Mitsubishi Electric EHGT17D-YM9ED Service Manual page 22

8-5. Service Menu
The service menu provides functions for use by installer or service engineer. It is NOT intended the home owner alters settings within this menu. It is for this reason
password protection is required to prevent unauthorised access to the service settings.
The factory default password is "0000".
Follow the procedure described in General Operation for the set up operation.
The service menu is navigated using the F1 and F2 buttons to scroll
through the functions. The menu is split across 2 screens and is
comprised of the following functions;
1. Manual operation
2. Function settings
3. Thermistor adjustment
4. Auxiliary settings
5. Heat source setting
6. Pump speed
7. Heat pump settings
8. Operation settings
9. Energy monitor settings
10. External input settings
11. Thermo ON output
12. Commissioning wizard
13. Running information
14. Thermistor reading
15. Summary of settings
16. Error history
17. Password protection
18. Manual reset
19. SD card
Many functions cannot be set whilst the heat pump unit is running. The installer should turn off the unit before trying to set these functions. If the installer
attempts to change the settings whilst the unit is running the main remote controller will display a reminder message prompting the installer to stop operation
before continuing. By selecting "Yes" the unit will cease operation.
<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 FTC.
►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 FTC will resume control of the part.
Manual operation and heat source setting cannot 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 the last operation.
<Function settings>
Function Setting allows the setting of auto recovery after power failure.
1. From the service menu use F1 and F2 to highlight Function Setting.
2. Press CONFIRM.
3. Ensure the Ref address and unit number are displayed to the right.
4. Press CONFIRM.
5. Use F3 and F4 to highlight either 1/2/3 (see below).
6. Press CONFIRM.
Setting
Auto recovery after power failure
*1 Approx. 4-minute delay after power is restored.
OCH722A
Unit Mode Number
Grp Mode1 1 - Inactive
2 - Active *1
3 - NO FUNCTION
In this Installation Manual, instructions will be given only for the following
functions;
1. Manual operation
2. Auxiliary settings
3. Heat source setting
4. Operation settings
5. Energy monitor settings
6. External input settings
7. Password protection
8. Manual reset
Information on the other functions can be found by consulting the service manual.
Selected
Manual operation menu screen
22
Running Error
indication