22
ALARM FUNCTIONS
This unit has the alarm functions shown below.
Alarms
Situation
Indication
Alarm buzzer
Remote alarm
High temp.
alarm
If the chamber temp. is higher
than the high temp. alarm
setting.
Alarm indicator blinks.
Chamber temp. blinks.
Intermittent tone with
15 minutes delay.
Alarm status with
15 minutes delay.
Air circulation
alarm
If the chamber temp.
distribution gets worse.
(chamber temperature at upper
area is high)
Alarm indicator blinks.
Intermittent tone with
15 minutes delay.
Alarm status with
15 minutes delay.
Low temp.
alarm
If the chamber temp. is lower
than the low temp. alarm
setting.
Alarm indicator blinks.
Chamber temp. blinks.
Intermittent tone with
15 minutes delay.
Alarm status with
15 minutes delay.
0
o
C alarm
If the chamber temp. is lower
than 0
o
C.
Alarm indicator blinks.
Chamber temp. blinks.
Intermittent tone
Alarm status.
Power failure
alarm
At power failure.
If the power supply cord is
unplugged.
----- -----
Alarm
status.
Power failure
alarm
(with MPR-48B1)
At power failure.
If the power supply cord is
unplugged.
Alarm indicator blinks.
Intermittent tone
Alarm status.
Door alarm
When the door is open.
Door check indicator
blinks.
Intermittent tone with
2 minutes delay.
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The alarm status of remote alarm terminal is cancelled by pressing the alarm buzzer stop key
(BUZZER) since the remote alarm is operated in conjunction with alarm buzzer. (except for power failure
alarm status)
Air circulation alarm
The alarm indicator blinks and the alarm buzzer sounds (after 15 minutes) when the sensor detects that
the chamber temperature distribution is getting worse extremely. This may be caused by the block of
cold air in the chamber due to the frost on the evaporator or stop of cooling fan motor.
The air circulation is detected by the exclusive alarm sensor attached to the upper area of the
chamber.
