Password Protection - Mitsubishi Electric ecodan EHST20 Série Manuel D'installation

5
System Set Up
external input settings
From the service menu use F1 and F2 buttons to highlight External input settings
then press CONFIRM.
<demand control (in4)>
1. From the External input settings menu highlight Demand control (IN4).
2. Press CONFIRM.
3. The Demand control screen is displayed.
4. Press F3 button to select Heat source OFF or Boiler.
5. Press CONFIRM.
note: the selection of "OFF", whilst a signal is being sent to in4, forcefully
stops all the heat source operations and the selection of "Boiler" stops
operations of heat pump and electric heater and performs boiler op-
eration.
<Outdoor thermostat (in5)>
1. From the External input settings menu highlight Outdoor thermostat (IN5).
2. Press CONFIRM.
3. The Outdoor thermostat screen is displayed.
4. Press F3 button to select Heater or Boiler.
5. Press CONFIRM.
note: the selection of "Heater", whilst a signal is being sent to in5, performs
electric-heater-only operation and the selection of "Boiler" performs
boiler operation.

Password protection

Password protection is available to prevent unauthorised access to the service
menu by untrained persons.
1. From the service menu use F1 and F2 buttons to scroll through list until
is highlighted.
2. Press CONFIRM.
3. When password input screen is displayed use buttons F1 and F2 to move left
and right between the four digits, F3 to lower the selected digit by 1, and F4 to
increase the selected digit by 1.
4. When you have input your password press CONFIRM.
5. The password verify screen is displayed.
6. To verify your new password press button F3.
7. Your password is now set and the completion screen is displayed.
<resetting the password>
If you forget the password you entered, or have to service a unit somebody else
installed, you can reset the password to the factory default of 0000.
1. From the main settings menu scroll down the functions until Service Menu is
highlighted.
2. Press CONFIRM.
3. You will be prompted to enter a password.
4. Hold down buttons F3 and F4 together for 3 secs
5. You will be asked if you wish to continue and reset the password to default set-
ting.
6. To reset press button F3.
7. The password is now reset to 0000.
External input settings menu screen
Demand control screen
Outdoor thermostat setting screen
Password input screen
Password verify screen
Completion screen
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