47
13.1 AIR FILTER (Not Factory Installed)
Check the system filter every ninety days or as often as found to be necessary and if
obstructed, clean or replace at once.
IMPORTANT: Do not operate the system without a filter in place.
13.2 INDOOR COIL - DRAIN PAN - DRAIN LINE
Inspect the indoor coil once each year for cleanliness and clean as necessary. It is nec-
e
ssary to remove the filter and check the return air side of the coil for debris.
IMPORTANT: Do not use caustic household drain cleaners, such as bleach, in the con-
densate pan or near the indoor coil. Drain cleaners will quickly damage the indoor coil.
13.3 THE COMFORT CONTROL
2
SYSTEM™ CONTROL BOARD
REPLACEMENT
Verification of the Comfort Control
2
System™ control board failure is required before
replacement. Access the diagnostic codes using a service tool or access the installer
menus using the thermostat (the system must be wired as a serial communicating sys-
tem to access the installer menus using the thermostat). Reference the Air Handler
Diagnostic Code Table in Section 5.20.
NOTE: The memory card is attached to the control box with a tether. The tether has an
identification label that can be used to identify the memory card if replacement is need-
ed.
IMPORTANT: Do not cut the tether attached to the memory card when replacing the
Comfort Control
2
. Reinsert the memory card into the replacement Comfort Control
2
.
CAUTION
In compliance with recognized codes, it is recommended that an auxiliary
drain pan be installed under all evaporator coils or units containing evaporator
coils that are located in any area of a structure where damage to the building
or building contents may occur as a result of an overflow of the coil drain pan
or a stoppage in the primary condensate drain piping. See accessory section
in this manual for secondary horizontal drain pan RXBM-ABXX.
!
WARNING
Units with circuit breaker(s) meet requirements as a service disconnect
switch, however, if access is required to the line side (covered) of the circuit
breaker, this side of the breaker(s) will be energized with the breaker(s) de-
energized. Contact with the line side can cause electrical shock resulting in
personal injury or death.
FIGURE 38
COMFORT CONTROL
2
BOARD REPLACEMENT
MEMORY CARD
TETHER
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