Hitachi RAS-8-FSNM - TEST RUN PROCEDURE BY REMOTE CONTROL SWITCH

ENGLISH
2 Waitfor30seconds.
3 PushPSW1onPCBmorethan3seconds.
• Payattentiontothefollowingitemswhilethesystemisrunning.
aDonottouchanyofthepartsbyhandatthedischargegasside,
sincethecompressorchamberandthepipesatthedischargeside
areheatedhigherthan90°C.
bDonotpushthebuttonofthemagneticswitch(es).Itwillcause
aseriousaccident.
• Donottouchanyelectricalcomponentsforatleast3minutesafter
turningOFFthemainswitch.
• Checkthattherefrigerantpipingsettingandelectricalwiringsetting
areforthesamesystem,byoperatingtheindoorunitonebyone.
• If total unit insulation resistance is lower than 1 megohm, the
compressor insulation resistance may be low due to retained
refrigerantinthecompressor.Thismayoccuriftheunithasnotbeen
usedforlongperiods.
1 Disconnectthecablestothecompressorandmeasurethe
insulationresistanceofthecompressoritself.Iftheresistancevalue
isover1megohm,theninsulationfailurehasoccurredofother
electricalparts.
2 Iftheinsulationresistanceislessthan1megohm,disconnectthe
compressorcablefromtheinverterPCB.Then,turnonthemain
powertoapplycurrenttothecrankcaseheater.
Afterapplyingcurrentformorethan3hours,measureinsulation
resistanceagain.(Dependingontheairconditions,pipelength
orrefrigerantconditions,itmaybenecessarytoapplythecurrent
foralongerperiodoftime.)Checktheinsulationresistanceand
reconnectthecompressor.
• Iftheleakagebreakerisactivated,checktherecommendedsize.
? NOTE
• Conrmthateld-suppliedelectricalcomponents(mainswitchfuse,
fuse-freebreaker,earthleakagebreakers,wires,conduitconnectors
and wire terminals) have been properly selected according to the
electricaldatagivenintheTechnicalCatalogoftheunitandensure
thatthecomponentscomplywithnationalandlocalcodes.
• Useshieldedwires(≥0.75mm
2
)foreldwiringtoprotectelectrically
noise obstacle. (Total length of shielded wire shall be less then
1000m,andsizeofshieldedwireshallcomplywithlocalcodes.)
• Checktoensurethatpowersourcewiringisconnectedtotheterminal
boardcorrespondingtothecorrectvoltage.
11.1 TEST RUN PROCEDURE BY REMOTE CONTROL SWITCH

Turn ON the power source of the Indoor and Outdoor Units

Counting
number of
connected
units
05

Operation lamp

Set the TEST RUN mode by remote control switch.
Depress the “MODE” and the “ OK” switches simultaneously for
more than 3 seconds.
a. If “TEST RUN” and the counting number of the connected
units to the remote control switch (for example “05”) are
indicated on the remote control switch, the connection of
remote control cable is correct.→Go to 
b. If no indication appear or the number of the units indicated
is smaller than the actual number of the units, some
abnormalities exist.→Go to 

Remote Control
Switch Indication
Wrong Portions Inspection Points after Power Source OFF
No indication
• The power source of Outdoor Unit is
not turned ON.
• The connection of the remote control
cable is incorrect.
1 Connecting Points of Remote Control Cable terminal board of
Remote Control switch and indoor unit.
2 Contact of Terminals of Remote Control Cable
• The connecting wires of power supply
line are incorrect or loosened.
3 Connection Order of each Terminal Board
4 Screw Fastening of each Terminal Boards.
Counting number of
connected units is
incorrect
• The power source of Outdoor Unit is
not turned ON.
• The operating line wiring between
indoor unit and outdoor unit is not
connected.
• The connection of control cables
between each indoor units are
incorrect. (When one remote control
switch controls multiple units)
5 Dip Switch Setting on Printed Circuit Board
6 Connecting on the PCB
7 This is the same as item  1, 2 , and 3.
Back to  after checking

Select TEST RUNNING MODE by depressing MODE Switch (COOL OR HEAT)
COMMISSIONING
PMML0390B REV.0 - 11/2015 - P5416649
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