Palram IT-38 Manual Del Usuario página 7

When the measured temperature PV ≥ TS(temperature
set value) + CD (cooling differential value), system
enters refrigeration status, the cool indicator lamp will on,
and refrigeration relay starts to work; when the cool
indicator lamp is flickering, it means the refrigeration
equipment is under compressor delay protection status.
When the measured temperature PV≤TS (temperature
set value), the cool indicator lamp will off, and the
refrigeration relay stops working.
When the measured temperature PV≤TS (temperature set
value)-HD (heating differential value), system enter
heating status, the heat indicator lamp will on, and heating
relay starts to work; when the measured temperature PV≥
TS(temperature setting), the heat indicator lamp will of,
and heating relay stops working.
For example, set TS=25°C, CD=2°C , and HD=3°C, then
when measured temperature is higher or equal to 27°C
TS+CD , system enters refrigeration status; when
temperature decline to 25°C(TS), stop refrigeration; when
measured temperature is lower or equal to 22°C TS-HD ,
sy stem enters heating status; when the temperature raised
to 25°C(TS), stop heating.
In case the time interval between two refrigeration is less
than PT, please refer to 6.3.
6.2 Alarm High/Low Limit Setting (AH, AL)
When measured temperature is higher or equal to AH, high
temperature alarm will be triggered, buzzer will alarm with
tone "bi-bi-Biii" until the temperature is lower than AH or
any key is pressed.
When measured temperature is lower or equal to AL, low
temperature alarm will be triggered, buzzer will alarm with
tone "bi-bi-Biii" until the temperature >AL or any key is
pressed.
6.3 Compressor Delay (PT)
Under refrigeration mode, after power on, if the measured
temperature is higher than the value of setting temperature
(TS) plus cooling differential(CD), the equipment won't start
refrigeration immediately, but waiting for a delay time.
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