→ Electrical Controls and Wiring, Troubleshooting

→ELECTRICAL CONTROLS AND WIRING

There may be more than 1 electrical supply to the unit. Check accessories and cooling unit for additional electrical supplies.

The electrical ground and polarity for 115-v wiring must be maintained properly. Refer to Fig. 10 for field wiring information and to Fig. 12 for unit wiring information.

NOTE: If the polarity is not correct, the STATUS LED on the control center will flash rapidly and prevent the furnace from operating. The control system also requires an earth ground for proper operation of the control board and flame-sensing electrode.

The 24-v circuit contains an automotive-type, 3-amp fuse located on the control board. (See Fig. 11.) Any direct shorts of the 24-v wiring during installation, service, or maintenance will cause this fuse to blow. If fuse replacement is required, use ONLY a fuse of identical size.

With power to the unit disconnected, check all electrical connec- tions for tightness. Tighten all screws on electrical connections. If any smoky or burned connections are found, disassemble the connection, clean all parts, strip wire, and reassemble properly and securely.

Reconnect electrical power to the unit and observe unit through 1 complete operating cycle. Electrical controls are difficult to check without proper instrumentation; if there are any discrepancies in the operating cycle, contact your dealer and request service.

For an explanation of fault codes, refer to service label located on blower access door or Fig. 13, and the troubleshooting guide.

The control center stores 1 fault code (the last fault to occur) for a period of 48 hrs or until the 115- or 24-v power is interrupted.

NOTE: Removing blower access door will open blower access door switch and terminate 115-v power to control center, and fault code will be erased. Look into blower access door sight glass for current LED status.

1. To retrieve fault code, proceed with the following:

NOTE: NO thermostat signal may be present at control center, and all blower time delay off periods must be completed.

a.Leave 115-v power to furnace turned on.

b.Look into blower access door sight glass for current LED status.

NOTE: Leave blower access panel installed to maintain power to control center to view current LED status.

c.Remove control access door.

d.BRIEFLY remove either wire from the main limit switch until LED goes out, then reconnect it.

NOTE: If wire to main limit is disconnected longer than 4 sec, main blower starts, and retrieval request is ignored.

2.When above items have been completed, the following will occur:

a.LED flashes a fault code 4 times. Record this fault code for further troubleshooting.

b.Inducer motor operates for 10 sec, then turns off.

c.Hot surface ignitor is energized for 15 sec, then de- energized.

d.Main blower operates at cooling speed for 10 sec, then turns off.

e.Main blower operates at heating speed for 10 sec, then turns off.

Items a through e above will assist in furnace troubleshooting since all components are functionally operated except the gas valve. This procedure is also referred to as "Component Test."

3.Operate furnace through 1 heat cycle to test for proper operation and check LED status.

4.If furnace is operating properly and LED indicates proper operation, replace control access door.

5.Component Test can also be initiated by performing the following:

a.Remove control access door.

b.Remove blower access door.

c.Manually close blower access door switch.

Blower access door switch opens 115-v power to control center. No component operation can occur. Caution must be taken when manually closing this switch for service purposes. Failure to follow this warning could result in personal injury or death.

d. BRIEFLY short (jumper) TEST, 1/4-in. quick-connect terminal on control center (adjacent to LED diagnostic light) and Com terminal on thermostat connection block. (See Fig. 11.)

NOTE: If TEST to Com terminals are jumpered longer than 2 sec, LED will flash rapidly, and retrieval request will be ignored.

e.Component Test will function as described in item 2 above.

f.Check LED status.

g.If LED status indicates proper operation, release blower access door switch, replace blower access door, and replace control access door.

TROUBLESHOOTING

Refer to the service label. (See Fig. 13.) Pages 10 and 11 contain a troubleshooting guide. This guide can be a useful tool in isolating furnace operation problems. Beginning with the word "Start," answer each question and follow the appropriate arrow to the next item.

The guide will help to identify the problem or failed component. After replacing any component, verify correct operation sequence.

58RAV, 58PAV specifications

The Carrier 58RAV and 58PAV are two exceptional models in Carrier's lineup of gas furnaces, renowned for their efficiency, reliability, and innovative features. Designed to provide superior heating performance, these models boast several advancements that cater to modern residential needs.

One of the defining features of the Carrier 58RAV and 58PAV is their exceptional energy efficiency. Both models achieve high Annual Fuel Utilization Efficiency (AFUE) ratings, making them ideal choices for homeowners looking to reduce energy consumption and lower utility bills. The 58RAV offers a variable-speed blower motor that adjusts airflow according to the temperature demand, providing a more consistent heating experience and enhancing overall comfort.

In terms of technology, the 58RAV and 58PAV are equipped with Carrier's Infinity Control technology. This intelligent system allows for precise temperature control throughout the home, ensuring that every room is evenly heated. Homeowners can easily manage their heating system via a smartphone application, making it convenient to adjust settings from anywhere.

Another notable characteristic of these models is their quiet operation. The 58RAV and 58PAV are engineered with sound-reducing features that minimize noise levels. This is especially beneficial for installations near living spaces, as it contributes to a more peaceful indoor environment.

Safety and durability are also key considerations in the design of the 58RAV and 58PAV. Both models come equipped with a robust heat exchanger constructed from high-quality aluminized steel, which enhances longevity and reliability. Furthermore, an integrated safety system ensures that the furnaces operate safely, preventing concerns related to gas leaks and overheating.

Installation flexibility is a significant advantage of both models. They are designed to fit into various spaces, with options for different venting configurations, making them suitable for a wide range of home layouts.

In conclusion, the Carrier 58RAV and 58PAV gas furnaces represent a perfect blend of efficiency, technology, and reliability. Their advanced features, such as variable-speed motors, smart controls, and whisper-quiet operation, make them ideal solutions for homeowners seeking optimal heating performance while maintaining energy efficiency. The commitment to safety and durability further solidifies Carrier's reputation as a leader in the heating industry, ensuring that these models will provide warmth and comfort for years to come.