24
6. TROUBLE SHOOTING
INNOVAIR DC INVVERTER QUANTUM
SERVICE MANUAL
w w w . i n n o v a i r . c o m
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;
c. The fan motor fails;
d. The indoor control board fails
41
★
★
o
★
Detecting
failures by
zero-crossing
The indoor control board fails
The failure is detected when the room temperature sensor broken or shorted over 5 sec.
The failure is detected when the temperature sensor of heater exchange is broken or shorted over 5 sec.
The failure is detected when each setting data is not a match after the EEPPOM self-check two times.
The failure occurs when the grounding signal is not detected after the appliance is powered ON.
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