What does error „E-11“ mean on Fisher Scientific Laboratory Equipment?
If your Fisher Scientific Laboratory Equipment displays the message “E-11“, it indicates that there is no data transfer from the NV-RAM to the CPU. In this case, replace the NV-RAM.
Why can't I open the lid of my Fisher Scientific Laboratory Equipment, and it shows error “E-17“?
If the lid of your Fisher Scientific Laboratory Equipment cannot be opened with the key at a standstill and displays "E-17", several issues could be the cause. The lid solenoid might not be getting enough voltage, so refer to the manual opening cord in the bottom plate. The PTC resistor may have released; wait two minutes and press the key again. A faulty driving or triac circuit could also be the problem, which would require replacing the complete main board. Alternatively, the lid coil could be faulty, necessitating replacement of the entire lid lock device. Ensure the lid is correctly locked by pushing it centrally into the lock and pressing the key again. Finally, the lid might be de-adjusted, so re-adjust it centrally.
How to troubleshoot drive noises and poor separation in Fisher Scientific Laboratory Equipment?
If your Fisher Scientific Laboratory Equipment drive is making noises and you're not getting good separation results, consider these possibilities: * The motor rubber mounts may be worn out; replace them (at least every three years). * The motor bearings might be failing; replace the entire motor. * There could be a defective terminal connection, faulty lead, or motor winding. Check the voltage on the motor terminal and winding resistances, referring to the test points on the boards. * The power electronics might be faulty; replace the main board.
Why does „OPEn“ appear when the lid is closed on my Fisher Scientific Laboratory Equipment?
If "OPEn" appears in the speed display of your Fisher Scientific Laboratory Equipment even when the lid is supposedly closed, it indicates that the 15V low voltage supply for the frequency converter (via the lid switches and motor over-temperature switch) is interrupted at standstill. Check the leads and connectors to the micro switch, and if the micro switch is faulty, replace the entire lid lock device. Also, check the motor over-temperature switch and leads for continuity, replacing any faulty parts (including the motor if necessary). Another possibility is that the 15V low voltage supply on the main board is defective, requiring replacement of the main board.
Why are all display elements briefly illuminated on my Fisher Scientific Laboratory Equipment?
If all display elements on your Fisher Scientific Laboratory Equipment are briefly illuminated, it could be due to a CPU program reset caused by EMI. Remedy the failure; if the voltage drops often, use a voltage stabilizer. Another cause could be a bad or missing ground connection. Check all ground connections and the ground connection of all boards.
Why does “Lid“ appear in the speed display of my Fisher Scientific Laboratory Equipment?
If “Lid“ appears in the speed display of your Fisher Scientific Laboratory Equipment, it could be due to several reasons: * The lid was opened manually during a run (which is forbidden!). Immediately close the lid, pull out and plug in the power cord again, press the start key to continue the run, or press the stop key to finish the run. * The 15V low voltage supply for the frequency converter, which runs through the lid switches and motor over-temperature switch, is interrupted during operation. Check the leads and connectors to the micro switch; if the micro switch is faulty, replace the entire lid lock device. * The motor over-temperature switch has tripped, blocking airflow to the motor, and only two phases are controlled to the motor. After cooling down, check the temperature s...
What to do if "bAL" message alternates with speed values on Fisher Scientific Laboratory Equipment?
If the "bAL" message alternates with speed values on your Fisher Scientific Laboratory Equipment, it indicates an imbalance run. Here's what to do: * Open the lid and check the rotor loading, then close the lid and restart. * Ensure the base is sturdy and not causing vibrations; change or reinforce it if needed. * Grease the trunnions. If the problem persists, the rotor itself might have an imbalance and should no longer be used; send it back to the factory. A damaged rotor fixing or drive shaft could also be the cause, in which case the centrifuge must no longer be used, and the nut or drive should be replaced. Alternatively, check leads with ohmmeter and replace if faulty. Inspect the calibration of the imbalance switch. If none of these steps resolve the issue, the imbalance cir...
What does “E-00“ message mean on Fisher Scientific Laboratory Equipment and how can I fix it?
If the “E-00“ message appears in the speed display of your Fisher Scientific Laboratory Equipment, it could be due to several reasons. The rotor might be jammed, so check for easy movement and remove any obstructions. The motor itself could also be jammed, requiring replacement. Inspect the plug or lead connection to the speed detection board, checking the plug contacts and leads, and measuring the speed signal on XW1/3; replace any defective parts. A faulty processing circuit could also be the cause, necessitating replacement of the main board. If the motor didn’t start, check the plug contacts and leads and replace any defective parts. Motor windings could be faulty, requiring motor replacement. Finally, the driving circuit or FETs might be the issue, in which case the main board needs t...
What does error „E-10“ mean on Fisher Scientific Laboratory Equipment?
If the “E-10“ message appears on your Fisher Scientific Laboratory Equipment, it indicates that the initialising of NV-RAM is not valid. Check the NV-RAM and its socket, and ensure the correct NV-RAM is inserted.
What does the error message „E-07“ mean on Fisher Scientific Laboratory Equipment?
If your Fisher Scientific Laboratory Equipment shows an “E-07“ message, it indicates that the compressor didn’t work. Check the leads, terminals, start relay, capacitor, and the compressor itself. It could also indicate a faulty cooling cycle with refrigerant loss, in this case search for leakage and close it, evacuate and refill with new refrigerant.
Yearly procedure for maintenance and checks.
Common issues, causes, and corrective actions.
List of error indications, causes, and troubleshooting steps.
Procedures for final electrical safety compliance checks.
Detailed functions of the main control board.
Description of the refrigeration system and its function.
Detailed wiring diagrams for different models.
Wiring diagram for the central controller.
Wiring for protection and overcurrent circuits.
Wiring for the motor output stage.
Steps for replacing electrical parts like fuses, boards, etc.
Procedures for replacing motor and motor supports.
Procedures for replacing cooling system components.
Verifying speed, time, temperature, and deceleration.
Tests for leakage current, insulation, and grounding.
The process of certifying calibration.
General| Max Speed | 15, 000 RPM |
|---|---|
| Frequency | 50/60 Hz |
| Capacity | 6 x 50 mL |
| Timer | 1 to 99 minutes, continuous |
| Voltage | 115V |
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