Shenzhen Envicool Technology Co., Ltd.
Caution：The maximum capacity of emergency fan
dry contact are as follows: 8A/ 220V AC。
Door open alarm input connecting
interface diagram:
Electrical connection check:
1) Check whether any short circuit or open circuit
exists on the AC power supply cables with
multimeter.
2) Check whether any short circuit or open circuit
exists on the communication & alarm output
cable multimeter.
3.3 Power-on steps
Close the AC input power switch, Waited 30s ,The
internal cycle fan of the air conditioner will be
started. If the internal cycle temperature meets the
running condition, the cooling system will be
started.
4. System function introduction
Air conditioner running is automatically controlled
completely according to the temperature inside the
cabinet, and through the inner loop temperature
sensor, the controller detects the cabinet return air
temperature and the set point for judgment, to
control the work of compressor or the fan.
4.1 Cooling
Cooling startup point = cooling stop point + cooling
sensitivity. When the cabinet internal temperature
exceeds the cooling startup point, the cooling will
be started; when the cabinet internal temperature
is lower than the cooling stop point, the cooling
stops.
Parameter Default value Setting range
CoolSP
30℃ [15~55]
Cool △T
5℃ [1~10]
INHT
55 ℃ [30~70]
Setting point description:
CoolSP: Point when cooling stops.
Cool △T: Temperature control sensitivity.
INHT: Internal high Temp. alarm point.
CAUTION!
For the reliable operation of the unit and the
maximum energy efficiency, it is recommended
that the users should not randomly change the
temperature set point. The above set point is not
on behalf of the factory settings.
4.2 The control of external fan
According to the requirement for the environment
inside the cabinet, the external fan realizes
automatic cycle hydrogen discharging and forced
ventilation.
Forced ventilation (Option) : when the compressor
does not have cooling capacity or the temperature
inside the cabinet is higher than “INHT” point , and
the temperature inside the cabinet is 4ºC higher
than that outside the cabinet, start the hydrogen
discharging fan.
4.3 Door alarm
To avoid an increase in condensation, a door
operated switch should be used which will switch
the air conditioner off when the switch the air
conditioner off when the enclosure door is opened
(see: ●Door open alarm input connecting
interface diagram:);
After judging whether the cabinet door is opening
or not by the sign sent by the door magnetic
switch ,the air conditioner will alarm and stop.
CAUTION
When door opened, the door magnetic
switch will be triggered to shut down the air
conditioner after one minute. After door closed, the
door magnetic switch will be released, then the air
conditioner will start work after three minutes when
the temperature inside is higher than the set point.
EIA series air conditioner user manual
9
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