[Cause]
Material pressure is too low on the supply side. Usually, one of the following conditions exists.
1. The supply line (hose, etc.) has come off.
2. The low pressure limit setting is too high.
3. Low pressure limit time setting values are too short.
[Countermeasure]
Repair of supply pipes. Sets the low pressure limit to the appropriate value. Sets the low pressure limit time to the appropriate value.