TK Fresh Plus Option Alarm Codes

Code 122 - O2 Sensor Calibration Error (PTI Only) (if equipped).

Parent topic: TK Fresh Plus System

System Operation Verification

If the system appears not to be operating properly, it is best to verify that the controller can recognize if the TK Fresh Plus option is installed. Use the Auto Configuration function found in the Config menu. Select setting to ON. Allow the configuration steps to complete. The last step of the configuration will be TK Fresh. Watch the Display closely during this test. When to TK Fresh door opens and closes, the TK Fresh option will be set. The controller will now test communications to the gas analyzer. When the gas analyzer is found, the option will change to TK Fresh Plus.

    Note

  1. Upgrade the controller software to the latest released version. Auto Configuration will be automatically initiated upon successful completion of a software flashload.

  2. If only the TK Fresh option is found, then there is a communication problem with the gas analyzer.

  3. If only Gas Analyzer is found, there is a problem with the operation of the damper motor.

To select Auto Configuration:

  1. Enter Config menu, select Options, then Auto Configuration.

  2. Turn Auto Configuration ON by using UP key.

  3. Press and hold Enter key to Accept.

Once the Auto Configuration is complete, and the TK Fresh Plus system has been found and configured into controller memory, enter the desired settings. If the damper motor or the gas analyzer is not found during the Auto Configuration, use the unit Schematic and Wiring Diagrams to verify the connections, supply voltages, and communication wiring to the two components. Also verify that the TK Fresh Plus Expansion Module is firmly attached to the back of the controller.

Alarm Codes and Actions

There is one (1) PTI alarm that could be generated on a unit equipped / utilizing an O2 sensor.

    Notice
  • Equipment Damage
  • If the inlet/outlet tubes or filter need to be cleared, disconnect from the gas analyzer BEFORE purging air through the tubes. If tubes remain connected, serious damage to the gas analyzer could occur.
Alarm Possible Cause Corrective Action(s)
Code 122 - O2 Sensor Calibration Error (if equipped) (PTI Only)

  1. Stale atmosphere / Filter or inlet / outlet tubes restricted (See Notice Above).

  2. O2 sensor reading < 17% or > 25%.

  1. Open evaporator access door or fully open vent door and allow unit to operate on high speed fan for 20 to 30 minutes to purge any old, stale air trapped in the analyzer module before performing PTI.

  2. If O2 reading is still out of calibration range after purge procedure noted above is performed, replace analyzer.
Values Menu Possible Cause Corrective Action(s)
CO2% Open or Short If no alarm has been generated, the system most likely has not communicated with or is verifying communications with the analyzer. Follow corrective action for Stale Atmosphere procedure above. If fault exists, an alarm will be generated.
O2% Open or Short If no alarm has been generated, the system most likely has not communicated with or is verifying communications with the analyzer. Follow corrective action for Stale Atmosphere procedure above. If fault exists, an alarm will be generated.