FM-2024-0847

HVAC Malfunction - Building A, Floor 3

Building A, Floor 3, Zone 3-East Reported by Sarah Chen Jan 15, 2024 at 9:23 AM

Plan

Follow Procedure

Current Stage

Assigned Orchestrator

High Prio Flow

Notepad

Tenant reports the issue started around 6:30 AM when staff arrived. Multiple complaints from Zone 3-East occupants. Priority escalated due to executive offices in affected area. Initial report came from Sarah Chen who noted the temperature was noticeably warmer than usual. Checked with building ops - no scheduled maintenance on AHU-3E. Last service was 3 months ago (routine filter change). Reviewed maintenance-log.xlsx and confirmed no anomalies in recent history. Mike Torres dispatched at 10:15 AM. He confirmed the cooling coil valve on AHU-3E is showing 100% open but not achieving target temps. Actuator making clicking noise - possible mechanical failure. See bms-alerts.pdf for full diagnostic output. Temporary workaround: Increased airflow to adjacent zones to compensate. Building Manager notified of potential parts order needed. Checking vendor availability for Belimo actuator replacement.

Cases 16 bms-alerts.pdf maintenance-log.xlsx inspection-report.pdf

Activity

Inbox

Case Intake Completed 3h

Log the incoming request from Sarah Chen regarding temperature issues in Zone 3-East. Verify contact details and capture the initial complaint for the HVAC system.

Case FM-2024-0847 created from incoming request.

The temperature in our area has been uncomfortable since this morning. It feels like the AC isn't working at all. Can someone please look into this?

Case Intake completed

Triage & Prioritization Completed 2.5h

Classify the issue and assess business impact. Given that executive offices are located in Zone 3-East, escalate priority if comfort is significantly affected.

Case classified as HVAC comfort issue in Zone 3-East. Setting priority to HIGH due to executive offices in affected area and multiple occupant complaints. Routing to facilities team for immediate assessment.

Triage & Prioritization completed

Initial Assessment Completed 1.5h

Pull BMS sensor data for Zone 3-East and cross-reference with AHU-3E readings. Review the maintenance-log.xlsx to check for any recent service that might explain the anomaly.

Detected temperature anomaly in Zone 3-East. Current reading is 78°F vs setpoint of 70°F. Checking BMS alerts and sensor data now.

Pulling maintenance history for AHU-3E. Last service was October 15th - routine filter replacement. No prior issues with cooling coil valve reported.

I've analyzed the BMS data for Zone 3-East. The supply air temperature has been running 8°F above setpoint since 6:45 AM. The issue appears to be related to AHU-3E's cooling coil valve, which is showing 100% open but not achieving target temps. I recommend dispatching a technician to inspect the valve actuator.

Initial Assessment completed

On-Site Inspection Started 1h · 3 dependencies remaining

Dispatch technician to inspect the AHU and identify root cause.

Schedule technician dispatch
Confirm site access with building security
Inspect AHU-3E unit
Document findings with photos inspection-report.pdf
Check refrigerant levels
Test thermostat calibration
Check supply air temperature 3/3 temp-readings.csv
Verify actuator control signal 2/4
Measure differential pressure 0/2
Verify return air flow rate 2/2 airflow-report.pdf
Inspect fan belt tension 0/3

Technician dispatch confirmed. Mike Torres assigned and en route. I've also notified the occupants on Floor 3 that a technician is responding to the comfort issue.

Thanks for the analysis. I'm heading to Building A now. Will inspect the cooling coil valve and actuator on AHU-3E. ETA 30 minutes.

On site now. Initial visual inspection shows the cooling coil looks fine, but the valve actuator is making a clicking noise. Going to check the linkage and control signal next.

Repair Planning Planned

Based on findings from the on-site inspection, determine if a replacement valve actuator is needed for AHU-3E. Check stock availability and create a purchase-order.pdf if procurement is required.

Repair Execution Planned

Have Mike Torres replace the faulty cooling coil valve actuator on AHU-3E. Document all work performed and update the asset service history.

Testing & Verification Planned

After repair, monitor Zone 3-East temperatures via BMS for at least 30 minutes. Confirm supply air from AHU-3E reaches the 70°F setpoint before proceeding.

Closeout Planned

Contact Sarah Chen to confirm comfort has been restored in Zone 3-East. Once verified, close the case and update the AHU-3E service record with repair details.

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