Sharp AH-S22AW2, Service Manual

Page: 19 / 40

19
AH-S22AW2
AH-S25AW2
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
7
Indoor fan
lock
Indoor fan
rpm error
Indoor
freezing
guard
DC
overcurrent
AC
overcurrent
Compressor
lock
Compressor
overheating
control
Compressor
high
temperature
error
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.
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).
Lowers the operating frequency if the
temperature of the compressor chamber
thermistor (TH1) rises above 105
°
C.
Stops the compressor if the thermistor
stays above 105
°
C for 1 minutes at 35Hz
or less.
Stops the compressor if the compressor
chamber thermistor is above 114
°
C.
(Or when TH1 shorts)
When indoor
fan is revolving
During cooling
and dry of full
power
operation.
During
compressor
operation
During
compressor
operation
Immediately
after
compressor
activation.
During
compressor
operation
During
operation
Operation OFF
Automatically
restarts when the
exchange
temperature rises
above the freezing
prevention
temperature (above
2
°
C)
Automatically
restarts after safety
time (170 seconds)
Automatically
restarts after safety
time (170 seconds)
Automatically
restarts after safety
time (170 seconds
Automatically
restarts after safety
time (170 seconds)
Automatically
restarts when
thermistor (TH1)
temperature falls
below 100
°
C
(approximately 30
minutes)
No limit
No limit
4 times
4 times
4 times
No limit
4 times
Yes
No
Yes
Yes
Yes
No
Yes
No
No
Yes
Yes
Yes
No
Yes
Model
Set value (Normal)
6.2A
6.5A
AU-S22AW2
AU-S25AW2
( )