Johnson Controls A419ABG-3C, Руководство по установке

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A419ABG-3 Electronic Temperature Control Installation Instructions 7
-40
-20
0
20
40
60
80
100
120
140
160
180
200
220
240
260
500 700 900 1100 1300 1500 1700 1900 2100
Resistance in Ohms
Temperature (°F)
-40
-20
0
20
40
60
80
100
120
Temperature (°C)
Figure 7: Temperature vs. Sensor Resistance
3. Check the A419 for proper operation.
Note: Perform Troubleshooting Steps 1 and 2 before
performing this step.
a. Disconnect the load from the output relay
terminals.
b. Ensure that the Touchpad Lock jumper is
installed, so that the touchpad is unlocked.
c. Reconnect the sensor leads and supply
power to the control.
d. Replace the cover.
e. Check the control settings for proper values.
f. Press and hold MENU until Setpoint
appears. (This takes about 2 seconds.)
g. Press the Up and Down (arrows) to change
the Setpoint temperature above and below
the sensor temperature until the relay
energizes and de-energizes as shown in
Figure 7.
Note: If the anti-short cycle delay has a set
delay-time value greater than 0 minutes when the
control is powered On, the relay does not energize
until the time delay has elapsed.
h. If the output relay does not perform as
indicated in Figure 7, replace the A419 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.
Fault Codes
If the LCD displays an alarm or fault code ( SF or EE ),
consult Table 5 for explanation.
Table 4: A419 Output Relay Operation in Different Operating Modes
Setpoint
Mode Operating
Mode Output Relay Is Energized (closing
the NO and COM contacts) at… Output Relay Is De-Energized (opening
the NO and COM contacts) at…
Cooling Setpoint plus differential Setpoint
Cutout
Heating Setpoint minus differential Setpoint
Cooling Setpoint Setpoint minus differential
Cut-in
Heating Setpoint Setpoint plus differential
Table 5: Fault Codes Defined
Fault Code Definition System Status Solution
SF
flashing alternately
with
OP
Open temperature
sensor or sensor wiring
Output functions according to
the selected sensor failure mode
(SF setting)
See Troubleshooting section.
Cycle power to reset the control.
SF
flashing alternately
with
SH
Shorted temperature
sensor or sensor wiring
Output functions according to
the selected sensor failure mode
(SF setting)
See Troubleshooting section.
Cycle power to reset the control.
EE
Program failure Output is off
Reset the control by pressing
MENU . If problems persist, replace
the control.