Alarm Insights
Analytics on the alarm history — what recurs, what lingers, what chatters, and what each alarm led to. Live alarm handling stays with the real-time BMS.
Unresolved
1
Oldest active 3.7 days
Most Recurring
4×
F-LOW-DAT · AHU-02
Fleeting Patterns
3
Self-clear ≤ 60 min — nuisance alarms
Chattering Patterns
2
≥ 3 annunciations in one day
Stale Patterns
7
Active > 24 h before clearing
Led to Work Orders
57.1%
8 of 14 alarm types
Alarm TrendStaticDev
Alarm occurrences per week, split by severity tier — a rising bar is an asset asking for attention before it trips
Unresolved the Longest
Fan vibration highAHU-01 North Wingactive 3.7 dayssince Jul 2, 2026Unacknowledged
Most Recurring AlarmsStaticDev
4×Discharge air below setpointAHU-02 South Wing · last Jan 21, 2026, 10:30 a.m.WARNINGChatteringFleeting
3×VFD overcurrent tripAHU-03 Production Hall · last Jun 24, 2026, 2:30 p.m.TRIPChattering
1×Fan vibration highAHU-01 North Wing · last Jul 2, 2026, 6:45 a.m.WARNINGOpenStale
1×Fan vibration criticalAHU-03 Production Hall · last Jun 17, 2026, 6:30 p.m.CRITICALStale
1×Chiller high-pressure tripCH-01 Central Chiller · last Jun 18, 2026, 2:30 p.m.TRIP
1×High duct static tripAHU-02 South Wing · last Jun 3, 2026, 2:15 p.m.TRIPFleeting
1×Freeze-stat tripAHU-02 South Wing · last Jan 21, 2026, 6:45 a.m.TRIP
1×Boiler flame-failure lockoutBLR-02 South Boiler · last Jan 20, 2026, 5:45 a.m.TRIP
Most Affected Assets
Maintenance Outcomes
Alarms resolved by a work order
VFD overcurrent tripAHU-03 Production HallBearing Replacement · Jun 25, 2026 · $2,850
High duct static tripAHU-02 South WingFilter Change · Jun 6, 2026 · $245
Freeze-stat tripAHU-02 South WingActuator Repair · Jan 21, 2026 · $410
Boiler flame-failure lockoutBLR-02 South BoilerIgniter Replacement · Jan 22, 2026 · $260
Chiller efficiency degradedCH-01 Central ChillerCondenser Cleaning · Jun 19, 2026 · $1,150
Fan vibration highAHU-03 Production HallVibration Analysis · May 5, 2026 · $450
Boiler flue temperature highBLR-01 East BoilerBurner Service · Mar 20, 2026 · $980
Hot-water valve huntingAHU-02 South WingControls Tuning · Feb 13, 2026 · $290
Recurring with no corrective action recorded
Discharge air below setpointAHU-02 South Wing · 4× · avg clear 38 minCleared on its own each time — worth a root-cause look or an alarm-limit review before it recurs.
Alarm AnalysisStaticDev
| Alarm | Asset | Severity | Count | Avg Clear | Pattern | Takeaway |
|---|---|---|---|---|---|---|
| F-VIB-HIGHFan vibration high | AHU-01 | WARNING | 1×last Jul 2, 2026, 6:45 a.m. | — | OpenStale | Still open at the end of the data — active for 3.7 days (since Jul 2, 2026), not yet acknowledged. Needs follow-up. |
| F-VIB-CRITFan vibration critical | AHU-03 | CRITICAL | 1×last Jun 17, 2026, 6:30 p.m. | 7.5 days | Stale | Remained active 7.5 days before clearing — review response and escalation time. |
| F-OVERCURRENTVFD overcurrent trip | AHU-03 | TRIP | 3×last Jun 24, 2026, 2:30 p.m. | 5.8 h | Chattering | Resolved by Bearing Replacement on Jun 25, 2026. Annunciated 3× in a single day — the condition was oscillating at its limit; address the root cause rather than re-acknowledging. |
| F-HP-TRIPChiller high-pressure trip | CH-01 | TRIP | 1×last Jun 18, 2026, 2:30 p.m. | 1.5 h | Cleared in 1.5 h without a linked work order. | |
| F-HIGH-STATICHigh duct static trip | AHU-02 | TRIP | 1×last Jun 3, 2026, 2:15 p.m. | 60 min | Fleeting | Resolved by Filter Change on Jun 6, 2026. Self-cleared in ~60 min on average — nuisance-alarm pattern; consider an alarm delay or a revised limit. |
| F-FREEZE-STATFreeze-stat trip | AHU-02 | TRIP | 1×last Jan 21, 2026, 6:45 a.m. | 3 h | Resolved by Actuator Repair on Jan 21, 2026. | |
| F-FLAME-FAILBoiler flame-failure lockout | BLR-02 | TRIP | 1×last Jan 20, 2026, 5:45 a.m. | 75 min | Resolved by Igniter Replacement on Jan 22, 2026. | |
| F-COP-LOWChiller efficiency degraded | CH-01 | WARNING | 1×last Jun 10, 2026, 1:00 p.m. | 8.8 days | Stale | Resolved by Condenser Cleaning on Jun 19, 2026. Remained active 8.8 days before clearing — review response and escalation time. |
| F-FILTER-DIRTYFilter service required | AHU-02 | WARNING | 1×last May 21, 2026, 4:45 p.m. | 15.7 days | Stale | Remained active 15.7 days before clearing — review response and escalation time. |
| F-VIB-HIGHFan vibration high | AHU-03 | WARNING | 1×last May 1, 2026, 11:30 a.m. | 54.8 days | Stale | Resolved by Vibration Analysis on May 5, 2026. Remained active 54.8 days before clearing — review response and escalation time. |
| F-FLUE-TEMPBoiler flue temperature high | BLR-01 | WARNING | 1×last Mar 12, 2026, 9:15 a.m. | 7.9 days | Stale | Resolved by Burner Service on Mar 20, 2026. Remained active 7.9 days before clearing — review response and escalation time. |
| F-VALVE-HUNTHot-water valve hunting | AHU-02 | WARNING | 1×last Feb 10, 2026, 9:00 a.m. | 3.3 days | Stale | Resolved by Controls Tuning on Feb 13, 2026. Remained active 3.3 days before clearing — review response and escalation time. |
| F-LOW-DATDischarge air below setpoint | AHU-02 | WARNING | 4×last Jan 21, 2026, 10:30 a.m. | 38 min | ChatteringFleeting | Annunciated 3× in a single day — the condition was oscillating at its limit; address the root cause rather than re-acknowledging. Self-cleared in ~38 min on average — nuisance-alarm pattern; consider an alarm delay or a revised limit. |
| F-LOW-DATDischarge air below setpoint | AHU-01 | WARNING | 1×last Jan 21, 2026, 7:30 a.m. | 60 min | Fleeting | Self-cleared in ~60 min on average — nuisance-alarm pattern; consider an alarm delay or a revised limit. |
Occurrence Log — 19 alarm events in the window
| Description | |||||||
|---|---|---|---|---|---|---|---|
| Jul 2, 2026, 6:45 a.m. | AHU-01 | F-VIB-HIGH | WARNING | Supply fan vibration crossed warning threshold (5.0 mm/s). Reading: 5.06 mm/s. Rapid onset over ~10 days suggests belt wear or sheave misalignment - inspect drive assembly. | — | — | — |
| Jun 24, 2026, 2:30 p.m. | AHU-03 | F-OVERCURRENT | TRIP | VFD overcurrent protection tripped (trip 3 of the day). Current at trip: 18.5 A. Vibration: 7.29 mm/s. Third trip - unit held out of service pending bearing replacement. | Jun 24, 2026, 2:40 p.m. | Jun 25, 2026, 7:00 a.m. | 16.5 |
| Jun 24, 2026, 12:45 p.m. | AHU-03 | F-OVERCURRENT | TRIP | VFD overcurrent protection tripped (trip 2 of the day). Current at trip: 17.7 A. Vibration: 7.23 mm/s. Second trip after reset. Vibration severely elevated. | Jun 24, 2026, 12:55 p.m. | Jun 24, 2026, 1:15 p.m. | 0.5 |
| Jun 24, 2026, 11:00 a.m. | AHU-03 | F-OVERCURRENT | TRIP | VFD overcurrent protection tripped (trip 1 of the day). Current at trip: 16.2 A. Vibration: 7.21 mm/s. Operator reset after inspection; no obstruction found. | Jun 24, 2026, 11:10 a.m. | Jun 24, 2026, 11:30 a.m. | 0.5 |
| Jun 18, 2026, 2:30 p.m. | CH-01 | F-HP-TRIP | TRIP | High discharge-pressure safety trip at peak heat-wave load (OA 34.7 C). Fouled condenser could not reject heat at full load. Unit locked out pending inspection. | Jun 18, 2026, 2:50 p.m. | Jun 18, 2026, 4:00 p.m. | 1.5 |
| Jun 17, 2026, 6:30 p.m. | AHU-03 | F-VIB-CRIT | CRITICAL | Supply fan vibration crossed critical threshold (7.0 mm/s). Reading: 7.01 mm/s. Schedule immediate maintenance. | Jun 17, 2026, 7:30 p.m. | Jun 25, 2026, 7:00 a.m. | 180.5 |
| Jun 10, 2026, 1:00 p.m. | CH-01 | F-COP-LOW | WARNING | Chiller efficiency degraded: COP trending ~4.1 against ~5.2 expected at this condition. Condenser approach temperature elevated - coil fouling suspected. Schedule condenser cleaning. | Jun 10, 2026, 5:00 p.m. | Jun 19, 2026, 8:00 a.m. | 211 |
| Jun 3, 2026, 2:15 p.m. | AHU-02 | F-HIGH-STATIC | TRIP | Supply duct high-static safety tripped. Static at trip: 457 Pa. Filter DP: 259 Pa. | Jun 3, 2026, 2:35 p.m. | Jun 3, 2026, 3:15 p.m. | 1 |
| May 21, 2026, 4:45 p.m. | AHU-02 | F-FILTER-DIRTY | WARNING | Filter differential pressure exceeded warning threshold (250 Pa). Current: 250 Pa. Service filter bank. | May 21, 2026, 6:45 p.m. | Jun 6, 2026, 9:00 a.m. | 376.3 |
| May 1, 2026, 11:30 a.m. | AHU-03 | F-VIB-HIGH | WARNING | Supply fan vibration crossed warning threshold (5.0 mm/s). Reading: 5.01 mm/s. Recommend bearing inspection. | May 1, 2026, 5:30 p.m. | Jun 25, 2026, 7:00 a.m. | 1,315.5 |
| Mar 12, 2026, 9:15 a.m. | BLR-01 | F-FLUE-TEMP | WARNING | Flue-gas temperature elevated (~99 C vs ~70 C expected at this load) and combustion efficiency trending down ~6.7 points - heat-exchanger scaling suspected. Schedule burner service and descale. | Mar 12, 2026, 12:15 p.m. | Mar 20, 2026, 8:00 a.m. | 190.8 |
| Feb 10, 2026, 9:00 a.m. | AHU-02 | F-VALVE-HUNT | WARNING | Hot-water valve hunting - coil flow oscillating ~28% around demand at 15-minute period; discharge air temperature unstable (±2.5 C around setpoint). Control loop requires retuning. | Feb 10, 2026, 11:00 a.m. | Feb 13, 2026, 4:00 p.m. | 79 |
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