B
B
T
T
E
E
A
A
S
S
e
e
r
r
i
i
e
e
s
s
U
U
s
s
e
e
r
r
M
M
a
a
n
n
u
u
a
a
l
l
O
O
p
p
t
t
i
i
c
c
a
a
l
l
A
A
m
m
p
p
l
l
i
i
f
f
i
i
e
e
r
r
R
R
e
e
v
v
.
.
0
0
0
0
5
5
P
P
a
a
g
g
e
e
6
6
o
o
f
f
1
1
5
5
IV. ERRORS AND MAINTENANCE
When the EDFA is operating normally, the front panel LEDs will all be green. If any of the
LEDs are red, it indicates an abnormal working state. In this case, please make sure that:
1. The key lock is on
2. The input power is in correct range
If the value of input power is less than default setting, the INPUTSTATUS LED will show
red. In this case the pump will turn off, and the EDFA will stop working.
3. Environmental temperature is suitable for EDFA working in its normal state
The working temperature for EDFA is from 0
C to 50
C. Too high environment temperature
will cause TEC current exceed its limit
，
thus OVERTEMP LED will show red to give a
warning. When pump temperature exceed 35
C, EDFA will shut off the pump automatically,
and the PUMP STATUS LED will also show red. Besides, EDFA can not work in too cold
condition as well.
Please contact us if the problem cannot be solved by considering the above facts. Do not
repair it by yourselves.
