Sharp AE-X079E, Service Manual

Page: 21 / 48

21
AH-X079E/X099E
AY-X079E/X099E
FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES
Function
NO
Description Detection
time
Restart
condition
Restart
times
Indoor Outdoor
Operation Self diagnostic
display
1
2
3
4
5
6
Indoor fan
lock
Indoor fan
rpm error
Indoor
freezing
guard
Indoor
overheating
control
DC
overcurrent
AC
overcurrent
Compressor
lock
Stops operation if no revolution pulse
signal is input from the indoor fan motor for
one minute.
Stops operation if the revolution pulse
signal from the indoor fan indicates low
rpm (approximately 300 rpm or less).
Lowers the operating frequency if the
temperature of the indoor heat exchanger
goes below 5
°
C during cooling. Stops the
compressor if the temperature stays below
0
°
C for 4 minutes.
Lowers the operating frequency if the
temperature of the indoor heat exchanger
rises above the overheating temperature
during heating. Stops the compressor if the
temperature stays above the overheating
temperature for 1 minute at 35Hz or less.
Set values for overheating temperature
During normal operation: 46
°
C to 54
°
C
During full power operation: 49
°
C to
58
°
C
Stops the compressor if a current of
approximately 30A or more flows in the
power transistor module. Also stops the
compressor if the temperature of the
power transistor module is exceeds 105
°
C.
Lowers the operating frequency if the
compressor AC current exceeds
set valve( ).
Stops the compressor if the current
exceeds at 40Hz or less set valve( ).
Stops the compressor if the compressor
AC current exceeds 3A immediately after
activating the compressor (at 10 to 30Hz).
When indoor
fan is revolving
During cooling
and dry
During heating
During
compressor
operation
During
compressor
operation
Immediately
after
compressor
activation.
Operation OFF
Automatically
restarts when the
exchange
temperature rises
above the freezing
prevention
temperature (above
2
°
C)
Automatically
restarts when the
exchange
temperature goes
below the
overheating
temperature.
Automatically
restarts after safety
time (170 seconds)
Automatically
restarts after safety
time (170 seconds)
Automatically
restarts after safety
time (170 seconds)
No limit
No limit
No limit
4 times
4 times
4 times
Yes
No
No
Yes
Yes
Yes
No
No
No
Yes
Yes
Yes
Model
Set value (Normal)
During cooling
5.8A
During heating
6.3A
6.0A
6.5A
5.8A
6.0A
AU-X079E
AU-X099E
AE-X079E
AE-X099E
( )