Section 1
Symptom:Alarm 151 LOW THROUGH SPINDLE COOLANT.
Possible Cause:A short circuit in the pump motor or pump
motor cable caused a fuse to blow or a circuit breaker to trip.
Corrective Action:
1. Check for a blown fuse or a tripped breaker:
TSC-300 - On the power supply PCB: Make sure that the fuses
at F1 and F3 are not blown. If there are blown fuses, check for
shorts in the motor or motor cable in Step 2 before you replace
the fuses.
TSC-1K - On the motor drive PCB: Make sure the circuit
breaker [2] on the motor drive PCB is in the ON position.
If the circuit breaker has tripped, turn it back on. Test the TSC
system. If the circuit breaker trips again, check for a short circuit
in the TSC pump.
Note: On pumps made before December, 2016, you must use
water-based coolants with The TSC-1K system. Thicker fluids
like cutting oil will overload the pump and trip the breaker.
2. Check the pump for shorts:
Measure the (3) leads [3] to ground [4] on the TSC power cable.
If all leads [3] test open to ground [4], the pump and cable do not
have a short.
If the motor cable leads [3] indicate a short, disconnect the cable
from the motor. Measure the (3) cable leads [5] to ground [6]. If
any lead tests short, the pump is at fault. If none of the leads [5]
test short, the cable is at fault.
3. If all leads test OK:
Check the TSC motor for binding that could cause an over
amperage condition.
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