Lennox Core Unit Controller User Manual

39
Table 11. CORE Control System Alarm and Event Codes
SELECTED ALARMS (MARKED WITH * IN TABLE RESULT IN THE CLOSURE OF THE SERVICE RELAY CONTACTS (DO1).
ALARM
CODE
DISPLAY MESSAGE EVENT ACTION
18 HIGH PRESS S96 OPEN COMP4
• Compressor lockout. Check charge, fans and coil.
• The CORE Unit Controller will clear high pressure switch alarm when corresponding
high pressure switch is detected as closed. Compressor will not be restarted until
corresponding high pressure switch is closed and Minimum Off Delay (cooling or
heating) has expired.
19*
STRIKE3 HIGH PRESS S96 OPEN
COMP4
• Compressor lockout. Check charge, fans and coil. Use service menu to clear
lockouts.
• User will be able to clear high pressure switch compressor lockout and alarm via user
interface. High pressure switch compressor lockout and alarm will be cleared after
the CORE Unit Controller reset.
• High pressure switch compressor lockout and alarm is cleared on removal of cooling
demand. Default is 3 occurrences and can be set between 1 and 7 occurrences.
NOTE: EVENTS 12 THROUGH 19 COULD ALSO BE CAUSED BY A HIGH TEMPERATURE CONDITION ON SOME COMPRESSORS EQUIPPED
WITH A HIGH TEMPERATURE SHUTDOWN.
20 PHASE MONITOR
Phase monitor or blower motor overload switch or inverter fault output or condensate
overowswitchisindicatinganissue.
21 RESERVED
22 LOW PRESS S87 OPEN COMP1 Compressor is off. Check charge, fans and coil. Use service menu to clear lockouts.
23*
STRIKE3 LOW PRESS S87 OPEN
COMP1
• Compressor is off. Check charge, fans and coil. Use service menu to clear lockouts.
• Number of occurrences is set using Parameter 99 (max lo occurrences). Default is 3
occurrences.
24 LOW PRESS S88 OPEN COMP Compressor is off. Check charge, fans and coil.
25*
STRIKE3 LOW PRESS S88 OPEN
COMP2
• Compressor is off. Check charge, fans and coil. Use service menu to clear lockouts.
• Number of occurrences is set using Parameter 99 (max lo occurrences). Default is 3
occurrences.
26 LOW PRESS S98 OPEN COMP Compressor if off. Check charge, fans and coil.
27*
STRIKE3 LOW PRESS S98 OPEN
COMP3
• Compressor is off. Check charge, fans and coil. Use service menu to clear lockouts.
• Number of occurrences is set using Parameter 99 (max lo occurrences). Default is 3
occurrences.
28 LOW PRESS S97 OPEN COMP Compressor if off. Check charge, fans and coil.
29*
STRIKE3 LOW PRESS S97 OPEN
COMP4
• Compressor is off. Check charge, fans and coil. Use service menu to clear lockouts.
• Number of occurrences is set using Parameter 99 (max lo occurrences). Default is 3
occurrences.
30* OVERFLOW SWITCH
• Checkforblockdrain,condensatelinesanddrainpanoverowswitch.
• Alarmsetifoverowswitchisdetectedopenedandcompressorwillbelockedout.
System will automatically clear alarm once switch is detected closed. System will
resume operation (compressor lockout), after the Error Timed OFF Delay has expired
followingtheOverowswitchalarmclear.
31 STRIKE3 UNIT SHUTDOWN S149 S149inputisopen,condensateoverowswitch;multipletimes.
32 FRZ STAT S49 OPEN COMP1
Compressorisoff.Checkfreezestat,airow,charge,coil,airlterandoutsideair
temperature.
33* STRIKE3 FRZ STAT S49 OPEN COMP1
• Compressorislockedout.Checkfreezestat,airow,charge,coil,airlterand
outside air temperature.
• Number of occurrences is set using Parameter 81 (max freeze sat occ). Default is 3
occurrences.
34 FRZ STAT S50 OPEN COMP2
• Compressorislockedout.Checkfreezestat,airow,charge,coil,airlterand
outside air temperature.
35* STRIKE3 FRZ STAT S50 OPEN COMP2
• Compressorislockedout.Checkfreezestat,airow,charge,coil,airlterand
outside air temperature.
• Number of occurrences is set using Parameter 81 (max freeze sat occ). Default is 3
occurrences.
36 FRZ STAT S53 OPEN COMP3
• Compressorislockedout.Checkfreezestat,airow,charge,coil,airlterand
outside air temperature.

Lennox Core Unit Controller Specifications

General

Brand	Lennox
Model	Core Unit Controller
Category	Controller
Language	English