Code xPL: Inverter module temperature protection
Issue Description & Safety Warning
The Trane TVR Pro VRF (220V) has triggered a critical Inverter module temperature protection alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Manual restart required: No Display: Displayed on the unit with the error Note: 'x' is a placeholder for the compressor system — 1 = compressor system A, 2 = compressor system B (e.g. 1PL / 2PL). Description: 1PL indicates inverter module A temperature protection. 2PL indicates inverter module B temperature protection. All units stop running. Error code is only displayed on the unit with the error. Trigger condition: For PL protection: Inverter module heat sink temperature (TF1/2) ≥ 80 o C. For C7 protection: PL protection appears three times in 100 minutes. Recover condition: Inverter module heat sink temperature (TF1/2) < 65 o C Reset method: For PL protection: Resume automatically. For C7 protection: Manually restart. Possible causes: - Blocked, dirty or loose heat sink. - Temperature sensor not connected properly or has malfunctioned. - Main PCB damaged.
Source: Trane 220V TVR Pro VRF Service Manual — Part 6 Diagnosis and Troubleshooting
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Trane TVR Pro VRF (220V) Alarms
Trane controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code xPL on the TVR Pro VRF (220V) identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Trane's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 38 Trane TVR Pro VRF (220V) codes.
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