Yamato Scientific DNF 910 Constant Temperature Ovens - Manual (Page 65)

61
In the Event of Failure…
Trouble Shooting
Refer to page 59 "Safety Device and Error Code" for the state of unit at activation of safety device and
corrective actions.
Problem Possible Cause Solution
Power is not supplied.
Check power connection and
turn on electricity.
Earth leakage breaker failure. Replace the breaker (*)
The sub indicator does not
indicate current date and time
when the electric leakage
breaker is turned on.
Controller failure. Replace the controller (*)
Problem in power source.
Connect to the appropriate
power source. The operation panel indicates
none when the power key is
pressed.
Controller failure. Replace the controller (*)
Damper is opened. Close the damper.
Temperature does not rise.
The safety device in independent overheating
prevention device or self-diagnosis function is
activated and the heater circuit is shut off
(error code indication).
Refer to page 59 "Safety
Device and Error Code".
Damper is opened. Close the damper.
Too much samples loaded.
Refer to the item 6 and 7 on
page 6.
Controller failure. Replace the controller. (*)
Temperature is slow in rising
Temperature sensor failure. Replace the sensor (*).
Variable ambient temperature.
Refer to the item 2 on page
4.
Effect of sample.
Refer to the item 6 and 7 on
page 6.
Controller failure. Replace the controller. (*)
Instable indication
of temperature
Temperature sensor failure. Replace the sensor (*).
• Please consult your retailer or any of our branch offices for the corrective actions with "*" mark or that
other than listed above.
If power failure occurs…
The unit returns automatically to start operation automatically with the same condition as just
before the failure when it occurs during operation and is recovered. It, however, is dangerous
that the unit starts unmanned operation automatically. We recommend to turn off the switch at
power failure