Cleaning And Maintenance; Air Filters; Indoor Unit Front Panel; Indoor Unit Coil - Carrier 38BNB Owner's Manual

CLEANING AND MAINTENANCE

To avoid the possibility of electric shock, always turn off
power to the system before performing any cleaning or
maintenance to the system. Turn off the outdoor disconnect
switch located near outdoor unit. Be sure to disconnect
indoor unit if on a separate switch.
Operating the system with dirty air filters may damage the
indoor unit and could cause reduced cooling performance.
Intermittent system operation, frost build-up on indoor coil
and blown fuses may also result from system operation
with dirty air filters.
Air Filters —
Remove and clean the air filters when the
Filter indicator light on the unit display panel is lit. See Fig. 13
and 14.
NOTE: If air filters show signs of excessive wear or are torn,
they must be replaced. Contact your local dealer for replace-
ment filters.
1. Open front panel on unit.
2. Pull filters down to remove. (See Fig. 14.)
3. Vacuum filters.
4. Clean with warm water.
5. Shake filter to remove excess water and dry thoroughly.
6. Replace filter by sliding filter behind front grille until fil-
ter snaps in place.
7. Slide Operation Switch on unit to OFF position to reset
Filter status indicator light on 40BN036 units, or press the
ON/OFF button for 5 seconds on 40BN018,024 and 036
units.
8. Slide Operation Switch on unit to REMOTE position to
resume remote control operation.
40BN018,024,030
Indoor Unit (40BN) Front Panel —
front panel on the indoor unit, wipe the outside with a soft, dry
cloth. If necessary, a mild liquid detergent can be applied and
wiped off with a dry cloth.
When cleaning the front panel, do not use water hotter than
105 F and do not pour water onto the fan coil.
Do not use abrasive or petroleum based cleaners as they
may damage the front panel.
Indoor Unit (40BN) Coil —
coil, remove the front panel and vacuum the coil fins. Avoid
bending or damaging the fins.
Outdoor Unit (38BN018-036) Coil —
outdoor unit coil follow the steps below:
Sharp fins and other metal parts on the outdoor unit coil
can cause personal injury during cleaning.
1. Remove any dirt, debris or obstruction from discharge
2. Use a garden hose to spray water on coil. Be sure to spray
Condensate Drains —
the start of each cooling season. Check the flow by pouring wa-
ter into the drain.
POWER/AIRCOND TIMER
FILTER
IR
RECEIVER
Fig. 14 — Removing Air Filters
8
opening.
between coil fins to remove any debris that may inhibit
heat transfer.
Clean all condensate drains at
40BN036
To clean the
To clean the indoor unit
To clean the