16
ALARMS & SAFETY FUNCTIONS
This unit has the alarms and safety functions shown in Table 4, and also self diagnostic functions.
Table 4 Alarms and safety functions
Alarm & Safety Situation Indication Buzzer Safety operation
High temperature
alarm
If the chamber temperature
deviates by +10
o
C (factory set,
changeable) from setting.
Alarm lamp is flashed.
Temperature indicator is
flashed.
Intermittent tone after
a delay 15 minutes.
Remote alarm is
activated after a delay
of 15 minutes.
Low temperature
alarm
If the chamber temperature
deviates by -10
o
C (factory set,
changeable) from setting.
Alarm lamp is flashed.
Temperature indicator is
flashed.
Intermittent tone after
a delay 15 minutes.
Remote alarm is
activated after a delay
of 15 minutes.
Power failure alarm
In the case of power failure.
When power switch is turned OFF.
When the power to the unit is
disconnected.
Alarm lamp is flashed. Intermittent tone
Remote alarm is
activated.
Door alarm When the door is open. Door check lamp is lit.
Intermittent tone after
a delay of 2 minutes.
-----
Auto return
If a key operation is not performed
for about 90 seconds in each setting
mode.
Chamber temperature is
displayed.
-----
Setting mode is
canceled.
Key lock When the key lock is ON (L1). ----- ----- Key input is unable.
Thermal sensor
Abnormality
If the thermal sensor goes
open circuit.
Alarm lamp is flashed.
E1 and LO are displayed
alternately.
Intermittent tone
Remote alarm is
activated.
Operation is keeping
continuously.
If the thermal sensor goes
short circuit.
Alarm lamp is flashed.
E1 and HI are displayed
alternately.
Intermittent tone
Remote alarm is
activated.
Operation is keeping
continuously.
Compressor temp.
Abnormality
In case of failure of compressor
cooling fan motor.
In case of abnormal high ambient
temperature.
----- Intermittent tone
Remote alarm is
activated.
Compressor stops
running when the
temperature about
95
o
C.
Note:
￭ The alarm can be canceled by pressing the alarm buzzer stop key (BUZZER), but the remote alarm
cannot be silenced.
￭ After a power failure, the unit will resume operation with the set value that was in place before power
failure occurred.
