Service Menu - Mitsubishi Electric EHSD-MEC Installation Manual

5
System Set Up

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 two 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. Operation settings
8. Energy monitor settings
9. External input settings
10. Running information
11. Thermistor reading
12. Summary of settings
13. Error history
14. Password protection
15. Manual reset
16. SD card
Many functions can not be set whilst the indoor 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 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
Menu subtitle Function/ Description
Economy settings for Water pump stops automatically in certain period of time from when operation is
pump finished.
Delay Time before pump switched off*1
Electric heater To select "WITH booster heater (ON)" or "WITHOUT booster heater (OFF)" in
(Heating) Heating mode.
Delay The minimum time required for the booster heater to turn ON from after Heating
mode has started.
Electric heater (DHW) To select "WITH (ON)" or "WITHOUT (OFF)" booster heater or immersion heater
individually in DHW mode.
Delay The minimum time required for the booster heater or immersion heater to turn ON
from after DHW mode has started. (This setting is applied for both booster and
immersion heater.)
Mixing Running Period from valve fully open (at a hot water mixing ratio of 100%) to valve fully
valve closed (at a cold water mixing ratio of 100%)
control *2 Interval Interval (min) to control the Mixing valve.
Flow Minimum The minimum flow rate to be detected at Flow sensor.
sensor *3 Maximum The maximum flow rate to be detected at Flow sensor.
*1. Decreasing "time before pump switched off" may increase the duration of stand-by in Heating/Cooling mode.
*2. Set the Running time according to the specifications of the actuator of each mixing valve. It is recommended
to set the interval to 2 minutes that is a default value. With the interval set longer, it could take longer to
warm up a room.
*3. Do not change the setting since it is set according to the specification of Flow sensor attached to the
hydrobox.
<Heat source setting>
The default heat source setting is heat pump and all electric heaters present in the system to be operational.
This is referred to as Standard operation on the menu.
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
9. SD card
Information on the other functions can be found by consulting the service manual.
Selected
Manual operation menu screen
Auxiliary settings menu screen
Running Error
indication
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