Periodic Maintenance, Troubleshooting | Carrier 38MVC, 40MVC, 38MVQ

Table 3—Periodic Maintenance

INDOOR UNIT	EVERY MONTH	EVERY 6 MONTHS	EVERY YEAR
Clean Air Filter*	S		S
Change Remote Control Batteries		S
OUTDOOR UNIT	EVERY MONTH	EVERY 6 MONTHS	EVERY YEAR
Clean Outdoor Coil from Outside		S
Clean Outdoor Coil from Inside†			S
Blow Air Over Electric Parts†			S
Check Electric Connection Tightening†			S
Clean Fan Wheel†			S
Check Fan Tightening†			S
Clean Drain Pans†			S

* Increase frequency in dusty zones.

{Maintenance to be carried out by qualified service personnel. Refer to the Installation Manual

Table 4—Troubleshooting

PROBLEM		POSSIBLE CAUSE	SOLUTION
Unit/System Does Not Work	•	The circuit breaker has tripped or a fuse	• Reset the circuit breaker or replace the fuse with
		has blown.	the specified replacement fuse.
	•	Power failure.	• Restart operation when the power is restored.
	•	Diagnostic lights illuminate.*	• Call your service representative.
	• Voltage is too low.		• Call your service representative.
Cooling is Not Working	•	The filter is blocked with dust.	• Clean the air filter.
Properly	•	Temperature is not set properly.	• Check the temperature and reset if necessary.
	• A window or door is open.		• Close the window or door.
	• The outdoor unit is obstructed.		• Remove the obstruction.
	• The fan speed is too low.		• Change the fan speed selection.
	• The operation mode is in Fan instead of		• Change the operating mode to Cool or reset the
		Cool.	unit.
Heating is Not Working	•	The filter is blocked with dust.	• Clean the air filter.
Properly	•	Temperature is set too low.	• Check the temperature and reset if necessary.
	• A window or door is open.		• Close the window or door.
	• The outdoor unit is obstructed.		• Remove the obstruction.
Unit Stops During Operation	•	The Off timer is not operating correctly.	• Restart the operating mode.
	•	Diagnostic lights illuminate.*	• Call your service representative.

*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.

Manufacturer reserves the right to change, at any time, specifications and design without notice and without obligation.	Replaces: OM38--- 40MV--- 01

40MVQ, 40MVC, 38MVQ, 38MVC specifications

The Carrier 38MVC, 38MVQ, 40MVC, and 40MVQ are advanced air-conditioning systems designed for both residential and commercial applications. These units are recognizable for their commitment to efficiency, reliability, and comfort, making them ideal choices for various environments.

One of the standout features of these models is their high energy efficiency ratings. Both the 38MVC and 38MVQ boast Seasonal Energy Efficiency Ratios (SEER) that exceed industry standards, delivering substantial energy savings over time. The 40MVC and 40MVQ models also continue this trend, featuring enhanced efficiency that translates into lower utility bills and a reduced carbon footprint.

These air-conditioning units utilize Carrier's innovative inverter technology, which allows for variable speed operation. This means that the compressor can adjust its speed according to the cooling demand, resulting in smoother temperature control and less energy consumption. The inverter technology not only maximizes comfort but also contributes to quieter operation, as the systems can run at lower speeds when full capacity is not required.

In addition to efficiency, the Carrier 38MVC, 38MVQ, 40MVC, and 40MVQ are equipped with advanced filtration systems. These systems work to purify the air by reducing allergens and pollutants, ensuring a healthier indoor environment. Some models also come equipped with smart connectivity options, allowing users to control their air conditioning remotely via a smartphone app. This feature adds convenience and helps monitor energy usage effectively.

With durable construction and high-quality components, these units are designed to withstand the test of time, reducing the need for frequent repairs or replacements. They are also built to operate quietly, so they can provide comfort without disturbing the peace of the indoor environment.

In terms of installation flexibility, the Carrier 38MVC, 38MVQ, 40MVC, and 40MVQ can be easily integrated into various existing HVAC systems, thanks to their compatible size and design. This adaptability makes them suitable for a wide range of applications, from small residential homes to larger commercial spaces.

Overall, the Carrier 38MVC, 38MVQ, 40MVC, and 40MVQ models are engineered with cutting-edge technologies that prioritize efficiency, comfort, and ease of use, making them an excellent choice for those looking to enhance their indoor climate control solutions.

Table 3—Periodic Maintenance

OUTDOOR UNIT

EVERY MONTH

EVERY 6 MONTHS

EVERY YEAR

Table 4—Troubleshooting

PROBLEM

POSSIBLE CAUSE

SOLUTION

Unit/System Does Not Work

Properly

Unit Stops During Operation

40MVQ, 40MVC, 38MVQ, 38MVC specifications