8588

Common Causes

• Low coolant level in the tank starving the pump
• Clogged coolant pipe, filter or nozzle restricting flow
• Flow/supply sensor switch set to the wrong position
• Faulty flow sensor switch (stuck ON or never actuating)

Troubleshooting Steps

1. 1Read the code number shown with the alarm: code None = Coolant flow sensor did not turn ON within the monitor time (supply sensor type machines); code 1 = Coolant 1 flow not detected within the coolant 1 flow alarm monitor time; code 2 = Coolant 2 flow not detected within the coolant 2 flow alarm monitor time; code 3 = Coolant 3 flow not detected within the coolant 3 flow alarm monitor time; code 4 = Coolant 4 flow not detected within the coolant 4 flow alarm monitor time; code 5 = Coolant 1 flow switch stayed ON past the set time while coolant 1 outputs were OFF; code 6 = Coolant 2 flow switch stayed ON past the set time while coolant 2 outputs were OFF; code 7 = Coolant 3 flow switch stayed ON past the set time while coolant 3 outputs were OFF
2. 2Read the code to identify the affected line: 1-4 = coolant 1-4, 5-7 = flow switch stuck ON with coolant output off, 8/9 = A-turret oil mist, 10/11 = A/B turret coolant, 12 = high pressure coolant, 13-15 = 2nd coolant 1-3.
3. 3Check the coolant tank level and top up if low; a low level is the most common cause of no-flow alarms.
4. 4Inspect the coolant pipe, filter and nozzle on the flagged line for clogging or kinks; clean or replace the pipe if restricted.
5. 5Verify the supply/flow sensor switch is mounted and set at the correct position for the line being monitored.
6. 6For codes 5-7 (flow switch ON while the coolant output is OFF), suspect a stuck flow switch; actuate it by hand and replace it if it does not release.
7. 7If flow is confirmed present but the sensor never turns ON, replace the supply sensor switch with a new one.