Function And Operation Of Protective Procedures - Sharp AH-X079E Service Manual

FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES

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