Lennox Core Unit Controller User Manual

40
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
37* STRIKE3 FRZ STAT S53 OPEN COMP3
• 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.
38 FRZ STAT S95 OPEN COMP4
• Compressorislockedout.Checkfreezestat,airow,charge,coil,airlterand
outside air temperature.
39* STRIKE3 FRZ STAT S95 OPEN COMP4
• 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.
40 RETURN AIR OVER HEAT LIMIT Heat is above set point. Check space conditions and sensors.
41 RETURN AIR UNDER COOL LIMIT Cool is below set point. Check space conditions and sensors.
42* BLOWER MOTOR OVERLOAD
• System will set an alarm if S42 witch is detected as open. System will automatically
clear alarm once S42 switch is detected closed. System will resume operation
(servicing the demands), after the Error Timed OFF Delay has expired following S42
or S135 clear.
• Check external motor overloads.
43
STRIKE3 UNIT SHUTDOWN S42 OR
S135
S42/ S135 Motor Overload multiple times.
44* GAS VALVE ON NO DEMAND GV1 Unit is off. Gas valve 1 has power, but no demand. Check gas valve and wiring.
45* GAS VALVE ON NO DEMAND GV2 Unit is off. Gas valve 2 has power, but no demand. Check gas valve and wiring.
46 NO 24VAC POWER ON A60 No 24VAC relay power on A60 (E1) board, K9-5 input. (A60)
47 NO 24VAC POWER ON A58 No 24VAC relay power on A58 (G1) board, TB35-1 input. (A58)
48 NO 24VAC POWER ON A61 No 24VAC relay power on A61(HP1) board, TB34-1 input. (A61)
49 NO 24VAC RELAY POWER ON C3 A59
Third and fourth compressors are off. Alarm automatically clears once 24VAC is present.
The CORE Unit Controller will resume operation once the ERROR TIME OFF DELAY is
completed. Parameter 110 is used to set the reference delay. Factory delay default is 300
seconds.
50 PRIMARY HEAT1 LIMIT OPEN S10
Heatsection1primarygasheatlimitswitchisopen.Checkairow,airlter,limitswitch
and wiring.
51*
STRIKE3 PRIMARY HEAT1 LIMIT OPEN
S10
Heatsection1primarygasheatlimitswitchisopen.Checkairow,airlter,limitswitch
and wiring. Number of occurrences is reached.
52 SECONDARY HEAT1 LIMIT OPEN S21
Heatsection1secondarygasheatlimitswitchisopen.Checkairow,airlter,limitswitch
and wiring.
53*
STRIKE3 SECONDARY HEAT1 LIMIT
OPEN S21
Heatsection1secondarygasheatlimitswitchisopen.Checkairow,airlter,limitswitch
and wiring. Number of occurrences is reached.
54 HEAT1 S15 LIMIT OR ROLLOUT OPEN
Heatsection1primaryelectricheatlimitswitchisopen.Checkairow,airlter,limit
switch and wiring.
55*
STRIKE3 HEAT1 S15 LIMIT OR
ROLLOUT OPEN
Heatsection1amerolloutburner1switchisopen.CheckgasrolloutswitchS47.
56 HEAT1 CAI SW S18 Check heat section 1 combustion air motor and proof switch.
57* STRIKE3 HEAT1 CAI SW S18
Check heat section 1 combustion air motor and proof switch. Number of occurrences is
reached.
58* HEAT1 NO PROOF GV1 Checkheatsection1ignitioncontrol,ameproof,gasvalve1andgassupply.
59*
NO FLAME PROOF AFTER TRIALS
GV1
Checkheatsection1ignitioncontrol,ameproof,gasvalve1andgassupply.Numberof
occurrences is reached.
60 PRIMARY HEAT2 LIMIT OPEN S99
Checkheatsection2primaryburnerlimitswitchtoseeifitisopen.Checkairow,limit
switch and wiring.
61*
STRIKE3 PRIMARY HEAT2 LIMIT OPEN
S99
Checkheatsection2primaryburnerlimitswitchtoseeifitisopen.Checkairow,limit
switch and wiring. Number of occurrences is reached.
62 SECONDARY HEAT2 LIMIT OPEN S100 Heatsection2secondaryheatlimitswitchisopen.Checkairow,limitswitchandwiring.
63*
STRIKE3 SEC HEAT2 LIMIT OPEN
S100
Heatsection2secondaryheatlimitswitchisopen.Checkairow,limitswitchandwiring.
Number of occurrences is reached.
64 HEAT2 ROLL OUT OPEN Flameshavebeendetectedoutsidethegasheater’srebox.
65* STRIKE3 HEAT2 ROLL OUT OPEN Check roll out sensor and gas supply.
66 HEAT2 CAI SW Check heat section 2 combustion air motor and proof switch.

Lennox Core Unit Controller Specifications

General

Brand	Lennox
Model	Core Unit Controller
Category	Controller
Language	English