WARNING
Electrical shock hazard. Disconnect power to RQTH
before servicing or accessing control compartment.
Failure to do follow these instructions could result in
death or serious injury.
!
NOTICE
Perform regular service and maintenance by
qualified service agency at least once every 12
months to assure safe, trouble free operation and
maximum efficiency.
NOTICE
Verify proper operation after servicing.
Maintenance Schedule
Manufacturer recommends performing following
inspections and maintenance on monthly basis. Units
installed in harsh or dirty environments will require more
frequent inspections and maintenance.
Disconnect power to unit and remove necessary access
panels:
☐
Clean or replace indoor air filter.
☐
Inspect chassis interior for rodent or insect infestation.
Clean if necessary.
☐
Clean & flush condensate drain pan and chassis base pan.
☐
If applicable, verify condensate drain is functioning
properly.
☐
Inspect refrigeration tubing, especially braze joints, for
signs of refrigerant leaks (oil residue). Repair if necessary.
☐
Inspect indoor and outdoor coils. Verify dirt or debris
have not collected on fins. Clean if necessary. Take care
not to damage coil fins when cleaning. Use fin comb to
straighten any bent fins.
☐
Examine control box. Verify all wire connections are
secure.
☐
Verify indoor blower wheels and outdoor fan blades are
secured to their motor shafts.
☐
Verify dirt or debris have not collected on indoor blower
wheels and outdoor fan blades. Use vacuum and soft
brush to clean if necessary.
☐
Verify any ductwork connected to unit is secure and free
of air leaks.
Seasonal Start-Up And Maintenance
Beginning of cooling and heating seasons, complete
mechanical check should be performed and maintenance/
inspections performed as described below.
Disconnect power to unit and remove necessary access
panels:
1.
Remove access panel. Visually inspect equipment.
Look for obvious changes in unit such as damaged coils
or evidence of extended wear on any moving parts.
2.
Check for unusual odors or leaks (examples: burnt
motor windings, water, or refrigerant). Verify base pan
is clean.
3.
Clean or replace return air filter as needed. Check filter
at least once month. Some environments may require
more frequent replacement, depending on particulate
in air stream.
4.
Inspect all electrical connections for frayed wires and
poor connections.
5.
Check fan motors and blower assemblies. Verify screws
and motor mounting hardware are tight.
6.
Centrifugal fan blades and blower cage brush and/or
vacuum as necessary.
7.
Inspect both indoor and outdoor coils. Use fin comb to
straighten out any damaged fins.
NOTICE
Do not use solvent based cleaner to clean coils,
some solvents will produce noxious odor when unit
is in operation or may deteriorate components.
8.
Look for oil leaks or stains on or around all braze joints
and refrigerant lines. Presence of oil here indicates
potentially serious problem, such as refrigerant leak.
9.
Inspect and clean drain pan and drain line(s). Use of
anti-fungicide tablet to keep condensate system free
from bacterial contaminants is recommended.
10.
Verify unit is level for proper operation. Building and
equipment may settle, causing shift in direction of
condensate flow. Verify weep holes along rear flange of
base pan are free of debris.
11.
Air leaks may make the conditioned area
uncomfortably drafty or produce noises. Visually
inspect foam gasket between wall and unit, taking
note of separation between air inlet for condenser
and condenser coil discharge. These two areas must
be sealed off from each other. If you experience poor
cooling operation or erratic operation, check for air
recirculation at condenser coil.
12.
Replace access panels and reconnect electrical power.
MAINTENANCE
Made in USA 17
PN 240010236 REV. D [12/15/2018]
