OHM ELECTRIC COOL CABI OCA-S2300AC, Instruction Manual, Page: 38 / 44

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(5) E6
：
Drainage Error Alarm
If drainage is disturbed due to clogging in the hose or other problem, the float switch
installed in the drain pan activates 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 alarm lamp (red) lights and display
shows the current internal temperature and E6 by turns to notice drainage error. By
eliminating the cause of problem, the cooling unit will automatically return to normal
operation.
(6) E7
：
Heat Exchanger Frozen Temp Sensor Alarm.
If the temperature of heat exchanger fin falls to 0
℃
, cooling operation will stop. 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 E7 by turns to notice freezing of it. Clean the fin
unit 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.
(7) E8
：
Heat Exchanger Temp. Sensor Disconnection Alarm.
In the event of temperature sensor disconnection on cooling side by some reasons, cooling
operation stops. 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 E8.
(8) SE
：
System Error
This error occurrs when the parmeters cannot be read correctly due to a memory fault.
The display shows SE only.
In the event of this failure, turn off the power immediately and contact your supplier.
(9) tE
：
Type Error
Contact the supplier.
5-2 Safeguard
As a safeguard, this product is designed to stop operation under an abnormal current or
temperature.
In this event, the alarm E1 or E3 will occur. If water level of the drain pan became too
high due to clogging of the primary drain pipe, the float switch provided in the drain pan
terminates cooling for prevention of excessive drain water. In this event, the alarmE6
will occur. This product has double pipe system to keep enclosure interior from accidental
water entry. Even if the primary drain pipe fails to discharge water due to pipe clogging,
the secondary pipe will compensate it.
When the temperature sensor provided in the heat exchanger on cooling side detects
freezing temperature due to fan failure or other problems, cooling operation stops to
prevent freeze-up of the heat exchanger. In this event, the alarm
E7 will occur
6. Maintenance
Caution
Be sure to disconnect power before carrying out any maintenance work.
Use the specified filter for replacement. Use of fine filters will cause
efficiency loss in heat releasing which leads to reduced cooling
performance and/or breakdown of the unit.
Cleaning and user maintenance shall not be made by children.
The appliance shall not be cleaned with a water jet.
The cooling circuit of COOLCABI has been filled with a required amount of refrigerant,
tested for leaks and subject to a trial run before delivery. Therefore, there is no need of
maintenance for the circuit. Depending on the environmental condition at the site of use,
check and clean the filter, if used, at least once a week. Clogging on filter may lead to
deterioration in cooling performance, or at worst, may cause shutdown of the unit
due to overloading on the compressor.
6-1 Filter cleaning/replacement