Ecodan® Air Source Heat Pump
This guide has been produced in additional to the main home owner manuals. It will enable the end-user to quickly understand and
set-up the main functions of the unit. The Ecodan® unit is an air-source heat pump it is a highly efficient way of providing heating
and hot water for your home.
Although two modes are available with the Ecodan® unit (space heating and hot water), the hot water demand will always be met
first. The need for both services will vary from one home to another.
Thermostats and timers are used for timing purposes and supplied by the installer, they work in conjunction with the Mitsubishi
PAR-W21MAA controller. This is used for setting up the heating parameters during commissioning. The diagrams below show the
display features and keypad operation. Please note not all display features and buttons are used within this quick reference guide as
this is just used as a base to work from. For further explanation please refer to the main homeowners guide.
Identifies the current operation
Shows the operating mode, etc.
* Multi language display is supported.
"Centrally Centralised" indicator
Indicates that operation of the remote
controller has been prohibited by a master
"Timer is Off" indicator
Indicates that the timer is off.
Shows the target temperature
Set Temperature buttons
Timer Menu button
(Monitor/ Set button)
Mode buttons (Return button)
Set Time button
Quick Start-up Guide
Day of the Week
Shows the current day of the week
Shows the current time, unless the simple
or Auto Off timer is set.
If the simple or Auto Off timer is set,
For purposes of this explanation, all parts of the display are shown. During the actual
operation, only the relevant items will be displayed.
PUHZ-HW140VHA-BS / YHA-BS
Indicates if the time is set ON/OFF
Indicates that remote controller buttons
have been locked.
The indicator comes on if the correspond-
ing timer is set.
Comes on when error occurs.
Shows the current water temperature
Power On indicator
Indicates that the power is on.
Setting change button
( Enter button)
Test run function is not available with this FTC unit
Self check (clear) button