Astralpool TIT-20 KW Manual Tecnico página 15

ENGLISH
Basic Operating Principle
Temperature controlling
The controller has a temperature controlling mode.
Temperature controlling point is controlled by "setting temperature (F11, or
press the "set" key for some time to set and temperature difference "(F12)".
While heating, the controller begins to heat when the temperature of the
temperature sensor is under "setting temperature – differential temperature",
and it stops heating when the temperature is over "setting temperature +
differential temperature"
Water pump delay time
The water pump delay time is set by F21, for example, 3 minutes. The controller
contains a "water pump halt calculagraph", and it begins to time when water
pump stops, the program first check the calculagraph before booting the water
pump next time, the program will immediately boot the water pump if the
calculagraph reach 3 minutes.
If the calculagraph doesn't reach 3 minutes, it will boot again when the
calculagraph reaches 3 minutes. Thus you can ensure that the boot alternation
is over 3 minutes after halt, so it can prevent to breaking the water pump as a
result of frequent boot. In addition, the controller doesn't boot the water pump
within 3 minutes after turning on the power supply, thus the water pump can
also be protected in the state of power cut and then power on.
External alarm
The controller can connect a switching value as external alarm source (Pin 4,
5), when the external alarm occurs, the controller stops, displays
the alarm code "A11" and generates alarm output. External alarm signal has 5
modes (F50):
· 0: without external alarm
· 1: always open, unlocked
· 2: always open, locked
· 3: always closed, unlocked
· 4: always closed, locked
"Always open" means in normal state, external alarm signal is open, if closed,
the controller will give an alarm; "Always closed" is on the contrary. "Locked"
means that when external alarm signal becomes normal, the controller is still in
the alarm state, and it needs to press any key to resume.
Probation time
A probation time can be set (F87), the controller can add up the running time
after power is on, if the accumulative running time is over the probation time,
the controller will stop and display the alarm code A99, if you want to eliminate
the limit of probation time, set the F87 to "OFF", also you can use the F86 to
clear the accumulative running time, and you can try to use it again. The
parameter F85 can be used to examine the accumulative running time of the
controller (hour).