Control Panel Operation - Friedrich KUHL R-410A Service Manual

Control Panel Operation

Let's check out how to control your air conditioner. On the control panel,
just to the left of the POWER , is a liquid crystal display (LCD). All of the
control panel function buttons and mode icons can be viewed in Figure 1.
Power On – Press the button to turn on the air conditioner. The
power button will illuminate to indicate the power is on. The backlight on
the power switch will automatically dim to 20% intensity after 120 seconds
of inactivity. The remote control can also be used to turn power ON / OFF
(See Remote Control).
Display –
light. The back light has an automatic two (2) step dim function. After 120
seconds of inactivity, the display dims to 20% intensity. After an additional
120 seconds, the display switches off. Touching buttons will automatically
bring the display to full brightness.
There are four control push buttons on each side of the display.
SYSTEM Button – Allows the user to sequentially select,
, HEAT , and FAN ONLY
the display advances to the next mode. A new icon appears. At the same
time, the mode displays for two (2) seconds, then returns the display to
th e temperature set point for modes other than FAN. Note that on cool
only units, there are no HEAT
FAN MODE Button – Selects between automatic
operation. In the mode, the fan only turns on and off when the
compressor operates or the heat function is enabled.
In the SYSTEM FAN ONLY Mode,
mode, fans speed is determined by your selection on the
Figure 1
AUTO COOL
MODE MODE
SYSTEM
AU TO
FA N
AU TO
MODE
CONTINUOUS
AU TO
FA N
SPEED
SCHEDULE
BUTTONS SCHEDULE
ON/OFF
operation. Press the button and
and modes.
or
is not available. In the
button.
FAN
MAINTENANCE
HEAT ONLY
REQUIRED
MODE MODE
OUTDOOR TEMP
ROOM TEMP
M T W T F S S
WAKE
FAN SPEED Button
Depending on your model, you can select between LOW, MED, HIGH,
a d n M A X a d n A U
When the button is pressed, the fan speed is temporarily displayed
in the display window, plus a fan speed icon (triangle) changes to indicate
the new speed level. When auto is selected, fan speed automatically varies
depending on the set temperature on the control panel and the actual
room temperature. Let me explain. Say for example you're working in
your garage and you need to open the big door for several minutes. The
air conditioner will sense a wide difference between the set temperature
and the actual room temperature when this occurs the system fan speed
increases to MAX. The fan speed decreases (in step) as the temperature
difference decreases. When the set point temperature is reached the FAN
speed returns to the original setting.
SCHEDULE Button – The
and off. The current day of the week is indicated as a dot underneath
the day symbol. Pressing the
schedule function off. The schedule function comes preprogrammed with
Cool
recommended energy savings values (Addendum 1). The values may
be changed through the schedule program function (See Programmable
Thermostat).
UP and DOWN arrows – Pressing either
changes the desired room temperature. The factory preset lower and
upper limits are 63° F (16° C) and 99° F (37° C). These buttons are also
used to navigate between function options when using the User Menu or
Maintenance Mode.
BACK Button – h T
It takes the user back to the previous menu level and to save and exit.
DISPLAY/ENTER Button –
Menu and Maintenance Mode operation to select items. This button may
also be used to alternatively display the ROOM TEMPERATURE,
OUTDOOR TEMPERATURE, and TIME. If the display is left inactive for
10 seconds it will reset to the TEMPERATURE SET POINT.
FRONT
PANE L FILTER
LOCK MAINTENANCE
CHECK ON EXIT
FI LT ER OFF RESET
SET POINT <- C OOL
% RH HE AT ->
AW AY
R E T URN NIGHT
SCHEDULE
PERIODS
– s U d e o t e s u q n e a i t y l l e s e l t c
T . O M x a e s i t t g n o n t available on SL and Kuhl+ models.
button turns the schedule function on
button a second time turns the
(UP) or
s i b t t u n o s i s u d e a e t f a r m e u n e t i
This button is used in conjunction with User
WAIT
BACK
F
A
M
P
M
C
DISPLAY
ENTER
BUTTONS
e b w t e e f n n a s e p d e . s
(DOWN) button
m h s a e b n e s l e c e e t . d
POWER
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