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SK2019 FSTD-SLIM-EC-FLEX-001_01
Low Temperature Protection of Indoor Coil (Parameter 16=0)
a)
If Ti1 ≤ 2 ºC for 2 minutes, then MTV1 and AUX1 are turned off. If indoor fan is set for low speed, then it will run at medium
speed. If it is set at medium or high speed, then it will keep running at the same speed.
b)
If Ti1 ≥ 5 ºC for 2 minutes, then MTV1 and AUX1 are turned on. Indoor fun runs at set speed.
2) Fan mode
a)
Indoor fan runs at the set speed while heater, MTV1, MTV2, AUX1 and AUX2 are turned off.
b)
Indoor fan speed can be adjusted for low, medium and high.
3) Heat mode
a)
If Tr ≤ Ts- 1 ºC (Parameter 5 setting), then heat operation is activated and MTV1 and AUX2 are turned on. Indoor fan
runs at the set speed.
b)
If Tr > Ts, heat operation is terminated and MTV1 and AUX2 are turned off. Indoor fan is turned off.
c)
The range of Ts is 16 - 30 ºC or fixed according to Parameter 4 setting.
d)
Indoor fan speed can be adjusted for low, medium, high and auto.
Anti-frozen protection in winter
If Tr<5ºC when unit is OFF, thermostat will be turned on to heating mode. When Tr>8ºC, thermostat will turned OFF.
4) SLEEP MODE
a) When sleep mode is turned ON:
Setting temperature point will increase by 0.5 ºC every 30 min in cooling mode, after 3 hours, the setting point will increase
by 3°C, the setting point is not increased.
Setting temperature point will decrease by 0.5 ºC every 30 min in heating mode, after 3 hours, the setting point will decrease
by 3°C, the setting point is not decreased.
b) When sleep mode is turned OFF, the setting point will be reset to pre-setting level.
5) Auto Fan Speed
COOL MODE
HEAT MODE
Fan speed cannot change until it has run at this
speed for more than 30 seconds.
Fan speed cannot change until it has run at this
speed for more than 30 seconds.
After 30 seconds the fan speed is modulated according to the difference between the room temperature and the set
temperature. The controller adjusts the motor signal input from 0 to 5VDC by PID calculation every 10 seconds. The air flow is
adjusted from 15% to100%
6) EC FAN CONTROL SIGNAL (Parameter 19=0)
Fan is set at high speed, DA1 output is according to Modbus address 310003 setting.
Fan is set at medium speed, DA1 output is according to Modbus address 310002 setting.
Fan is set at low speed, DA1 output is according to Modbus address 310001 setting.
Fan is set auto speed, DA1 is based on Tr, Ts PI calculation.
Minimum DA1 output is according to Modbus address 310000 setting.
