Daikin UAL-A Series, Engineering Data

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Maintenance
Repair
■ The unit can only be repaired and serviced by specially-trained technicians. After a unit is serviced, safety
controls must be checked and analyzed before the unit is turned on.
Items to be Checked Periodically
■ Clean the fin heat exchanger periodically.
To optimize heat exchange efficiency of the condenser, check that the external part of the condenser is clean
without leaves, cotton fibers, insects or other impurities which might clog up fins of the condenser. Use water or
water vapor while cleaning to clean it.
■ Check the status of the chilled water from time to time.
Discharge water by loosening the air or water discharge plug.
If the water quality degrades, replace water in the system timely.
Contaminated water can degrade the cooling capacity and corrode the heat exchanger and water pipes.
■ Check whether free air exists in the water pipe system.
Free air may get into the system even during the air discharging process. Discharge air from time to time.
■ Clean the Y-shaped water filter in the water system periodically.
■ Replenishing refrigerant and lubricant.
Each unit is filled with enough refrigerant and lubricant before delivery.
If the system operates smoothly, customers neither need nor are allowed to replenish or change the refrigerant
or lubricant.
If replenishment is necessary due to leakage, please refill the quantity specified in the nameplate of the unit.
Note: Before checking and maintaining the unit, confirm the
safety precautions again.
Note: Before delivery, strict factory test is conducted to ensure
the unit works at optimal performance. The unit must be
maintained from time to time.