Function And Operation Of Protective Procedures - Sharp AH-S22AW2 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 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.
4 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( ).
5 Compressor Stops the compressor if the compressor
lock AC current exceeds 3A immediately after
activating the compressor (at 10 to 30Hz).
6 Compressor Lowers the operating frequency if the
overheating temperature of the compressor chamber
control thermistor (TH1) rises above 105°C.
Stops the compressor if the thermistor
stays above 105°C for 1 minutes at 35Hz
or less.
7 Compressor Stops the compressor if the compressor
high chamber thermistor is above 114°C.
temperature (Or when TH1 shorts)
error
( )
Model
Set value (Normal)
AU-S22AW2
AU-S25AW2
Operation
Description
6.2A
6.5A
Detection Restart
time condition
When indoor Operation OFF
fan is revolving
During cooling Automatically
and dry of full restarts when the
power exchange
operation. temperature rises
above the freezing
prevention
temperature (above
2°C)
Automatically
restarts after safety
During time (170 seconds)
compressor
operation
Automatically
restarts after safety
During time (170 seconds)
compressor
operation
Automatically
restarts after safety
Immediately time (170 seconds
after
compressor
activation. Automatically
restarts after safety
During time (170 seconds)
compressor
operation
Automatically
restarts when
During thermistor (TH1)
operation temperature falls
below 100°C
(approximately 30
minutes)
19
AH-S22AW2
AH-S25AW2
Self diagnostic
display
Restart Indoor Outdoor
times
No limit Yes No
No limit No No
4 times Yes Yes
4 times Yes Yes
4 times Yes Yes
No limit No No
4 times Yes Yes