Daikin Singlezone Heating and Cooling Units RPS 072D

Open all electrical disconnects and check all power wiring connections.

Start at the power block and check all connections through all components to and including the compressor terminals.

These should be checked again after 3 months of operation and at least annually thereafter.;

Disconnect all electric power to the unit when servicing control panel components.

Before servicing, always inspect units for multiple disconnects to ensure all power is removed from the control panel and its components.

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

Planned Maintenance: Preventive maintenance is the best way to avoid unnecessary expense and inconvenience. Have this system inspected at regular intervals by a qualified service technician.

The required frequency of inspections depends upon the total operating time and the indoor and outdoor environmental conditions.

Clean condenser coils with cold water, if necessary.

Check each circuit’s refrigerant sightglass when the circuit is operating under steady-state, full-load conditions.

Warning: Unauthorized trip point or setpoint adjustment voids all or portions of the unit’s warranty.

Short circuit indicator functional

MMP trip points are factory set

MMP knob rotated counterclockwise to the OFF position

MMP knob rotated clockwise to the ON position

The steps below are necessary only if the unit has been started.

Each circuit is properly pumped down.

All the refrigerant service valves on each circuit are closed.

Valves are tagged as a warning for the technician who restarts the units.

Sign off on the cooling circuits maintenance

When replacing an individual scroll compressor on tandem or trio assemblies, three refrigerant lines must be disconnected and re-assembled:

a. This line (Figure 23) contains the oil sight glass.

b. This line connects to each compressor at “rota-lock” fittings (Figure 24).

c. This line should be disconnected and re-used

a. This is the largest diameter piping.

b. This line is brazed to each compressor.