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SK2019 FMCD-V-ECM-001
POST-HEAT
Without Electrical Heater
a)
If Ti2
≥
38ºC, then MTV2 and AUX 1 are turned off. Indoor fan continues to run at set speed.
b)
If 36
F ≤
Ti2 ≤ 38
F, then MTV2 and AUX1 are turned off. Indoor fan maintain its original state.
c)
If Ti2 < 36ºC, then MTV2 and AUX1 are turned off. Indoor fan runs at Modbus 310000 setting.
d)
If the indoor coil temperature sensor is damaged, then the post-heat time is set for 3 minutes. Indoor fan running at
set speed.
With Electrical Heater
a)
Indoor fan runs at 200RPM after the unit has been turned off for 20 seconds.
LOW TEMPERATURE PROTECTION OF INDOOR COIL
a)
If Ti1 ≤ 2ºC for 2 minutes, then MTV1 and AUX2 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 ≥ 5ºC for 2 minutes, then MTV1 and AUX2 are turned on. Indoor f
an runs at set speed.
OVER HEAT PROTECTION OF INDOOR COIL
a)
If Ti2 ≥ 75ºC, then MTV2 and AUX1 are turned off. Indoor fan remains on and runs at high speed.
b)
If Ti2 < 70ºC, then MTV2 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 set times.
DEHUMIDIFICATION MODE
a)
MTV2, AUX1 and heater are always off.
b)
If Tr ≥ 25ºC, then MTV1 and AUX2 will be turned on for 3 m
inutes, and then off for 4 minutes.
c)
If 16ºC ≤ Tr < 25ºC, then MTV1 and AUX2 will be turned on for 3 minutes, and then off for 6 minutes.
d)
If Tr <16ºC, then MTV1 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
a)
If the current running mode is AUTO COOL mode, it will change over to AUTO HEAT mode upon satisfying all the
conditions below:
i.
Ts
–
Tr
≥
1°C (or
–
4ºC if economy contact is activated).
ii.
MTV1 has stopped
≥
10 minutes.
b)
If the current running mode is AUTO HEAT mode, it will change over to AUTO COOL mode upon satisfying all the
conditions below:
i.
Tr -
Ts ≥ 1°C (or + 4ºC if economy contact is a
ctivated).
ii.
MTV2 has stopped
≥
10 minutes.
Note: AUTO COOL or AUTO HEAT operations are the same as COOL or HEAT mode respectively.