Code xH0: Communication error between main control chip and inverter driver chip
Issue Description & Safety Warning
The Trane TVR Pro VRF (220V) has triggered a critical Communication error between main control chip and inverter driver chip 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. 1H0 / 2H0). Description: 1H0 indicates a communication error between the main control chip and the compressor A inverter driver chip. 2H0 indicates a communication error between the main control chip and the compressor B inverter driver chip. All units stop running. Error code is only displayed on the unit with the error. Trigger condition: Main control chip and inverter driver chip cannot communication for 2 minutes. Recover condition: Communication go back to normal. Reset method: Resume automatically. Possible causes: - Incorrect compressor inverter module address setting. - Loosened communication wiring from the main PCB to - the inverter module. - Main PCB damaged. - Compressor inverter module 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 xH0 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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