TECO-Westinghouse F510 Series, Instruction Manual, Page: 352 / 444

4 - 280
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
Note: Low suction state is detected by if the signal is higher than PID error level or lower than output
current.
23- 59
Source of HVAC Pressure Command *3
Range
【
0
】
: Set by 23-47
【
1
】
: Set by AI
*3: It is new added in inverter software V1.4 .