Installation and Commissioning Guide - Package Ducted Variable Capacity Commercial
Doc. Part No. 0525-076 Ver. 3 210414
Installation and Commissioning Guide
Variable Capacity Commercial
32
15.04.03. Reduced Airflow
This feature allows the system to run at lower airflow down to 20% (below system normal application range) when
the compressor is not active (cycle off). This feature is useful to reduce the indoor fan power consumption during
system operation but maintain the essential air circulation in the room. Note that if Continuous Fan is enabled, it
takes precedent over the Reduced Airflow.
The available airflow range of reduced airflow is presented on the fan table Reduced Airflow (Compressor Off) on
the next pages. By default, this option is enabled and set to
20
PWM. To turn OFF or change the PWM value:
Option 1: LC7-2 Wall Control
1. Press and hold the
REPEAT
and the
TIMER
buttons for 3 sec then release to enter Service Menu. The display will
show the Service Menu
01
.
2. Press the
or
buttons to scroll to Service Menu
03
. Press the
PROG
button to enter the Service Menu
03
.
3. Press the
PROG
button 10 x times to enter the Reduced Airflow Settings.
4. Press the
or
buttons to select the desired indoor fan PWM then press the
PROG
button to accept.
The available range is from 20 to 100. OFF means that this function is disabled. The sample screen below shows
the indoor fan is set to 30 PWM.
5. Press the
EXIT
button once to go back to the original status display.
Option 2: Outdoor Unit CPU Board
1. Using the
MENU
and the
ENTER
buttons, navigate to
SEt
(Settings)
→
iduS
(Indoor Settings)
→
FPc
(Reduced
PWM)
2. Keep pressing the
MENU
button to select the desired indoor fan speed PWM is shown. By default, the indoor fan
PWM is set to
20
and it is adjustable from
20-100
.
Note:
0
means the Reduce Airflow Mode is disabled.
3. Press the
ENTER
button to confirm the PWM settings.
4. Press the
BACK
button three times to go back to the original status display.
15.04.04. Hot Start (Draft Reduction)
Hot Start is a feature only applicable in the heating cycle, that delays the indoor fans start-up. This allows the indoor
coil to heat up before the indoor fan starts so an initial cold draft is prevented. When Hot Start is disabled the
compressor and fan will start at approximately the same time.
LC7-2 Wall Control
1. Press and hold the
REPEAT
and
TIMER
buttons for 3 seconds then release to enter Service Menu. The display will
show Service Menu
01
.
2. Press the
or
buttons to scroll to Service Menu
03
. Press the
PROG
button to enter the Service
Menu
03
.
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