Terumo BCT Trima Accel, Руководство по обслуживанию

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Measured Position from Valves
These bits cannot reasonably be measured in the field. Use the valves section of STS to observe the
control and safety status while commanding the valves. If all the valves indicate “unknown,” it is
possible that the +5 V LED or position sensor power is faulty. Check the +5 volt output from the
safety CCA or the power supply.
Valve Fault Bits
These bits cannot reasonably be measured in the field. Use STS to view the faults log to determine
whether a valve fault bit is being sent from the motor driver CCA.
The valve fault bit can be triggered by a momentary/persistent under-voltage or over-current
problem in the motor driver CCA. The +24 V current sense line is the current of the motor driver
CCA presented as a DC voltage (current sense voltage). The current is a combination of all the
currents from the pump motors, the valve motors, the linear actuator motor, and the door lock
solenoid. To calculate the current from the DC voltage, use the following formula:
Combined Current (Amps) = Current Sense Voltage ÷ 0.51.
The value of the current is recorded in the dlog file and reported to STS; however, the system does
not use this value to trigger alarms. The following values are the worst-case current values (not the
alarm limits):
•
Valves (×3) and linear actuator, an aggregate current limit = 1.15 A
• Pumps (×4), individual current limits = 2.30 A
• Return pump, individual current limit = 3.83 A
• Lock solenoid, individual current limit = 2.30 A
• Worst-case +24 V current, the value could be approximately 16.48 A (this assumes that all
loads are active and near their individual driver circuit current limits)
Valve System Mechanical Failure Symptoms
This section describes common mechanical failure symptoms for the valve system.
Valve System Troubleshooting
Trima Accel
®
Automated Blood Collection System • Service Manual 4-7