OM 1077-1 • MAVERICK I 32 www.DaikinApplied.com
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larM
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Alarm Designation
Origin
Description
Status/Troubleshooting Information
ELM - RAE Sensor Fail
ELM
Sensor short, failure
• Replace the sensor
• Check sensor is installed correctly on
control
ELM - MAT Sensor Fail
ELM
Sensor short, failure
• Extreme temperatures
• Replace the sensor
• Check sensor is installed correctly on
control
ELM – CO
2
Sensor Fail
ELM
Sensor short, failure
• DCV is enabled with no sensor
• Replace the sensor
• Check sensor is installed correctly on
control
ELM Actuator Fault
ELM
Low Discharge Air Temp – DAT
DDC Controller
Threshold is 30°F.
• Check to make sure the Discharge Air
temperature is below the set point
• Replace the sensor
• Low refrigerant
High Return Air Temp – RAT
DDC Controller
Threshold is 120°F.
• Check to make sure the Return Air
temperature is not above the set point
• Replace the sensor
Return Air Sensor Fail – RAT
DDC Controller
If the sensor has ever been installed to the unit, the
alarm will be set if it becomes unavailable.
• Extreme temperatures
• Replace the sensor
• Check sensor is installed correctly on
control
Discharge Air Sensor Fail – DAT
DDC Controller
If the sensor has never been installed to the unit,
the alarm will be set if it becomes unavailable.
• Extreme temperatures
• Replace the sensor
• Check sensor is installed correctly on
control
Outdoor Air Temperature Sensor Fail – OAT
DDC Controller
Control changes defrost to time x temperature
mode. The heat source continues to be heat pump,
independently of the outdoor air temperature.
Additional heat sources are also available in case
the demand is not satisfied.
• Extreme temperatures
• Replace the sensor
• Check sensor is installed correctly on
control
Condenser Coil 2 Temperature Out of Range
DDC Controller
No defrost operation, but unit continues to operate
in either heating or cooling.
• Extreme temperatures
• Replace the sensor
• Check sensor is installed correctly on
control
Discharge Air Temperature Out of Range
DDC Controller
If the sensor has ever been installed to the unit, the
alarm will be set if it becomes unavailable.
• Extreme temperatures
• Replace the sensor
• Check sensor is installed correctly on
control
Emergency Stop Fault
Complete shutdown
Comm Card Miscommunication
DDC Controller
Communication card failed to communicate with the
DDC Controller
• Check wire connection at both
controls
• Bad Comm card and/or DDC
Controller
DDC Controller Miscommunication with IFC
IFC
IFC failed to communicate with the DDC Controller
• Check wire connection at both
controls
• Bad IFC and/or DDC Controller
Internal Control Fault – DDC Controller
DDC Controller
Internal Control Fault – IFC
IFC
Space Sensor Alarm
DDC Controller
If the space sensor fails open or shorted, the
space sensor alarm will be set, but the control will
continue to operate using the return air sensor in
place of the space sensor. If the control has never
sensed a valid space sensor input, it will assume no
space sensor is present to be used, and not set the
space sensor alarm. If a valid space sensor input is
ever detected, the control will set a non-volatile flag
to indicate the control should have and use a space
sensor. When the non-volatile flag is set, the control
will detect space sensor alarm conditions.
• Replace the sensor
• Check sensor is installed correctly on
control
Space Sensor & Return Sensor Fail
DDC Controller
Indicate presence of the alarm and convert
operation to thermostat mode.
• Replace the sensors
• Check sensors are installed correctly
on control
