Carrier 50FF/FC 020-093 Installation, Operation And Maintenance Instructions page 59

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 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).
- 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.
■ Reset:
The modulation PCB allows the operator to identify more
than thirty diff 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.
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.
Fault Description
Blocks caused by Flame - Dependent on the TER equipment
Failure to ignite fl ame after
F10 4 attempts performed by
the equipment
F11 Ill-timed fl ame
Failure of ignition; not
visible.
The count, displayed in
F12
the historical list, indicates
whether the heater has had
problems with ignition
The TER equipment
doesn't accept the reset
F13
command from CPU-
SMART
Lack of communication
F14 between TER equipment
and CPU for more than 60s
The CPU-SMART PCB
sent the ignition signal to
F15 the equipment. After 300
seconds, the equipment
has not yet lit the fl ame
F16 Generic equipment block
Internal malfunction of TER
equipment that does not
F17
accept reset command
from CPU-SMART
Blocks caused by temperature (safety blocks)
Activation of safety
F20
thermostat STB
Block FAN - burner ventilator
Fan speed too low in start
F30
up phase - VAG
Fan speed too high in start
F31
up phase - VAG
Fan speed, during
operation, outside
F32
minimum and maximum set
parameters - VAG
NTC probes broken or missing
Probe NTC1 error, air
F41
intake temperature
Over-temperature
The temperature of the air
F51
intake probe NTC1>TH1
Lack of voltage
No voltage during operation
cycle (excluding stand-by);
F75 the fault is not visible on
remote control but only
counted.
Internal malfunction of CPU-SMART PCB
Internal malfunction of
F00
CPU-SMART PCB
Cause Remedy
• Phase and neutral
reversed.
• Earth wire not connected.
• Phase-phase connection
without neutral.
• Start-up electrode failed
or badly positioned Manual reset
• Detection electrode failed
or badly positioned
• Detection electrode that
moves or disperses to the
earthing system when hot.
• Low CO2 value
Wait 15 min.
TER has fi nished its 5 reset
or use reset
attempts in the period of 15
button on
minutes.
equipment
TER equipment or CPU-
Auto-reset
SMART PCB broken
Check
Safety thermostat blocking
contact
start up
closing
TER equipment broken Manual reset
TER equipment broken Manual reset
Manual reset
TER equipment broken
of equipment
• Excess air temperature
due to lack of air circulation
Manual reset
• Safety thermostat broken
or not connected
Manual reset
Burner fan broken. Manual reset
FAN electrical cables
broken or not connected Manual
reset,
autoreset
after 5 min.
Absence of signal from
Auto-reset
probe or broken probe
• The minimum heat power
of the PCH heater module
is over-sized compared to Auto-reset
the power output required if NTC1<
by the environment. TH1-15
• Check the TH1 param. -
air intake set point.
No voltage during operation Auto-reset
Perform a manual reset
of the PCB; replace the
Manual reset
CPUSMART if the problem
persists
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