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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 blinks.
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.
If the thermal sensor is
disconnected.
Alarm lamp blinks.
E01 and 50
o
C is
displayed alternately.
If the thermal sensor is
shirt-circuited.
Alarm lamp blinks.
E02 and -170
o
C are
displayed alternately.
Intermittent
tone
Remote alarm
Continuous
operation
If the cascade sensor is
disconnected.
Alarm lamp blinks.
E03 and chamber temp.
are displayed alternately.
If the cascade sensor is
shirt-circuited.
Alarm lamp blinks.
E04 and chamber temp.
are displayed alternately.
Intermittent
tone
Remote alarm
If the filter sensor is
disconnected.
Alarm lamp blinks.
E05 and chamber temp.
are displayed alternately.
If the filter sensor is
short-circuited.
Alarm lamp blinks.
E06 and chamber temp.
are displayed alternately.
Intermittent
tone
Remote alarm
If the ambient temperature
sensor is disconnected.
Alarm lamp blinks.
E07 and chamber temp.
are displayed alternately.
Sensor
abnormality
If the ambient temperature
sensor is short-circuited.
Alarm lamp blinks.
E08 and chamber temp.
are displayed alternately.
Intermittent
tone
Remote alarm
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䋺
The filter check lamp sometimes blinks at the start-up under high ambient temperature. The lamp is off
when the chamber temperature is getting lower.
The error alarm explanation of the thermal sensor (in the chamber).
Indicated value
Contents of a trouble
E01 When sensor lead wire (red) opened.
When sensor lead wire (red)
short-circuited.
E02
When sensor lead wire (white) or
(black) opened.
RED
BLACK WHITE