Daikin DP14U Series, Installation Instructions Manual

34

HOMEOWNER’S ROUTINE MAINTENANCE RECOMMENDATIONS

PACKAGE UNITS   - Dual fuel  & Gas                                                                                                                           

HOMEOWNER’S Routine Maintenance Recommendations

We strongly recommend a bi-annual maintenance checkup be performed

by a 

qualified service agency

 before the heating and cooling seasons begin.

WARNING

HIGH VOLTAGE

DISCONNECT ALL POWER BEFORE SERVICING 

OR INSTALLING THIS UNIT. MULTIPLE POWER 

SOURCES MAY BE PRESENT. FAILURE TO DO SO 

MAY CAUSE PROPERTY DAMAGE, PERSONAL 

INJURY OR DEATH.

Replace or Clean Filter

IMPORTANT NOTE:

 Never operate unit without a filter installed 

as dust and lint will build up on internal parts resulting in loss of 

efficiency, equipment damage and possible fire. 
A return air filter is not supplied with this unit; however, there must 

be a means of filtering the return air. An indoor air filter must be 

used with your comfort system.  A properly maintained filter will 

keep the indoor coil of your comfort system clean. A dirty coil 

could cause poor operation and/or severe equipment damage.

The installer of your unit can tell you where your filter(s) are and 

how to clean or replace them.

Check your return filter(s) at least once every two months. When 

they are dirty, replace or clean as required. Disposable type filters 

should be replaced. Reusable type filters may be cleaned.
NOTE:  Reusable type filters should be washed with warm water, 

dried completely and sprayed with an adhesive according to the 

manufacturers recommendations.                                 

You may want to ask your dealer about high efficiency filters. High 

efficiency filters are available in both electronic and non-electronic 

types. These filters can do a better job of catching small airborne 

particles.

Improper filter maintenance is the most common cause of 

inadequate heating or cooling performance.  Filters should be 

cleaned (permanent) or replaced (disposable) every two months 

or as required.  When replacing a filter, it must be replaced with 

a filter of the same type and size and always make certain the air 

flow arrows on the filter point in the proper direction.

Condenser, Evaporator and Induced Draft Motors

The bearings on the air circulating blower motor, condenser motor 

and the combustion fan motor are permanently lubricated and  

require no further lubrication.

Compressor

The compressor motor is hermetically sealed and does not require 

additional oiling.

Annual Inspection (Qualified Servicer Only)

Your package unit should be inspected by a qualified installer, or 

service agency at least twice every year. This check should be 

performed before the heating and cooling seasons begin. This will 

ensure that adequate combustion air is being drawn and the vent 

system is working properly. Particular attention should be paid to 

the following items. Repair as necessary.

• 

Check physical support of the unit. Ensure it is sound 

without any sagging, cracks, or gaps, around the base.

• 

Check for obvious signs of deterioration of the unit.

• 

Flue Hood and Combustion Air Inlet. Check for blockage 

(wasp nest, etc.) and corrosion.

• 

Flue Hood (Qualified Servicer Only)

• 

Return  Air Connection. Check for physical soundness and 

ensure that the connection is firmly sealed to the package 

unit casing.

• 

Heat exchanger. Check for corrosion and/or obstructions 

within the heat exchanger passageways.

• 

Burners. Check for proper ignition, burner flame, and flame 

sense.

• 

Wiring. Check wires for damage. Check electrical 

connections for tightness and/or corrosion.

• 

Filters. Check that filters are clean and in the proper 

placement in the unit or duct system.

• 

Louvers. Inspect air inlet louvers inside the heat exchanger 

compartments. Ensure the area is clean and free of dirt and 

debris.

Clean Outside Coil (Qualified Servicer Only)

The outdoor coil should be inspected annually. It is important to 

keep the outdoor coil clean. Dirt, leaves, or debris could restrict 

the airflow. If cleaning of the outdoor coil becomes necessary, hire 

a qualified servicer. Inexperienced people could easily puncture 

the tubing in the coil.

 Before Calling Your Servicer

• 

Check the thermostat

 to confirm that it is properly set.

• 

Check  the disconnect switch

 near the unit to confirm that it 

is closed.

• 

Check the electrical panel  for tripped circuit breakers  or 

failed  fuses . Reset the circuit breakers or replace fuses as 

necessary. 

• 

Check  for blockage of the indoor air inlets and outlets. 

Confirm that they are open and have not been blocked by 

objects (rugs, curtains or furniture).

• 

Check  for obstructions on the unit .

 Confirm that it has 

not been covered on the sides or the top. Remove any 

obstruction that can be safely  removed. If  the unit is 

covered with dirt or debris, call a qualified servicer to clean 

it. 

• 

Check the filter.

 If it is dirty, clean or replace it.