Yamato Scientific BH500 Thermo-Elite - Manual (Page 29)

26
Maintenance and inspection
Warning
1. Never disassemble and modify this unit.
•
Do not disassemble the unit.
•
If the unit is disassembled, an electric shock and ploblems may be caused.
Caution
2. Maintenance Precautions
•
Before starting inspection or maintenance, disconnect the power plug from the
receptacle.
•
Conduct inspection and maintenance only after the unit has cooled down.
•
When you remove dirt or stains from the unit’s resin parts and the control panel, use a
soft wet cloth. Do not use benzene, thinner, cleanser or a hard brush; it will cause
deformation, qualitative deterioration and/or discoloring of the components.
3. Monthly inspection
•
The independent temperature over-rise prevention device is important safety
component. Be sure to inspect it periodically. (See chapter of Operation check of
independent temperature overheating prevention device on this page)
4. Operation check of independent temperature overheating prevention device
•
After executing the fixed temperature operation at the set temperature 0
°
C, set the
operation temperature of the Independent Temperature Overheating Prevention Device
to 0
°
C.
•
Under normal circumstances, the heater circuit is cut off in a few seconds and the
TROUBLE lamp and
flashes at the same time, and the alarm buzzer sounds if
the alarm buzzer function is ON.
•
After confirming, turn off the earth leakage breaker once, and then return the setting of
the Independent Temperature Overheating Prevention Device to the proper value.
Turn the earth leakage breaker back ON.
•
Always perform inspection before a long continuous operation or an unattended
operation.