4P642495-1A
–
2022.02
Page
34
of
52
Note: The BMS needs to copy input register value:
32001 (1-
00)… bit 10
-9-8) to this holding register
7
Fan control flag 0: no fan
control
6: fan
control
In case fan control: This register has to be set to value 6
In case no fan control: this register has to be set to value
0
For HRV:
“fan control flag”
has no impact on ventilation
rate control bit 14-13-12
6
5
4
3
-
2
-
1
-
0
On/off
0: Off
1: On
Note: The BMS needs to copy input register value: value:
32001 (1-
00)… bit 0)
to this holding register
Holding register
VRV
Sky
-air
H
RV
Sp
lit
VRV h
yd
ro
b
o
x
LT
&
H
T
Air cu
rta
in
s
ERQ
con
tro
l b
o
x
H
eat
in
g
Ap
p
lie
d
Cooling/ Heating
Operation mode
Depending on indoor unit capability
(fan only/Cool/heat/auto/dry)
* for split: no fan only mode
* for VRV hydrobox LT&HT & heating
& applied:
Only Heating&Cooling
O
O
-
O*
O*
O
O
O*
O*
Filter sign
Filter sign reset of indoor units
* Air curtain:
CYV models: not available
CYQ models: available
O
O
O
-
-
O*
-
O
-
42002 (1-00)
42005 (1-01)
.. (step of 3)
42191 (4-15)
Bit
Description
Meaning
15..8 -
7
Filter sign reset
0: none
15: reset
Attention
: After reset, set to value 0 again. Otherwise
filter sign will never appear again.
6
5
4
3
Operation
mode setting
0 till 7
0: Fan, 1: Heating, 2: Cooling, 3: Auto
4:Ventilation,5:-,6:Setpoint/Dependent ,7: Dry
(note 6: Set point/Dependent is used when the indoor
unit is not cool/heat master)
Note: “illegal data” is returned in case not possible to
set the value on the unit. (see chapter 2.2.1 Function
format)
(e.g.
Set holding register to “1:heating” value to a unit
that cannot be put to heating)
(possible to check register 31001 for fan / cooling /
heating / auto / dry mode capability)
Note: The BMS needs to copy input register value:
32002 (1-
00)… bit
3-2-1-0 to this holding register
2
1
0
