INNOVAIR DC INVERTER QUANTUM
SERVICE MANUAL
17
6. TROUBLE SHOOTING
1. Indication on the outdoor unit:
When the unit has the following trouble and the compressor stops running, the LED of
outdoor control board will show the error sequence automatically:
NOTE:
★：
LIGHT O
：
FLASH
×
：
OFF
Error
code
Outdoor Failure
Description
LED1 LED2 LED3
The cause may be one of the following
Mark description: the lights flash every second for the following faults
Normal
×
×
×
Outdoor coil
temperature
sensor in trouble
★
×
★
a.
the outdoor coil sensor connect is loose;
b.
the outdoor coil temperature sensor fails;
c.
the outdoor control board fails
Compressor
exhaust
temperature
sensor in trouble
★
×
×
a.
the compressor exhaust temperature sensor
connect is loose;
b.
the compressor exhaust temperature sensor
fails;
c.
the outdoor control board fails
Communication
failure between
the indoor unit
and outdoor unit
×
×
O
a.
the communication cable connect 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.
Current overload
protection
★
O
×
a.
the fan motor runs abnormally;
b.
the condenser and evaporator is dirty;
c.
the air inlet and outlet is abnormal
Maximum current
protection
★
O
★
a.
the outdoor control board is short circuit;
b.
the drive board is short circuit;
c.
the other components is short circuit
Communication
trouble between
outdoor unit and
driver
×
★
★
a.
the connection wires connect loose
b.
the outdoor board or drive board fails;
