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ALARMS & SAFETY FUNCTIONS
This unit has the alarms and safety functions shown in table below, and also self diagnostic functions.
Alarms and safety functions
Alarm &
Safety
Automatic set
temperature
Alarm
Auto return
Key lock switch
Temperature
sensor
abnormality
Triac
abnormality
Relay
abnormality
Independent
over-heat
protection
Situation
If the internal temperature
deviates from the set
temperature by +10°C or more
(and if timer mode 1, by -5°C or
more)
If a key operation is not
performed for about 45 sec. in
each setting mode.
When the key lock switch is
turned ON.
If the temperature sensor goes
open circuit.
If the triac goes open circuit.
If the triac goes short circuit.
If the relay goes short circuit.
If the relay goes open circuit or
fan motor and heater goes short
circuit. Or the ambient temp,
of circuit is 65°C or more.
(when unit is not running)
The security circuit is activated
by independent temp, sensor if
the chamber is abnormal over-
heating.
(When unit is running)
The security circuit is activated
by independent temp, sensor if
the chamber is abnormal over-
heating.
Indication
Alarm lamp lights.
All digits on the
indicator flash.
Normal display mode.
Alarm lamp lights.
E01 is displayed on
the indicator.
Alarm lamp lights.
E02 is displayed on
the indicator.
Alarm lamp lights.
E03 is displayed on
the indicator.
Alarm lamp lights.
E04 is displayed on
the indicator.
Alarm lamp lights.
E05 is displayed on
the indicator.
Without display
change.
Alarm lamp lights.
E05 is displayed on
the indicator.
Buzzer
Intermittent tone
—
—
Intermittent tone
Intermittent tone
Intermittent tone
Intermittent tone
Intermittent tone
Continuous tone
Continuous tone
(When the temp,
s decreased,
ntermittent tone)
Safety operation
—
The setting mode
is cancelled.
Key input is
disabled.
Heater OFF
Heater OFF
Heater OFF
Heater OFF
Heater OFF
Heater OFF
forcedly by
external circuit.
Heater OFF
forcedly by
external circuit.
* The buzzer tone resulting from the independent over-heat protection cannot be stopped with the BUZZER
key. Turn off the main switch.