OMM 1087 AGZ 025D through 190D 37
EXV Module 1 Comm Failure
Trigger: Expansion Valve Type = Electronic and communication with the I/O extension module has failed.
Action Taken: Rapid stop of circuit 1.
Reset: This alarm can be cleared manually via the keypad or BAS command when communication between
main controller and the extension module is working for 5 seconds or Expansion Valve Type = Thermal.
EXV Module 2 Comm Failure
Trigger: Expansion Valve Type = Electronic and communication with the I/O extension module has failed.
Action Taken: Rapid stop of circuit 2.
Reset: This alarm can be cleared manually via the keypad or BAS command when communication between
main controller and the extension module is working for 5 seconds or Expansion Valve Type = Thermal.
Unit Problem Alarms
Low Ambient Lockout
Trigger: The OAT drops below the low ambient lockout set point AND the OAT sensor fault is not active.
Action Taken: Normal shutdown of all circuits.
Reset: The lockout should clear when OAT rises to the lockout set point plus 2.8°C (5°F).
Evaporator Pump #1 Failure
Trigger: Unit is configured with primary and backup pumps, pump #1 is running, and the pump control logic
switches to pump #2.
Action Taken: Backup pump is used.
Reset: This alarm can be cleared manually via the keypad or BAS command
Evaporator Pump #2 Failure
Trigger: Unit is configured with primary and backup pumps, pump #2 is running, and the pump control logic
switches to pump #1.
Action Taken: Backup pump is used.
Reset: This alarm can be cleared manually via the keypad or BAS command
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