Mitsubishi Electric ecodan PUHZ-W50VHA2 User Manual page 47

Locking Function
To ensure that the Ecodan is only operated by signals from the two channel programmer it is necessary to undertake the
following procedure and lock the controller as part of the commissioning stage. When this function is activated it is not
possible to unnecessarily operate the Ecodan when there is no demand for either central heating or hot water.
1
2
3
4
Limit Temp
Function
5
Off
Factory Settings
PAR-W21MAA
Hot Water mode
50°C
Throughout the system set-up buttons on the controller are referenced by letters and displays by numbers ; this key can be found on page 41
SYSTEM SET -UP
Normal Display
D E
Change Language
E
Function Selection
G
G G
Select
Mode
D
D
Locking
Function 1
Recommended Settings
55°C
Table 2.9
44
Step 1:
Hold down buttons D and E for 2 seconds.
This activates the controller
Step 2:
Press button E. The language is preset to English.
See full manual if you wish to change this setting.
Step 3:
Press button G to advance
Step 4:
At this stage a choice of 3 screens will
Locking
appear, each press of button G will
change the function. You will need to
Function
button D to move forward
D
G
Locking
Function 2
Step 5:
At this stage a choice of 3
screens will appear, each
press of button D will
change the function. You
will need to select locking
function 2 to totally disable
the PAR-W21MAA.
Finish:
Press button A. Hold down but-
tons D and E for 2 seconds to
return to original screen.
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