11.1.4 Overload protection control
1 Level of detection:
• A malfunction is detected when the output current increases above 105% of the maximum output current.
2 Function:
•
When the output current increases above 105% of the maximum output current, and the frequency decrease, an
overload signal is transmitted sent to PCB1. For 10 seconds after the decrease lower than 88% in output current,
the compressor maximum frequency is limited to the specified value. However, if the frequency command is smaller
than the maximum value, the operation is carried out as per the command.
3 Cancellation of the protection function:
• After the described operation, is performed for 10 seconds, this control is cancelled.
11
Electrical checks of the
main parts
333
SMGB0065 rev. 1 - 12/2010
11
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