3110 Tap lubrication low.
Sheet 5 Plug 3 Pin-S
This fault is caused by a loss of a 24 volt signal from the tap-lubrication float switch through terminal 516 in the power distribution panel to a 'Digital Input' board in the control.
a) Visually check the tap-lubrication oil level in the sight-glass on the side of the reservoir at the rear of the machine. Replenish if necessary.
b) If the same error code persists check for 24 volts at terminals 500 and 516 with a voltmeter (TB1 in the power distribution panel). If there is no 24 volts, indicator-fuse 3 in the PDP may be faulty.
c) If there is 24 volts at terminal 500 but not at terminal 516 then the float switch is faulty and repair or replacement is necessary.
d) If there is 24 volts at both 500 and 516 then the fault lies from terminal 516 through to Plug 3, Pin-S and the 'Digital Input Board' in the control.
e) Switch-off the control and transpose the 'DI' boards situated in the lower rack to the left. Power-up the machine. If the fault disappears, or a different, unrelated error code shows-up, then the 'DI' board is faulty and a replacement is required.
f) If the same error code persists switch-off the machine, remove plug 3 and check the continuity from pin-S to terminal 516. There may be a spare wire in the cable loom to utilize if wire 516 appears to be broken.
g) If the wiring is O.K. the fault may be with the 'Watchdog' board (WD 50x) in the control or corruption of the memory. If another control is available the 'Watchdog' boards can be exchanged to test. If the memory is to be reloaded remember to punch-out programme and tool information first (although an up to date back-up tape should always be held).