Komatsu 930E-2 Shop Manual page 715

POSSIBLE CAUSES
TROUBLE: Timer Turns On At Intervals Two (2) To Ten (10) Times More Often Than Set Time Interval
Electrical noise is being introduced into the power
supply to the timer overcoming suppressor capacitor
causing uncontrolled turn-on of its output relay.
TROUBLE: Timer Turns On At Intervals Faster Than Allowable Tolerances Of Settings
Timer out of adjustment or damaged component.
P03018 4/00
SUGGESTED CORRECTIVE ACTION
IMPORTANT: In some instances, electrical noise
may be generated into vehicle electrical system
which may cause timer to turn on at random inter-
vals, independent of timer setting.
If this occurs, a 250 to 1,000 MFD capacitor rated
150 to 350 VDC should be added across BAT (+)
and BAT (-) terminals to suppress this noise and
improve timer performance.
Refer to "Timer Adjustment and re-adjust timer or
replace timer.
Automatic Lubrication System P3- 15