Komatsu PC1250-11 Original Instructions Manual page 316

TROUBLES AND ACTIONS
Problem
An error code is displayed on the
monitor.
Alarm buzzer sounds.
Engine suddenly loses power.
It is in derate mode.
IF MACHINE MONITOR SHOWS WARNING DISPLAY
When the action level display (1) or caution lamp (2) is shown
on the display of the machine monitor, press the switch F5 to
display the Current Abnormality and check the details and rem-
edy.
• When "DXA0KA", or "DXA0KB" is on the Current Abnor-
mality screen, turning the pump secondary drive switch to
upper (emergency) position enables operations temporari-
ly.
After that, immediately ask your Komatsu distributor for the
inspection and repair.
• Even though the machine has not run out of fuel, if
"CA2249" or "CA559" is displayed on the Current Abnor-
mality screen, replace both fuel main filter and fuel prefilter
immediately. For replacing, see "METHOD FOR REPLAC-
ING FUEL PREFILTER CARTRIDGE" and "METHOD FOR
REPLACING FUEL MAIN FILTER CARTRIDGE".
If "CA2249" or "CA559" is not cleared even after the replacement, ask your Komatsu distributor for the in-
spection and repair immediately, even though the machine can perform normal operation.
Telephone number for the point of contact if an error occurs
When an error screen is displayed on the monitor, press the
switch F5 to display the Current Abnormality screen, and tele-
phone number (3) for the point of contact is displayed in the
message column at the bottom of the screen.
REMARK
If no point of contact telephone number is registered, no tele-
phone number is displayed.
Ask your Komatsu distributor for the telephone number regis-
tration if necessary.
3-250
Main causes
Contact your Komatsu distributor.
OPERATION
Remedy