Protective Functions And Operations - Sharp AE-X4M30PU Service Manual

NO. Function
Compressor is stopped if a current approxi-
mately 25A or more flows in the power transistor
1 DC over current
module.
Lowers the operating frequency if the compres-
sor AC current exceeds set value(19.3). Stops
2 AC over current
the compressor if the current exceeds at mini-
mum frequency.
Lowers the operating frequency if the tempera-
Compressor over- ture of the compressor thermistor (TH1) rises
3 heat prevention above 226.4°F (108°C). Compressor is stopped
control if the thermistor stays above 226.4°F (108°C) for
2 minutes at minimum frequency.
Compressor is stopped if the compressor ther-
Compressor high
4 mistor is above 235.4°F (113°C) (Or when TH1
temperature error
shorts)
Lowers the operating frequency if the tempera-
Outdoor heat
ture of the outdoor heat exchanger rises above
exchanger over-
5 134.6°F(57°C) during cooling. Stops the com-
heat prevention
pressor if the temperature stays above 134.6°F
control
(57°C) for 2 minutes at minimum frequency
Compressor is stopped, if heat exchanger or
outdoor thermistor shorts. Close the expansion
6 Thermistor short
valve of the corresponding room, if some suction
thermistor shorts.
Compressor is stopped, if compressor or heat
exchanger or outdoor thermistor opens.
7 Thermistor open
Close the expansion valve of the corresponding
room, if some suction thermistor shorts or opens.
Compressor is stopped, if the operating frequen-
AC abnormal cur-
8 cy is above 70Hz and the compressor current is
rent
below 0.8A.
INDOOR
If open, while timer LED blinks, operation is con-
tinued. If short, operation is continued.
OUTDOOR
Loses the expansion valve of the corresponding
9 Serial signal error
room if the outdoor unit does not receive a serial
signal from one or more indoor unit for 30 sec-
onds.
Compressor is stopped, if the out-door unit does
not receive a serial signal from all indoor units.
Miswiring check Compressor is stopped, and miswiring check
10
error operation ends.
Lowers the operating frequency if the tempera-
Indoor heat
ture of any of indoor heat exchanger rises high
exchanger over-
temperature during heating.
11
heat prevention
Stops the compressor if the temperatures rays
control
high for 2 minutes at minimum frequency.
Power factor mod- When a power factor module error input is
12
ule error detected.
DC Compressor In the case that the feed back signal from the
13
rotation error compressor is not input or abnormal.
IPM overheat pre- Lowers the operating frequency if the tempera-
vention control. ture of IPM rises high temperature.
14
IPM high tempera- Stops the compressor if the temperatures rays
ture error high for 2 minutes at minimum frequency.

PROTECTIVE FUNCTIONS AND OPERATIONS

Description
Operation
Detection time Restart condition
During compressor Automatically restarts after
operation safety time (180 seconds)
During compressor Automatically restarts after
operation safety time (180 seconds)
During compressor Automatically restarts after
operation safety time (180 seconds)
Automatically restarts when
During compressor thermistor (TH1) temperature
operation f a l l s b e l o w 2 1 0 . 2 ° F ( 9 9 ° C )
(approximately 30 minutes)
During compressor Automatically restarts after
operation safety time (180 seconds)
When the room is
activated turns ON
Operation OFF
and the compres-
sor starts.
When the room
turns ON and the Operation OFF
compressor starts.
During compressor Automatically re-starts after
operation safety time.(180 sec.)
Automatically re-starts as soon
During operation as the serial communication
becomes possible.
During miswiring Miswiring check operation will
operation not re-start automatically.
During compressor Automatically re-starts after
operation safety time.(180 sec.)
During compressor Automatically re-starts after
operation safety time.(180 sec.)
During compressor Automatically re-starts after
operation safety time.(180 sec.)
During compressor Automatically restarts after
operation safety time.(180 sec.)
25
AE-X4M30PU
4 times Yes Yes
4 times Yes Yes
No limit No No
4 times Yes Yes
No limit No No
1 time Yes Yes
1 time Yes Yes
4 times Yes Yes
No limit Yes Yes
4 times Yes Yes
No limit No No
4 times Yes Yes
8 times Yes Yes
No limit No No