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コード H2: Number of slave units detected by master unit has decreased

問題の説明と安全警告

Trane TVR Pro VRF (220V) は重大な Number of slave units detected by master unit has decreased アラームをトリガーしました。製造サイクル中に機器への二次的損傷や部品の破損を防ぐために、資格のあるオペレーターまたはメンテナンス技術者による直ちの対応が必要です。電気キャビネットにアクセスする前に、必ず標準の安全およびLOTO手順が遵守されていることを確認してください。

公式トラブルシューティング手順

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.

Trane TVR Pro VRF (220V) のアラームについて

Trane によって構築された産業用コントローラーは、内部回路と機械的リンケージを保護するための広範な診断システムで設計されています。TVR Pro VRF (220V) が H2 のようなエラーコードをスローする場合、通常、指令値と実際のセンサーフィードバック間の不一致を示します。

完全アラーム一覧: 38 Trane TVR Pro VRF (220V) コードs.

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