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Mitsubishi Electric EHST20C- YM9EC - User Manual

Mitsubishi Electric EHST20C- YM9EC
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CYLINDER UNIT
EHST20 series
EHPT20 series
ERST20 series
HYDROBOX
EHSC series EHSD series
EHPX series ERSC series
ERSD series
MODE D'EMPLOI
Pour garantir une utilisation sûre et appropriée, lisez attentivement le présent mode d'emploi avant d'utiliser
l’ECODAN hydrobox duo et l’ECODAN hydrobox.
BEDIENUNGSANLEITUNG
Lesen Sie sich zur sicheren und korrekten Verwendung diese Bedienungsanleitung bitte sorgfältig durch,
bevor Sie das Hydraulikmodul inkl. Speicher und die Hydrobox verwenden.
FÜR NUTZER
OPERATION MANUAL
For safe and correct use, please read this operation manual thoroughly before operating the cylinder unit and
the hydrobox.
HANDLEIDING
Voor een veilig en juist gebruik moet u deze handleiding goed doorlezen alvorens de cilinder en hydrobox in
gebruik te nemen.
MANUAL DE INSTRUCCIONES
Para un uso correcto y seguro del hydrobox duo y del Hydrobox, lea este manual de instrucciones antes de su
utilización.
MANUALE DI FUNZIONAMENTO
Per un uso corretto e sicuro del dispositivo, leggere attentamente il presente manuale di funzionamento prima
di utilizzare l’hydrotank e l’hydrobox.
MANUAL DE FUNCIONAMENTO
Para uma utilização segura e correcta, é favor ler cuidadosamente este manual de funcionamento antes de
trabalhar com o cilindro e permutador de calor.
BRUGSVEJLEDNING
Læs venligst denne brugsvejledning grundigt inden betjening af i tank modulet (unit) og hydroboksen.
ANVÄNDARMANUAL
För säker och korrekt användning, var god läs denna användarmanual noggrant innan du använder i cylindertanken
och hydroboxen.
BRUKSANVISNING
Les denne bruksanvisningen nøye før du bruker sylinderenheten og hydroboksen for å sikre trygg og riktig
bruk.
KÄYTTÖOPAS
Turvallisen ja asianmukaisen käytön varmistamiseksi lue tämä käyttöopas huolellisesti ennen varaajayksikön
ja hydroboxin käyttöä.
KÄYTTÄJÄLLE
FOR BRUKEREN
FOR USER
POUR LES UTILISATEURS
VOOR DE GEBRUIKER
PARA EL USUARIO
PER L’UTENTE
PARA O UTILIZADOR
TIL BRUGER
FÖR ANVÄNDAREN
English (EN)
(RU)
Español (ES)
Italiano (IT)
Português (PT)
Dansk (DA)
Svenska (SV)
Norsk (NO)
Suomi (FI)
Deutsch (DE)
Français (FR)
Nederlands (NL)

Для безопасного и корректного использования внимательно прочитайте эту инструкцию по эксплуата-
ции гидромодулей.


NÁVOD K OBSLUZE
V zájmu bezpečného a správného používání si prosím pečlivě prostudujte tento Návod k obsluze, dříve než
začnete zásobníkový modul a hydromodul uvádět do provozu.
Pro provozovatele
Polski (PL)

Warunkiem bezpieczeństwa i poprawności użytkowania modułu wewnętrznego z wbudowanym i bez
wbudowanego zasobnika CWU jest uprzednie uważne przeczytanie niniejszej instrukcji obsługi.


Questions and Answers

  • D
    Debra JonesAug 4, 2025
    Why is my Mitsubishi Electric EHST20C- YM9EC Heat Pump heating system not reaching the set temperature?
    • K
      Katelyn SmithAug 4, 2025
      If your Mitsubishi Electric Heat Pump's heating system isn't reaching the set temperature, check if a prohibit, schedule, or holiday mode is active. Adjust the settings as needed. Also, the room with the temperature sensor might be at a different temperature than the rest of the house, so consider repositioning the sensor. If you are using wireless control, check and replace the battery if needed.
  • D
    daviscynthiaAug 8, 2025
    Why isn't my Mitsubishi Electric Heat Pump cooling system reaching the set temperature?
    • M
      Miranda RaymondAug 8, 2025
      If your Mitsubishi Electric Heat Pump's cooling system isn't cooling down to the set temperature (ONLY for ERSC(D) and ERST20C(D) models), it could be due to a delay at the start of cooling mode to protect the outdoor unit when the water in the circulation circuit is unduly hot. This is normal operation. Also, when the outdoor ambient temperature is significantly low, cooling mode does not start running to avoid freezing of the water pipes.
  • M
    Melanie CarterAug 13, 2025
    What to do if an error code appears on my Mitsubishi Electric Heat Pump?
    • W
      wademichaelAug 13, 2025
      If an error code appears on your Mitsubishi Electric Heat Pump's main remote controller display, it indicates an abnormal condition reported by either the indoor or outdoor unit. Note the error code number and contact your installer for assistance.
  • B
    Brooke SanchezAug 17, 2025
    What to do if water discharges from the relief valves of my Mitsubishi Electric EHST20C- YM9EC?
    • R
      Rhonda RobinsonAug 17, 2025
      If water discharges from one of the relief valves of your Mitsubishi Electric Heat Pump, it means the system has likely overheated or is overpressurized. Immediately switch off the power to the heat pump and any immersion heaters, then contact your installer.
  • M
    Mary EvansAug 21, 2025
    Why is my Mitsubishi Electric EHST20C- YM9EC relief valve dripping?
    • S
      sparksmicheleAug 21, 2025
      If you notice small amounts of water dripping from one of the relief valves of your Mitsubishi Electric Heat Pump, dirt may be preventing a tight seal. Twist the valve cap in the indicated direction until you hear a click to release a small amount of water, flushing out any dirt. Be careful, as the released water will be hot. If the valve continues to drip, the rubber seal may be damaged and need replacing, so contact your installer.
  • B
    bullockjamesAug 26, 2025
    Why is the water cold at the taps with my Mitsubishi Electric Heat Pump?
    • C
      Christina WrightAug 26, 2025
      If you are experiencing cold water at the taps when using a Mitsubishi Electric Heat Pump with a DHW tank, first check your schedule settings and adjust them if necessary. If that's not the issue, it's possible all the hot water from the DHW tank has been used; ensure the DHW mode is operating and wait for the tank to reheat.
  • J
    Juan StokesAug 29, 2025
    Why is my Mitsubishi Electric EHST20C- YM9EC Heat Pump heating emitter hot in DHW mode?
    • G
      Gary JohnsonAug 29, 2025
      If the heating emitter is hot in DHW mode, causing the room temperature to rise with your Mitsubishi Electric Heat Pump, it may be because the 3-way valve has foreign objects in it, or hot water may be flowing to the heating side due to malfunctions.

Summary

1 Safety Precautions

2 Introduction

How the Heat Pump Works

Explains the heat pump cycle and Coefficient of Performance (COP).

4 Customising Settings for Your Home

Main Remote Controller Overview

Describes the main remote controller and its components.

DHW and Legionella Prevention

Controls domestic hot water heating and legionella prevention.

Service Menu Access

Accessing password-protected service settings.

5 Service and Maintenance

Troubleshooting Guide

Guides for diagnosing and solving common system problems.

Maintenance Schedule

Details annual servicing and periodic part inspection/replacement.

Mitsubishi Electric EHST20C- YM9EC Specifications

General IconGeneral
BrandMitsubishi Electric
ModelEHST20C- YM9EC
CategoryHeat Pump
LanguageEnglish

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