Hitachi RAS-4.0TNESNH1 - Control Logic Description; Fan Operation Logic; Compressor and Mode Control Logic

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22) Tempe
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33) Indoor f
Inn
Inn
igh, (medi
he auto fa
1 is indoo
CCompress
OO
WW
shh
p.
OOutdoor fa
OO
SS
ww
DD
byy the rule
ool logic
.1 Fan Onlly Mode
Outdoorr
rrature sett
aan can be
Mode .2 Cooling
door fan rrunning rul
cooling mmode, indo
uum), low a
n:
rr room te
oor and outd
nce the coompresso
hen indooo
ut off. Whh
nn running r
nce the ouutdoor fan
ingle outdoo
ill regulatee
ouble outddoor fan: If
s, and th
fan and coompresso
ing functi
es:
or fan run
nnd auto.
oor fan ru
rr starts up,
r room temmp.T1 is l
en T1 is hhigher tha
ules:
start up, it
or fan: Firrst, it will r
the speedd by the o
ddescriptioon
rr stop.
set to highh/medium/l
mmperature. TT
it will follo
nn Ts+1, the
will follow
uun in an in
it has twoo
ee downer ffan speed
oon is disaabled, and
ss all the timm
s is settingg
nnning ruless:
ww the belo
oower than TTs, the com
compress
the below
vvariable s
temperatuu
outdoor faans, the u
no settin
ow, but cann
e and thee
temperatture.
ww rules:
rules:
ppeed for a
uutdoor-coil re.
lower thaan the up
not be seet to auto.
speed caan be sele
pressor annd outdoo
or and outtdoor fan
ppper fan reggulates th
pper fan sp
g temperaature is
cted as
rr fan will
wwill start
sshort time;; Then it
ee speed
eed for
0
44
T1-Ts
High
Medium
Low