Hitachi YUTAKI Series - Operating

Controller pack
Service Manual
142
System MMI Pack (Room unit and RF receiver)
SMGB0066 rev.0 - 12/2009

note
To run the adjusted program select the AUTO mode. -

TheHitachiroomunithas6periodseachdaythatcanbeprogrammed,butyoumaynotneedalloftheseswitchpointsforyour
heatingrequirements.Therefore,anyperiodfrom2to4canberemovedfrom(orreturnedto)theheatingprogramprole.
To disable or enable time periods:
To disable unwanted periods go to the desired period ( 2 to 6 ) using the PROGRAM 
or buttonstonavigate,
ensurethecorrectperiodishighlightedwiththeashingsquaresymbol.Pressandholdthe
button for at least 2
seconds and the display will indicate the period has been removed from the program.
Toenableperiodsagainfollowthesameprocedureasabove,navigatingtothealreadydisabledperiod.Toenable
this period again press and hold the
button for at least 2 seconds.


TheHitachiroomunitcanoperateinthreedifferentmodes:Automatic,ManualorOff.Tosettheoperatingmodepresseither
of the , or buttons.ThescreenindicateswhichmodeiscurrentlyactivebydisplayingAUTO,MANorOFF.
•AUTOMATIC(
) mode sets the Hitachi room unit to follow the built-in temperature program (default or personalised).
Operating the Hitachi room unit in this mode is the best way to maintain a high level of temperature
comfort whilst maximising your energy savings.
•MANUAL(
)modesetstheHitachiroomunittoactasasimplethermostatwithaxedsetpointthroughouttheday.
Thesetpointcanbeadjustedfrom5°Cto35°Cbyusingthe
or buttons. The Hitachi room unit
will continue to maintain this temperature until another operating mode or temperature is selected.
•OFF( ) mode sets the Hitachi room unit to control to a minimum temperature setting of 5°C (default) that acts as a
frost protection measure for your home.

•TemperatureOverride
During normal operation (AUTO (
)ormode)theprogrammedtemperaturecanbeadjustedmanuallybypressingthe
or buttons or the button.The‘target’temperaturewillbedisplayedandashfor5seconds-duringthistimethe
or buttons can be used to modify the set value. Note: This temperature override is cancelled at the next programmed
temperature change.
•TemperatureEnquiry
WhentheHitachiroomunitisconguredtocontroltheroomtemperaturedirectlyitwilldisplaythecurrentroomtemperature.
Toreviewtheprogrammed‘target’temperature(thetemperaturewhichtheHitachiroomunitistryingtomaintain)press
the
button.This‘target’temperaturevaluewillbedisplayedashingfor5secondsbeforereturningtothecurrentroom
temperature value.