Kouwa KMV-75-MOZ-B Chiller Unit Board

The Kouwa KMV‑75‑MOZ‑B is a chiller control board used in industrial cooling systems to regulate compressor and coolant flow. Common failure points for this class of boards include power supply/VRM faults, degraded I/O traces or connector corrosion, over‑temperature damage to ICs, and firmware corruption that can trigger error codes such as EA on the tuner display. First‑check diagnostics should verify 24 V DC input voltage and ripple, visually inspect for burnt components or loose solder joints, and review any displayed fault codes against the Kouwa service manual. If power is stable and no obvious physical damage is found, proceed to isolate the board from the chiller loop and perform a short‑circuit test on the main outputs before re‑installing.[oss-gpt-20b]

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