Specifications

4P357732-1 – 2014.04 Page 39 of 58
(note: Fan control flag must be set to value 6)
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
HRV Split VRV hydrobox LT & HT Air curtains ERQ control box Heating Applied
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