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Troubleshooting - Mitsubishi Electric ecodan Quick Start Manual

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Troubleshooting

The following is to be used as a guide to possible problems. It is not exhaustive and all
serious problems should be investigated by the installer or another competent person.
Users should not attempt to repair the system themselves. At no time should the
system be operating with the safety devices by-passed or blocked up.
Cold water at taps
Hot water may be scheduled off: Please check schedule settings and alter
if necessary.
All the hot water from tank may be used: Ensure DHW mode is operating and
wait for tank to re-heat.
Heat pump or electric heaters not working: Contact installer.
Water discharges from one of the relief valves
The system has overheated/over pressurised: Please switch off power to the heat
pump and any immersion heaters then contact installer.
Small amounts of water drip from one of the relief valves
Dirt may be preventing a tight seal in the valve: Please twist the valve cap
in the direction indicated until a click is heard. This will release a small amount
of water flushing dirt from the valve. Be very careful, the water released will
be hot. Should the valve continue to drip, contact installer as the rubber seal
may be damaged and need replacing.
Noisy pipework
Air may be trapped in the system: Try bleeding radiators (if present) using
a radiator key, if the symptoms persist contact installer.
Heating system does not get up to set temperature
Prohibit, schedule or holiday mode selected: Check settings and change
as appropriate. Incorrectly sized radiators: Contact installer.
The room in which the temperature sensor is located is at a different
temperature to the rest of the house: Reposition the temperature sensor
to a more suitable room.
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