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64
12 - FACTORY OPTIONS AND ACCESSORIES
- 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 con
fi
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 con
fi
rm the change made;
• To exit the parameter and the menu, press ESC until the
initial screen is displayed (ON/OFF/rdy/FXX).
Warning
: The
fl
ame monitoring equipment memorises the
number of manual resets that are performed during its lifetime.
In case of
fi
ve resets performed in a period of 15 minutes,
without a
fl
ame being ignited and detected, the equipment
will go into a “timed” lockout (F13). In this case, it is required
to wait another 15 minutes before resetting again. Press the
reset button on the equipment to immediately reset this block
condition.
Note: should the safety thermostat (STB) be open before
starting the start-up cycle (this could be caused, for example,
by low temperatures), the pilot light equipment will be kept in
“standby” and block F15 will be shown.
■
Analysis of Blocks - Faults
The CPU-SMART manages two types of blocks:
- preventive, it warns the client that the PCH heater requires
maintenance;
- operational, it stops the PCH heater for safety reasons or to
ensure its correct operation.
Some operational blocks require manual resets; others reset
themselves when the problem that caused them is solved.
Below is a complete list of faults, possible causes and possible
remedies.
■
Reset:
The modulation PCB allows the operator to identify more
than thirty di
ff
erent causes of faults. This makes it possible to
manage each event very precisely.
To reset the faults, press both arrows simultaneously for a few
seconds.
If ignition fails, the
fl
ame monitoring system reattempts ignition
four times. After four failed attempts, it will block and display
the code F10.
The faults code and cause of the faults is shown in the FAULT
table in next Paragraph.
If the
fl
ame monitoring equipment is blocked (codes from F10
to F20), it is also possible to unblock it by using the button on
the equipment itself. This block is shown by a LED that lights
up on the equipment.
- First level menu:
The following menus are present on the
fi
rst level:
machine status
gives information about the operation of the
PCH (ex. rdy, ON, etc.);
FUN
from FUN it is possible to select the function ON, OFF
or EST (do not select EST);
REG
this menu allows the user to force the burner to
the minimum or the maximum for combustion tests; it
automatically returns to the previous position at the end of
the preset time (10 minutes);
TIN
allows the user to read the value of the 0/10 Vdc signal
coming into the PCH;
Pra
not used;
ABI
used to enter the PWD to access menus of second and
third level.
Entering the password 001 will provide access to the second
level and make the Set Point and I/O menus available.
Entering the second password grants access to third level.
This password must be requested directly to CARRIER
technical service.
Fault Description
Cause
Remedy
Blocks caused by Flame - Dependent on the TER equipment
F10
Failure to ignite
fl
ame after
4 attempts performed by
the equipment
• Phase and neutral
reversed.
• Earth wire not connected.
• Phase-phase connection
without neutral.
• Start-up electrode failed
or badly positioned
• Detection electrode failed
or badly positioned
• Detection electrode that
moves or disperses to the
earthing system when hot.
• Low CO2 value
Manual reset
F11
Ill-timed
fl
ame
F12
Failure of ignition; not
visible.
The count, displayed in
the historical list, indicates
whether the heater has had
problems with ignition
F13
The TER equipment
doesn’t accept the reset
command from CPU-
SMART
TER has
fi
nished its 5 reset
attempts in the period of 15
minutes.
Wait 15 min.
or use reset
button on
equipment
F14
Lack of communication
between TER equipment
and CPU for more than 60s
TER equipment or CPU-
SMART PCB broken
Auto-reset
F15
The CPU-SMART PCB
sent the ignition signal to
the equipment. After 300
seconds, the equipment
has not yet lit the
fl
ame
Safety thermostat blocking
start up
Check
contact
closing
TER equipment broken
Manual reset
F16
Generic equipment block
TER equipment broken
Manual reset
F17
Internal malfunction of TER
equipment that does not
accept reset command
from CPU-SMART
TER equipment broken
Manual reset
of equipment
Blocks caused by temperature (safety blocks)
F20
Activation of safety
thermostat STB
• Excess air temperature
due to lack of air circulation
• Safety thermostat broken
or not connected
Manual reset
Block FAN - burner ventilator
F30
Fan speed too low in start
up phase - VAG
Burner fan broken.
FAN electrical cables
broken or not connected
Manual reset
F31
Fan speed too high in start
up phase - VAG
Manual reset
F32
Fan speed, during
operation, outside
minimum and maximum set
parameters - VAG
Manual
reset,
autoreset
after 5 min.
NTC probes broken or missing
F41
Probe NTC1 error, air
intake temperature
Absence of signal from
probe or broken probe
Auto-reset
Over-temperature
F51
The temperature of the air
intake probe NTC1>TH1
• The minimum heat power
of the PCH heater module
is over-sized compared to
the power output required
by the environment.
• Check the TH1 param. -
air intake set point.
Auto-reset
if NTC1<
TH1-15
Lack of voltage
F75
No voltage during operation
cycle (excluding stand-by);
the fault is not visible on
remote control but only
counted.
No voltage during operation Auto-reset
Internal malfunction of CPU-SMART PCB
F00
Internal malfunction of
CPU-SMART PCB
Perform a manual reset
of the PCB; replace the
CPUSMART if the problem
persists
Manual reset
Summary of Contents for 50FC 020
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