Maintenance And Service; Alarm Code; Troubleshooting Chart; Final Recommendations - Carrier 40SMC***N Installation, Operation And Maintenance Manual

40SMC---N

Maintenance and service

ATTENTION:
Before performing any service or maintenance operations,
turn OFF the main power switch.
In order to obtain maximum performance, special attention should
be paid to the following points:
• Inspect and clean the outdoor unit, especially the heat
exchanger coil.
• Ensure that all rubber and insulating joints are in good
condition.
• Check and clean condenser drain pan of the indoor unit; the
same check must be made for the heat pump outdoor units.
• Check tightness of electric connections.
• Clean or replace the air filter of the indoor unit.
Alarm code, troubleshooting chart and final raccomendation

Alarm code

A diagnostic system is contained in the electronic card to "check"
the system integrity.
When the diagnostic system is under alarm, the red LED installed
onto the main card flashes as indicated below:
• 0.5 sec. ON and 0.5 sec. OFF.
• The number of flashes depends on the error that has been detected.
Not all of the errors can be reset (see table below).
Error
Error
code
2 Condensation discharging pump
3 Air temperature sensor
4 Internal battery temp. sensor
5 External battery temp. sensor
6** Dirty filters
7 Outdoor unit error
8 Low voltage
9 Compressor malfunction
10 EEPROM
11 Serial number
12 Address/zone number
13 Gas flow distributor (GFD)
* NO: Turn off power supply to the system, check and repair, if necessary.
Turn on power.
YES: Check
** If this diagnostic system is enabled.
*** YES, for the first 4 errors.
A series of possible faults is related below, as well as the probable
causes and suggested solutions.
However, in the event of a unit malfunction, it is advisable to
disconnect the power supply and ascertain the cause.
ATTENTION:
Most operations must be carried out by skilled personnel.

Troubleshooting chart

Symptoms / Cause /
REMEDY
Unit does not start
• No power supply: .
CHECK
• Main switch open:
CLOSE SWITCH
• Current wires cut:
RIPARARE O SOSTITUIRE CEPAIR OR REPLACE
( ).
BY SKILLED PERSONNEL
• Fuses blown:
REPLACE AND CHECK CONSUMPTIONS
Resettable
NO
YES
YES
YES
YES
YES
YES
***
YES
YES
YES
YES
.
.
• Protector tripped:
• Thermostat wrongly adjusted:
Unit provides less cooling or heating than normal
• Dirty air filter:
CLEAN FILTER
• Wrongly adjusted or faulty thermostat:
SELECT A MORE SUITABLE TEMPERATURE
Unit operates continuously, or stops and starts very frequently
(by skilled personnel).
• Refrigerant loss:
• Faulty compressor (Outdoor unit):
• Faulty compressor contactor (Outdoor unit):
*
Unusual noises or strange vibrations (by skilled personnel).
• Fan motor fixtures loose:
• Badly adjusted panels:
• Unit wrongly installed:
• A foreign object, tool, etc, has got into the fan:
OBJECT
Fan and motor not operate (by skilled personnel).
• Faulty motor or capacitor:
• Loose connections:

Final recommendations

All units undergo strict Quality Control testing before leaving the
factory.
Whatsmore, all the elements included, such as the control
system, electrical equipment, etc., are qualified by our Quality
Control Department, and laboratory tested in the harshest
possible conditions.
Nevertheless, after leaving the factory, it is possible that these
elements may be demaged due to causes beyond our control. In
an event, and if the unit fails to operate correctly: the user should
not manipulate any of the internal elements. In the event that
inspection and repair work is required, it should be left to a
specialized technician.
All recommendations concerning unit installation are intended to
be orientative.
The installing firm should do the job according to the
characteristics of the project, and in all events comply with the
official rulling for air conditioning and refrigeration installations.
IMPORTANT:
The manufacturer declines all responsability for malfunction
resulting from abuse.
.
RESET AS DESCRIBED
SELECT A MORE SUITABLE TEMPERATURE
.
,
OR REPLACE THERMOSTAT
CHECK AND ADD THE NECESSARY QUANTITY
REPLACE COMPRESSOR
CHANGE CONTACTOR
TIGHTEN FIXTUR
ADJUST PROPERLY
CHECK INSTALLATION
REMOVE THE FOREIGN
.
REPLACE
CHECK AND TIGHTEN PROPERLY
E N G L I S H
Air filter
.
.
( - ).
410
R A
.
.
GB - 11