21 Changi South Street 1 Singapore 486777 Phone: +65 65420833 Fax: +65 65426920
E-mail: ductless@escoglobal.com Website:
www.escoglobal.com/ductless
SERVICE SECTION
CHAPTER 3 - TROUBLESHOOTING
Problem
Possible
causes
Corrective Action
Filter loaded
Plug in the multimeter to the Motor Voltage Sampling Port. Turn the Speed Control to
increase the blower voltage by approximately 10 VAC until the alarm is turned off and
the LCD shows nominal airflow reading. The sensor will take about 2-3 minutes
before it can register a new airflow setting.
Note: The cabinet must be certified at least annually.
If the blower is already operating at maximum voltage and the airflow alarm is still
triggered, it’s time to change the filter.
Faulty/
inaccurate
calibration
Re-calibrate the microprocessor.
Warning:
To be carried out only by an authorized person.
3.1.2 SOFTWARE TROUBLESHOOTING
Note: This section applies only for SPD
Error Code Explanation Corrective Action
ERR.AIRFAIL
Airflow Error:
This error occurs if the
FAN button is pressed
at a time when airflow
has dropped below fail
point.
Switch on FAN again
and wait for it to be
stable before
troubleshooting
Check the inflow velocity using anemometer:
If the inflow has indeed dropped below the fail point (see Calibration section for
the exact value), adjust the speed control to achieve blower output voltage as
stated in the Calibration certificate. WARNING: This step should be carried out
only by an authorized person.
If the inflow still above the fail point, press menu and switch to MAINTENANCE
mode.
Press SET button to read diagnostic message.
Check whether the Constant and Temperature values are correct. If Constant
value is not correct, please change it to factory setting. If temperature value is
incorrect, please check the wire connection and temperature sensor. Call your
distributor to replace spoilt parts (if any).
Check the wire connection and air-flow sensor. Call your distributor to replace
spoilt parts (if any)
WARNING: This step should be carried out only by an authorized person.
ERR.CALIB
Controller has not yet
been calibrated
Calibrate the controller. Refer to Calibration section for details.
WARNING: This step should be carried out only by an authorized person
3.1.3 SPB-2AX
Problem
Possible
causes
Corrective Action
Power failure
Check if there is power at the power socket. If circuit breaker has tripped, please
check electrical components and connections before resetting the breaker.
Breaker is located on top of the unit.
Cabinet does
not start
Wrong electrical
connection
Check whether electrical cord has been connected properly to the building socket
and to the cabinet.
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