Goodrive270 series VFD for fan and pump Basic operation guidelines
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Condition 2: The PID feedback value reaches the value specified by P96.06 (Soft padding cutoff
detection level).
Related parameter list:
Water pipe soft
padding function
Reference
frequency for soft
padding
Duration of
reference
frequency for soft
padding
Soft padding cutoff
detection level
The PID function is valid when the feedback
value is greater than the value of this parameter.
Range: 0.0–100.0%
5.5.23 Freezing protection
At low temperature, water freezing in the water tube damages the water pump. After protection
against freezing 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 the display temperature. If the full range is exceeded, the temperature is displayed as 0.
When you have set P96.10 to enable protection against freezing, 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 received after the protection has been activated, the
motor is stopped and automatic protection is disabled. Automatic protection can be enabled only
when the temperature is higher than the protection threshold.
AI/AO measured
temperature
Enabling freezing
protection
Protection against freezing:
0: Disable. 1: Enable
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