ADVISORY TROUBLESHOOTING GUIDE (Continued)
Message
Action Needed
HIGH TEMP OPER
The temperature was greater than 210° F (99° C) at the airend discharge
or the separator. Ensure that the compressor receives adequate cooling
air or water, and that the coolers are not plugged.
LOW AMB TEMP
The temperature was less than 40° F (4° C) at the airend discharge or the
separator, Ensure that the compressor is located in a room kept above
freezing.
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 perfor-
mance.
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.
FAN OVERLOAD
FAN START ERROR
(while stopped)
CHECK CN8
120 volts has been removed from ALL inputs to connector 8 of the control-
ler. The most common cause for this is that the connector plug has been
pulled out, Plug the connector back in firmly.
EMERGENCY STOP
The Emergency Stop button has been pressed. Pull it back out to its nor-
mal position. If the button has not been pressed, check that the contact
block is firmly mounted inthe right or left (not center) position of the opera-
tor. Check for loose connections which would remove 120 volts from con-
nector 8-8 of the controller.
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
- itwill click when reset. Measure motor amps, and take corrective actions
to get all currents within the motor nameplate rating. If overload relay has
not tripped, check for the cause that 120 volts was removed from connec-
tor 8-1 of the controller.
The controller has attempted to turnoff 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.
FAN START ERROR
(while running)
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 infirmly, 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.
13-9/10-641 Page 62
To Next Page
Loading...
Need help?
General
