Komatsu PC1250-11, Original Instructions Manual

Page: 137 / 452

REMARK
• The fan speed is in proportion to the engine speed.
When the engine speed is at low idle, the fan speed
decreases, as well. To increase the fan speed, oper-
ate the fuel control dial to increase the engine speed.
• When reversing the fan rotation while the engine is
stopped, wait until this screen appears, and then turn
the starting switch to “START” position. This screen
does not change until the engine is started. To cancel
it, turn the starting switch to “OFF” position.
• If the aftertreatment devices regeneration pilot lamp or
the KDPF soot accumulation caution lamp lights up
while the fan is rotating in reverse, return the fan to
the normal rotation immediately and take necessary
actions until the aftertreatment devices regeneration
pilot lamp or the KDPF soot accumulation caution
lamp goes out.
After the lamps go out, you can reverse the fan rota-
tion.
6.
When the fan rotates in reverse, the screen shown in the
figure is displayed automatically.
This screen is kept displayed while the fan is rotating in re-
verse.
NOTICE
If the fan rotation direction cannot be reversed, the
caution lamp lights up.
When the caution lamp lights up, follow the instruc-
tions.
7.
To return the fan rotation direction from reverse to normal,
press the switch F5 on the screen shown in the figure.
OPERATION EXPLANATION OF COMPONENTS
3-71