48
12 - FACTORY OPTIONS AND ACCESSORIES
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 Series
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