Hitachi RAS-(4-12)HNP(1)(E) - Page 183

6 Optional functions
169
SMGB0087 rev.0 - 12/2013
6
N O T E
• Thisisanauxiliaryfunctiontoprotecttheunitfromsnow.Insnowyregions,makesuretoprotecttheunitwithasnow-
preventionroof,fenceorsnow-preventionhood(Field-Supplied),etc..Otherwise,abnormalvibrationsduetoimbalan-
cedpropellerfanwillbecaused.
• Ifthefanmotororfancontrollerfailduringtheintermittentoperationofoutdoorfanmotor,stopalltheoutdoorfanmotor
tosuspendtheoperation.Checkthealarmcodeanddealproperlywiththefailurenexttimethecompressorisoperated.
• WhensettingthesnowsensorswitchforIntermittentOperationofOutdoorFanMotor,makesurethatthecontinuous
operatingtimeis30secondsormore.Alsotheintermittentoperationofoutdoorfanmotorintervalsshallbeatleast10
minutes.Otherwise,malfunctionoftheoutdoorfanmotorswillbecausedbyfrequentstart/stop.
D A N G E R
• Becauseofthissetting,theoutdoorfancanoperateevenwhiletheoutdoorunit(compressor)stops.
• Displayanoticetothateffectonareadilyvisiblepartoftheunitbody,inordertoavoidinjuriescausedbyan
unintendedoutdoorfanoperation.
d. Forcedstoppage(4/5)
(4)-RAS-(2.0-2.5)HVP1 / RAS-3HVNC1
(5)-RAS-3AVHNP1E / RAS-(4-12)H(V)N(P/C)(1)(E)
This is an input function that turns on when the switch receives a signal that causes the compressor and the fan motor of
the indoor unit to stop; stoppage code d1=10 displays on a remote-controlled when this option turns on. If the switch of this
function is disconnected it becomes available again.
Connect the cabling and use the materials as shown in”6.1.1Availableports”.
e. Currentcontroldemand(5/6/7/8/9/10)
(5,6,7)-RAS-(2.0-2.5)HVP1 / RAS-3HVNC1
(6,7,8,9)-RAS-(3.0-6.0)H(V)NP1E / RAS-(8.0-12.0)HN(C/P)(E)
(6,7,8,9,10)-RAS-(4.0-6.0)H(V)C1E
This is an input function that turns on when it detects that the frequency of the compressor reaches 60%, 80% or 100% for
RAS-(2.0-2.5)HVP1 / RAS-3HVNC1, 60%, 70%, 80% or 100% for RAS-(3.0-6.0)H(V)NP1E / RAS-(8.0-12.0)HN(C/P)(E)
and 40%,60%, 70%, 80% or 100% for RAS-(4.0-6.0)H(V)C1E
The frequency of the compressor is determined when the maximum current reaches the established limit.
Connect the cabling and use the materials as shown in “6.1.1Availableports”.
If the running current of the outdoor unit exceeds the maximum limit, the unit changes to the thermo-OFF condition. Stop-
page cause code “10” will appear. When the input terminal is opened during the demand current control, the control of the
input terminal is reset.
N O T E
Iftheinputterminalsareopenedbyatimer,etc.on-siteandthedemandcontrol(ON/OFF)issetwithonlytimeconditions,
itisrecommendedtosetthetimeaccordingtotheload,nottheconstantsettingtimeallthroughtheyear.Theminimum
setintervalfordemandorforcedstoppageshouldbe30minutesinconsiderationofthecompressor’sstart/stopfrequency
andenergy-saving.