Fault: When the automatic temperature control temperature does not rise up the cause?

1.  Heater burnout (Special Note: both ends of the heating wire is less  than the amount of resistance is called a heater burned out, but it is  automatically sterilized fermentor: Paul warm bad sterilization  procedures together with the error, When the heater is turned on automatically ---- After sterilization for complete new heater will be Gesanchawu broken heater)

2. Line a wrong (usually easy to find the problem when debugging)

3. circulating valve did not open (for the novice to use the fermenter)

The solid-state relays bad

5. Paul warm tone too low or too high temperature protection tone, the general requirements to between 60-70 degrees.

6. valve stuck

7.220V heating power CB trip

8. circulation pump is broken (when the heater is working properly, but the current warming elevated tank)

9. 220V heating neutral wire not connected

Resolution steps

1, the temperature setting of 50 degrees, according to the automatic

2, the cooling valve open, 3-5 minutes after the start of the heating drawn: water level control is good

3, the current amount of red FireWire solid state relays on a current draw: heater is good

4, the current size of the open space and insurance match? Does not need to match with the change.

5, Paul transferred to 0 degrees temperature, solid state relays OFF drawn: solid state relay is good

6, Paul transferred temperature of 65 degrees

7, automatic temperature control more than one hour

 

Failure II: Just start heating power on the trip

Inspection methods: (1) Check plc, and each terminal on the relay wiring is correct

          (2) plc relays and solid state relays light is bright

          (3) If the plc relays and solid state relays lamp light,  respectively, the amount of heater resistor terminal and the heater  housing, generally energy to a few ohms to several tens of megohms  resistance.

          (4)  heating circuit is complete, usually find a place off the line (the  machine casing is connected with the bottom line and the machine casing  contacts the broken line and connected to the machine casing is  equivalent to the zero line is directly connected to FireWire and caused  a short circuit, this situation occurring less)

         

Failure three: automatic temperature control instead of falling temperatures always possible causes

(1) water pipe barrier (check the total valve, piping, etc. is smooth)

Another valve with chiller chiller to check on the water did not open or chiller, pumps and other bad

(2) solenoid valve is broken

(3) control line solenoid valve is broken (including: plc, relays, insurance, transformer is damaged)

(4) lack of water pressure (solenoid valve is opened and closed loop valve jacket pressure is zero or very small)

     

We solved this way:

1, first you need to check the temperature of the fermentation tank and automatic control valves open correctly? The total water supply is turned on? The total pressure to meet the requirements?

2, according to the manual cooling.

3, with the iron on the tool contacts the screw valve solenoid, whether there is vibration sense?

4. If not, it would have to check the plc output of the lamp is lit lamps and relays.

If you need to properly check the transformer voltage check is normal;

If you need to check the normal insurance.

5, automatic temperature control more than one hour, debugging qualified, commissioning signature


Failure four: Determine the quality of agitation (AC)

1, stirring motor to see if they are directly connected to the motor  and the power-month supply of electrical power to see whether there is  open space that matches or insurance, there is no need to add the words.

2. Check the motor in the wiring correct?

3, first of all turn to see a Story or reverse?

4, no abnormal noise during rotation

5, sit observed from the shaft coupling contact hole is intact

6, if there is abnormal sound seal

7, the shaft is shaking case

8, PV value and the deviation of the set value is transferred within 5

9, automatic speed control in more than 50 revolutions an hour to see if the motor is stopped?

10, at 500 rpm speed automatic control (maximum number of revolutions)  more than one hour, stirring shaft to see if hot, motor temperature is  normal?

At the same time you want to check whether the temperature and ph, do so on a great display values fluctuate?

 

Failure Friday: DC motor is good or bad

1, the motor and the coupling is even better, the motor or shaft is shaking

2, no abnormal sound mechanical seal

3, the axis does not shake

4, PV value and the set value is matched

Automatic speed control in 500 revolutions (maximum number of  revolutions) over one hour, stirring shaft to see if hot, motor  temperature is normal?

5 speed automatic control at 50 revolutions see whether continuous agitation? For more than one hour.

6, at the same time to check whether the temperature and ph, do so on a great display values fluctuate?

 

Failure Six: Feeding and anti-foaming is normal

(1) manually open the feeding pump and the pump can turn defoaming

Various parameters associated with the control (2) look normal feeding

(3) look at whether anti-foaming pump and associated high defoaming

 

Failure Seven: leak

(1) sub-holding pressure ventilation. And there is a certain pressure, closing the intake valve, exhaust valve closed. Observe a seamless point. With soap and water detection

(2) If the steam pipe. Through steam condensate drain. Close the drain valve. Observed leakage

One. Heater does not heat the reason?

A: There are a few!

1. pick the wrong line heater burn 2. 3. Temperature cycling valve did not open 5. 6. Paul did not open the valve stuck

7. The lines are short circuit

Three. Solid State Relays bad

Check the way: the corresponding (1) look at CPU

          (2) relays whether bright lights and solid-state relays

          (3) If the ①② lights. By resistance method, disconnect the terminals on the line, measure the resistance heater

          (4) can be measured in ③ of the heater is substantially formed passageway. Check if a heater path

          (5) look circulation valve is open

II. Insulation instead of falling when possible causes

A: There are several possible

(1) cold water pipe barrier

(2) solenoid valve line barrier

Inadequate (3) Water Supply

(4) 36V blown fuse wire

(5) measuring the terminal voltage of the terminal 2

Solution: On cooling, see CPU lights. Relay lights are bright. If the normal closing conditions detected through the valve

Three. Determine the quality of stirring (AC)

Answer: (a) must first turn

    (2) no abnormal sound pumping rotation

    (3) take from the shaft holes in the coupling contact is intact

    (4) whether there is abnormal sound seal

    Shaking (5) axes

    (6) PV value and the deviation of the set value is transferred within 5

Four: DC motor is good or bad

A: (1) whether the motor and coupling even better, resistance is shaking

    (2) mechanical seal without abnormal noise

    (3) axis does not shake

    (4) PV value and the set value is matched

Five. Feeding and anti-foaming is normal

A: (1) Open up the feed pump and the pump can turn defoaming

    Various parameters associated with the control (2) look normal feeding

    (3) look at whether anti-foaming pump and associated high defoaming

VI. Jianlou

A: (1) sub-holding pressure ventilation. And there is a certain pressure, closing the intake valve, exhaust valve closed. Observe a seamless point. With soap and water detection

    (2) If the steam pipe. Through steam condensate drain. Close the drain valve. Observed leakage

Seven. PH Correction

Answer: Correct, if allowed. See  red font on the correct page, in the case 0 replacement transmitter,  such as the display value erratic, replace the electrode or wire