29
CONDITION
The system does not
start.
Check that 5 minutes has passed from turn on time, as
•
the system has inbuilt safety timers.
Check thermostat settings are correct.
•
Check the thermostat “set-point” is set low enough for
•
cooling or high enough for heating.
Air does not fl ow.
(Indoor Unit)
Check Zones are switched on. (where fi tted)
•
During heating operation, air does not fl ow out for
•
approx. 15 seconds after start up, this prevents cold
drafts.
During the defrost of the outdoor unit in heating
•
operation, the indoor fan will not operate for several
minutes, this is to prevent cold air being blown into
rooms.
Cooling/Heating is not
suffi cient.
The cooling/heating function may not work effectively
•
when the “return air fi lter” is clogged with dust and dirt.
Make sure the air inlet and air outlet on the outdoor unit
•
are not blocked.
The outside temperature is above or below the design
•
conditions.
Steam from outdoor unit.
It is caused by the defrosting of the outdoor unit in
•
heating operation in cold conditions.
Water from outdoor unit.
This is normal during heating operation, it is due to
•
water forming on the heat exchanger.
Occurring of noises
When heating or cooling is started or stopped, a
•
swishing or gurgling noise may be heard. This noise is
generated by the refrigerant fl owing between the
outdoor and indoor units.
A whooshing noise may be heard from the outdoor unit
•
during operation. This noise is generated when the
refrigerant changes direction in the defrost operation.
On start up, the outdoor unit may be louder than normal
•
for a few seconds whilst the compressor reaches the
designated speed and operating pressure.
During defrost operation the compressor may generate
•
more noise than normal.
Fault Codes
When EXX is displayed on the wall controller, take note
•
of the digits after E and contact your installer.
Before contacting your installer, please have your air conditioners
Model No. and Serial No. with you. (See page 2)
CAUSES OR CHECK POINTS
TROUBLE SHOOTING
