Mitsubishi Electric Ecodan EHSC-VM6D-CN Installation Manual page 50

5
System Set Up
Freeze stat function
Menu subtitle
Freeze stat function *1
Flow t.
Outdoor ambient temp. Minimum outdoor ambient temperature which freeze stat function will begin to operate,
*1 When the system is turned off, freeze stat function is not enabled.
*2 Flow t. is fixed to 20ºC and unchangeable.
Cold weather function
For extremely low outdoor ambient temperature conditions when the heat pump's capacity is restricted the heating is provided only by the electric booster heater. This
function is intended for use during extreme cold periods only. Extensive use of direct electrical heaters ONLY will result in higher power consumption and may reduce
working life of heaters and related parts.
• Range of outdoor ambient temperature at which cold weather function starts
is −30°C to −10°C (default −15°C).
• System shall automatically return to routine operation. This will happen when
the outdoor ambient temperature rises above the selected temp. for this
specific mode of operation.
<Floor dry up function>
en
The Floor dry up function automatically changes the target hot water temperature
in stages to gradually dry concrete when this particular type of underfloor heating
system is installed.
Upon completion of the operation the system stops all the operations except the
Freeze stat. operation.
Functions
Floor dry up function
Flow temp. Flow temp. increase step
(increase) Increase interval
Flow temp. decrease step
Flow temp.
(decrease)
Decrease interval
Start & Finish
Max. target temp.
Target temperature
Max. temp. period
<Password protection>
Password protection is available to prevent unauthorised access to the service
menu by untrained persons.
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 seconds.
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.
<Manual reset>
Should you wish to restore the factory settings at any time you should use the
manual reset function. Please note this will reset ALL functions to the factory de-
fault settings.
21
Function/ Description
An operational function to prevent the water circuit from freezing when outdoor ambient temperature drops.
The target outlet water temperature at water circuit when operating in Freeze stat function. *2
(3 - 20ºC) or choose**. If asterisk (**) is chosen freeze stat function is deactivated. (i.e. primary water freeze risk)"
Symbol Description
Set the function to ON and power on the system using the main remote
a
controller, and the dry up heating operation will start.
b Sets the increase step of the target flow temperature.
c Sets the period for which the same target flow temperature is maintained.
d Sets the decrease step of the target flow temperature.
e Sets the period for which the same target flow temperature is maintained.
f Sets the target flow temperature at the start and the finish of the operation. 20 - 60
g Sets the maximum target flow temperature.
Sets the period for which the maximum target flow temperature is main-
h
tained.
Target flow temp.
(°C )
(h)
45
(g)
40
35
(b)
(c)
30
(f)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Days
• Disconnect wiring to external inputs of room thermostat, demand control, and
outdoor thermostat, or the target flow temperature may not be maintained.
Password input screen
Password verify screen
(d)
(e)
Option/Range Unit Default
On/Off — Off
+1 - +10 ºC +5
1 - 7 day 2
−1 - −10 ºC −5
1 - 7 day 2
ºC 30
20 - 60 ºC 45
1 - 20 day 5