BU
50
SW / BU
75
SW / BU
100
SW / BU
150
SW
37
1
2
3
4
5
6
7
8
9
10
■
Precautions when replacing the fan
■
Fan replacement procedure
1.
Use a screwdriver to loosen (turn counter-clockwise) and remove the 3 cooling fan screws on the back
of the unit.
➀
Pull the cooling fan toward you to remove it.
➁
The fan can be replaced while the unit is in operation (power supply is being output) or while the
unit is stopped (power supply output is stopped). Choose whichever replacement method is more
convenient.
* If the fan stops or is removed while the unit is in operation, the “EF” lamp blinks, the beep sounds con-
tinuously, and output is supplied through bypass operation.
In this state, if an input power supply error occurs due to a power failure or other reason, the unit stops
without entering Battery Mode.
* Do not replace the fan while in Battery Mode.
The unit will stop.
Do not insert your hand or metal objects into the fan recess.
•
Doing so may cause electric shock or short-circuit.
Do not put your fi ngers into the fan.
•
The fan spins when the AC input plug is connected to a wall outlet (commercial power).
•
Doing so may result in injury.
Warning
Caution
In addition to the fan on the back of the BU150SW, there is an internal fan.
When ‘ ’ blinks on the status indicator, the internal fan needs to be replaced.
For details on replacing the internal fan, contact the Electronic Systems & Equipment repair center.
When this product is used in compliance with UL standards or CE marking, do
not replace the fan.
●
Fan replacement does not comply with UL standards or CE marking.
Fan recess
Fan
Loosen the
3 screws.
6-3
Replacing the fan
The fan in the unit has an expected lifespan of approximately 5 years.
Replace it when the Error Lamp is lit and the fan is stopped.