Economizer Fault; Outdoor Air Damper Fault Detection And Diagnostics (Fdd) - Trane Symbio 700 Controller Application Manual

Communication Status is "Not

Economizer Fault

Table 10. Economizer cooling failure modes and system response

Outdoor Air Damper Fault Detection and Diagnostics (FDD)

The outdoor air damper fault will have two fault detection components, faults that are generated when
operating in minimum ventilation mode and another set when the damper is being controlled by the
economizer:
ACC-APG002A-EN
Fault
Diagnostic: IGN1 Flame Gas Heat Ignition Module via
Sensed w/Gas Valve Off
Diagnostic: IGN1 Hardware
Gas Heat Ignition Module via
Configuration Error
Diagnostic: IGN1 Weak Gas Heat Ignition Module via
Flame
Diagnostic: IGN1 Gas Valve Gas Heat Ignition Module via
Error
Diagnostic: IGN1 Module Gas Heat Ignition Module via
Failure
Gas Heat Ignition Module 1
Communicating"
Economizer Control
Comparative Enthalpy
Reference Enthalpy
Dry Bulb
Differential Dry Bulb
Fresh Air Options Module
Fault Detection
Modbus
•
Modbus
•
Modbus
Modbus
Modbus
When Gas Heat Ignition
•
Module 1 Communication
Status is "Not
Communicating" for 30
•
continuous seconds.
Failure Mode
Return Air Humidity Sensor
Return Air Temperature Sensor
Outdoor Air Temperature Sensor
Outdoor Air Humidity Sensor
Outdoor Air Temperature Sensor
Outdoor Air Humidity Sensor
Outdoor Air Temperature Sensor
Outdoor Air Temperature Sensor
Return Air Temperature Sensor
Communications Failure
Troubleshooting
Symbio 700 Response
Status Only (Ignition Module Lockout)
All heating operation is terminated/
disabled
Diagnostic: Heat Failure set to Active
Status Only
Status Only (Ignition Module Lockout)
Status Only (Ignition Module Lockout)
All heating operation is terminated/
disabled
Diagnostic: Heat Failure set to Active
Economizer Cooling Response
Absolute (Reference) Enthalpy
Absolute (Reference) Enthalpy
• Economizer Cooling Disabled
• OA Damper Closes to Economizer
Minimum Position Setpoint Control
Absolute Temperature (Reference Dry
Bulb)
• Economizer Cooling Disabled
• OA Damper Closes to Economizer
Minimum Position Setpoint Control
Absolute Temperature (Reference Dry
Bulb)
• Economizer Cooling Disabled
• OA Damper Closes to Economizer
Minimum Position Setpoint Control
• Economizer Cooling Disabled
• OA Damper Closes to Economizer
Minimum Position Setpoint Control
Absolute Temperature (Reference Dry
Bulb)
All economizing operation is
discontinued
Response
Type
Auto Reset
Auto Reset
Auto Reset
Auto Reset
Auto Reset
Auto Reset
49