Troubleshooting

40KMC------

310/ 40KMQ------

310

No Room controller LCD display:

•Mis-wiring of the 12 volt power to Room Controller control; verify that + 12 V and Ground are connected to the proper terrminals of the Controller (Reference Installation wiring section for correct connections): after disconnecting the power, correct the wiring problem and re-cycle power.

•Power not online; check that the units main power is connected.

The main control board should be operating normally: after verifing the wiring to the Room Controller, re-cycle the unit power.

•No 12 volts between P and G of terminal block; check the installation of the J6 plug on the main control board: after disconnecting the power, correct the wiring problem and re-cycle power.

Note: Those verifications need to be carried out by qualified personnel only.

+12 volts applied to Room Controller at the correct terminals and still does not operate:

•The Room Controller is damaged; change the Room Controller and re-cycle power.

Note: This operation needs to be carried out by qualified personnel only.

Air conditioner will not start:

•The main switch is switched OFF, place the switch in the ON position.

•The fuses on the main switch are burnt out; replace the fuses.

( this operation need to be carried out by qualified personnel only).

•Wait for 3 minutes: protection against frequent compressor cycling is ON.

•Selected temperature is higher than the room temperature (or lower in the heating mode).

Air conditioner is not supplying enough cooling (or heating):

•Air cannot circulate freely.

•Dirty filter reduces air quantity circulating.

Filter must be cleaned by skilled personnel only.

•Doors and/or windows are open.

•Fan speed has been set to ‘low’.

•Air flow direction is not correct for optimum ventilation.

•Selected temperature is not correct.

A slight mist is emitted from the unit:

•A slight mist, coming out of the unit air outlet, is sometimes noticed during cooling operation. This is due to the cool air coming into contact with the room air.

A slight whistling noise is heard when the air conditioner starts or stops:

•This is due to the refrigerant beginning to circulate or an adjustment of the refrigerant pressures. This is a normal operating condition.

P (Green LED) indicator is flashing:

System malfunction.

Contact service organisation after having ensured that:

•Air circulation is not obstructed.

•Outdoor unit coil is not obstructed and causing severe reduction of air circulation.

•Condensate drainage tube is not obstructed.

As regards fault codes to be communicated to the after-sales

service, please refer to the installation instructions.

Restart air conditioner after having corrected the faults.

Q (Red LED) indicator is illuminated:

•In the heating mode, the LED switches on to indicate an active defrost condition.

The unit emits unpleasant smells:

•Unpleasant smells can accumulate on the air filters and then be dispersed into the room during air conditioner operation.

Switch the unit OFF and contact an authorised service centre to have the filters cleaned.

Restart unit in the ventilation (fan only) mode and open windows to change room air.

The unit makes strange noises:

•Occasionally the unit makes strange noises at start-up, during operation or when it has stopped.

These are generally due to the effect of temperature changes on the plastic parts.

Mist or Vapor Cloud emitted at start-up of Heating operation:

•A mist or cloud of vapor may be emitted from the unit, when switching from a cooling operation to a reverse cycle heating operation. This will occur when the unit has been operating in cooling mode for awhile and then is switched to heating. The combination of the evaporated indoor coil condensate and the dry room air, may result in a cloud of vapor being emitted from the unit. There is no need for concern.

WARNING:

(models with electric heaters):

•If the manual reset, thermal trip device cuts out, switch the unit OFF and ON again at the main switch to reset.

If the malfunction persists, contact your local authorised dealer.

GB - 8

40KMC------301, 40KMQ------301 specifications

Carrier has been a pioneer in the HVAC industry, consistently delivering innovative solutions that prioritize energy efficiency and performance. Among its notable offerings are the Carrier 40KMQ-301 and 40KMC-301 models, which exemplify advanced technologies designed to meet diverse cooling needs.

The Carrier 40KMQ-301 is part of Carrier's ducted split systems, designed primarily for commercial applications. This model boasts a robust cooling capacity, making it suitable for larger spaces that demand efficient climate control. Its key feature includes a high-efficiency scroll compressor, which enhances energy performance while reducing operational noise. Additionally, the 40KMQ-301 includes an advanced microprocessor control system, allowing for precise temperature management and real-time monitoring.

On the other hand, the Carrier 40KMC-301 operates as a multi-split system, providing flexible cooling options for various configurations. This model allows for multiple indoor units to be connected to a single outdoor condenser, optimizing space without compromising performance. The 40KMC-301 emphasizes energy saving, achieving high SEER (Seasonal Energy Efficiency Ratio) ratings, which reflects its efficiency in both cooling and heating modes.

Both models incorporate Carrier's innovative environmentally friendly refrigerants, ensuring less impact on the ozone layer while maintaining high thermal efficiency. Furthermore, they come equipped with a range of airflow configurations, allowing users to tailor the distribution of air according to their unique layout and design requirements.

Durability is another hallmark of these models; they feature corrosion-resistant cabinets that withstand harsh environmental conditions, ensuring longevity and reducing maintenance costs. Integration with smart building technologies is also a highlight, allowing for seamless connectivity with building management systems.

In conclusion, the Carrier 40KMQ-301 and 40KMC-301 represent the forefront of HVAC technology, characterized by high efficiency, flexibility, and advanced control systems. These models not only provide reliable cooling solutions but also contribute to overall energy savings, positioning Carrier as a leader in the sustainable HVAC market.