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Troubleshooting Guide - Advance Split Ducted Unit
Doc. 9590-2015-03 Ver. 3 221111
Troubleshooting Guide
Advance Split Ducted Unit
Fault
Possible Causes
Remedies
The outdoor coil keeps freezing
over.
Faulty outdoor coil sensor
Check the sensor resistance.
Jammed reversing valve.
Test the reversing valve operation.
Obstruction on the outdoor unit.
Remove obstructions.
There is only one condenser fan
working.
Faulty fan motor.
Test the fan motor resistance.
Faulty capacitor.
Test the capacitor microfarad reading.
Faulty Outdoor PCB.
Test the PCB output voltage.
Compressor won’t operate at
100% capacity.
You can adjust your wall control temperature
so you have a large differential. This will operate
the system at 100% until the temperature gets
to within 4
o
C of the setpoint.
Note:
If the system operates under Anti Freeze or
Overheat Protection the system will not operate
at 100% capacity
Adjust the set point less then or greater than
4
o
C of the indoor temperature depending on
mode of operation.
Odour in the conditioned space
when the A/C is turned on.
Indoor unit has absorbed the conditioned space
smells eg. cigarette, cooking, etc.
If this happens, we recommend you have the
indoor unit washed by a technician. Consult
the installer from whom you purchased the air
conditioner.
No P-Trap installed.
Re-pipe drain with a P-Trap.
Dry P-Trap.
Contact the installer to carry out a general
service and fill the P-Trap.
02. EC Fan Troubleshooting
Fault
Sequence of Events
Possible Causes
Remedies
1. Auto Mode is not
available.
When scrolling through fan
speeds, Auto Mode is not
selectable.
During commissioning,
Self-Learn mode was not
activated.
Carry out self learn mode. Refer LR7/LC7/
NEO controller operation manual.
Self learn mode failed during
commissioning.
Ensure that the air is balanced correctly
(static may be too high). Refer to
Installation and Commissioning
Guide-Indoor.
2. Airflow hunting during
Auto and Self Learn
Mode.
Indoor fan will intermittently
“huff”.
Excessive static in ductwork.
Duct static has changed since
performing a self-learn. Ducts
deteriorate, dirty filter, change
in duct layout.
Reduce static where possible.
See installation guidelines on duct
installation.
Clean filter and re-perform self-learn.
3. Too much airflow when
minimum zones are on.
Air is blowing too much when
set to minimum zones.
Fan not set to Auto Mode.
Change fan setting to Auto Mode
Poor air balance.
Carry out air balance and install manual
dampers as required.
Minimum duct and outlet sizes
requirements not followed.
Check Installation and Commissioning
Guide-Indoor and adjust / change if
necessary.
