10
TROUBLESHOOTING GUIDE
Your air conditioner is very reliable and requires little maintenance. However, the air conditioner’s proper operation can be interrupt-
ed by a malfunction in the electrical system or by incorrect operation. You can try to overcome these simple malfunctions yourself, with
the aid of the following table and the malfunction displays shown in Fig. 16.
PROBLEM
POSSIBLE CAUSE
SOLUTION
Air conditioner does not work.
• No command is transmitted to air conditioner.
• Press the On/Off (Transmission) button.
• Air conditioner did not receive transmitted
command.
• Make sure that remote controller is pointed at air
conditioner during command transmission.
POWER indicator light is not lit.
• Air conditioner is not properly connected.
• Check electrical connection.
• Automatic interrupter switched Off.
• Reset interrupter.
• Fuse burned.
• Replace fuse.
FILTER indicator light is lit.
• Filters require cleaning.
• Remove and clean filters.
• For 40BN036 move operation switch to OFF
position for 5 sec. and return it to REMOTE.
• For 40BN018,024,030 press the operation push
button continuously for 5 seconds.
Air conditioner is working, but
does not perform the required
operation.
• Desired temperature setting is higher than
room air temperature when operating in the
COOLING mode.
• Lower the desired temperature setting.
• Desired temperature setting is lower than room
air temperature when operating in the HEATING
mode.
• Raise the desired temperature setting.
(ON)/(AIR COND). Indicator light is
continuously flashing.
• The control system is malfunctioning.
• For 40BN036 slide the operation switch to OFF
position for 5 sec. and return it to REMOTE.
• There is no direct line of sight between
the remote controller and the air conditioner.
• For 40BN018,024,030 press the operation push
button, continuously for 5 seconds. Press once
again to operate the air conditioner.
• The air conditioner has reached the desired
temperature and stopped the compressor oper-
ation (thermostat function).
Various indicator lights
behave differently than
shown in Fig. 13.
• Incorrect operation or malfunction.
• For 40BN018,024,030 press the operation push
button continuously for 5 seconds.
• For 40BN036 slide the operation slide switch
to OFF position for 5 sec. and return it to
REMOTE.
• Restart the air conditioner, if the problem per-
sists, call service personnel.
Air conditioner does not operate
with the remote controller.
• In 40BN036 the operation push button is in
AUTO or OFF. (For 40BN018,024,030 go to
next bullet.)
• For 40BN036 turn the operating switch to
REMOTE position.
• The remote controller batteries are weak.
• Replace the batteries.
• The remote controller is malfunctioning.
• Turn the air conditioner On and OFF using the
operation push button or slide switch.
The remote controller of another
air conditioner interferes with
your air conditioner’s operation.
• Both remote controllers are transmitting
on the same wavelength.
• Call service personnel.