17
ALARMS & SAFETY FUNCTIONS
Table 4. Alarm and safety function
Alarm & safety
Situation
Indication
Buzzer
Safety operation
Filter check
When the condenser filter
is clogged.
Filter check lamp
flashed.
Intermittent
Tone.
-----
Auto-return
When there is no key
pressing in each setting
mode for 90 seconds.
Chamber temp. is
displayed.
-----
Finishing of each
setting mode.
Sensor
abnormality
If the thermal sensor is
disconnected.
Alarm lamp flashed.
E01 and 50
o
C is
displayed alternately.
Intermittent
tone
Remote alarm
Continuous
operation
If the thermal sensor is
shirt-circuited.
Alarm lamp flashed.
E02 and -170
o
C are
displayed alternately.
If the cascade sensor is
disconnected.
Alarm lamp flashed.
E03 and chamber temp.
are displayed alternately. Intermittent
tone
Remote alarm
If the cascade sensor is
shirt-circuited.
Alarm lamp flashed.
E04 and chamber temp.
are displayed alternately.
If the filter sensor is
disconnected.
Alarm lamp flashed.
E05 and chamber temp.
are displayed alternately. Intermittent
tone
Remote alarm
If the filter sensor is
short-circuited.
Alarm lamp flashed.
E06 and chamber temp.
are displayed alternately.
If the ambient temperature
sensor is disconnected.
Alarm lamp flashed.
E07 and chamber temp.
are displayed alternately.
Intermittent
tone
Remote alarm
If the ambient temperature
sensor is short-circuited.
Alarm lamp flashed.
E08 and chamber temp.
are displayed alternately.
Condenser temp.
abnormality
In the event of failure of fan
motor for cooling the
compressor
E10 and chamber temp.
are displayed alternately.
Intermittent
tone
Remote alarm.
Compressor of high
stage side stops.
Battery life
About 3 years after turning
on the power switch.
F1 and chamber temp.
are displayed alternately.
----- -----
Filter life
About 6 years after turning
on the power switch.
F2 and chamber temp.
are displayed alternately.
----- -----
Note
：
The filter check lamp sometimes flashed at the start-up under high ambient temperature. The lamp is off
when the chamber temperature is getting lower.
• The battery for power failure alarm is an article for consumption. It is recommended that the battery
will be replaced about every 3 years. Contact our sales representative or agent at the time of
replacement of the battery.
• Fan motor is expendable supplies. Replace it for about every 6 years. Contact our sales
representative or agent at the time of replacement of the fan motors.
The error alarm explanation of the thermal sensor (in the chamber).
Indicated value
Contents of a trouble
E01
When sensor lead wire (red) is opened.
E02
When sensor lead wire (red) is
short-circuited.
When sensor lead wire (white) or (black)
is opened.
RED
BLACK WHITE
