6. TROUBLE SHOOTING
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
o
x
x
★
Failure of
temperature
sensor of
indoor room
a. The indoor room temperature
sensor is loose;
b. The indoor room temperature
sensor fails;
c. The indoor control board fails.
34
o
x
★
x
Failure of
temperature
sensor of
indoor coil
temperature
a. The indoor coil temperature
sensor is loose;
b. The indoor coil temperature
sensor fails;
c. The indoor control board fails.
36
Ο
★
×
★
Communication
failure between
the indoor unit
and outdoor
unit
a. the communication cable
connection is loose;
b. the communication cable
fails;
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 fails;
f. the PFC board fails;
g. the power board fails;
h. the outdoor control board
fails.
38
o
★
★
★
Indoor
EEPROM
failure
a. The EEPROM chip is loose;
b. The indoor control board fails
39
o
x
★
★
Indoor fan
motor run
abnormally
a. There are something blocking
the indoor fan motor;
b. The fan motor cord
connection is loose;