Service alarms - Johnson Controls - LIT-12011950 - Building automation software - Smart Equipment Controller - 5.0

Smart Equipment Controls Sequence of Operation Technical Bulletin

Brand
Johnson Controls
Product name
Smart Equipment Controller
Document type
Technical Bulletin
Document number
LIT-12011950
Version
5.0
Revision date
2024-06-06
Product status
Active
Language
English
Table 1. Service alarms
Alarm How It Happens
Duct Pressure Sensor Failure Input Unreliable and Variable Speed Fan
Return Air Humidity Sensor Failure Input unreliable
Outdoor Air Humidity Sensor Failure Input unreliable
Supply Humidity Sensor Failure Input unreliable
Indoor Air Quality Sensor Failure Input unreliable
Outdoor Air Quality Sensor Failure Input unreliable
Fresh Air Intake Sensor Failure Input unreliable
Mixed Air Temp Sensor Failure Input unreliable
Space Indoor temp Sensor Failure Input unreliable
Space Offset Sensor Failure Input unreliable
C1 Shutdown Due to High Pressure HPS1 Trip
C2 Shutdown Due to High Pressure HPS2 Trip
C3 Shutdown Due to High Pressure HPS3 Trip
C4 Shutdown Due to High Pressure HPS4 Trip
C1 Shutdown Due to Low Pressure LPS1 Trip
C2 Shutdown Due to Low Pressure LPS2 Trip
C3 Shutdown Due to Low Pressure LPS3 Trip
C4 Shutdown Due to Low Pressure LPS4 Trip
C1 Shutdown Due to Coil Freeze FS1 Trip (Evap Coil Temp < Evap Coil Temp Cutout SP)
C2 Shutdown Due to Coil Freeze FS2 Trip (Evap Coil Temp < Evap Coil Temp Cutout SP)
C3 Shutdown Due to Coil Freeze FS3 Trip (Evap Coil Temp < Evap Coil Temp Cutout SP)
C4 Shutdown Due to Coil Freeze FS4 Trip (Evap Coil Temp < Evap Coil Temp Cutout SP)
Low Outdoor Air Temp Cooling Cutout OAT < OAT Cooling Cutout
Econ Economizing When it Should Not Economizer Damper % Command > Min OA Position + FDD Damper Min Position Tolerance
Econ Not Economizing When It Should Economizer Damper % Command < Min OA Position
+ FDD Damper Min Position Tolerance
Economizer Damper Not Modulating ABS(Economizer Damper % Command - Economizer Damper Position) > FDD Economizer Damper Allowed Error
Economizer Letting In Excess Outdoor Air (Economizer Damper % Command > Min OA Position
+ FDD Damper Min Position Tolerance AND Ramp Min OA) OR
(Economizer Damper % Command > FDD Damper Min Position Tolerance AND Ramp Closed)
HS1 Shutdown Due to Limit Switch LS1 Trip
HS2 Shutdown Due to Limit Switch LS2 Trip
HS3 Shutdown Due to Limit Switch LS3 Trip
HS1 Off Due to Gas Valve H1 with no GV1 for >=6 minutes
HS2 Off Due to Gas Valve H2 with no GV2 for >=6 minutes
HS3 Off Due to Gas Valve H3 with no GV3 for >=6 minutes
Dirty Filter DFS Trip
FDD 1 Communication Failure FDD Master Online -> Offline
FDD 2 Communication Failure FDD Slave Online -> Offline
Unit has Received a Purge Request PURGE-S on Econ trip
Excessive Supply Air Temp Cooling SAT < Excessive SAT Cooling Sp AND SAT Limit for Cooling Enable
HS1 Gas Valve Failure GV1 on without H1 for >= 5 seconds
HS2 Gas Valve Failure GV2 on without H2 for >= 5 seconds
HS3 Gas Valve Failure GV3 on without H3 for >= 5 seconds
Excessive Supply Air Temp Heating SAT > Excessive SAT Heating SP AND SAT Air Temp Limit for Heat Enabled
Space Temperature Cooling Alarm Space Temp > Operating Cooling SP for more than 60 minutes
C1 Refrigerant Flow Restriction FDD Alarm, see Table 1
Hot H20 FS Open to Prevent Coil Freeze Hydronic Heating Enabled and (HW Freeze BI trip and Unreliable OAT) or HW Freeze BI trip and OAT is less than 40°F
Hot H20 FS Opened When It Should Not Hydronic Heating Enabled and OAT is greater than 40°F and HW Freeze BI trip
Space Temperature Heating Alarm Space Temp is less than Operating Heating SP for more than 60 minutes.
Not Economizing - No Supply Air Sensor Free Cooling Available and MA Sequencer = DAT Control and SAT Unreliable or
SAT Unrealiable and MA Sequence = Zone Control and MA State = Mech and Free Cooling Available or Tstat Only and Mech and Free Cooling Available
Using Return Instead of Space Temp Effective Zone Source = Return Air Temp and Not TStat Only
Proof Of Air Flow With No Fan Command APS is closed, but fan command is not given
C1 Suction Pressure Sensor Failure Input unreliable
C1 Suction Temperature Sensor Failure Input unreliable
C1 Discharge Pressure Sensor Failure Input unreliable
C1 Discharge Temperature Sensor Failure Input unreliable
C2 Suction Pressure Sensor Failure Input unreliable
C2 Suction Temperature Sensor Failure Input unreliable
C2 Discharge Pressure Sensor Failure Input unreliable
C2 Discharge Temperature Sensor Failure Input unreliable