Troubleshooting - Carrier 40MBDQ Owner's Manua

Preparing for Extended Shutdown Period
Clean the filters and reposition them in the unit. Operate the unit in
FAN ONLY mode for 12 hours to dry all internal parts. Turn the main
power supply off and remove batteries from the remote control.
System Operation Recommendations
The items outlined in the following list help to assure proper system
operation:
• Replace both remote control batteries at the same time.
• Point the remote control toward the unit display panel when
transmitting a command.
• Keep doors and windows closed while unit is operating.
• Contact an authorized service representative if a problem arises
that cannot be easily resolved.
• Do not perform cleaning or maintenance activities while the unit is
on.

TROUBLESHOOTING

Refer to Table 4 on page 12 before contacting your local dealer.
Clean Air Filter*
Change Remote Control Batteries
OUTDOOR UNIT
Clean Outdoor Coil from Outside
Clean Outdoor Coil from Inside†
Blow Air Over Electric Parts†
Check Electric Connection Tightening†
Clean Fan Wheel†
Check Fan Tightening†
Clean Drain Pans†
* Increase frequency in dusty zones.
†
Maintenance to be carried out by qualified service personnel. Refer to the Installation Manual.
CAUTION
If one of the following conditions occurs, switch off the power
supply immediately and contact your dealer for further assistance.
• The operation light continues to flash rapidly after the unit has
been restarted.
• The remote control buttons do not work.
• The unit continually trips fuses or circuit breakers.
• A foreign object or water enters the air conditioner.
• Other abnormal situations.
OG-40MBDQ-04
Table 2 — Periodic Maintenance
INDOOR UNIT
Specifications subject to change without notice.
• Keep the display panel on the unit away from direct sunlight and
heat as this may interfere with remote control transmissions.
• Do not block air intakes and outlets on the indoor or outdoor units.
Energy Saving Recommendations
The following recommendations will add greater efficiency to the
ductless system:
• Select a comfortable thermostat setting and leave it at chosen
setting. Avoid continually raising and lowering the setting.
• Keep the filter clean. Frequent cleaning may be necessary
depending on indoor air quality.
• Use drapes, curtains or shades to keep direct sunlight from heating
the room on very hot days.
• Limit the unit's run time by using the TIMER function.
• Do not obstruct the air intake on the front panel.
EVERY MONTH EVERY 6 MONTHS

EVERY MONTH EVERY 6 MONTHS
EVERY YEAR

EVERY YEAR







11