Service manual

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124
If you would like to choose frequency conversion repetition mode, F3.31 must
be set to 0. The board control is ineffective if F3.20 is set to 0, while F3.20 is set
to other values the board will work according to description of the parameter.
b. frequency conversion fixed mode
If you would like to choose frequency conversion fixed mode, F3.31 must be
set to 1 or 2. The board control is ineffective if F3.20 is set to 0, while F3.20 is set
to other values the board will work according to description of the parameter.
(4) Automatic switch function
Automatic switch function is only effective in frequency conversion repetition
mode(F3.31 is 0). The system will switch automatically like pump adding when
switch time is up and pumps are in stable running state (no pump adding or
reducing). For example, before switch board driving mode is 2G—3G—4B while
it is 3G—4G—1B after switch. If drived pump quantity reaches the maximum,
automatic switch function is ineffective even though switch time is up.
10.6.5 Function parameter setting for constant pressure water supply
For details of function parameter for constant pressure water supply, please see
detailed description of F3 group (Closed-loop run control parameter group) in
Chapter 6. Please notice that accelerating or decelerating time can’t be longer than
switch judging time for pumps. After wire as the figure, F5.00 must be set to 33
(external interruption input) and F5.01 must be 20 (closed-loop ineffective) in
order to avoid water pressure fluctuation when pump adding or reducing. For
detailed parameter setting information, please see below table.
function
code
name set range explanation
F0.08 Acce time 1
Set according to actual
situation
F0.09 Dece time 1 Same as above
F0.10 Upper limit freq. Same as above
F0.11 Lower limit freq. Same as above
F3.16 The value of sleep frequency valve Same as above
F3.17 The value of wake pressure valve Same as above
F3.18 The time of delay sleeping time Same as above
F3.19 The time of delay waking time Same as above
F3.20
Constant pressure
water supply mode 1
selection
0:inverter works in
one-drive-two water
supply mode
1:constant pressure
water supply board
acts in one-drive-two
mode
2:constant pressure
water supply board
acts in one-drive-three
This parameter needs to work with F3.31
to make constant pressure water supply
control effective ( for details please see
description in 10.6.4)