AHU-03 Production Hall
Air Handling Unit · Carrier 39M Modular AHU · Mechanical Penthouse · Riverside Office Complex
Condition — Last 14 Days
Electrical Demand
15-minute power draw, kW — last 14 days
VibrationStaticDev
15-minute readings, mm/s RMS — last 14 days
Air Temperatures
Supply air vs. outdoor air, °C — last 14 days
Zone CO₂StaticDev
Worst zone, ppm — last 14 days
Nameplate & Ratings
- Asset ID
- AHU-03
- Asset type
- Air Handling Unit
- Manufacturer
- Carrier
- Model
- 39M Modular AHU
- Rated motor
- 11 kW
- Rated airflow
- 12,000 CFM
- Served zones
- 2
- Heat-recovery wheel
- Yes
- CHW coil design flow
- 71 GPM
- HW coil design flow
- 55 GPM
- Installed
- Aug 22, 2017
- Last major service
- Sep 5, 2025
Fault History
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.
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.
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.
Supply fan vibration crossed critical threshold (7.0 mm/s). Reading: 7.01 mm/s. Schedule immediate maintenance.
Supply fan vibration crossed warning threshold (5.0 mm/s). Reading: 5.01 mm/s. Recommend bearing inspection.
Service History
Triggered by: F-OVERCURRENT — Overcurrent trip sequence F-OVERCURRENT x3 (2026-06-24) - bearing seizure
Emergency replacement of supply fan motor bearings (DE and NDE). DE bearing showed brinelling. Vibration post-repair: 2.4 mm/s (within spec).
Triggered by: F-VIB-HIGH — F-VIB-HIGH warning (2026-05-01) and rising vibration trend
Vibration spectrum analysis: outer-race defect frequencies on DE bearing. Recommended bearing replacement at next available window; interim weekly monitoring.
Triggered by: Scheduled annual drive service (calendar)
Drive belt replaced and sheaves re-aligned. Noted elevated broadband vibration on DE bearing (3.4 mm/s); recommended vibration analysis at next PM.