6. TROUBLE SHOOTING
7
★
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.
8
★
Ο
★
★
Current
overload
protection
a. the fan motor runs
abnormally;
b. the condenser and
evaporator are dirty;
c. the air inlet and outlet is
abnormal
9
×
×
Ο
×
Maximum
current
protection
a. the outdoor control board has
short circuit;
b. the drive board has short
circuit;
c. the other components have
short circuit
10
×
×
Ο
★
Communication
trouble
between
outdoor unit
and driver
a. the connection wires connect
loose
b. the outdoor board or drive
board fails;
11
×
★
Ο
×
Outdoor
EEPROM in
trouble
a. the EEPROM chip is loose;
b. the EEPROM chip inserted
with opposite direction;
c. the EEPROM chip fails
12
×
★
Ο
★
Outdoor
ambient
temperature
too low
protection
Outdoor ambient temperature
too low