4-288
Range
【0】: Disable
【1】: Warning
【2】: Fault
【3】: Fault & Restart
The hydraulic application can detect insufficient water in the tank resulting in low suction via HVAC
function. User can select the reaction of low suction (23-58) to run command. Low suction is detected by
parameter 23-54. Refer to Fig.4.4.115 for the process of low suction.
PID Error Level
23-56
Reaction
of Low
Suction
23-58
Detection
Time
23-55
PID Error
PID Error
Output Current
Detection of
Output Current
23-57
Output Current
Both of Two
PID Enable
Figure 4.4.115 Diagram for the process of low suction
When 23-54=0, detection function of low suction is disabled.
And refer to Table 4.4.19 for the detection logic of parameter 23-54 to select PID error of output current as
the detection signal.
Table 4.4.19 the detection logic of low suction
23-54
Detection Signal
PID Error Output Current
1
1 0
2
0 1
3
1 1
The detection level is required to be set by PID error level of low suction (23-56) and output current signal
(23-57) after selecting the detection signal.
The state of low suction experiences the detection time of low suction (23-55); when it is over the detection
time, low suction is active.
The reaction of low suction (23-58) is set by user to act. Refer to Table 4.4.20 for the detection signal of
water used.
When 23-58=3, refer to the instruction of parameter 07-01~07-02. Set fault auto-restart time by parameter
07-01 and the maximum number of fault auto-restart attempts is 10 by parameter 07-02.
Table 4.4.20 Detection signal of water used
23-58
Inverter Status Keypad Signal Error Signal
0
Continous Running None None
1
Continous Running
LSCFT(Flash) Warning of Low Suction
2
Stop
LSCFT
Jump to Error for Low
Suction
3
Stop and Restart
LSCFT
Jump to Error for Low
Suction and Restart
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