75
pump running.
2. Operation
In case of the pressure is too high, vent it at first. Click
and wait the vent finishes, then refer to Figure 28.
Follow the steps in Figure 28 to prepare for the liquid replacement.
Click
button to drain, click
button to stop draining.
Figure 28 Prepare for liquid replacement when vented
4.5.7 Piston maintenance
1. Function introduction
This function is a preliminary treatment when the piston has malfunction. Perform the piston maintenance regularly to
keep it in good condition, so as to extend the unit’s life; Set the notification for due date in the setting, the default interval is
30 days.
2. Operation
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