Toshiba GX9 ASD, Быстрый старт

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GX9 ASD Quick Start Guide 59
WARNING! — THE FOLLOWING STEP WILL START THE MOTOR!
Figure 28. Set the Maximum Threshold Value.
Figure 29. Set the Minimum Threshold Value.
DANGER
11. Set the system for normal flow and
ensure that all system valves are set
for normal operation.
12. Place the system in the Local mode
and press the Run key.
13. Click Next to continue.
The Motor/Pump combination
capacity is automatically calculated and displayed as the Maximum threshold. Normally,
no further adjustment is required for the Maximum threshold setting.
The Maximum threshold value may be adjusted, if required, at F918 . The Maximum
threshold setting ( F918 ) minus the F933 setting comprises the range of the Maximum
threshold zone.
14. Click Next to continue.
Maximum Threshold Zone
15. The Minimum threshold value setting
is typically above the electrical stall
of the motor, above the minimum
system pressure, above the manual
change plateau, and well below the
typical operating point of the system.
Click in the Minimum threshold field
and, using the Rotary Encoder ,
slowly decrease the Minimum
threshold value while observing the LED display.
If either of the conditions listed below should occur while decreasing the Minimum
threshold value, increase the Minimum threshold number until the condition is no longer
true to set the Minimum threshold:
• The motor stalls,
• The output frequency is greater than the setting of F505 , or
• The output frequency no longer changes with continued Virtual Linear Pump number
changes.
The Minimum threshold setting ( F917 ) plus the F919 setting comprises the range of the
Minimum threshold setting.
Minimum Threshold Zone