User Manual

6
When the measured temperature PV≤TS (temperature
set value), the cool indicator lamp will off, and the
refrigeration relay stops working.
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
press
ed.
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.
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 refrigerat
ion
equipment is under compressor delay protection status.
In case the time interval between two refrigeration is less
than PT, please refer to 6.3.
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）,
system enters heating status; when the temperature raised
to 25°C(TS), stop heating.
When the measured temperature PV≤TS (temper
ature 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.