The MAC 500 is a mobile air conditioner based on the established ‘’split system’’ air conditioning unit. The machine is supplied in 2 sections, the Cooling Console (room unit) plus a Dry Cooler (outdoor section) with attached flexible lines.
MAC 500 Unit
Reservoir cap
Empty condensate tank button
Prime water circuit button
Discharge air grille
Return air grille (air filter behind)
Cooling console
Compressor securing handwheel positioned centrally on the underside of the base
Lifting handle
Control panel
Reservoir fill point
Reservoir cover
Locating the MAC 500
The MAC 500 indoor unit should be positioned in the room that requires air conditioning. It should be sited so that the air can circulate freely with no obstructions around the discharge air grille and/or the return grille. It must be positioned in an area where it is accessible to place the condensing unit outside taking into consideration the length of the flexible lines. When connecting or disconnecting the lines there may be a small amount of water spillage. To prevent this from happening, use either a cloth or a small container under the connections to catch the excess water.
The outdoor unit must be connected to the indoor unit using the flexible lines provided. The unit must be positioned outside of the air conditioned room, and requires a free supply of air. Do not obstruct the air flow over its heat exchanger, and do not locate the unit in a confined space or area where the heat produced will cause the temperature to rise above 35°C. Usually the outdoor unit is better located outside the building.
Do not locate the outdoor unit more than 5 metres above the indoor unit. The outdoor unit can be stood on any level, firm service.
While the unit is cooling, it will produce condensate (water) in the indoor unit. This will automatically be pumped through the flexible lines and water is discharged from the outdoor unit. The outdoor unit should be positioned so that the water can drain away or evaporate without causing any problems.
Operating the MAC 500
Air Conditioner off
Cooling with low speed fan
Cooling with medium speed fan
Cooling with high speed fan
Low fan speed only
Turn the thermostat clockwise for a lower temperature setting
Turn the On/Off rotary switch to ON and select the desired fan speed
The unit’s compressor will start after a short delay, provided that the unit’s adjustable thermostat is signalling cooling. The cooling light will illuminate
Adjust the control thermostat by small movements until the required setting is obtained
Adjust the direction of the air discharge to suit the installation. The discharge air grille can be lifted from its spring clips. This gives access to the adjustable air deflectors behind the grille. These deflectors are set to direct the air sideways as required. The discharge grille should be fitted with the air throw upwards from the unit. This will give the best air distribution and avoid the chance of air short circuiting between the discharge and return grilles. The grille can be reserved so as to provide for front air discharge when the site conditions demand
Maintenance
Filter cleaning – Behind the return air grille in the indoor unit, there is a cleanable air filter. The grille must be removed, (pull away from the spring clips) and the air filter lifted out for cleaning. The filter can be washed in soapy water or vacuumed. The cleaning interval is determined by the area’s conditions. It is recommended to check the filter once a week
Check the cooling water – The MAC 500 should not lose any cooling water during normal use. Some water may be lost when making or disconnecting the flexible lines. It is recommended to check the water level in the reservoir once a week
Moving the MAC 500
Switch the unit off at the rotary switch
With the unit still connected to the electric supply, lift the reservoir cover and press the button marked ‘’push to empty’’. This will activate the condensate pump. Hold the button down until all the condensate water in the machine has been removed. The sound the pump makes becomes louder. Do not continue to operate the pump once all the water has been removed. This will avoid the risk of water spillage while moving the unit
Trouble Shooting
FAULT
SYMPTOMS
REMEDY
Unit does not run
No operation. Power button is illuminated
Check the water supply
Check / replace 13 amp plug fuse
If fault recurs, check capacity of power supply. Verify the correct voltage at the units plug. Avoid extension cables is possible
Power button illuminated. Cooling fault also illuminated
Check the water level in the reservoir. If the unit is leaking water, then contact London Cool on 0800 440 444
Check all the water and power connections in the flexible lines including any extension leads used
Ensure the unit is correctly positioned with an unobstructed air flow
Check / clean the air filter
Reset the high pressure cut out by pushing the red button in the service panel
Power button illuminated. Drain fault also illuminated
Check the condensate pump operation by lifting the lid and pressing the push to empty button. The pump should run and empty the water. This will reset the fault button to off
Check the condensate pump overheat switch, which is located on the rear lower left hand side of the cooling console. Press the reset button
Check to ensure the condensate line is not blocked or kinked
Power button is illuminated, and the cooling light does not illuminate
Check the rotary switch is on cooling mode
Check the thermostat is correctly adjusted
Check the surrounding air temperature is warm enough for the unit to operate on cooling
Unit cooling output reduces
Air flow from the console reduces and the cooling coil ices up
Check for any airflow obstructions to the unit
Check / clean the air filter
Unit leaks water. (Indoor)
Unit operates correctly but water leaks from it
Check the unit is positioned on a level surface
Check the condensate drain line is properly connected/unobstructed
Check the water connections are properly made
If necessary, isolate the unit and check for water leaks inside the unit
London Cool air conditioner rental and sales
This document has been compiled in good faith, but no representation is made or warranty given (either express or implied) as to the completeness or accuracy of this information
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