13-9-653 Page 23
SHUTDOWN TROUBLESHOOTING GUIDE
All shutdowns are indicated on the keypad by the word
"SHUTDOWN"
on the top line of the display, and
one of the following messages on the lower line of the display. The red indicator in the Status area will be
steadily lit while the conditions exist, and will flash after the condition has been corrected. Perform
service as indicated. Press the [STOP/RESET] key to clear the shutdown.
Message
Action needed
CHANGE SEPARATOR
The differential pressure across the air / oil separator has risen to over
15 psid. Change the separator to ensure maximum compressor
performance.
CHECK CN7
All inputs at connector 7 of the controller are off. The most common
cause for this is that the connector plug has been pulled out. Plug the
connector back in firmly.
CHECK CN8
120 volts has been removed from ALL inputs to connector 8 of the
controller. The most common cause for this is that the connector plug
has been pulled out. Plug the connector back in firmly. This shutdown
may also occur during brief power interruptions.
CONTROLLER ERROR
The controller performs several internal diagnostic checks of its own
operation. Follow instructions on lower line, or replace if the controller
indicates
"REPAIR REQUIRED"
.
EMERGENCY STOP
The Emergency Stop button has been pressed. Pull it back out to its
normal position. If the button has not been pressed, check that the
contact block is firmly mounted in the right or left (not center) position of
the operator. Check for loose connections which would remove 120
volts from connector 8-8 of the controller.
EXTERNAL DEVICE
120 volts has been removed from terminal 7 of the terminal strip. This is
normally shipped jumpered directly to terminal 9, but the jumper may be
removed to add a field installed shutdown switch. Reset the external
switch.
FAN OVERLOAD
The motor overload relay for the fan motor, located within the electrical
control box, has tripped. This indicates high motor shaft load, low
voltage, or excessive imbalance in the incoming power (such as a blown
fuse). Disconnect and lock out power, open the box, and press the reset
button - it will click when reset. Measure motor amps, and take
corrective actions to get all currents within the motor nameplate rating. If
the overload relay has not tripped, check for the cause that 120 volts was
removed from connector 8-1 of the controller.
FAN STARTER
The controller has attempted to start the fan, but did not receive a return
signal from the starter's auxiliary contact. If the starter does not pick up
when attempting to start, check that connector 9 of the controller is
plugged in firmly, and check the starter coil. If the starter does pick up,
but this message appears, check that the auxiliary contact block is
properly installed on the starter and wired to connector 8, terminal 3.
FAN STRT CONTACT
The controller has attempted to turn off the fan, but is still receiving a
return signal from the starter's auxiliary contact. Check that the starter
operates freely and that the contact block is properly installed on the
starter.
Summary of Contents for AUTO SENTRY-ES+
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