7
7
.
.
T
T
R
R
O
O
U
U
B
B
L
L
E
E
S
S
H
H
O
O
O
O
T
T
I
I
N
N
G
G
ON/OFF UNITARY AIR CONDITIONER TECHNICAL& SERVICE MANUAL V5.0
91
3.Fault code display ( Driver Board )
The lamp of driver board flash shows failure occur.
Or, fault code can be check on digital tube board .