Melec GD-5410 Instruction Manual page 10

●When performing maintenance and checking:
 I
Only qualified personnel are allowed to
perform maintenance and checking.
Failure to do so may cause electric shock.
 I
Do not contact with a wet hand.
Doing so may cause electric shock.
 I
The marks,  and 
indicate terminals on which power voltage
is applied.
Do not touch such terminals while
inputting power and while POWER LED is on.
Doing so may cause electric shock.
 I
Do not replace fuse.
Do not disassemble, repair or modify.
Doing so may cause electric shock, injury
or fire.
-10-
Instructions Manual
, on the front panel