Siemens PUMA V400/M Operation Manual page 21

(12) Coolant switch
When pressing the coolant ON switch in machine ready state, internal LED in coolant
ON switch is ON and the coolant pump of the machine will be activated.
Working coolant pump will be stopped the following condition. Also LED is OFF when
coolant pump stops it's working.
1) Internal LED is ON by the coolant ON switch, press this switch one more time and
LED is OFF.
2) When the OFF command is executed by M-code (M09) in MDA or AUTO mode.
3) Internal red LED in coolant OFF switch is ON by pressing the coolant OFF switch.
4) Machine data that turn OFF the coolant is set to 0 when opening the door.
If coolant ON is commanded by M-code while the internal LED in coolant OFF switch is
ON, coolant pump will not work and the commanded M-code cannot complete. In this
case, there is a function to complete automatically by the setting of machine data.
When coolant ON is commanded by M-code, be sure to turn OFF the red LED in
coolant OFF switch for operating the coolant pump.
<Switch operation for high pressure coolant (option)>
If high pressure pump is installed with normal pump by the demand of customer, high
pressure coolant pump will be activated by another M-code in automatic operation.
It depends on machine data setting value whether coolant ON switch is available only
to normal coolant pump or available to normal and high pressure coolant pump in
manual mode.
However, if pressing the coolant OFF switch, it makes high pressure and normal
coolant pump stop simultaneously.
This switch is provided ON/OFF switch.
Coolant ON switch on operation panel can be activated
regardless of the machine mode.
MAIN OPERATION PANEL | 13