working. It will absolutely keep the user safe and display the error code( See the below page 14).
If alarm appears, please write down the error code No. and cut off the power. Don’t open the door and then turn on the
power again to wait the pressure turn back to “-0.5~0.5”.
Below is a list of alarms. If the user cannot solve the problem according to below chart, please contact your local
distributor or us, we will help the user solve problems.
8. Maintenance
We suggest running program once more to see if the error happens again.
No. Code Sound Conditions Reason Resolution
1 E31
“Du”long
beep
Temperature in chamber >150℃； The sensor of steam generator does not work. Check temperature sensor in chamber
2 E32
“Du”long
beep
Temperature of Chamber heater>280℃； The sensor of steam generator does not work. Check temperature sensor of the chamber heater
3 E51
“Du”long
beep
Temperature in chamber ≤0℃；
The sensor of steam generator does not work.The room
temperature is too low.
Check temperature sensor in chamber
Check room temperature.
4 E52
“Du”long
beep
Temperature of chamber heater≤0℃；
The sensor of steam generator does not work.The room
temperature is too low.
Check temperature sensor in chamber
Check room temperature.
1、steam generator temperature≤0℃；2、steam
generator temperature>230℃；
steam generator temperature>230℃；Steam temperature
control instability，over 230℃，steam generator
temperature sensor damaged.
Check steam generator temperature sensor,
control board, steam generator
The sterilization pressure is 40KPA more than designed
pressure. （134℃:210kpa /121℃process:110kpa)
vacuum pump damaged. Check vacuum pump. Do a vacuum test
134℃process： inner temperature >140℃ or 121℃
process：inner temperature >127℃；temperature
control instability.
temperature sensor inside chamber damaged. Check temperature sensor in chamber.
Temperature of Chamber heater>155℃；temperature
control instability，control board damaged.
temperature sensor is damaged. Circuit board is
damaged.
Check temperature sensor, chamber heater,
control board, chamber heater
In preheat period, after 8mins warm-up, temperature
Chamber heater<100℃；chamber heater damaged.
Chamber heater is damaged check the chamber heater.
In preheat period, after 8mins steam generator
temperature <110℃；heating rod damaged.
Chamber heater is damaged Check heating rod
When the period of “exhaust”, after working 10mins, the
pressure in chamber still over 0.5bar；air relief
instability.
Outlet solenoid valve is blocked. Check water drain valve
The door is opened during working；the door detector
switch damaged.
Door sensor is damaged Check door sensor.
13 E7
“Du”long
beep
The local air pressure is < 70KPa； local air pressure is too low. Wrong air pressure.
Can not use in these area. Adjust atmospheric
pressure:see 5.2
In pre-vacuum period, every 5mins temperature raise <
3℃.
Air leakage. No water inside tank.
Check water pump, heating rod, control
board.Check water level inside tank.
In sterilization period, the sterilization pressure is 0.3 bar
lower than the designed pressure.
No water inside tank. Heater inside steam generator is
damaged. Water pump damaged.
Check heaters, water pump, water level.
16 E10
“Du”long
beep
The electronic locker is in wrong condition Electronic locked damaged. Circuit board damaged. check electronic locker and circuit board
17 E11
“Du”long
beep
The electronic locker is in wrong condition Electronic locked damaged. Circuit board damaged. check electronic locker and circuit board
The vacuum not reach -70Kpa 2 times during the
program which have at least 3 times vacuum.
Vacuum pump damaged.Fan damaged. Check vacuum pump, fan
20 E99
“Du”long
beep
The communication between CPU is wrong. Connect disabled. CPU loosed. Check control board data line, and CPU
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