Foley United ACCU-Pro 670, Assembly And Service Manual

Page: 24 / 50

24
TROUBLESHOOTING ELECTRICAL MAIN POWER
--POSSIBLE CAUSE-- --REMEDY-- --REASON-- --PROBLEM--
A--Grinding Motor Switch (GMS)
is not on.
B--Main power source breaker
is tripped, power source switch
is off, or grinder is not plugged
in.
C--System Start Switch (SSS) is
not on.
D--Guard door is not closed
E--Insufficient Line Voltage to
power the low voltage relay.
F--Voltage not going to mag-
netic starter.
Solenoid in magnetic starter
does not pull in.
Solenoid pulls in, but no voltage
out of magnetic starter.
G--Voltage is not going through
interlock relay.
Turn switch on.
Reset breaker, turn switch on
and plug machine in.
Press System Start Switch.
Close the guard door.
Check status of the low voltage
relay inside the control box.
With the volt meter set on AC
voltage, check L1 (black) to L2
(white) for lines coming in of 115
volt. Check power source fuse.
Check for loose connections on
magnetic starter. Check for 115
Volts AC across starter coil A1
to A2. NOTE: Contactor clicks
when engaging.
Check for 120 volt AC between
terminals T1 (black) and T3
(white). T1 and T3 are main
power out lines. NOTE: T2 is
jumpered to L3. Check reset
overload on starter by pushing
down on blue button. Check
terminal connections between
contactor and overload relay. If
no voltage on output, replace
magnetic starter.
Check for 115 VAC at incoming
side of relay. Terminals 4 & 8.
Check for 115 VAC at output
side of relay terminals 2 & 6.
Checks must be done with
guard door close, Relay Coil
engaged.
Grinding motor
do not function
(no apparent
power to ma-
chine).
Because the guard door is
interlocked to the grinding
motor, the grinding motor
will not operate if door is
open.
If "norm" light is lit, relay is
satisfied and line voltage is
acceptable.
If "trip" light is lit, line voltage
to the grinder is inadequate
and must be corrected.
AC voltage power source
required.
These wires control
magnetic starter voltage for
main power.
Overload may have been
tripped when moving
machine or machine
grinding head motor
overload or electrical power
surge.
--ELECTRICAL--