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SK2019 FMCD-V-ECM-001
With Electrical Heater as Primary Heat Source
a)
MTV1, MTV2, and AUX2 are always off.
b)
If Ti2
≤
30ºC (or Ti2 is damaged or not connected)
i.
If Tr ≤ Ts
﹣
1ºC (or
–
4ºC if economy contact is activated), then heat operation is activated and the electrical
heater and AUX1 are turned on. Indoor fan runs at set speed.
ii.
If Tr > Ts, then heat operation is terminated and the electrical heater and AUX1 are turned off. Indoor fan runs
at Modbus 310000 setting.
c)
If Ti2 > 30ºC, MTV2 and AUX2 are off.
i.
If Tr ≤ Ts
﹣
1ºC (or
–
4ºC if economy contact is activated), then heat operation is activated and the electrical
heater is turned off while MTV1 and AUX1 are turned on. Indoor fan runs at set speed.
ii.
If Tr > Ts, then heat operation is terminated and MTV1 and AUX1 are turned off. Indoor fan runs at Modbus
310000 setting.
d)
The range of Ts is 16 - 30ºC.
e)
Indoor fan speed can be adjusted to low, medium, high and auto.
PRE-HEAT
Without Electrical Heater
a)
If Ti1 < 36ºC [or < 28ºC is selected by DIPB-S2 position SW4], then MTV1 and AUX1 are turned on, indoor fan runs at
Modbus 310000 setting.
b)
If Ti1 ≥ 38ºC [or ≥ 30ºC is selected by DIPB
-S2 position SW4], then MTV1 and AUX1 are turned on, indoor fan runs at
set speed.
c)
If the indoor coil temperature sensor is damaged, then the pre-heat time is set for 2 minutes. Indoor fan runs at set
speed.
With Electrical Heater
a)
If the indoor fan speed ≥ 300rpm, then the electrical heater will turn on.
POST-HEAT
Without Electrical Heater
a)
If Ti1 ≥ 38ºC, then MTV1 and AUX 1 are off, then indoor fan continues to run at set speed.
b)
If 36ºC ≤ Ti1 ≤ 38ºC, then MTV1
and AUX1 are turned off. Then indoor fan maintains its original state.
c)
If Ti1 < 36ºC, then MTV1 and AUX1 are turned off. Then indoor fan runs at 200rpm.
d)
If the indoor coil temperature sensor is damaged, then the post-heat time is set for 3 minutes. Indoor fan runs at set
speed.
With Electrical Heater
a)
Indoor fan will be turned OFF after the unit has been turned off for 20 seconds.
OVER-HEAT PROTECTION OF INDOOR COIL
a)
If Ti1 ≥ 75ºC, then MTV1 and AUX1 are turned off. Indoor fan remains on and runs at high s
peed.
b)
If Ti1 < 70ºC, then MTV1 and AUX1 are turned on. Indoor fan remains on 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.