Carrier 50FC Installation, Operation And Maintenance Instructions page 46

12 - FACTORY OPTIONS AND ACCESSORIES
By removing the access door to the inside of the burner, the
CPU-SMART PCB can be seen :
■ Burner protection for low outdoor temperatures (optional):
With outdoor temperatures
below -14ºC WB, a protection
kit for low temperature is
available. The kit is composed
of a 55W electrical heater and
a NTC probe.
The burner control manages
the electrical heater to maintain
a constant temperature inside
the burner housing higher than
+ 1° C.
■ Interface panel:
Each PCH heater is fi tted as
standard with a multifunction
LCD panel located inside the
burner housing, which is used to
control, confi gure and diagnose
all operating parameters of the
equipment.
The instrument panel is fi tted
with a red 3 digit LCD display
and four function keys: ↑ , ↓ ,
ESC and ENTER; the display
allows the user to display the
heater operating mode and its
faults. It allows our service centre to change the main operating
parameters.
Changing parameters requires a password.
- Viewing the burner status:
The machine status is shown on the display by the following
wordings:
46
rdy: the machine is on without burner fl ame; it is waiting
for the ON control and/or the heat demand from the room
temperature monitoring system.
On: the machine is on with burner fl ame or is in the ignition
phase.
Off: the machine is turned off by the control on the LCD. Any
heat demands will be ignored. To light the burner, the LCD
must show "operation ON";
Fxx: Fault detected.
During normal operation, the display will show the writing On
if the burner is on; rdy when the heater is being switched off
or the room temperature has been reached.
Air when the EST function in the menu FUN was selected by
mistake; modify FUN to ON or OFF.
In the event of communication problems between the CPU-
SMART PCB of the burner and the LCD panel, the word CPU
will fl ash on the display if the problem is caused by the CPU;
three fl ashing dots will be displayed if the problem is caused
by the display PCB. If needs be, check that the display and
the PCB are correctly connected and that the small cable
RJ11 is securely held in the connector.
- Navegating the menu:
The menu has three levels. The fi srt is visible without entering
a password, the second and third require using second and
third level passwords.
Use the arrows to scroll the menus: ↑ (up arrow) and ↓ (down
arrow). Press ENTER to select the menu, and again to select
the parameter. Change the parameter with the arrows and
confi rm the change by pressing ENTER. To exit the parameter
or menu, press ESC. If you exit the programming function,
after about 10 minutes the program will exit the menu and
go back to the "machine status" view.
To change the parameter, press the arrow keys: pressing ↑
(up arrow) increases the parameter by 1, pressing ↓ (down
arrow) reduces it by 1. Pressing both arrow keys for at least
three seconds increases the parameter scroll speed.
To confi rm a change in parameters, press ENTER for at least
3 seconds. The change in the parameter is signalled by a
fl ash of the display.
All submenus scroll from the bottom towards the top, and they
start over when the end of the menu is reached.
- Entering the password:
• From the initial screen (ON/OFF/rdy/FXX) use the ↑ (arrow
up) and ↓ (arrow down) keys to reach the ABI function; hold
down the ENTER key for 3 seconds;
• Set the password inside the menu ABI and confi rm it with
ENTER; hold it down per approximately 3 seconds (the
fl ashing display will show that the parameter has been
stored);
• Press ESC and, by using the ↑ and ↓ arrow keys, return
to the initial screen (ON/OFF/rdy/FXX); press ENTER for
3 seconds;
• Use the ↑ and ↓ arrow keys to reach the desired menu item
(Flt, I/O, SET, PAR);
• Press ENTER to access the function;
• Use the ↑ and ↓ arrow keys to select the parameters to be
displayed and edited;
• Press ENTER to display the parameter value;
• Use the ↑ and ↓ arrow keys to edit the value (only SET
and PAR);
• Press ENTER to confi rm the change made;
• To exit the parameter and the menu, press ESC until the
initial screen is displayed (ON/OFF/rdy/FXX).