What to do if Johnson Controls A419 shows fault code EE?
If the Johnson Controls Temperature Controller displays fault code EE, it indicates a program failure. Try resetting the control by pressing MENU. If the problem continues, the control should be replaced.
What does it mean when Johnson Controls A419 shows fault code SF flashing alternately with SH?
If the Johnson Controls Temperature Controller displays fault code SF flashing alternately with SH, it means there is a shorted temperature sensor or sensor wiring. You should cycle power to reset the control.
What does it mean if Johnson Controls A419 Temperature Controller shows fault code SF flashing alternately with OP?
If the Johnson Controls Temperature Controller displays fault code SF flashing alternately with OP, this indicates an open temperature sensor or sensor wiring. Cycle the power to reset the control.
Why is the voltage reading not within the required range on my Johnson Controls Temperature Controller?
If the voltage reading is not within the required range for your Johnson Controls Temperature Controller, the issue might stem from problems with the power source or input power wires. Inspect the power source and input power wires to identify any issues.
What to do if the sensor resistance is wrong on Johnson Controls A419?
If the sensor's measured resistance value differs significantly from the expected value for that temperature on your Johnson Controls Temperature Controller, this could be due to a sensor wiring issue or a faulty sensor. First, check the sensor wiring. If the wiring is intact, consider replacing the sensor.
What to do if the output relay does not perform as indicated on Johnson Controls A419 Temperature Controller?
If the output relay of your Johnson Controls Temperature Controller does not perform as indicated, replace the A419 control.
What to do if Johnson Controls Temperature Controller shows program failure?
If your Johnson Controls Temperature Controller is experiencing a program failure, try resetting the control by pressing the Menu button. If the issue continues, it is recommended to replace the control.
What to do if Johnson Controls Temperature Controller output relay does not perform as indicated?
If the output relay on your Johnson Controls A419 Temperature Controller isn't working as expected, the suggested solution is to replace the A419 control.
Why Johnson Controls A419 Temperature Controller doesn't function properly?
If the Johnson Controls A419 Temperature Controller isn't functioning correctly, verify that the unit is properly wired, configured, and set up.
What to do if Johnson Controls Temperature Controller has an open temperature sensor or sensor wiring?
If there is an open temperature sensor or sensor wiring in your Johnson Controls Temperature Controller, cycle power to reset the control.
Single-stage electronic temperature controls with SPDT output relay, LCD display, and NEMA 1 or NEMA 4X enclosures.
Displays sensed temp, status, and custom icons for control and system status.
Allows precise temp diff setting (1-30F°/C°) for tighter control than electromechanical units.
Prevents rapid cycling by maintaining relay off-time, protecting equipment.
Shifts cut-in/cutout setpoints based on an external switch, like a time clock.
Offers NEMA 1 for surface/DIN rail and NEMA 4X for watertight, corrosion-resistant applications.
Enables easy setup/adjustment, with a jumper to lock touchpad and deter unauthorized changes.
Provides options for most refrigeration and HVAC control-voltage applications.
Controls are for normal operation; safety devices must be integrated to protect against failure or malfunction.
Used for refrigeration, HVAC equipment like freezers, coolers, boilers, and fans.
Details compliance with FCC Part 15 rules and Canadian Radio Interference Regulations.
Explains the front panel components (LCD, LED) and how control functions are described.
Details the Liquid Crystal Display (LCD), Output Relay Status Indicator LED, and touchpad buttons for operation.
Defines Cut-in (relay closes) and Cutout (relay opens) temperatures relative to the SPDT output relay.
Covers Setpoint (SP), Differential (dIF), and Anti-Short Cycle Delay (ASd) adjustment via the front panel.
Defines operation during sensor or sensor-wiring failures (continuous run or shutdown).
Covers changing display units (F°/C°) and applying temperature offset via binary input.
Explains how jumpers set Touchpad Lock, Heating/Cooling mode, and Setpoint mode (cut-in vs. cutout).
Details the four operating modes: Cooling/Cut-in, Cooling/Cutout, Heating/Cut-in, and Heating/Cutout.
Describes NEMA 1 and NEMA 4X enclosures and provides guidance on mounting.
Emphasizes electrical safety, wire types, and provides typical wiring diagrams for different voltage models.
Guidelines for sensor lead length, resistance, interference, and wiring for the Temperature Offset function.
Details jumper placement on P4 and P5 to configure mode, setpoint type, and touchpad lock.
Procedure to convert temperature display between Fahrenheit and Celsius units.
Step-by-step guide for adjusting the temperature setpoint using the control's buttons.
Instructions for adjusting Differential (dIF), Anti-short Cycle Delay (ASd), Temperature Offset (OFS), and Sensor Failure (SF).
Steps to verify installation, wiring, and control operation for three complete cycles before finalizing.
Covers checking voltage, sensor operation (resistance vs. temp), and output relay function based on settings.
Lists fault codes (SF, EE) displayed on the LCD and provides corresponding system status and solutions.
Advises against self-repair; provides guidance on contacting distributors and ordering information.
Details specifications including range, voltage, power, electrical ratings, and environmental conditions.
General| Control Type | On/Off |
|---|---|
| Supply Voltage | 120/208/240 VAC |
| Switch Type | SPDT |
| Output Type | Relay |
| Accuracy | ±1°F (±0.5°C) |
| Display | LED |
| Enclosure Rating | NEMA 1 |
| Differential | Adjustable |
| Sensor Type | Thermistor |
| Mounting | Surface |
| Output Relay Rating | 16A (Resistive), 1/2 HP (Inductive) |
To Next Page
