Control functions
Figure 2-6 Fan speed bars
Via Modbus it is possible to force the fan to run with at least one fan speed. This is valid in all states except
the Off state where the fan will be turned off.
2.4.2 Mould protection
In order to minimise the risk of mould growth in the fan-coil unit it is possible to activate the mould
protection. When activated, the fan will run with at least one fan speed in all states to circulate air in the
room and minimise the risk of mould growth in the fan-coil unit.
NNoottee!! With activated mould protection the fan also runs in Off state.
2.4.3 Fan control settings
Parameter Description
16 Mould protection
0 = Not active
1 = Active
20 Fan control
0 = No fan control
1 = Fan is controlled by heat command
2 = Fan is controlled by cool demand
3 = Fan is controlled by both heat and cool demand
21 Number of fan speeds used
1 = 1 fan speed is used
2 = 2 fan speeds are used
3 = 3 fan speeds are used
Modbus register Modbus address Description
Holding register 34 0 = No fan speed active
1 = Fan speed 1 is active on DO FAN1
2 = Fan speed 2 is active on DO FAN2
3 = Fan speed 3 is active on DO FAN3
4 = Auto. Fan speed follows heat or cool demand according to the application.
Coils register 1 Minimum fan speed. The fan runs at least at speed 1, except in Off state.
0 = Not Active
1 = Active
Coils register 2 Mould protection
0 = Not active
1 = Active
Discrete register 5 0 = Fan speed 1 is not active
1 = Fan speed 1 is active
Discrete register 6 0 = Fan speed 2 is not active
1 = Fan speed 2 is active
Discrete register 7 0 = Fan speed 3 is not active
1 = Fan speed 3 is active
RCFD-230C manual, Rev. A 11
To Next Page
Loading...
Need help?
General
