Carrier 40MAQ, User Manual

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Copyright 2020 Carrier Corp.
D
3300 Riverwood Parkway Atlanta GA, 30339 Edition Date: 08/20 Catalog No. OM-40MAQ-07
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Replaces: OM-40MAQ-06
TROUBLESHOOTING
Refer to Table 2 before contacting your local dealer.
Table 1 — Periodic Maintenance
* Increase frequency in dusty zones.
†
Maintenance to be carried out by qualified service personnel. Refer to the Installation Manual
Table 2 — Troubleshooting
* Diagnostic lights are a combination of lights that will illuminate in the display area on the unit. They are a combination of the lights you see during normal operation.
INDOOR UNIT EVERY MONTH EVERY 6 MONTHS EVERY YEAR
Clean Air Filter*
 
Replace Carbon Filter
 
Change Remote Control Batteries
OUTDOOR UNIT EVERY MONTH EVERY 6 MONTHS EVERY YEAR
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†

PROBLEM POSSIBLE CAUSE SOLUTION
Unit/System Does Not Work
 The circuit breaker has tripped or a fuse has
blown.
 Diagnostic lights illuminate.
*
 Voltage is too low.
 Reset the circuit breaker or replace the fuse with the
specified replacement fuse.

Call your service representative.
 Call your service representative.
Cooling is Not Working Properly
 The filter is blocked by dust.
 Temperature is not set properly.
 A window or door is open.
 The outdoor unit is obstructed.
 The fan speed is too low.
 The operation mode is in Fan instead of Cool.
 Clean the air filter.
 Check the temperature and reset if necessary.
 Close the window or door.
 Remove the obstruction.
 Change the fan speed selection.
 Change the operating mode to Cool or reset the unit.
Heating is Not Working Properly
 The filter is blocked with dust.
 Temperature is set too low.
 A window or door is open.
 The outdoor unit is obstructed.
 Check the temperature and reset if necessary.
 Close the window or door.
 Remove the obstruction.
Unit Stops During Operation
 The Off timer is not operating correctly.
 Diagnostic lights illuminate.
*
 Restart the operating mode.
 Call your service representative.