Hitachi RAS-25QH1 Technische Information Seite 101

CHANGING THE NUMBER OF UNITS TO BE OPERATED
@The following shows the operation status when the number of units to be operated is changed from 2 to 1, thermostat off, 1, 2 and then operation
stop.
[Cooling]
Cooling output [7
Tums on
i for cooling i
®
=) Turns on
${ for heating
Outdoor fan
Balancing for 3 minutes TSKTH1L 1 Balancing for 3 minutes
———
,@ Start sequence
t
Compressor
rotation speed
SDRCTI
' g 80s >
<TD control + AN correction + distribution controi>+ '
oon oo OO + AN correction + ciginoution control) feeeeeeals
PSTARTH
woe ec ee nn lS et 1 ww ee ne ee eee eee ee
1
1
1
r
]
'
1
t
a
t
'
1
1
1
Expansion valve
<TD control + 4.N correction + distribution contro!) __1 1 fQutdoor temp
2-4---4-4------
i
. <TD control + AN correction + distribution contro!)
'
1
'
'
2 to 1 unit Thermostat off 1 unit to be operated 1 to 2 units Operation stopped
Turns on
for heating
Outdoor fan
t Balancing for 3 minutes
Compressor MMAXT
rotation speed
S ne a
' 80s
ne en eee ae ee See CTD control + AN correction + distribution control?! ot
f
3
4
;
'
t
'
i
'
TOutdoor temperature & 40°C 1
CP ee ee RT ee Oe eg re eT ee ee ee ee Fe ECE a ent eT eee te ee ee Be ee ere ne: Sey eo
1 '
'
'
1
Expansion valve
A
2 to 1 unit Thermostat off 1 unit to be operated 1 to 2 units Operation stopped
% - See other sections for details of expansion valve TD contro!, AN correction and distribution control.
* CMAX1, CMAX2, WMAX1, WMAX2, TSKTM1, SDRCT1, PSTART, PSTARTH and PCLOSH are EEPROM data.
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