Biobase BKQ-B Series User manual

Vertical Autoclave Sterilizer
BKQ-B Series
Maintenance Manual
NO.：XDGF2017-010
BIOBASE BIODUSTRY (SHANDONG) CO., LTD
Address: NO. 51 SOUTH GONGYE ROAD, JINAN, SHANDONG, CHINA

1
Preface
Inspection and repair steps after failure of the vertical steam sterilizer:
After a failure of the vertical steam sterilizer, there is always one major failure.To analyze this major
fault, you can find the cause of the fault and how to eliminate it.We can generally find the cause of
the fault through the following ways,When overhauling, it should follow the principle of easy first
and hard, and gradually reduce the scope, and finally focus on a certain point.
Before repairing the machine, first of all, ask the operator about the situation.
For example, how long has the machine been used, when did the last maintenance (maintenance)
occur, what are the problems with the machine,whether or not there are replacement parts, how is the
maintenance(maintenance) effect,what is the failure in this case,what is the specific performance,and
Carefully review the machine's maintenance records,note which parts and consumables have been
replaced in the near future,and what parts have expired and have not been replaced.
Basic equipment structure diagram:

2
I. Sterilizer alarm code and solution
After the initial situation is known, check the alarm code displayed by the sterilizer and query the
reason of the alarm code.
Error
Code
Cause
Problems
Solution
Err 001
30 minutes after pulsing
cooling air doesn’t reach
the set temperature
Heating tube is bad,
there is leakage
phenomenon
Replace the heating
pipe or check the
pipe for leakage
Err 002
Failure to reach the set
temperature or pulsating
exhaust failure during air
cooling time
The heating pipe is
bad or the parameters
are not reasonable
Replace the heating
tube or check the
set parameters are
correct
Err 004
After reaching the set
temperature,the
temperature doesn’t
stabilize within 10
minutes or the
temperature during the
sterilization process
fluctuates too much
Air leakage
Check for leaks in
the pot fittings or
tubing.
Err 008
Sensor isn’t connected or
damaged, the temperature
in the pot is below 10°C
Sensor problem
Change the sensor
Err 016
Circuit board temperature
measurement component
failure
Circuit board burn out
Replace circuit
board
Err 032
There is no sufficient
amount of water within
the set amount of water
Water level float ball
bad
Replace water level
float ball switch
Err 064
The lack of water in the
pan causes the heating
tube to dry
The lack of water in
the cavity or the
failure of the
temperature protector
Add sufficient
amount of water
after cooling, or
replace the
temperature
protector
Err128
The door was opened
while the machine was
running
1.the door detection
switch broken
2.The door was not
closed firmly
3.The nut of the door
shaft is loosen.
1. replace the door
detection switch
2. Close the door
again.
3. Fasten the nut.

3
1.Code Err 001:Leakage phenomenon:
Inspection and treatment methods:Under the positive pressure condition of the pressure gauge,check
the connection of the pipelines and seals of the equipment,whether there is leakage,confirm the
position,and contact the manufacturer.
2.Code Err 002:Bad heat pipe, unreasonable setting parameters:
Inspection and treatment methods:Check whether the heating tube is dry and black,or the time setting
of the cooling air is not reasonable.
3.Code Err 004:Leakage:
Inspection and treatment methods:1.Under positive pressure condition of the pressure gauge, check
the connections of the pipelines and seals of the equipment, if there is leakage, confirm the position,
and contact the manufacturer. 2.The device is in a wet environment, causing circuit board failure.
(with Err 001)
4.Code Err 008:Sensor fault or ambient temperature too low:
Inspection and treatment methods:1.Please confirm whether the ambient temperature is lower than
10℃. 2.Hold the bottom temperature probe (blue circle) by hand to observe whether the temperature
displayed on the control panel is normal.If the display is abnormal, the sensor is faulty. Contact the
manufacturer.
5.Code Err 016:Circuit Board Temperature Sensor Failure:
Inspection and handling methods: Replace the control board.
6.Code Err 032:There is not enough water in the set time:
Inspection and treatment methods: Add water to the pot, if the water exceeds the water level, the
float still does not turn to the heating process, then it is determined that the water level floater is
damaged (blue circle is the water level floater).
7.Code Err 064: Drying heat pipe:
Inspection and treatment methods: After the equipment is powered on, in the cold pot state, manually
toggle the float switch up and down to observe whether the corresponding lamp on the circuit board
is lit or extinguished. If it is normally lit or extinguished, confirm whether the equipment is
overloaded.

4
Err002
1.First of all, to observe the temperature when the alarm occurs, how many degrees.If the
temperature does not exceed 100 degrees, it may be because the heating tube fails to heat up.
Inspection Method: pour water directly in the pot, the water needs to float over the water level float.
Long press the door detection switch, start running the machine for about 3-5 minutes,observe
whether the heating tube bubbles.Heater tube is intact if air bubbles are generated.
(door detection switch)
2. Parameter adjustment is not suitable: Temperature and pressure do not match.
3. Altitude and pressure problems lead to temperature rise abnormally may also cause E002 alarm.
Inspection Method: Reduce the temperature end of the exhaust cold air , in order to achieve the
change in temperature under changed air pressure. The ending temperature of exhausting cool air is
set to between 101-103 degrees! The method is following.
represents the ending temperature of exhausting cold air,press the "Start / Stop",the
button displays the value and flashes,through the "▲","▼" to change value.The default value is 105,
press"▼" to change it to 102,then press the "start / stop" to confirm.
If problem remains after the above operate,follow the bellow instruction.
(Another reason for E02 is the parameters was affected by the environment,so you could restore
factory setting.
Press START/STOP and TEMP together 5s,then enter the menu,

5
Press "▲", "▼" when shows
Press START/STOP press ▲▼when it shows
press START/STOP.
Then Press START/STOP and TEMP together 5s save.
Then Restore factory setting.)
Err04
1.Check if anywhere leak
1.Power on the machine,press the four buttons“TEMP“ “START/STOP”“▲” “TIME”to gether 5
second.
2.Press“▼”or“▲”select the then press“START/STOP”,remember the display original
number(note:must take a photo of this number) press“START/STOP”.for example if the number is
1384.
3.Repeat the first step select the ,then press“START/STOP”,remember the display
original number(note:must take a photo of this number)press“START/STOP”.for example if the
number is 430.compare two numbers ,select the bigger one.
4.change 1384 to 1379,then press “TEMP “ “START/STOP” “▲” “TIME” at the same time to save.
Err08
Fault description:the sensor is not connected or damaged,the temperature in the pot is below 10℃.
Cause of failure:if 008 alarm appears, it may be sensor fault or circuit board failure. If 008 alarm
appears in operation, it may be sensor fault or control board fault.
Inspection method:
check indoor temperature first,if room temperature is below 10℃,008 alarm will appear.If 008 alarm
appears when indoor temperature is higher than 10℃,circuit board or sensor should be replaced
directly.
008 alarm appears in operation.Hold the sensor probe at the bottom of the sterilizer chamber under
cold overheating.Observe whether the temperature displayed by the control panel changes normally.

6
If the temperature display is abnormal, the connection may be off, sensor failure, circuit board
failure.
Solution: from the left maintenance window, observe whether the wiring of the temperature sensor
on the circuit board is wrong or not. If normal, it is necessary to loosen the connection terminal with
a screwdriver.remove the connection of the temperature sensor, and use a multimeter to measure the
resistence of sensor ,white and any red terminal to judge whether the sensor is damaged or not
according to the resistance value.(normal value is about 109Ω)
Change the sensor with a cross screwdriver, remove the screws marked in the drawing, and remove
the left cover.

7
Loosen the sensor wire, follow the sensor wire to find the sensor head, and remove the sensor with a
wrench.
Wrap the new sensor head around the raw material belt, tighten the sensor in its original position, and
then attach the three sensor joints to the circuit board (white,red) in its original position.
2,replace the circuit board. First of all, from the left maintenance window, all the wiring on the
circuit board loosened. Release the fastening screws on the circuit board. Remove the circuit board.
When disconnecting the wiring of the circuit board, pay attention to the mark to prevent the wrong
wiring during installation and cause the circuit board to burn out.

8
Fix the new circuit board in its original position,and then attach all the wiring harness to the circuit
board in its original position.
E32:
Fault explanation: in the specified time,there is no enough water in the chamber.
1.press on the door switch all the time,run any program,check if there is water flow into chamber
quickly.if the water flowed slowly or no water goes into chamber,the filter or solenoid valve
clogging.pls follow 2 step.
2. Cause of failure: filter clogging, solenoid valve clogging,

9
Approach:
Clean the filter screen: remove the filter net from the two yellow filter nuts with filter labels on the
back of the machine, wash the filter net with clear water, and then tighten the filter net.
2. Cleaning solenoid valve spool:
dismantle the rear cover of the machine, and the electromagnetic valve in the middle is the intake
solenoid valve.
remove the solenoid valve from the machine and remove the solenoid coil.
disassemble the solenoid valve core with wrench and clean the foreign body in the valve core.

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3.Water level switch jammed or malfunctioning, solenoid valve malfunction.
Inspection of water level switch: Open the machine chamber cover, take out all the objects in the
chamber, at the bottom of the machine, equipped with a water level detection switch.
If the ball valve is easy to move and the icon lights will flicker, the water level switch will be all
right. If the ball valve has greater active resistance, or The lamp will not be lit, it may be the water
level
Switch fault, need to check water level switch
Is the connection normal or the water level switch replaced.
Replace water level switch: first remove the wiring of the water level switch on the circuit board,
remove the back cover of the machine and find the position of the water level switch. Unscrew the
nut of the water level switch and remove the water level switch from the cavity.
Install the new water level switch to the original position and connect the connection to the water
level switch
The connection is sufficient.
Water level float

11
Err064：
Error description:The water shortage(no water) in the pot causes the heating coil heat without water.
Fault reason:water level float doesn’t work, solenoid valve has problem,or overload use.
Check method:1 、Power on the device,manually move the float up and down when the pot is
cool,observe whether the corresponding indicator lamp on the circuit board is on or off normally,it
proves the float is normal, if it is not normal, the float is broken.
2、If it appeared E064 at the beginning of the machine powered on,it is judged the anti-dry thermostat
is broken.
3、If it appeared E064 during heating-up process,observe whether there’s water out from the tank
tube, and obverse water out position,if the water out from the drain pipe, it is judged the solenoid
cannot be closed,it needs to clean the valve or change it.if the water flow from net above the flushing
port,it is judged the solenoid valve cannot be closed or installed in the opposite position.

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4、if it appeared 064 in sterilization process,please whether overload use the machine.
Check method：
1、 change the water level float。 Remove the back cover of machine,find connection cable,loosen the
connection cable on the circuit board， remove the screws of the float,take out the old water level float
from the pot. Install the new float in the original position.
2、change the solenoid valve. Use cross screwdriver，remove the back cover of the machine，find
water-in and water-out solenoid valve, unplug the connection cable.
Water-out
valve
Water-in

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remove the old solenoid valve, and install the new valve according to the original place and position，
install the pipe according to the original position(the pipe cannot be connected wrong,valve 1 mouth
connected to the pot,2 valve mouth connected to the water tank through the outer filter) please mark
the1 and 2,avoid connecting wrong position.
Err128
ERROR:The door was opened while the machine was running
Error factor:
1.the door detection switch broken
2.The door was not closed firmly
3.The nut of the door shaft is loosen.
Solution:
1.open the door,find the door detection switch ,press it and check the indicator light or not,if it goes
off,the switch is ok.

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2.turn off the machine， after the pressure turn back to 0,open the lid,and close the lid again,make sure
the lid closed firmly,restart it.
3.remove the hand wheel and cover of the machine.Check if the nuts on the shaft are fastened or not.
There are photos

15
II. How to replace electrical components
In order to ensure that the sterilizer is in good working condition and to reduce the number of failures
as much as possible, the operations described in this chapter must be followed.
Before starting maintenance, make sure that the equipment is powered off. At the same time, there is
no pressure in the sterilization container.
After the daily work is finished, clean the door apron with a soft cloth or a piece of gauze.
Take out the basket. Wipe the inner wall of the sterile container with gauze with detergent and water.
Don`t use steel slag or steel brush, so as not to damage the sterilization chamber walls.
Clean and remove scale from the interior of the sterilization container.
Once a week, wipe the sterilizer cover with a soft cloth.
Once a week, check the safety valve.
Periodic inspection
Once a month, tightening the connector and detecting the on-off status should be done by a
professional electrician.
Once a year, the door lock device must be inspected due to extreme wear and tear.
Instructions for use: This type of maintenance manual is for professional use. Unless you are a
professional, otherwise equipment failure, be sure to consult the instructions and repair according to
the instructions. The instructions have been as professional as possible
Provide maintenance methods.
1. Check safety valve
It is located at the rear of the device.
In order to prevent the safety valve from being blocked, in normal use, let the steam pressure pass
through it every two months.
Release once.
1) According to the manual, perform the sterilization operation.
2) Generate a pressure of 0.22 MPa in the sterilizing vessel.
3) Push the safety valve stem with a screwdriver so that it is in the open state for about 2 seconds.
4) Turn off the main switch and terminate the operation. At the same time, the steam in the
sterilizing vessel is discharged.
5) Wait until the pressure drops to 0 MPa before opening the door.

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2. Replace safety valve steps
Usage Notice:These repairs may only be carried out by qualified personnel.Unless you are a
professional talent,otherwise,avoid electric shock, equipment failure,be sure to check the manual,
and according to the instructions for maintenance,at the same time,the manual has provided the
professional staff with maintenance methods as much as possible.
1)It is located above the rear of the device。
2)Remove safety valve retainer screw, remove the safety valve from the safety valve seat.
3)Replace it with a qualified safety valve. Test the sterilization process.
3. Thermostat
Located inside the device. The sterilizer is equipped with a thermostat. It can maintain a constant
temperature by turning the power on and off during the heating and sterilization phases. Usually used
as a temperature alarm device. If the pot temperature exceeds the allowable value, the
thermostat
automatically turns off the heater.
When the pot temperature dropped below the allowable value, the thermostat automatically
connected.
4. Replace thermostat steps
Before this operation, cut off the power and make sure there is no pressure inside the sterilizer.
1)Remove the thermostat wiring on the main circuit board。
2)Put the device on the ground.
3)Remove the thermostat at the bottom of the pan。
4)Remove the thermostat probe attached to the heating tube.
5)Replace the damaged thermostat with a new thermostat, The location of the new thermostat to be
replaced with the location of the thermostat coincide, and wiring。
6)Lift the device.
7)Test all the work process.
5. Replace the heating tubes step
Before this operation, cut off the power and make sure there is no pressure inside the sterilizer.
1)Put the device on the ground.
2)Remove the wiring from the heater on the bottom of the pot.
3)Loosen the captive screws on the heater.
4)Replace the damaged heater with a new one,The position of the new heater should match the
position of the heater to be replaced and be wired.
5)Lift the device.
6)Test all the work process.

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6. Replace the water level float step
Before this operation, cut off the power and make sure there is no pressure inside the sterilizer.
1）Remove the wiring of the water level float on the main circuit board.
2）Put the device on the ground.
3）Remove the water level float at the bottom of the pan.
4）Replace the damaged water level float with a new water level float, The position of the new water
level float should coincide with the position of the water level float to be replaced and be connected.
5）Lift the device.
6）Test all the work process.
7. Replace the temperature sensor step
Before this operation, cut off the power and make sure there is no pressure inside the sterilizer.
1)Remove the main circuit board temperature sensor wiring.
2)Remove the temperature sensor on the side of the pan
3)Replace the damaged temperature sensor with a new temperature sensor, The position of the new
temperature sensor should match the position of the replaced temperature sensor and be wired.
4)Test all the work process.

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Appendix 1 Electrical wiring diagram

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Appendix 2 pipeline wiring diagram