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SK2017 AHRI PFWSL-V/P-AECM-001
Without Valve Configuration
COOL MODE
a)
Electric heater, AUX1, MTV1 and MTV2 are always off.
b)
If Tr ≥ Ts+1.8 ºF (or +7.2ºF if economy contact is activated), cool operation is activated, AUX2 is on. Indoor fan runs at set
speed.
c)
If Tr < Ts, cool operation is terminated, AUX2 is off. Indoor fan is turned off.
d)
The range of Ts is 61-86 ºF
e)
Indoor fan speed can be adjusted for low, medium, high and auto.
Note: When the unit is turned off, indoor fan will delay for 5 seconds before it is turned off.
LOW TEMPERATURE PROTECTION OF INDOOR COIL
a)
If Ti1 ≤ 36 ºF for 2 minutes, AUX2 is off. If low speed is selected via user interface, indoor fan runs at medium speed. If
medium or high speed is selected via user interface, indoor fan runs at set speed.
b)
If Ti1 ≥ 41 ºF for 2 minutes, AUX2 is on. Indoor fan runs at set speed.
FAN MODE
a)
Indoor fan runs at the set speed while heater, AUX1, AUX2, MTV1 and MTV2 are turned off.
b)
Indoor fan speed can be adjusted for low, medium and high.
HEAT MODE
Heat mode without electrical heater
a)
MTV1, MTV2, AUX2 and heater always off.
b)
If Tr ≤ Ts-1.8 ºF (or -7.2 ºF if economy contact is activated), heat operation is activated, AUX1 is turned on. Indoor fan runs
at the set speed.
c)
If Tr > Ts, heat operation is terminated, AUX1 is turned off. Indoor fan runs at 200rpm.
d)
The range of Ts is 61-86 ºF.
e)
Indoor fan speed can be adjusted for low, medium, high and auto.
Heat mode with electrical heater as booster
a)
MTV1, MTV2 and AUX2 are always off.
b)
If Tr ≤ Ts-1.8 ºF (or -7.2 ºF if economy contact is activated), heat operation is activated, AUX1 is turned on. Indoor fan runs
at the set speed.
c)
If Tr > Ts, heat operation is terminated, AUX1 is turned off. Indoor fan runs at 200 rpm.
d)
If Ti1 < 104 ºF, the electrical heater is turned on. If 104 ≤ Ti1 < 113 ºF, the electrical heater is kept original state. If Ti1 ≥
113 ºF, the electrical heater is turned off.
e)
The range of Ts is 61-86 ºF.
f)
Indoor fan speed can be adjusted for low, medium, high and auto.
PRE-HEAT
Pre-heat with electrical heater
a)
Indoor fan will turn on after the electrical heater is turned on for 10 sec.
POST-HEAT
Post-heat with and without electrical heater
a)
AUX1 is off. Electrical heater is turned off.
b)
Indoor fan will turn off after the unit is turned off for 20sec.
Over heat protection of indoor coil in post-heat
a)
If Ti1 ≥ 167ºF, AUX1 is turned off, indoor fan remains on and runs at high speed.
b)
If Ti1 < 158 ºF, AUX1 is turned on, indoor fan remains 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 program.
DEHUMIDIFICATION MODE
a)
MTV1, MTV2, AUX1 and heater always off.
b)
If Tr ≥ 77 ºF, indoor fan and AUX2 will be ON for 3 minutes, and OFF for 4 minutes.
c)
If 61 ºF ≤ Tr < 77 ºF, indoor fan and AUX2 will be ON for 3 minutes, and OFF for 6 minutes.
d)
If Tr < 61 ºF, indoor fan 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:
Not available.