Trouble Shooting - Carrier Harmony 53VMC18A-H Service And Maintenance Manual

15. TROUBLE SHOOTING

TROUBLE
After batteries have been placed
into the remote control, the
display is not lit.
When pressing the recessed
clock adjustment button, hour
figures on display do not flash.
When pressing any button, all
symbols appear on display.
When pressing start button, unit
does not acknowledge signal
with a beep.
OR
When pressing stop button, unit
does not acknowledge signal
with a beep.
OR
When pressing any function
button, the remote control
shows the function requested
on the display, but unit does not
acknowledge signal receipt with
a beep and does not carry out
the function.
Air conditioner will not start.
REASON
Batteries are exhausted or have
the wrong polarity.
Recessed button has not been
pressed correctly.
Recessed button for time
setting is blocked due to
excessive pressure during use.
Remote control has been
irreversibly damaged.
Main switch is OFF.
Remote control batteries are
exhausted.
Remote control has not been
pointed correctly to the receiver
of indoor unit.
There are obstacles (curtains,
walls, etc.) between the remote
control and the indoor unit
Receiver on the indoor unit or
the remote control is under
intense sun radiation.
Signal transmission is
obstructed by severe
interference from an
electromagnetic field.
Main supply switch is OFF
Fuses or main switch are blown Replace fuses
Protection against frequent
compressor cycling is ON
Selected temperature is higher
than the room temperature in
the cooling mode (or lower in
the heating mode).
18
ACTION
Replace batteries or check
polarity.
Press with a round point, avoid
exerting strong pressure
Check and repair.
Replace with a new one.
Switch it to ON position.
Replace batteries.
Turn remote control OFF and
repeat the operation in the
correct direction.
Repeat the operation after
having removed the obstacles.
Avoid direct sun on the unit,
shut curtains or shades.
Avoid sending signals when
computers or household
appliances (Food processors,
coffee makers, etc.) are
operating close by cellular or
cordless telephones may also
interfere with the control.
Switch to ON
Wait for 3 minutes.
Correct selected temperature.