Hisense AS-07UR4SYDDB15, Service Manual, Page: 56 / 59

82
24
Chip in outdoor
board in
trouble
a. Using the wrong drive board;
b.Using the wrong compressor.
26
Overheated
outdoor radiator
a.
Radiator sensor fails
b.
Detection circuit of the
sensor on the control panel fails
27
Protection
against too high
system
pressure
a. The pressure switch fails
b. The pressure detection switch
on the control panel fails
c. The measured value of
system pressure exceeds the
limit
33
★
Ο Ο
The failure for
temperature
sensor of
indoor room
d.
The indoor room temperature
sensor loose;
e.
The indoor room temperature
sensor is failure;
f.
The indoor control board is
failure.
34
x
Ο Ο
The failure for
temperature
sensor of
indoor coil
temperature
d.
The indoor coil temperature
sensor loose;
e.
The indoor coil temperature
sensor is failure;
f.
The indoor control board is
failure.
36
Ο
★
Ο
Communicatio
n failure
between the
indoor unit and
outdoor unit
a.
the communication cable connect
loose;
b.
the communication cable is failure;
c.
the connection between the filter
board and the outdoor control board
is incorrect or loose;
d.
the connection between the filter
board and the terminal is incorrect or
loose;
e.
the indoor control board is failure;
f.
the PFC board is failure;
g.
the power board is failure;
h.
the outdoor control board is failure.
38
Ο Ο
x
Indoor
EEPROM
failure
c.
The EEPROM chip loose;
d.
The indoor control board is
failure
39
Ο Ο
★
Indoor fan
motor run
abnormally
b.
There are something block the
indoor fan motor;
b. The fan motor cord connect loose;
c. The fan motor is failure;
d. The indoor control board is failure
41
x x ★
The failure for
Indoor
grounding
The indoor control board is failure