Manual Operation - Mitsubishi Electric Ecodan EHST20 serie Para El Instalador

5
System Set Up

Manual operation

During the filling of the system the water circulation pump and 3-way valve can
be manually overridden using manual operation mode.
When manual operation is selected a small timer icon appears in the screen. The
function selected will only remain in manual operation for a maximum of 2 hours.
This is to prevent accidental permanent override of the FTC4.
1. From the service menu use F1 and F2 buttons to scroll through list until
Manual Operation is highlighted.
2. Press CONFIRM.
3. Manual operation menu screen is displayed.
4. To activate manual operation press the function button under the desired part.
►Example
Pressing F3 button will switch manual operation mode ON for the main 3-way
valve. When filling of the DHW tank is complete the installer should access this
menu again and press F3 to deactivate manual operation of the part. Alternatively
after 2 hours manual operation mode will no longer be active and FTC4 will
resume control of the part.
nOte: Manual operation and heat source setting can not be selected if the
system is running. A screen will be displayed asking the installer to
stop the system before these modes can be activated.
the system automatically stops 2 hours after last operation.
Auxiliary settings
This function is used to set the parameters for any auxiliary parts used in the
system.
From the service menu use F1 and F2 buttons to highlight Auxiliary settings then
press CONFIRM.
<economy settings for pump>
1. From the Auxiliary settings menu highlight Economy Settings for water
circulation pump.
2. Press CONFIRM.
3. The economy settings for water circulation pump screen is displayed.
4. Use button F1 to switch the water circulation pump ON/OFF.
5. Use buttons F3 and F4 to adjust the time the water circulation pump will run.
(3 - 60 mins)
<electric heater (Heating)>
1. From the Auxiliary settings menu highlight Electric heater (Heating).
2. Press CONFIRM.
3. The Electric heater (Heating) screen is displayed.
4. Press F1 button to switch the function ON/OFF.
5. Use F3 and F4 buttons to adjust the time period of heat pump only operation
before the booster heater will assist in space heating. (5 -180mins)
<electric heater (dHW)>
1. From the Auxiliary settings menu highlight Electric heater (DHW).
2. Press CONFIRM.
3. The Electric heater (DHW) screen is displayed.
4. Press F1 button to switch the function ON/OFF.
5. Use F3 and F4 buttons to adjust the time period of heat pump only operation
before the booster heater and the immersion heater (if present) will assist in
DHW heating. (15 -30mins)
Being selected Being running
Error indication
Manual operation menu screen
System off prompt screen
Auxiliary settings menu screen
Economy settings for pump screen
Electric heater (Heating) screen
Electric heater (DHW) screen
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