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
External air
interference
Ensure that there are no external sources of airflow disturbance like air
conditioner vent, window or incidences of door opening or people walking fast
near the cabinet.
Motor failure
Check the motor. If motor is not running, refer to ‘motor silent’ section.
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 airflow
is at nominal point.
Note: The cabinet must be certified at least annually.
If the blower is already operating at maximum voltage and the airflow is still lower
than nominal point, it’s time to change the filter.
Excessive fan
noise
Loose motor or
impeller wheel
mounting
Refer to above Motor is Silent/Faulty Capacitor, to check the capacitor, and
replace if necessary. Check if the blower mounting bolts have been fully
tightened.
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