Daikin Packaged Rooftop System DPS007AHHG4PW-3

Warning: This service requires trained personnel with PPE!

Phase voltage monitor functional?

If phase voltage monitor is not functional, report the issues to the maintenance team and stop the procedure

Are the readings matching the factory defaults?

Issues found during the service

CAUTION: Severe loss of charge may occur if the high refrigerant pressure switch is replaced before reclaiming the refrigerant. Replace pressure switch after reclaiming refrigerant

Refrigerant Sensors or Switches serviced

DANGER: Hazardous voltage. May cause severe injury or death. Disconnect electric power before servicing equipment. More than one disconnect may be required to de-energize the unit

Measure continuity through all fuses

All electrical connections are tight

Check the resistance to ground for each circuit

The supply, condenser and exhaust fan motors are permanently lubricated and require no periodic lubrication.

Each unit as shipped is trim balanced to operate smoothly. To provide satisfactory operation after shipping and installation, use accepted industry guidelines for field balancing fans.

NOTE: Excessive vibration from any cause contributes to premature fan and motor bearing failure. Monitor overall vibration levels every six months of operation. An increase in levels is an indication of potential trouble.

Enter the vibration level of the fan

Did the fan pass the vibration test?

Enter any issues found during the vibration test

Sign off on the fan maintenance

WARNING: Prior to cleaning the unit, turn off and lock out the main power switch to the unit and open all access panels

The following cleaning procedures are recommended as part of the routine maintenance activities for Option E Coated Coils. Documented routine cleaning of Option E Coated Coils is required to maintain warranty coverage.

Remove Surface Loaded Fibers: Surface loaded fibers or dirt should be removed prior to water rinse to prevent further restriction of airflow.

Is it possible to back wash the side of the coil opposite that of the coils entering air side?

If unable to back wash the side of the coil opposite that of the coils entering air side, then surface loaded fibers or dirt should be removed with a vacuum cleaner. If a vacuum cleaner is not available, a soft non-metallic bristle brush may be used. In either case, the tool should be applied in the direction of the fins. Coil surfaces can be easily damaged (fin edges bent over) if the tool is applied across the fins.

NOTE: Use of a water stream, such as a garden hose, against a surface loaded coil will drive the fibers and dirt into the coil. This will make cleaning efforts more difficult. Surface loaded fibers must be completely removed prior to using low velocity clean water rinse.

Periodic Clean Water Rinse: A monthly clean water rinse is recommended for coils that are applied in coastal or industrial environments to help to remove chlorides, dirt and debris. An elevated water temperature (not to exceed 130°F) will reduce surface tension, increasing the ability to remove chlorides and dirt. Pressure washer PSI must not exceed 900 psig and the nozzle should remain at least 1 foot from the coil to avoid damaging fin edges.

Enter the water temperature used for rinsing

Enter the PSI of the pressure washer used

Prepare for storage control compartment

Is the electronic control equipment in the unit stored in a 5% to 95% RH (non-condensing) environment?

Is there a heat source (light bulb) in the main control panel to prevent the accumulation of atmospheric condensate within the panel?

Enter the location and wattage of the heat source

Is the heat source functional and adequate for current conditions?

Sign off on the rooftop system maintenance