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Mitsubishi Electric · Mitsubishi Electric Ecodan FTC7 controller (PUZ-WM/WZ, PUHZ-SW) · Troubleshooting

Ecodan: water flow and the magnetic filter – what the installer checks for L9, L3, L6, LP

Summary (editorial)

Flow-related codes often come from a restricted water circuit. The manual describes adjustments and checks that are done by the installer.

✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.

From the manufacturer's documentation (English source wording, with page)

  1. Adjust pump speed so that flow suits the outdoor unit (Table 3.4.1)[1]
  2. Flow sensor minimum default 5.0 L/min[2]
  3. Strainer/magnetic filter protects parts from iron particles and contamination[3]
  4. Water leakage, magnetic filter / strainer blockage, pump function[4]
  5. Pump valves may be hot[5]
  6. PUZ-WM85 10.8–24.4 L/min[6]

⚠ Work on refrigerant circuits, mains electricity and PV DC wiring is for qualified technicians only.

The Polish page has more detail (plain-language explanation, safe checks, guides): Read in Polish →

Sources

Every statement has a footnote to the document and PDF page. “Quote verified” means the quote was found automatically in the text of that page.

  1. [1] Mitsubishi Electric Ecodan FTC7 PAC-IF081B-E / PAC-IF082B-E / PAC-IF083B-E – Installation Manual (DG79H200H02) , p. 7 official manufacturer document quote verified Adjust the pump speed setting so that the flow rate in the primary circuit is appropriate for the outdoor unit installed
  2. [2] Mitsubishi Electric Ecodan FTC7 PAC-IF081B-E / PAC-IF082B-E / PAC-IF083B-E – Installation Manual (DG79H200H02) , p. 7 official manufacturer document quote verified default 5.0 L/min
  3. [3] Mitsubishi Electric Ecodan FTC7 PAC-IF081B-E / PAC-IF082B-E / PAC-IF083B-E – Installation Manual (DG79H200H02) , p. 7 official manufacturer document quote verified Provide it as required to protect parts from damages caused by iron particles
  4. [4] Mitsubishi Electric Ecodan FTC7 PAC-IF081B-E / PAC-IF082B-E / PAC-IF083B-E – Installation Manual (DG79H200H02) , p. 33 official manufacturer document quote verified Magnetic filter / Strainer blockage
  5. [5] Mitsubishi Electric Ecodan FTC7 PAC-IF081B-E / PAC-IF082B-E / PAC-IF083B-E – Installation Manual (DG79H200H02) , p. 33 official manufacturer document quote verified Caution: The pump valves may be hot, please take care.
  6. [6] Mitsubishi Electric Ecodan FTC7 PAC-IF081B-E / PAC-IF082B-E / PAC-IF083B-E – Installation Manual (DG79H200H02) , p. 7 official manufacturer document quote verified PUZ-WM85 10.8 - 24.4