Voltage Low Limit Monitor Timing: When analyzing, when monitoring Monitor Method: Monitors voltage CA-500’s Action: Emergency stop (1) Probable Cause 1. The power fail is occurred. 2. The momentary power fail is occurred. 3. Instability of the AC line voltage (2) Confirmation by the operator 1 Confirm whether the power fail or the momentary power fail is occurred. 2. Confirm whether AC supply to the Main Unit is over the capacity of connection tool. (3) Confirmation by Service Engineer 1. Check the AC line voltage is stable within the capacity. 2. Check the voltage between pin No. 33 and 34 of the flat cable (PS control harness) between PCB No. 4086 and PCB No. 6362 is within 1.7 V ± 10%. 3. If the voltage is within above, the PCB No. 6362 might be faulty. 4. In other case: 1) Check the PCB No. 4086 fuse is blown. 2) If the PCB No. 4086 is not blown, flat cable might be faulty. 3) If the PCB No. 4086 is blown, the following might be faulty by 24 V short circuit in Y, Z drive: ? PCB No. 4086 ? X PC board harness ? PCB No. 9260 ? X axis motor wiring cord ? PCB No. 2134 ? Y-Z relay harness ? PCB No. 9264 ? Y axis motor ? Z axis motor ? Reagent heater pipette
