Goodrive270 series VFD for fan and pump Basic operation guidelines
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external use.
Automatic polling of water pump
After water supply PID1 is configured and the VFD is started, the VFD automatically adjusts the
number of running water pumps through PID1. For details about related function codes, see P94.
The VFD supports automatic polling. If P94.34 is set to a non-zero value, the VFD periodically starts a
motor that is not running and shuts down a motor that is running to ensure the run time of motor is
consistent, when the following conditions are met: There are motors that are not running, and the
running frequency of VFD is lower than P94.35. You can view motor run time through P89.24±P89.27.
Segmented water pressure
If you have purchased the optional LCD keypad, you can place batteries into the keypad to enable the
clock function. Then you can set working days through P92.04 and set start time and stop time of
working days through P92.05±P92.08. P95 can specify water pressure by time segment. Within a
specific time segment, the PID reference source is switched to the water pressure corresponding to
the time segment.
Soft padding
You can set P96.03 to 1 to enable soft padding. After the VFD is started, the motor runs at P96.04
(Frequency given by soft padding) for the time specified by P96.05 or until the PID feedback value
reaches P96.06 (Soft padding cutoff level), and then the PID takes over frequency control.
Water pump repair
When a motor needs repairing, you can set the input terminal function to 104±107 to lock the motor
and inform the VFD that the motor is unavailable. During repair, retain the wiring for
variable-frequency circulation, and only disconnect the wire between the motor and grid. If the VFD is
not informed of motor unavailability, the VFD still adds or reduces motors according to PID feedback,
which includes repeated actions.
Freezing protection
At low temperature, water freezing in the water tube damages the water pump. After freezing
protection is enabled, the motor automatically rotates to prevent against water freezing when the
ambient temperature reaches a specified value. The VFD provides the AI/AO temperature measuring
function, which supports PT100, PT1000, and KTY84. During use, select current output for AO,
connect one end of the temperature resistor to AI1 and AO1 and the other end to GND. P89.32
indicates display temperature. If the full range is exceeded, the temperature is displayed as 0.
When you have set P96.10 to enable freezing protection, if P89.32 (Measured temperature) is lower
than P96.12 (Freezing protection threshold), the freezing protection signal is activated, and the VFD
runs at P96.14 (Freezing protection frequency).
If the VFD is running, the signal is ignored. If a run command is received after the protection has been
activated, the protection is terminated and the run command is executed. If a stop command is
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