Minster IOI, Service Manual

Page: 33 / 92

The flow switch is connected between terminals “G” and
“A1”. Closing the flow switch contacts will cause 110
V.A.C. to be applied to the load from terminal “A2”. The
other lead from the load should be connected to the
press electrical common (press ground connection).
To Check The Static Switch:
If the flow switch is closing normally, but press clutch
cannot be engaged and lube fault light is illuminated,
check operation of the static switch.
1. With Stroking Selector in the SINGLE STROKE
mode and slide positioned at top of stroke, start the
lube pump motor. Then check for presence of 110
V.A.C. between terminal A1 and press ground. (See
Figure 6D.)
Results required: 110 V.A.C. should be present at
terminal A1.
2. Check for presence of 110 V.A.C. between terminal
A2 and press ground.
Results required: With the flow switch closed, 110
V.A.C. should be present at ter-
minal A2.
3. If no voltage appears between terminal A2 and
ground, simulate a closed flow switch by connecting
jumper wire between terminals G and A1.
Results required: 110 V.A.C. should now appear
at terminal A2 — if not, static
switch should be replaced.
CAUTION
DO NOT ALLOW JUMPER WIRE TO TOUCH PRESS
GROUND.
D - 8
!