32
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
Comfort Control
2
System™
BOARD REPLACEMENT
Verification of Comfort Control
2
™ 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 Comfort Control
2
System™ to access the installer
menus using the thermostat). Reference the Air Handler Diagnostic Code Table in
Section 5.19.
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
control board. Reinsert the memory card into the replacement control board.
13.4 BLOWER MOTOR AND WHEEL
Inspect the blower motor and wheel for cleanliness. With the system air filter in place, it
should be several years before it would become necessary to clean the blower motor
and wheel.
• If it becomes necessary to remove the blower assembly from the unit, see instruc-
tions on removal and disassembly of motor, blower and heater parts.
• The blower motor and wheel may be cleaned by using a vacuum with a soft brush
attachment. Remove grease with a mild solvent such as hot water and detergent. Be
careful not to disturb the balance weights (clips) on the blower wheel blades. Do not
drop or bend wheel as balance will be affected.
!
WARNING
Disconnect all power to unit before installing or servicing. More than one dis-
connect switch may be required to de-energize the equipment. Hazardous volt-
age can cause severe personal injury or death.
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.
FIGURE 23
Comfort Control
2
System™ CONTROL BOARD REPLACEMENT
MEMORY CARD
TETHER
Содержание RHPL-HM2421JC
Страница 37: ...37 FIGURE 29 AIR HANDLER EQUIPPED WITH Serial Communication WIRING DIAGRAM...
Страница 38: ...38...
Страница 39: ...39...
Страница 40: ...40 CM 0411...