Lennox Prodigy 2.0 User Manual

Page 146
TABLE 66. PRODIGY 2.0 ALARM CODES
TYPE
ALARM
CODES
Event ActionDISPLAY MESSAGE
TYPE
ALARM
CODES
123 ALARM 24VAC PRIMARY VOLTAGE HIGH
High output voltage on T1 transformer. alarm set when 24VAC voltage high if calculated RMS voltage is below low voltage
alarm threshold for more than two seconds. System will stop unit operations (cooling, heating and ventilation). Low
voltage threshold is 30VAC.
The M3 unit controller will clear alarm 24VAC Voltage high if calculated RMS voltage is above High Voltage Alarm
Threshold + 1 VAC for more than two seconds. After the HIGH 24VAC alarm has been cleared, the M3 unit controller will
ignore all service demands until the Error Time Off Delay has expired.
124 ALARM 24VAC SECONDARY VOLTAGE LOW
Low output voltage on T1 transformer. alarm set when 24VAC voltage low if calculated RMS voltage is below low voltage
alarm threshold for more than two seconds. System will stop unit operations (cooling, heating and ventilation). Low voltage
threshold is 18VAC.
The M3 unit controller will clear alarm 24VAC Voltage Low if calculated RMS voltage is above Low Voltage Alarm
Threshold + 1 VAC for more than two seconds. After the low 24VAC alarm has been cleared, the M3 unit controller will
ignore all service demands until the Error Time Off Delay has expired.
125 ALARM 24VAC SECONDARY VOLTAGE HIGH
High output voltage on T1 transformer. alarm set when 24VAC voltage high if calculated RMS voltage is below low voltage
alarm threshold for more than two seconds. System will stop unit operations (cooling, heating and ventilation). Low voltage
threshold is 30VAC.
The M3 unit controller will clear alarm 24VAC Voltage HIGH if calculated RMS voltage is above high voltage alarm
Threshold + 1 VAC for more than two seconds. After the high 24VAC alarm has been cleared the M3 unit controller will
ignore all service demands until the Error Time Off Delay has expired.
126 ALARM
LINE PHASING DOES NOT MATCH UNIT
CONFIG
during power up or reset of unit, Mismatch on single or 3phase power, or reverse rotation on 3phase detected. This alarm
is enabled by the PhaseVoltage Detection feature.
127 - 128 RESERVED
129 ALARM VFD SHUTDOWN VFD fault detected. Check belt and for blower overload. Fix source of fault and reset M3 unit controller.
130 ALARM VFD BYPASS ENGAGED VFD bypass mode. Mode is engaged. Blower may or may not be disengage.
131 RESERVED
132 ALARM VFD BYPASS NOT CONFIGURED VFD bypass mode has not been selected. Unit operates as if bypass is not installed.
133 RESERVED
134 ALARM ADVANCE AIRFLOW LOW SUPPLY CFM
Advance Airflow enabled RTU  indicates airflow target cannot be achieved. Check cause of airflow reduction such as dirty
filter, changes in duct work, etc
135 ALARM ADVANCE AIRFLOW NO AIRFLOW
Blower RPM is too low as indicates by blower status. This means that the blower is not working. Repair blower and reset
M3 unit controller.
136 ALARM
ADVANCE AIRFLOW OUTSIDE AIR
DAMPER/ECON MECHANICAL FAULT
Outdoor air damper stuck or actuator problem.
137 ALARM
ADVANCE AIRFLOW LOW OUTDOOR AIR
FLOW
Outdoor airflow is too low so the building is not getting the designed outdoor airflow based on IAQ.
138 RESERVED
139 ALARM
ADVANCE AIRFLOW OUTDOOR AIRFLOW
TOO HIGH
Ventilation CFM is too high so the RTU is wasting energy.
140 ALARM
ADVANCE AIRFLOW CFM UNATTAINABLE 
TARGET TOO LOW
verify the MSAV blower settings and set the CM targets below set CFM. The alarm value will be displayed on the M3 Unit
Controller screen.
141 ALARM
ADVANCE AIRFLOW CFM UNATTAINABLE 
TARGET TOO HIGH
verify the MSAV blower settings and set the cm targets below set CFM. The alarm value will be displayed on the M3 Unit
Controller screen.
142 RESERVED

Lennox Prodigy 2.0 Specifications

General

Brand	Lennox
Model	Prodigy 2.0
Category	Controller
Language	English