Sharp AE-XM24HR, Service Manual

Page: 19 / 50

3 – 2
8
9
10
Compressor is stopped, and
miswiring check operation ends.
AC
abnormal
current
Serial signal
error
Miswiring
check error
During
compressor
operation
During
operation
During
miswiring
operation
4 times Yes Yes
No limit Yes Yes
4 times Yes Yes
11 Indoor heat
exchanger
overheat
prevention
control
During
compressor
operation No limit No No
12 Power factor
module
(Active filter)
over voltage
error
During
compressor
operation
During
compressor
operation
4 times Yes Yes
16 In the case that the feed back signal
from the compressor is not input or
abnormal.
DC
Compressor
rotation
error
8 times Yes Yes
NO. Function Operation
Description Detection time Restarts condition Restarts
time In
door Out
door
Automatically re-
starts after safety
time (180 seconds)
Automatically re-
starts as soon as
the serial commu-
nication becomes
possible.
Miswiring check op-
eration will not re-
start automatically.
Automatically re-
starts after safety
time.(180 sec.)
17
During
compressor
operation
No limit No No
Automatically re-
starts after safety
time.(180 sec.)
Automatically re-
starts after safety
time.(180 sec.)
Automatically re-
starts after safety
time.(180 sec.)
Lowers the operating frequency if
the temperature of IPM rises high
temperature.
Stops the compressor if the tem-
perature srays high for 2 minute
S
at
minimum frequency.
INDOOR
If open, while timer LED blinks, op-
eration is continued.
If short, operation is continued.
OUTDOOR
Closes the expansion valve of the
corresponding room if the outdoor
unit does not receive a serial signal
from one or more indoor unit for 30
seconds.
Compressor is stopped, if the out-
door unit does not receive a serial
signal from all indoor units.
Lowers the operating frequency if
the temperature of any of indoor
heat exchanger rises high temper-
ature during heating.
Stops the compressor if the tem-
perature srays high for 2 minutes
at minimum frequency.
Compressor is stopped, if the oper-
ating frequency is above 70Hz and
the compressor current is below
0.8A.
IPM overheat
prevention
control.
IPM high
temperature
error
Compressor stops if DC voltage
is 450V or higher.
Power factor
module
(Active filter)
low voltage
error
Compressor stops if DC voltage
is 280V or lower.
During
compressor
operation
Automatically re
starts after safety
time.(180 sec.)
4 times Yes
Yes
13
Power factor
module
(Active filter)
clock error
When power source frequency
cannot be detemined (at startup).
or when power source clock can-
not be detected for 1 continuous
second (at startup).
At compressor
startup,when in
operation.
Compressor contin-
ues operation with-
out stopping. None
Yes
Yes
14
15 Outdoor unit
DC fan error
Operation stops if there is no
input of rotation pulse signal from
outdoor unit fan motor for 30 sec-
onds. When outdoor
unit fan is in
operation.
Operation OFF or ON Yes Yes Yes
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18 Thermal
fuse error
When thermal fuse in the outdoor
terminal board blew.
Operation OFF
1 time
Yes
Yes