RT-SVX056D-GB
44
End user Routine Maintenance
Some of the periodic maintenance functions for the
unit can be undertaken by the end user. This includes
replacing (disposable) or cleaning (permanent) air filters,
cleaning unit cabinet, cleaning the condenser coil, and
carrying out a general unit inspection on a regular basis.
WARNING!
Disconnect the power supply before
removing access panels to service the unit. Failure to
disconnect power before attempting any servicing can
result in severe injury or death.
Air filters
It is very important for the central duct system air filters
and drive box filters to be kept clean.
These should be inspected at least once a month when
the system is in constant operation (in new buildings,
the filters should be checked every week for the first
four weeks). If disposable-type filters are used, they
should only be replaced with ones of the same type and
size.
The economizer fresh air filter should be inspected
(washed if needed) at least once a month.
Note:
Do not attempt to clean disposable filters.
Permanent filters can be cleaned by washing with a
mild detergent and water. Ensure that the filters are
thoroughly dry before reinstalling them in the unit (or
duct system).
Note:
Replace permanent filters when required or at
least annually if washing fails to clean them, or they
show signs of deterioration. Be sure to use the same
type and size as were originally installed.
Condenser coil
Unfiltered air circulates through the unit’s condenser
coil and can cause the coil’s surface to become clogged
with dust, dirt, etc. To clean the coil, brush the coil
surface in the direction of the fins with a soft bristled
brush.
Keep all vegetation away from the condenser coil area.
Hot water coil (option)
Stop the unit. Do not disconnect the main supply to the
unit. This will permit the anti-frost protection to continue
to operate, and avoid water to freeze-up in the coil.
Service Technician Maintenance
Before the cooling season, your service technician may
examine the following areas of your unit:
• Filters, for cleaning or replacement
• Motors and drives system components
• Economizer gaskets, for replacement if necessary
• Condenser coils, for cleaning
• Safety controls, for mechanical cleaning
• Electrical components and wiring, for replacement
and tightening of connections as necessary
• Condensate drain, for cleaning
• Unit duct connections, to ensure they are physically
sound and sealed to the unit casing
• Unit mounting support, to ensure that it is sound
• The unit, to ensure there is no obvious deterioration
Before the heating season, your service technician may
examine the following areas of your unit:
• The unit, to ensure that the condenser coil can
receive the required airflow (that the condenser fan
grille is not obstructed)
• The control panel wiring, to verify that all electrical
connections are tight, and that wire insulation is
intact
Troubleshooting Alarm and Warnings
The optional control display has the ability to provide
the service personnel with some unit diagnostics and
system status information.
1. Step the system through all of the available modes,
and verify operation of all outputs, controls, and
modes. If a problem in operation is noted in any
mode, proceed to troubleshooting search.
2. Refer to the individual component test procedures if
other microelectronic components are suspect.
3. In addition review carefully the components which
can lead to the alarm: temperature sensor, zone
temperature sensor, clogged filter switch
Maintenance
