Service And Maintenance; Basic Troubleshooting - Mitsubishi Electric ecodan PUHZ-W50VHA2 User Manual

Service & Maintenance
The Ecodan must be maintained on an annual basis. A maintenance check sheet is supplied to all Accredited
Ecodan Installers who attend the training.
The basic requirements are:
Clean the outdoor heat exchanger
Visual inspection for oil or leaks
Check the integrity of the pipework insulation
Check for loose electrical connections
Check compressor operating current

Basic Troubleshooting

Below is a list of basic problems and actions.
For a full list of Ecodan fault codes, synopsis and remedial actions please consult the relevant service manual
available to download from www.mitsubishielectric.co.uk/domesticheating
Water does not heat well
Water or vapour is emitted from the outdoor unit
The operation indicator does not appear in the
remote controller display
When restarting the outdoor unit soon after stopping
it, it does not operate even though there is a demand
from the control equipment
display
An error code appears in the remote controller
display
For troubleshooting issues regarding the cylinder please consult the installation/service manual of the relevant
SERVICE & MAINTENANCE
Clean the filter of water piping. (Flow is reduced when the filter
is dirty or clogged.)
Check the temperature adjustment and adjust the set
temperature.
Make sure that there is plenty of space around the outdoor unit.
During the heating mode, water may form and drip from the
heat exchanger of the outdoor unit.
During the defrosting mode, water on the heat exchanger of the
outdoor unit evaporates and water vapour may be emitted.
Turn on the power switch. Will appear in the remote controller
display.
Wait approximately 3 minutes. (Operation has stopped to
protect the outdoor unit.)
The initial settings are being performed. Wait approximately 3
minutes.
If the remote controller is not only for FTC, change it.
The protection devices have operated to protect the FTC and
outdoor unit.
Consult the error code section of the relevant service manual
or call the technical support helpline on 0870 3000 300 for
assistance.
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