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SK2019 FMCD-V-ECM-001
PRE-HEAT
Without Electrical Heater
a)
MTV1, MTV2 and AUX2 are off.
b)
If Ti1 < 36ºC (or > 28ºC is selected by DIPB-S2 position SW4), then AUX1 is turned on while indoor fan remains off.
c)
If Ti1 ≥ 38ºC (or < 30ºC is selected by DIPB
-S2 position SW4), then AUX1 is turned on while indoor fan runs at set
speed.
d)
If the indoor coil temperature sensor is damaged, then the pre-heat time is set for 2 minutes and the indoor fan runs
at set speed.
With Electrical Heater
a)
If the indoor fan speed ≥
Modbus 310000 setting, then the electrical heater will turn on.
POST-HEAT
With and Without Electrical Heater
a)
AUX1 is turned off. Electrical heater is turned off.
b)
Indoor fan will shut down after the unit has been turned off for 20 seconds.
LOW TEMPERATURE PROTECTION OF INDOOR COIL
a)
If Ti
1 ≤ 2ºC for 2 minutes, then AUX2 is turned off. If indoor fan runs at low speed, then it will run at medium speed.
If indoor fan runs at medium or high speed, then it will run at set speed.
b)
If Ti1 ≥ 5ºC for 2 minutes, then AUX2 is turned on. Indoor fan run
s at set speed.
OVER-HEAT PROTECTION OF INDOOR COIL
a)
If Ti1 ≥ 75ºC, then AUX1 is turned off. Indoor fan remains on and runs at high speed.
b)
If Ti1 < 70ºC, then AUX1 is turned on. Indoor fan remains and runs at set speed.
c)
If the indoor coil temperature sensor is damaged, then the protection mode will be overridden and the unit will work
according to the pre-heat and post-heat program.
DEHUMIDIFICATION MODE
a)
MTV1, MTV2, AUX1 and heater are always off.
b)
If Tr ≥ 25ºC, then the indoor fan and AUX2 will be turned
on for 3 minutes, and then off for 4 minutes.
c)
If 16ºC ≤ Tr < 25ºC, then the indoor fan and AUX2 will be turned on for 3 minutes, and then off for 6 minutes.
d)
If Tr < 16ºC, then the indoor fan and AUX2 will be turned off for 4 minutes.
e)
At the end of the above dehumidification cycle, the system will decide the next dehumidification control option.
Indoor fan will run at low speed throughout the dehumidification process.
AUTO-MODE
Not available.