TL;DR

Multiple spurious alarms usually point to a single faulty sensor or a wiring issue sending bad data to the controls board. Cross-check each alarmed sensor reading against an independent instrument before replacing the controls board.

What you might see

multiple unrelated fault codes appearing
fault alarms that clear without intervention
sensor reading showing obviously wrong values
chiller trips on a fault that does not match observed conditions

Likely causes

Tap to mark as ruled out

Faulty temperature or pressure sensor sending out-of-range values to the Tracer controls
Loose or corroded wiring at the sensor or the controls module terminal strip
Failed or failing Tracer controls module or sensor input card
Power supply voltage instability affecting the controls circuit

Required tools

Chiller controls access (Trane Tracer panel) and wiring diagram
Calibrated handheld thermometer and pressure gauge
Multimeter (voltage and continuity)
Replacement sensor (Trane OEM part number)

Safety first

Confirm the chiller is in a safe, non-operating state before opening the controls enclosure.
Tracer controls modules contain ESD-sensitive components. Use a grounding strap when handling circuit boards.

Procedure

7 steps · ~60 min

1
Pull the complete active and historical fault log from the Tracer panel. List all fault codes and note which are recurring vs. one-time.
2
For each recurring fault, identify the sensor or input associated with that fault code using the Trane controls wiring diagram.[1]
3
Compare the Tracer panel reading for each suspect sensor to an independent calibrated instrument (handheld thermometer, pressure gauge). A mismatch larger than the sensor tolerance confirms a sensor fault.
4
Inspect the wiring at each suspect sensor: check for loose terminals, corrosion, chafing against the chiller shell, or damaged insulation.[1]
5
Measure the 24V or 5V sensor supply voltage at the controls module terminal. A sagging supply rail will cause multiple simultaneous sensor reading errors.
6
If a single sensor is confirmed faulty, replace it with the Trane OEM part number. After replacement, clear the fault log and monitor for 24 hours.
7
If faults persist after sensor replacement, or if the controls module itself gives a self-test failure code, contact Trane service for a module swap.

Sources

Trane CenTraVac Chiller Operation and Maintenance Manual, Trane (Trane Technologies)
Trane CenTraVac Operation and Maintenance Manual, controls diagnostics and sensor troubleshooting (general)
View source

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