Insufficient cooling

maintenance

Maintenance procedures

WARNING

Hazardous voltage!

Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury.

Problem

Possible cause

1.Insufficient air flow due to: a) dirty evaporator; b) ice on evaporator coils (indicates airflow restriction through evaporator); c) dirty filter; d) obstructed discharge air intake; e) fan motor not running; f) evaporator fan or fan wheel slipping on motor shaft

2.Heat gain or loss in room exceeds unit capacity

3.Defective compressor

4.Insufficient refrigerant charge indicated by: a) low wattage; b) condenser air outlet

cold

5.Overcharge of refrigerant indicated by high wattage and sweating of the compressor return line

6.Thermostat not set for full cooling

7.Insufficient airflow through condenser due to: a) dirty condenser; b) loose belt; c) fan loose on shaft

8.Cutout on high pressure

9.Only one refrigerant circuit operational in 2-circuit units

Remedy

1.Correct as follows: a) clean; b) defrost (using fan operation only); c) clean or replace filter; d) remove obstruction; e) check electrical system; f) adjust fan position.Tighten set screw on fan wheel.

2.Refer to original load calculations. Recalculate heat gain or loss.

3.Replace, if necessary.

4.Check refrigerant charge pressure with gauges. If refrigerant is low, recharge system.

5.Reclaim excess refrigerant.

6.Refer to thermostat operating instructions.

7.Correct as follows: a) clean coil; b) verify drive is adjusted correctly; c) tighten fan on shaft.

8.See that air is flowing and that damper is set properly.

9.Reset high pressure cutout on inoperative circuit. Check contactor in inoperative circuit.

Problem

Unit short cycles

Possible cause

1.Remote thermostat

2.Loose connection in electrical unit

3.Thermostat contacts fluttering

4.Air flow to evaporator is restricted

5.Insufficient charge

Remedy

1.Repair or replace.

2.Trace and repair.

3.Repair or replace.

4.Flush or blow dirt out of coil.

5.Reclaim, evacuate, recharge per nameplate.

Problem

Compressor starts and runs, but fan does not run.

Possible cause

1.Faulty switch

2.Open fan motor coil circuit

3.Fan binding on shroud or venturi ring

Remedy

1.Replace.

2.Replace.

3.Adjust fan mounting.

28	SXIH-SVX01B-EN

SCIH specifications

The Trane SCIH, or Smart Communicating Indoor Unit, is a smart HVAC solution designed to provide both efficiency and comfort in commercial and residential spaces. This innovative system represents a significant advancement in climate control technology, integrating state-of-the-art features that cater to modern demands for convenience, connectivity, and sustainability.

One of the standout features of the Trane SCIH is its advanced communication capability. The system utilizes Trane’s proprietary technology to facilitate seamless communication between various HVAC components, enabling real-time monitoring and adjustments. This integration ensures optimal performance by allowing end-users to manage their climate control settings efficiently from a central location or through a smartphone app.

The SCIH is also designed for high energy efficiency. It incorporates variable speed technology that adjusts the compressor and fan speeds according to the specific heating or cooling needs of the space. This not only reduces energy consumption but also minimizes fluctuations in temperature, creating a more comfortable indoor environment. Additionally, the unit's Energy Efficiency Ratio (EER) and Seasonal Energy Efficiency Ratio (SEER) ratings often exceed industry standards, making it an eco-friendly choice for sustainable building practices.

Another characteristic of the Trane SCIH is its compact and versatile design. The unit is engineered to fit in tight spaces, making it suitable for various building types, including retrofits in older structures. Its sleek design enhances aesthetic appeal without compromising performance, a key consideration for both commercial and residential applications.

Safety and ease of use are also priority features of the SCIH. The model includes built-in diagnostics that can identify issues early, enabling prompt maintenance and reducing the risk of system failures. User-friendly interfaces provide intuitive controls, making it accessible for users of all technical backgrounds.

Overall, the Trane SCIH embodies the convergence of technology, comfort, and efficiency. Its smart features, including advanced communication, variable speed technology, and compact design, position it as a leading solution in the HVAC market. This unit not only meets the needs of the present but is also prepared to adapt to future energy standards and user expectations, reinforcing Trane’s commitment to innovative climate solutions.