and exit settings, back to temperature display and operate according to new parameter
settings. After 20 seconds of inactivity, the controller will also exit setting status
automatically without saving the change. (In parameter setting status, the system operates
based on the previous settings.)
3. Quick Reset to Default
Press and hold ▲ and ▼ to power on the controller. After 3 seconds, it displays rE,
indicating all the set values have be reset to the defaults and the controller will return to
normal working status in three seconds.
4. Check Room Temperature
In non-setting status, press ▼ to display the value read by room temperature sensor, and
then the water temperature after 6 seconds. (At this time, D1 flashes, indicating room
temperature is displayed.)
5. Quick Settings
Press SET when the controller works normally. The panel displays the value of parameter F0
(temperature set-point) in constant temperature control mode, and that of parameter F1
(temperature difference) in intelligent temperature control mode. (LED D1 flashes, indicating
the controller is in parameter setting status.) Press ▲ and ▼ to change the set-point, press
SET again or keep the controller inactive for 20 seconds to exit without saving the settings.
Or press RST to exit with new settings saved.
Cooling Control
Chiller Status Compressor
Status
Cooling
ON
Micro
ON
Cooling
Not Cooling OFF
Refrigerant
Solenoid
Status
Cut Off
Cut In
Remark
Valve
100% power cooling
10% power cooling
Cut In
No Cooling
The above table lists the three working status of the chiller controlled by the smart
temperature controller. It takes about 5 to 10 seconds for transition between cooling and
micro cooling, i.e. many times in a minute. If the heat load is turned on, the chiller mainly
works in these two statuses, precisely controlling the temperature of the cooling water. (The
water temperature fluctuates about 0.3℃ in the actual test.) When the heat load is off, the
water temperature will overshoot. When the water temperature equals A0 set-point, the
compressor is switched off.
Note: There is a time difference between the chiller status transition and water temperature
change. Please use the parameter A6 (System inertia coefficient) to reduce the water
temperature overshoot and accurately control the temperature.
Compressor: When the temperature = water temperature set-point + cooling differential,
and compressor protection delay exceeds the set time, the compressor starts to operate.
When the temperature = water temperature set-point - heating differential, the compressor
stops operating.
Solenoid valve: When the compressor is operating, the temperature ≤ water temperature
set-point, and the solenoid valve cut-off duration > status transition delay (A3), the
solenoid valve cuts in. When the temperature > water temperature set-point, and the
