INNOVAIR DC INVERTER QUANTUM
SERVICE MANUAL
21
6. TROUBLE SHOOTING
2.2. When the unit has the following trouble and the compressor stops running, press the sleep button on
the remote controller 4 times in ten seconds and the 7-segment tube of the display board will show the error
code as the following. If two malfunctions happened at the same time, you must press the sleep button 4 times
again, and the LED will show the other error code.
Refer to the remote controller where the sleep key can set into 4 different combination ways (new design
remote controller), when using to check the error codes only takes effect for pressing the sleep key 10 times in
ten seconds instead of 4 times.
NOTE
: If the troubleshooting inquiry display by 7-segment tube, then the error code will be displayed,
otherwise only the LED of the display board will show.
Error
code
Running Timer Sleep Power Remark
：★
Light o Flash x OFF
1
2
3
4
Content
Remark The root cause is may be one of
the following
0
Normal
1
x
o
x
x
Failure of
temperature
sensor of
outdoor coil
a. The outdoor temperature
sensor is loose;
b. The outdoor temperature
sensor fails;
c. The indoor control board fails
2
×
Ο
★
×
Compressor
exhaust
temperature
sensor in
trouble
a. the compressor exhaust
temperature sensor connection is
loose;
b. the compressor exhaust
temperature sensor fails;
c. the outdoor control board fails
5
★
Ο
×
×
IPM module
protection
a. The IPM board fails;
b. The outdoor fan is broken;
c. The outdoor fan motor fails;
d. The outdoor fan has been
blocked ;
e. The condenser is dirty;
f. The outdoor unit has been
installed without standard.
6
★
Ο
×
★
AC voltage
higher or
lower
protection
a. the supply voltage is higher or
lower than normal;
b. the inner supply voltage of the
unit is higher or lower than normal