OHM ELECTRIC COOL CABI OCA-S2300AC, Инструкция по эксплуатации, Страница: 37 / 44

15
5. Alarm/Safeguard
5-1 Alarm
(1) E1
：
High Temp. Alarm
When the internal temperature reaches 45
℃
(factory setting), the alarm output
terminals will break and make contact as set in AS and Ao to light alarm lamp (See the
assignment table of alarm output terminals in page 12). The display shows the current
internal temperature and E1 by turns to indicate that the internal temperature is too
high. Cooling operation will be continued.
When the internal temperature falls to 43
℃
(factory setting) or lower, the alarm output
contact returns to the original state and the alarm lamp turns off.
(2) E3
：
Radiation Error Alarm
If the cooling unit radiates too much heat due to some problems like clogged filters or
fins or fan failure, the overheat detector in the refrigerant circuit is activated to stop
cooling operation. The alarm output terminals will break and make contact as set in AS
and Ao to light alarm lamp (See the assignment table of alarm output terminals in page
12). The display shows the current internal temperature and E3 by turns to indicate
abnormal radiation.
Clean the filters and the fins or replace the fan and then press the SET button of the
temperature controller for more than 3 seconds to cancel the alarm. The cooling unit will
restart operation.
Caution
Be sure to disconnect power and wait until the fans stop completely.
(3) E4
：
Maintenance reminder
When the cumulative operating hour reaches the set value, the alarm output terminals
will break and make contact as set in AS, Ao and Fo to light alarm lamp (See the
assignment table of alarm output terminals in page 12). Current internal temperatures
and E4 are displayed by turns to remind you to carry out maintenance work. Cooling
operation will be continued.
After completion of maintenance of filter and others, press SET button to cancel the
alarm.
Change of the parameter for this function makes the cumulative hours by that time zero
and operating hours are counted anew.
(4) E5
：
Temperature Sensor Disconnection Alarm
Cooling operation will stop in the event of disconnection of the internal temperature
sensor for some reasons. The alarm output terminals will break and make contact as set
in AS and Ao to light alarm lamp (See the assignment table of alarm output terminals
in page 12). The display shows E5.
In the event of this failure, turn off the power immediately and contact your supplier.
①
Remove the screw cap for eyebolts
and the front cover.
②
Remove the top cover.
Thermal relay
RESET button
Thermal relay
③
Press RESET button to cancel