Periodic Checks - Daikin UATYA-BFC2Y1 Instructions For Installation, Use And Maintenance Manual

8.4 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.
If the unit is to remain out of service for a long time, the valves on the delivery and intake lines
of the compressor must be closed.
Check the filling of the water circuit.
Check that the differential water pressure switch, or the flow switch (where present), is working
correctly.
Clean the metal filters in the hydraulic pipes.
If the unit also has metal filters, clean them with compressed air blown in the opposite direction
to that of the air flow during operation. Use a jet of water if they are completely clogged
Clean the air filters
Carry out the defrosting test (only for heat pump units).
Check for foam in the evaporator sight glass.
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.
In units with belt and pulley driven fans, check the drive belts for wear and correct tension.
To check the tension of the belts, press down perpendicularly on the belt at the central point
with a force of about 5 kg. The central point of the belt should move by 10 to 12 mm; as
regards wear, replace the belts if they are cracked, frayed or scuffed or have any other obvious
damage.
Calibration of the refrigerant leak detector sensor
Check that the cable glands in the unit are correctly tightened.
Replacement of cartridge in refrigerant leak detector
Replacement of the refrigerant leak detector sensor
Check that the differential air pressure switch is in good working order.
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.
We reserve the right to make changes without any prior notice.
UATYA
4P645202-2
RECOMMENDED
FREQUENCY
Monthly
Monthly
Monthly
Monthly
Monthly
Seasonal
Seasonal
Monthly
Monthly
Monthly
Monthly
Monthly
Monthly
Monthly
4 months
4 months
4 months
Yearly
Yearly
400 days
10 years
Yearly
Translation from original instructions
Packaged Rooftop
77