Maintenance - Trane CXAU Installation, Operation And Maintenance Manual

Maintenance

Routine maintenance needs to be done by qualified professionals. To keep normal operation of the unit, extend the service life
and reduce the possibility of failure, please regularly implement the following check items and adjust parameters and necessary
maintenance, and do records, which helps maintenance personnel to diagnose.
Daily Regular Checks
1. Please check regularly whether the condenser is dusty, clean the condenser if necessary. When the round-tube-plate-fin
heat exchanger is seriously dirty, it will reduce the performance of the unit.
2. Please clean the contaminated fan blades regularly.
3. Please check the vibration and sound regularly to check whether there are abnormal compressor noises and vibrations.
When an abnormal sound occurs, please check the location and cause, and contact the manufacturer or distributor if when
the cause is unclear.
4. Please check the host unit, such as whether the electric control box is loose, whether the pipeline leakages and abnormal
vibration, etc.
5. Please check whether air is mixed in the water pipe system. Even if exhaust operation is performed, air may be mixed into
the system, so please discharge the air regularly.
6. Please check and clean the water filter. Professional assistance is needed when clean the water loop.
7. Please check the water quality regularly. If the water quality is worse, replace the contaminated water in the system.
Contaminated water reduces cooling capacity and corrodes heat exchangers or water pipes.
8. For unit in cooling mode in winter, ethylene glycol antifreeze is added to the circulating water, it is necessary to regularly
check the concentration of ethylene glycol in the circulating water, and unsuitable concentrations will decrease the
antifreeze ability or lead to antifreeze failure.
9. Please regularly check the valves and pipelines on the water loop, whether the water pipe joints are tight, and check the
water pump and its related parts.
10. Please regularly check and record the pressure, temperature and other parameters to see if they are within the normal
range and record the maintenance time of spot check.
● Be sure to cut off the main power supply before making any contact, otherwise it may result in casualties and
damage to the unit.
● Maintenance and servicing work is very important and should be carried out at least every six months or 1000.
Inspection and Cleaning of the Condenser
To ensure that the condenser works effectively, the outside layer must be free of any fallen leaves, cotton threads, insects,
slag shells, flops and other contaminants. If there is dirt on the condenser, it will cause the operating pressure too high (high
pressure alarm), and the operating current will increase (overcurrent protection) to increase power consumption. Also it'll cause
low pressure too low during heating (low pressure protection), causing the unit fail and shut down.
If the condenser needs to be cleaned, the compressed air is blown parallel from the inside to the outside to the aluminum fin
heat exchanger, which is exactly the opposite direction to the normal unit operating air circulation direction. When carrying out
external cleaning, you can use a vacuum cleaner and never damage the aluminum fin heat exchanger sheet. Be careful not to
be scratched by the fins when cleaning. The condenser can also be cleaned with a brush or water column, and the condenser
should be rinsed from the inside out when cleaning with the water column. If the tubes are too dirty, contact a professional
cleaning staff.
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