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Design & installation Guide For McQuay MDS Multi System
Thoroughly check and clean the indoor and outdoor units;
Clean or replace the air filter;
Clean the drain pipe;
Clean the coil of the outdoor unit indoors;
Check the fan for dynamic balance before running;
Secure all electric connections;
Check if the refrigerant leaks.
Maintenance and care of outdoor units
Normally, for an air-cooled duct unit produced by MacQuay, you only need to check and clean the
heat exchanger on a quarterly basis. However, if the unit is operating in an oily, salty, wet or dirty
environment over a long period of time, ask professional air-conditioning service personnel to
service the unit so that the unit can operate and function well. Otherwise, the service life of the
unit might be shortened.
Care of the compressor
If the unit gets restarted after staying idle for a long time, do not restart the compressor until
you keep the compressor, crankcase and heat exchanger of the outdoor unit powered for at
least 24 hours.
Care of the heat exchanger
Maintain the heat exchanger once around the end of the running season. If a blade of the heat
exchange falls sideways, be sure to put it upright. If any dust or foreign matter is present on
the surface of the heat exchanger, use a clean together with a nylon brush to clean it. If
[Note]: Maintenance and care before the first operation in each season when the air-conditioning unit is put into
operation
Part Procedure Recommended interval
1. Open the air input grid and take out the air filter and air refresher;
2. Disassemble the air filter and the air refresher;
3. Clear the dust away from the air filter using a cleaner or water
below 40 containing neutral detergent. Never wash the air
refresher;
4. Until the air refresher and the air filter, put them back in the air
input grid. At least once a month Caution: Never use gas,
dehydrating agent, benzene or any other chemical.
Wipe the dirt and dust off the grid and panel with a piece of soft cloth
soaked in warm water, cold water or neutral washing powder. Caution:
Never use gas, dehydrating agent, benzene or any other volatile
chemical, to avoid deforming the plastic surface.
1. Check them to see if they are clean. Wash them if necessary.
2. Check for the flow of condensate water.
1. Check and clear the dirt between the blades;
2. Check and clear any foreign matter that blocks the air flow inside
the indoor unit and the outdoor unit.
1. Check the operating current and voltage of the indoor unit and
outdoor unit;
2. Check if the electric lines are securely connected.
The lubricating oil is filled by the manufacturer. If the refrigerant
circulating pipe is properly airtight, there is no need to refill the pipe.
Check it to see if there is any unusual noise.
No need for care
No need for care
Once every six months
All the motors are properly lubricated and sealed before they leave
factory.
Check the weld junctions and joints of the refrigerant pipes to see if
they are airtight.
At least once a month
At least once a month
Once every three months
When necessary
Once a month
Once every two months;
Once a year
Air filter (indoor unit)
Indoor unit
Condensate water
collector and pipe
Indoor fan
Fan motor lube
Compressor lube
Compressor
Power supply
Indoor fan, coil pipe
of outdoor unit
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