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A/C INDICATOR LIGHT:

 Illuminates when the compressor is on and stays solid while the compressor is running. When 

the room temperature reaches the set temperature, the compressor turns off and the light blinks indicating that the unit 

has cooled the room to the set temperature 

DEHUMIDIFIER INDICATOR LIGHT:

 Press the ‘’FUNCTION’’ button to select the dehumidification mode. When the 

dehumidification mode is on, the temperature buttons and the fan speed buttons do not function and the fan will operate 
on low speed. The dehumidifier indicator light will illuminate and stay solid while the unit is dehumidifying. When the 

humidity in the room is 50% or lower, the compressor will not run, the unit will not dehumidify and the dehumidifier 
light will blink. Remember, the exhaust hose does not need to be used in dehumidifier mode 

NOTE:

 This unit has a three-minute compressor delay protection circuit. Thus, the compressor may take up to three minutes to 

start from either being switched on or when changing between the dehumidification and air conditioning functions.

If there is a power interruption while the unit is operating, the unit will not turn back on automatically when the 

power is restored. The unit must be turned back on manually. The unit is designed with this safety feature to 
protect the compressor.

 

Cleaning this mobile airconditioner unit

 

Before cleaning the unit, turn it off and unplug it from the outlet. For safety reasons, never wash the conditioner

 

Exterior Surfaces of the Unit

 

Clean the air conditioner by using a damp sponge, and dry it with a clean, soft cloth 

Never use alcohol or any product containing solvents 

Air Filters

 

The air filters located on the back of the unit collect dust contained in the air. The air conditioning unit must ALWAYS be used 

with the air filters

 

The build up of dust reduces the efficiency of the air conditioner. Therefore, the air filters must be cleaned every two 
weeks, and more often if the machine operates in a dusty atmosphere 

If the filters are obstructed the air conditioner will be less efficient 

Each air filter has a tab in the centre and is secured to the unit by two clips on the top and two clips on the bottom of 
the filter. Remove the air filters with the unit switched off, by pulling the tab towards you 

Clean the air filters with a vacuum cleaner. If the filters are very dirty you can wash them in warm water (never use hot 
soapy water). Make sure that the air filters are completely dry before putting them back into the unit 

Do not bend the filters 

Trouble Shooting

 

If your mobile room air conditioner does not work, it is sometimes a minor problem. Before calling London Cool, please check the 
following points to see if they solve the problem.

PROBLEM

PROBABLE CAUSE

SOLUTION

The air conditioner / dehumidifier 

doesn’t work

The plug is not properly inserted into the 

wall socket

Plug the unit in properly

There is insufficient amount of amperage 
to start the unit

Check the circuit board for 13 amp fuse 
availability

The water tank is full / alarm light is 

illuminated

Check drain (A) for an obstruction  and/or 

empty drain (B)

The air conditioner cut off

The exhaust hose is too long, run 
incorrectly or kinked

Exhaust hose can only be extended using 
max 5’ of 4’’ PVC pipe for a total exhaust 

length of 10’

The unit is positioned to close to a wall or 
an object

The unit should be at least 1½ away from 
any wall or object

The flap vent obstructs the wall exhaust

Use the screen instead of the flap vent for 

wall exhaust

The ceiling or the basement does not 
have ample ventilation

The unit will overheat the exhaust pipe 
and cannot fully vent

The ‘’timer off’’ function has been 

activated

Push the power button to turn the unit 

back on

The air conditioner / dehumidifier 

LED indicator light blinks

In the a/c function, the ambient 
temperature has reached the set 

This is normal. Set the temperature lower 

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