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SK2017 AHRI PFWSL-V/P-AECM-001
POST HEAT
Without Electrical Heater
a)
If Ti2 ≥ 100 ºF, when MTV2 and AUX 1 are off, indoor fan continues to run at set speed.
b)
If 97
F ≤ Ti2 ≤ 100
F, when MTV2and AUX1 are off. Indoor fan keeps original state.
c)
If Ti2 < 97ºF, MTV2 and AUX1 are off. Indoor fan runs at 200 rpm.
d)
If indoor coil temperature coil is damaged, post-heat time is set for 3 minutes with indoor fan running at set speed.
With Electrical Heater
a)
Indoor fan will turn off after the unit off for 20 seconds.
OVER HEAT PROTECTION OF INDOOR COIL
a)
If Ti2 ≥ 167 ºF, MTV2 and AUX1 are turned off, indoor fan remains on and runs at high speed.
b)
If Ti2 < 158 ºF, MTV2 and AUX1 are turned on, indoor fan remains on and runs at set speed.
c)
If indoor coil temperature sensor is damaged, the protection mode will become obsolete and the unit will work as the
Pre-heat and Post-heat set times.
DEHUMIDIFICATION MODE
a)
MTV2, AUX1 and heater always off.
b)
If Tr ≥ 77 ºF, MTV1 and AUX2 will be ON for 3 minutes, and OFF for 4 minutes.
c)
If 61 ºF ≤ Tr < 77 ºF, MTV1 and AUX2 will be ON for 3 minutes, and OFF for 6 minutes.
d)
If Tr < 61 ºF, MTV1 and AUX2 will be turned off for 4 minutes.
e)
At the end of the above dehumidification cycle, system will decide the next dehumidification control option. Indoor fan
will run at low speed throughout the dehumidification process.
AUTOMODE
a)
If current running mode is AUTO COOL mode, it will change over to AUTO HEAT mode upon satisfy all the conditions
below:
i.
Ts - Tr ≥ 1.8°F (or -7.2 ºF if economy contact is activated)
ii.
MTV1 has stop
≥
10 min.
b)
If current running mode is AUTO HEAT mode, it will change over to AUTO COOL mode upon satisfy all the conditions
below:
i.
Tr - Ts ≥ 1.8°F (or +7.2 ºF if economy contact is activated)
ii.
MTV2 has stop
≥
10 min.
Note: AUTO COOL or AUTO HEAT operations are the same as COOL or HEAT mode respectively.