Yamato Scientific DNF 910 Constant Temperature Ovens - Manual (Page 64)

60
In the Event of Failure…
Safety Device and Error Code
Safety Device Purpose State Display Cause/Solution
Main relay
trouble
detection
To notice
impossibility of
heater circuit shut
off
• Alarm buzzer
activated
TROUBLE lamp blinks
Main relay Er
Call a service
• Failure in main relay.
™
Check the cause by
contacting to our
service division.
POST
function (*)
To check operation
of controller
• Heater circuit
shut off
• Alarm buzzer
activated
TROUBLE lamp blinks
or
Controller Er
Call a service
™ Check the cause by
contacting to our
service division.
Automatic
overheating
prevention
To prevent
overheating
• Heater circuit
shut off
None
• Overheating of sample.
™
Reduce the sample.
Key lock
To prevent wrong
operation
• Only the
POWER key
and change
of key lock
mode are
available in
key lock
state.
The Sub Display
displays the "Key lock"
with the alarm sound if
any of keys other than
given left is pressed.
• Set the function during
operation to prevent the
interruption of operation
due to wrong operation.
Refer to the page 44 for
the setting/cancellation
of function.
• The POST（Power On Self Test） function checks the microprocessor, memory, peripheral LSI and
peripheral circuit every time the POWER key is turned on. The function also checks the existence of
fatal failure before starting operation.
NOTE) Be sure to shut off the earth leakage breaker if any of safety devices above is activated. The
protection circuit is released and the unit recovers by turning on the power after correcting the error if
the safety device is activated due to overheating of sample or wrong operation.