Periodic Checks - Daikin UATYA-BBY1 Installation, Use And Maintenance Manual

7.4 Periodic checks

Carry out periodic checks to make sure the unit is working correctly:
OPERATION
Check the operation of all the control and safety equipment as described previously.
Check the tightness of the electrical terminals in the electrical control panel and in the terminal
boards of the compressors. The moving and fixed contacts of the contactors must be cleaned
periodically and should be replaced whenever they show signs of deterioration.
Check the refrigerant charge through the liquid sight glass.
Make sure there are no oil leaks from the compressor.
Make sure there are no water or water/glycol mixture leaks in the hydraulic circuit.
If the unit is to remain out of service for a long time, drain the water from the pipes and the
heat exchanger. This operation is necessary if ambient temperatures lower than the freezing
point of the fluid used are expected during the time it is to remain stopped.
Check the filling of the water circuit.
Check that the differential water pressure switch, or the flow switch (where present), is working
correctly.
Check the crankcase heaters of the compressors.
Clean the finned coil by following the instructions in the "External cleaning" section according
to the type of coil installed
Clean the air filters
Clean the ventilation filters of the electrical control panel.
Carry out the defrosting test.
Check the moisture indicator on the liquid sight glass (green = dry, yellow = wet). If the
indicator is not green, as indicated on the sight glass sticker, replace the filter.
Check the condition, fixing and balance of the fans.
Check that the noise emitted by the unit is normal.
Test performed to check correct operation of the refrigerant leak detection sensor and its safety
chain connected downline
Check that the cable glands in the box of the electrical control panel are tightened.
This planning refers to an average installation; there could be installations in which it may be
necessary to increase the frequency of some checks.
Current legislation may require considerably longer intervals on periodic checks than the
recommended ones, also in reference to the safety devices installed and to the refrigerant charge
present, without causing the warranty on the unit to be voided.
Translation from original instructions
Packaged Rooftop
52
RECOMMENDED
FREQUENCY
Monthly
Monthly
Monthly
Monthly
Monthly
Seasonal
Monthly
Monthly
Monthly
3 months
Monthly
Monthly
Monthly
4 months
4 months
4 months
Yearly
Yearly
We reserve the right to make changes without any prior notice.
4P645202-1
UATYA