Yamato DKG610, Instruction Manual

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8. Troubleshooting
Safety device and error codes
The unit has the self diagnostic function with a controller and a separate safety device.
Table below shows possible causes and measures when the safety device is triggered.
[Error codes]
When an operational error or a malfunction should occur, the alarm lamp on the control
panel comes on, an error code is displayed, and the alarm buzzer sounds. When an error
occurs, check the error code and immediately stop operating the unit. Note that a measured
temperature error will be notified only with indication and the alarm lamp will not sound and
the alarm lamp will not sound.
Safety device Symptom Possible causes and measures
Detection of
sensor error
Alarm lamp on
indication

Disconnection or other errors in the
temperature sensor
Contact our service department.
Detection of SSR
short circuit
Alarm lamp on
indication

SSR short circuit
Contact our service department.
Detection of
heater
disconnection
Alarm lamp on
indication

Heater disconnection

Current detecting element disconnection
or error

Temperature fuse blown out
Contact our service department.
Memory error Alarm lamp on
indication

Memory setting error
Contact our service department.
Internal
communication
error
Alarm lamp on
indication

Internal communication error, temp. input
circuit error
Contact our service department.
Overheat Alarm lamp on
indication

Activation of overheat preventive unit

Overheat preventive unit disconnection or
error
Check the set temperature.
If the unit does not reset, contact our
service department.
Measured
temperature error
－－－－
indication
Measured temperature is out of display
range
Contact our service department.