Daikin Packaged Rooftop System DPS005AHCG4FW-4

The Rebel unit has many configurable options that can affect the refrigerant charge. Actual unit charge is given on the unit's data plate found on the inside of the control panel.

The Rebel unit uses electronic expansion valves that maintain peak efficiency. Liquid sub-cooling and suction super heat float and should not be used as an indication that charge needs to be added or removed from the system.

If a leak is suspected, the full charge should be removed and weighed. Weight should be compared against the unit nameplate data. Unit should be recharged with the amount given on the unit nameplate.

POE and PVE oil is hygroscopic and does absorb moisture when exposed to atmosphere. Steps should be taken to minimize exposure time to atmosphere during any maintenance where the sealed system is to be opened.

Rebel refrigerant systems use only

NOTICE: Do not use POE oil in DPS 003-015 refrigerant systems and do not use PVE oil in DPS 016-028 refrigerant systems.

The entire system must be evacuated using a suitable vacuum pump.

The quality of vacuum is measured using a suitable micron gauge that has been calibrated.

Warning: This service requires trained personnel with PPE!

Is the current sensing donut on the power wires to the compressor(s) functional?

Is the device monitoring the balance between the three phase power and the neutral conductor?

Note: The device is not intended to provide overcurrent or short circuit protection to the equipment.

Is the device opening the 120V controls circuit in a fault condition?

Is there an open condition on the ground fault interrupter?

Report any issues found during the service

Sign off on the Compressor Ground Fault Interrupter Service

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

Check cabinet air filters and replace if dirty

After heavy snowfall verify that combustion air intakes are not blocked by snow

Periodically check during periods of snow accumulation as drifting may also lead to combustion air intake blockage

Open a door on each section and verify that no moisture or debris is accumulating in the unit monthly during preparation for storage (p.137);

Prepare for storage control compartment

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

It may be necessary to put a heat source (light bulb) in the main control panel to prevent the accumulation of atmospheric condensate within the panel. The location and wattage of the heat source is dependent on local environmental conditions

Is the heat source in the main control panel functional?

Is the heat source adequate for current conditions?

Check the control compartment every two weeks to confirm that the heat source is functional and is adequate for current conditions