Carrier 40MBC-03 Owner's Manual page 10

CLEANING, MAINTENANCE AND TROUBLESHOOTING
CAUTION
!
ELECTRICAL SHOCK HAZARD
Failure to follow this caution may result in personal injury
or death.
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
CAUTION
!
EQUIPMENT DAMAGE/OPERATION HAZARD
Failure to follow this caution may result in equipment
damage or improper unit operation.
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
or blown fuses.
Periodic Maintenance
Periodic maintenance is recommended to ensure proper
operation of the unit. Recommended maintenance intervals may
vary depending on the installation environment, e.g., dusty
zones, etc. Refer to Table 2.
CAUTION
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
The coil fins are very sharp. Use caution when cleaning.
Always wear safety protection.
Cleaning the Coil
Clean the coil at the beginning of each cooling season, or when
necessary. Use a vacuum cleaner or a long−bristle brush to avoid
damage to the coil fins.
Air Filters
Remove and clean the air filters once a month.
S
The air filter can prevent the dust or other particulates
from entering the unit. In case of blockage of the filter,
the working efficiency of the air conditioner may greatly
diminish. Therefore, the filter must be cleaned once
every two weeks during long periods of use.
S
If the air conditioner is installed in a dusty place, clean
the air filter frequently.
S
If the accumulated dust is too heavy to be cleaned,
replace the filter with a new one.
NOTE: If air filters show signs of excessive wear or are torn, they
must be replaced. Contact your local dealer for replacement filters.
1. Open the return−air grille by pressing the grille latches
towards the center of the grille.
Fig. 11 − Press the grille latches
2. Bend the filter slightly and remove it.
3. Vacuum the filter.
Fig. 12 − Vacuum the air filter
4. Clean the filter with warm water.
a. A vacuum cleaner or pure water may be used to clean the
air filter. If the dust accumulation is heavy, please use a soft
brush and mild detergent to clean it.
b. The air−in side should face up when using vacuum cleaner.
c. The air−in side should face down when using water.
Fig. 13 − Clean filter with warm water
5. Shake the filter to remove excess water and dry thoroughly.
6. Allow the filter to dry in a cool place.
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Do not dry out the air filter in direct sunlight or with direct
heat or flame.
7. Replace the filter.
8. Press the grille latches towards the center to secure them and
close the Return Air Grille.
10
A150647
A150648
A150649