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Normally, the R410A cylinder or can is equipped with a dip-pipe for liquid withdrawal. However, if the dip-pipe
is not available, invert the cylinder or can so as to withdraw liquid from the valve at the bottom.
n
R410A must be charged as liquid. Usually R410A cylinder is equipped with a dip-pipe for liquid withdrawal. If there is no
dip-pipe, the cylinder should be inverted so as to withdraw liquid R410A from the valve.
n
Do not top-up when servicing leak, as this will reduce the unit performance. Vacuum the unit thoroughly and then charge the
unit with fresh R410A according to the amount recommended in the specification.
For any enquiries on spare part please contact your authorized dealer. If any malfunction of the air-conditioner
unit is noted, check the following fault conditions and causes for some simple troubleshooting tips.
Problem
Unit does not run.
Compressor does not
operate in 3 min after
unit has started.
Air flow is low.
Compressor operate
continuously.
No cool air delivered
during cooling cycle,
or no hot air delivered
during heating cycle.
On heating cycle, no air
delivered (UATYQ250).
Or, the delivered air
is not warm enough
(UATYQ350/450/550/
600/700/900).
If the fault persists, please call your authorized local dealer/serviceman.
28
CAUTION
TROUBLESHOOTING
Causes
l
Power failure.
l
Fuse blown or circuit breaker
tripped.
l
Power supply wiring phase incorrect.
l
Protection against frequent starting.
l
Filter is filled with dust and dirt.
l
There are some obstacles at the air
inlet or outlet of the units.
l
Dirty air filter.
l
Temperature setting is too low (for
cooling).
l
Temperature setting is too high (for
heating).
l
Temperature setting is too high (for
cooling).
l
Temperature setting is too low (for
heating).
l
Unit is in defrosting cycle.
Action
l
Press the [ON/OFF] after
power restore.
l
Replace fuse or reset
circuit breaker.
l
Modify the wiring phase.
l
Wait for 3 min for the
compressor to start.
l
Clean the filter.
l
Remove obstacles.
l
Clean the air filter.
l
Reset the temperature.
l
Set the temperature
lower.
l
Set the temperature
higher.
l
Wait for a while.
(It will be resumed after
defrosting.)
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