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Table 15, A419 Output Relay Operation
Setpoint
Note: When the relay is energized, the N.O. contacts are closed and the LED is illuminated.
Fault Codes
If the LCD displays an alarm or fault code (SF or EE), consult Table 6 for explanation.
Table 6, Fault Codes Defined
SF flashing
SF flashing
EE
IOM 1062
e. Check the control settings for proper values.
f. Press and hold the Menu button until Setpoint appears (occurs in about 2 seconds).
g. Use the Up and Down buttons to change the Setpoint temperature above and below
the current sensor temperature until the output relay energizes and de-energizes as
Table 15
shown in
Note: If the anti-short cycle delay has a time greater than 0 minutes, the relay will
not energize until the timed delay has elapsed.
h. If the output relay does not perform as indicated in
control.
i.
If proper operation of the A419 control is verified, reconnect the load and consult
the equipment manufacturer's instructions for troubleshooting the controlled
equipment.
Operating
Mode
Mode
Cooling
Cut-out
Heating
Cooling
Cut-in
Heating
Fault Code
Definition
Open temperature
alternately
sensor or sensor
with Op
wiring
Shorted
temperature
alternately
sensor or sensor
with SH
wiring
Program failure
Direct Drive Fluid Coolers
.
Output Relay Energized at... Output Relay De-energized at...
Setpoint plus differential
Setpoint minus differential
Setpoint
Setpoint
System Status
Output functions
according to the selected
sensor failure mode (SF
setting)
Output functions
according to the selected
sensor failure mode (SF
setting)
Output is off
Table 15
, replace the A419
Setpoint
Setpoint
Setpoint minus
differential
Setpoint plus
differential
Solution
See Troubleshooting
section. Cycle power to
reset the control.
See Troubleshooting
section. Cycle power to
reset the control.
Reset the control by
pressing the Menu button.
If problems persist,
replace the control.
29
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