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Easy-Start ES Instruction Manual
Troubleshooting
SECTION 5
5-3
Troubleshooting Guide
UNDER VOLT LED
Check voltages at the line terminals.
The under-voltage circuit will activate if the line
voltage is below 75% of nominal line voltage.
(The under-voltage LED will not activate if the line
voltage is disconnected from the starter, this is
not treated as an under-voltage case.)
If the correct voltages are measured at the line
terminals, check to see if the proper voltage plug
is installed in the logic board. An example would
be, if the 460V voltage plug is installed in the
logic board and you are operating from a 230V
supply line. Make sure the ÒHIÓ ÒLOÓ jumper is
properly installed on the logic board. (See Table
3-13.)
Again, as stated in a previous paragraph, the
under voltage LED may also come on if there is a
phase loss.
If all voltages read properly, and none of the
LED's are on, you are now ready to give the start
command to the motor.
The
RUN
LED should come on, and stay on,
whenever you give the start command. If it does
not, check the 120 VAC control voltage at the
terminal strip TB1. Read 120 VAC between TB1-
12 and TB1-4 while holding the start button or
switch, in the on position.
Visually check to see if the relay (K2) on the logic
board is activating.
If the run LED does not come on, check the start,
stop, reset, 120 VAC control circuit and all
customer interlocks.
If the
RUN
LED comes on and the motor does
not rotate; check the following:
-
Measure the voltage at test point TP-6 on the
logic board; it should be greater than 5 VDC.
-
Check DIP switch DS1 and DS2 settings
against motor FLA. Remember, DS2 is only
activated if there is a connection made
between TB1-2 and TB1-8 on the logic board.
-
Curr Lim
LED - The motor may be in a
current limit; check the Curr Lim adjustment.
Turn Curr Limit adjust CW. If the motor does
not start, change the logic board.
When giving a start command, if a fault trip LED
comes on, check the following:
-
Curr Trip
LED May indicate a wrong DIP
switch DS1 and DS2 setting, or a short at the
load or motor.
-
Curr Unbal
LED May indicate one of the
following:
a. Open gate-cathode lead connection,
check the wires and also see if
connectors are seated properly.
b. Open motor lead.
c. Open SCR gate (refer to SCR diagnostic
tests Section 5-D.)
d. Shorted SCR (refer to SCR diagnostic
tests.)
e. Open CT, or open lead in connector J-1.
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