12
HEATING Mode
Compressor Control
1 Reach the configured temperature:
S If the following conditions are satisfied, the compressor
ceases operation.
S While the calculated frequency(fb) is less than the
minimum limit frequency(FminC).
S When the protective time is more than or equal to
ten minutes.
S When T1 is higher than or equal to
Tsc+HDIFTEMP2.
NOTE: HDIFTEMP2 is the EEPROM setting parameter. It is 4_F
(2
_C) usually.
S If one of the following conditions is satisfied, regardless
of time.
S Compressor running frequency is more than test
frequency.
S When the compressor running frequency is equal
to the test frequency, T4 is more than 59
_F (15_C) or
no T4 or T4 fault.
S Change the setting temperature.
S Turbo or sleep function on or off.
2 When the current is higher than the predefined safe value,
the surge protection is activated, causing the compressor to
cease operations.
Indoor Fan Control
1 In the HEATING mode, the indoor fan operates
continuously. The fan speed can be set to 1%−100%, or
muted.
2 AUTO fan
S Rise curve
S When T1−Tsc is higher than −3_F (−1.5_C), fan
speed reduces to 80%;
S When T1−Tsc is higher than 0_F (0_C), fan speed
reduces to 60%;
S When T1−Tsc is higher than 1_F (0.5_C), fan
speed reduces to 40%;
S When T1−Tsc is higher than 2_F (1_C), fan speed
reduces to 20%.
S Descent curve
S When T1−Tsc is lower than or equal to 1_F
(0.5
_C), fan speed increases to 20%;
S When T1−Tsc is lower than or equal to 0_F (0_C),
fan speed increases to 60%;
S When T1−Tsc is lower than or equal to −3_F
(−1.5
_C), fan speed increases to 80%;
S When T1−Tsc is lower than or equal to −6_F
(−3_C), fan speed increases to 100%.
Outdoor Fan Control
S The outdoor unit runs at a different fan speed according
to T4 and compressor running frequency.
S For different outdoor units, the fan speeds differ.
DEFROSTING Mode
S The unit enters defrosting mode according to changes in
the temperature value of T3 as well as the compressor
running time.
S In defrosting mode, the compressor continues to run, the
indoor and outdoor blower and fan motors will cease
operation, the defrost light of the indoor unit will turn
on, and the
“ ”
symbol appears.
S If any one of the following conditions is satisfied,
defrosting ends and the machine switches to the normal
HEATING mode:
S T3 rises above TCDE1_C.
S T3 maintained above TCDE2_C for 80 seconds.
S Unit runs for 15 minutes consecutively in the
DEFROSTING mode.
Evaporator Temperature Protection
S Off: Compressor stops.
S Decrease: Decrease the running frequency to the lower
level per 20 seconds.
S Hold: Keep the current frequency.
S Resume: No limitation for frequency.
AUTO Mode
S
This mode can be selected with the remote controller
and the setting temperature can be changed between
60_F~86_F (16_C~30_C).
S In the AUTO mode, the machine selects the COOLING,
HEATING, AUTO−DRYING or FAN−ONY mode on
the basis of T1,Ts, T4 and relative humidity.
S If the setting temperature is modified, the machine selects
a new running function.
DRY Mode
In the DRY mode, the air conditioner operates the same as auto fan
in the COOLING mode.
1 Mute function is active.
S All protections are activated and operate the same as they
do that in COOLING mode.
2 Low Room Temperature Protection
S If the room temperature is lower than 50_F (...) 10_C,
the compressor ceases operations and does not resume
until the room temperature exceeds 54
_F (...) 12_C.
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