min. Max. 12 min.