Delta 80SF040J24, Instruction Manual, Page: 21 / 24

18
9 Troubleshooting
If your conditioning unit runs abnormally, please check the following items before contact the
maintenance serviceman.
Error Possible Causes
The unit could not be started.
①
The unit is energized.
②
The circuit breaker trips due to the electric leakage.
③
The circuit voltage is too low.
The unit could run but would
stop before long.
The air inlet/outlet of the indoor/outdoor unit is blocked.
The cooling effect is good.
①
The air filter screen is dirty or is clogged.
②
There are too many heat sources or people in the room
③
The door or window is open
④
There is an obstacle at the air inlet/outlet.
⑤
The set temperature is too high.
The heating effect is not good.
①
The air filter screen is dirty or is clogged.
②
The door or window is not closed fully.
③
The set temperature is too low.
The remote controller is
useless.
①
If the remote controller crashes even if the batteries have
been replaced, please open the back cover of it and press
the button “ACL” to let it back to the normal condition.
②
Is the remoter controller in the signal receiving range? Or is
it blocked by obstacles?
③
For the duct type unit, operate the remote controller
pointing at the wired controller.
④
Check if the voltage of the batteries of the wired controller
is enough; or change them.
NOTE !
If the air conditioner still runs abnormally after the above check and handling, please contact
the maintenance serviceman at the local appointed service center.