Código H2: Number of slave units detected by master unit has decreased
Descripción del problema y advertencia de seguridad
El Trane TVR Pro VRF (220V) ha desencadenado una alarma crítica Number of slave units detected by master unit has decreased. Se requiere la atención inmediata de un operador calificado o técnico de mantenimiento para evitar daños secundarios al equipo o piezas estropeadas durante el ciclo de fabricación. Asegúrese siempre de seguir los procedimientos de seguridad estándar y LOTO antes de acceder a los armarios eléctricos.
Pasos oficiales de solución de problemas
Manual restart required: No Display: Only displayed on the master unit Description: H2 indicates that the number of slave units detected by master unit has decreased. H3 indicates that the number of slave units detected by master unit has increased. All units stop running. Error code is only displayed on the master unit. Trigger condition: Number of slave units detected by master unit has decreased or increased. Recover condition: Number of slave units detected by master unit goes back to normal. Reset method: Resume automatically. Possible causes: - Some outdoor units are powered off. - Power supply abnormal. - Incorrect outdoor unit address setting. - Communication wires between outdoor units not connected properly. - Loosened wiring within electric control box. - Damaged main PCB or electric control box communication terminals block.
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.
Acerca de las alarmas de Trane TVR Pro VRF (220V)
Los controladores industriales construidos por Trane están diseñados con amplios sistemas de diagnóstico para proteger los circuitos internos y los enlaces mecánicos. Cuando un TVR Pro VRF (220V) arroja un código de error como H2, generalmente indica un desajuste entre los valores ordenados y la retroalimentación real del sensor.
Lista completa de alarmas: 38 Trane TVR Pro VRF (220V) códigos.
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