Lennox Core Unit Controller Setup Manual page 45

SELECTED ALARMS (MARKED WITH * IN TAbLE RESULT IN THE CLOSURE OF THE SERVICE RELAY CONTACTS (DO1).
ALARM
DISPLAY MESSAGE
CODE
GAS CAB PRESSURE SW CLOSED
166
GV1
GAS CAB PRESSURE SW CLOSED
167
GV2
COMBUSTION AIR SW NOT OPEN
168*
LOCKOUT GV1
COMBUSTION AIR SW NOT OPEN
169*
LOCKOUT GV2
170 PWR EXH UNCONFIGURED
171 PWR EXH CONFIG ERROR
172 EP UNCONFIGURED
173 AIR FLOW SW CONFIG ERR
174 BYPAS DAMPER CONFIG ERR
175 NO INPUT SHARING
176 SBUS OBSOLETE M2 CMD
177 NO MODEL NUMBER
178 LOW SUMP SUPERHEAT
179 STRIKE3 LOW SUMP SUPERHEAT
180 DEFECTIVE CRANKCASE HEATER1
181 DEFECTIVE CRANKCASE HEATER2
182 SUCTION PRESSURE SENSOR
183 COMP1 SUMP TEMP SENSOR
184 COMP2 SUMP TEMP SENSOR
185 ULTRA
186* BLOWER MOTOR FAULT
187 INVERTER MINOR
NOTE: The inverter will automatically slow the compressor speed due to any of the above conditions and the condition drops below the
time-based dependence of the system's output on present and past inputs.
Table 11. CORE Control System Alarm and Event Codes
EVENT ACTION
This alarm will occur when the combustion air pressure switch (S18) is detected as closed
immediately after the furnace demand relay is energized and before the combustion air
blower is energized. Gas valve 1.
This alarm will occur when the combustion air pressure switch (S45) is detected as closed
immediately after the furnace demand relay is energized and before the combustion air
blower is energized. Gas valve 2.
System locked out due to S45 switch closed and a specific number occurrences detected
based on Parameter 72 (max cai no prf occ) setting during a single cycle.
Configuration ID 1, position 3 is set as U (unconfigured).
Configuration ID 1, position 4 is set correctly. if position 3 is configured then position 4
must be also.
Economizer should be installed and blower should be ECM type.
Verify that Configuration ID 2, position 1 is set correctly.
Room bypass damper operation is only compatible with cab blowers. Unit Controller will
only allow zone bypass unit operation if configuration ID1 is set to installed for units with B
or T type blowers. Alarm will automatically clear when configuration conflict is corrected.
Alarm will occur if load shedding input is shared with other optional devices or inputs, for
example - global, blower overload, drain pan overflow, etc.
This alarm occurs when a SBUS master device sends a M2 style command to the CORE
Unit Controller. The alarm is immediately cleared and a history of the event is stored.
Missing model configuration data. Run setup > install and complete model number
information.
• Alarm will occur when an open or short condition is detected. Alarm will also occur
when unit controller via the temperature sensor detects an out of range. Valid range
is 30°F to 150°F. Possible causes are faulty temperature sensor / circuit or improper
installati
• The alarming value indicates which Compressor Sump Temp sensor failed.
NOTE: Not supported in Model L.
0 - Tandem 1 Compressor 2 Sump Temp Sensor Failure
1 - Tandem 2 Compressor 2 Sump Temp Sensor Failure
NOTE: Not supported in Model L.
Generic alarm for ultra issues. The alarming value will have different values for different
issues.
In systems with EBM blower, prodigy shall start monitoring the motor alarm output
(normally closed relay contact) ten seconds after blower command is sent. The CORE Unit
Controller will stop unit operation if fault conditions (relay contact open logic input high)
are detected.
NOTE: Motor alarm is wired to P259 7; shared with VFD alarm and ECM blower rpm inputs.
• Alarming Value = Inverter error code
• Possible alarming values for Prodigy Alarm 187 are:
>
>
>
• If the alarm continues after outdoor conditions have moderated, check the fan,
charge and coil. Alarm 187 will automatically clear when minimum off time expires.
• Refer to trouble shooting guide in service manual for more information.
Alarm will clear when in range temperature is detected.
12 - High Comp Current
13 - High Heat sink temperature
14 - High PFC input current
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