Yamato Scientific BH500 Thermo-Elite - Manual (Page 28)

25
Safety device and error code
The self-diagnosis function built into by the controller and the independent safety device from
the controller are installed in this machine. The table below shows the cause and the
processing method when the safety device operates. When the safety device operates, the error
code is displayed to a main display. Deal with it according to the processing method shown
here.
Safety device Display Cause and counter-medsures Notes
Earth leakage
breaker with
over current
protector
No display
Report to our service office and check
the cause of problem.
Motor thermal
protector
No display
Overheating of motor:
Report to our service office.
Automatic
overheat
protector.
No display
Heating of samples:
Reduce the amount of the sample.
Sensor
malfunction
detector
TROUBLE lamp flashes
flashes
Break in temperature sensor circuit:
Report to our service office.
Triac short-
circuit detection
TROUBLE lamp flashes
flashes
Short-circuit of Triac:
Report to our service office.
Heater short-
circuit detection
TROUBLE lamp flashes
flashes
Heater circuits disconnected:
Report to our service office.
Incorrect setting of independent
temperature overheating prevention
device:
Set correctly.
Heating of samples:
Reduce the amount of the sample.
Independent
temperature
overheating
prevention
device
TROUBLE lamp flashes
flashes
Malfunction of the independent
temperature overheating prevention
device:
Report to our service office.
BH500 and
the machine
equipped with
independent
temperature
overheating
prevention
device
Main relay
defect detection
TROUBLE lamp flashes
flashes
Malfunction of main relay
Report to our service office.
Decrease in water level:
Supply water.
Rise of water level (thermal expansion):
Decrease liquid from reservoir.
Water level
abnormality
detection
TROUBLE lamp flashes
flashes
Malfunction of water level detector:
Report to our service office.
The unit
resume to
working when
liquid level
becomes
normal.