Limit Switch, Burner Ignition | Carrier 48HE003---006 instruction

48HE,HJ

by removing one setscrew. Then remove nuts that hold motor to mounting plate.

6.To reinstall, reverse the procedure outlined above.

Step 12 —Limit Switch

Remove blower access panel (Fig. 8). Limit switch is located on the fan deck.

Step 13 —Burner Ignition

Unit is equipped with a direct spark ignition 100% lockout system. Integrated Gas Unit Controller (IGC) is located in the control box (Fig. 13). A single LED on the IGC provides a visual display of operational or sequential problems when the power supply is uninterrupted. The LED can be observed through the viewport. When a break in power occurs, the IGC will be reset (resulting in a loss of fault history) and the evaporator fan on/off times delay will be reset. During servicing, refer to the label on the control box cover or Table 40 for an explanation of LED error code descriptions.

If lockout occurs, unit may be reset by interrupting power supply to unit for at least 5 seconds.

Table 40—LED Error Code Description*

LED INDICATION	ERROR CODE DESCRIPTION
ON	Normal Operation
OFF	Hardware Failure
1 Flash†	Evaporator Fan On/Off Delay Modified
2 Flashes	Limit Switch Fault
3 Flashes	Flame Sense Fault
4 Flashes	4 Consecutive Limit Switch Faults
5 Flashes	Ignition Lockout Fault
6 Flashes	Induced-Draft Motor Fault
7 Flashes	Rollout Switch Fault
8 Flashes	Internal Control Fault
9 Flashes	Software Lockout

LEGEND

LED — Light-Emitting Diode

*A 3-second pause exists between LED error code flashes. If more than one error code exists, all applicable codes will be displayed in numeri- cal sequence.

†Indicates a code that is not an error. The unit will continue to operate when this code is displayed.

IMPORTANT: Refer to Troubleshooting Tables for additional information.

Step 14 —Main Burners

At the beginning of each heating season, inspect for deterioration or blockage due to corrosion or other causes. Observe the main burner flames and adjust, if necessary.

!CAUTION

FURNACE DAMAGE HAZARD

Failure to follow this caution may result in reduced furnace life.

When servicing gas train, do not hit or plug orifice spuds.

REMOVAL AND REPLACEMENT OF GAS TRAIN (See Fig. 72 and 73)

1.Shut off manual gas valve.

2.Shut off power to unit, tag disconnect.

3.Remove compressor access panel.

4.Slide out burner compartment side panel.

5.Disconnect gas piping at unit gas valve.

6.Remove wires connected to gas valve. Mark each wire.

7.Remove induced-draft motor, igniter, and sensor wires at the Integrated Gas Unit Controller (IGC).

8.Remove the 2 screws that attach the burner rack to the vestibule plate.

9.Remove the gas valve bracket.

10.Slide the burner tray out of the unit (Fig. 73).

11.To reinstall, reverse the procedure outlined above.

INDUCED-	ROLLOUT
DRAFT	SWITCH
MOTOR
MOUNTING
PLATE

BURNER
SECTION	FLUE
	EXHAUST
	VESTIBULE
INDUCED-	PLATE
DRAFT	BLOWER
MOTOR	BLOWER
	HOUSING
MANIFOLD	GAS
PRESSURE	GAS
TAP	VALVE
	C06152

Fig. 72 ---Burner Section Details

C06153

Fig. 73 ---Burner Tray Details

12. Reinstall burners on rack.

48HJ004---007, 48HE003---006 specifications

Carrier has long been a trusted name in the HVAC industry, and its models 48HJ004---007 and 48HE003---006 continue that legacy, offering efficient, reliable climate control solutions. These models are designed for different applications, ensuring optimal performance in a variety of environments.

The 48HJ series features advanced rooftop units that are ideal for commercial settings. They come equipped with high-efficiency scroll compressors that provide superior cooling and heating capabilities. This series is noted for its compact design, allowing for easy installation on rooftops or other constrained spaces. The units offer variable capacity operation, which enables them to efficiently meet varying heating and cooling demands without unnecessary energy consumption.

One of the standout features of the 48HJ series is its use of advanced microprocessor controls. This technology allows for precise temperature management and system diagnostics, enhancing the ease of operation while ensuring maximum comfort. Additionally, the series supports advanced connectivity options, enabling integration with building management systems. This allows for remote monitoring and control, making it easier for facility managers to keep track of performance and energy usage.

On the other hand, the 48HE series specializes in high-efficiency heating and cooling performance. These units are designed for larger commercial spaces and come with robust features for enhanced durability and efficiency. Like the 48HJ series, the 48HE models utilize scroll compressors and are equipped with a high-efficiency fan setup for improved airflow and reduced noise levels.

The 48HE also includes an innovative heat pump option, which allows the system to reverse the cooling process to provide heating, making it versatile across different seasonal demands. Both series are designed with eco-friendly refrigerants that comply with the latest environmental regulations, ensuring a minimized ecological footprint.

In terms of energy efficiency, both the 48HJ and 48HE series hold impressive SEER and EER ratings, contributing to reduced operational costs over time. The units are also built with durable, corrosion-resistant materials, ensuring longevity and low maintenance needs.

In conclusion, Carrier 48HJ004---007 and 48HE003---006 models are designed with cutting-edge technology, energy efficiency, and flexibility in mind. Their robust features make them ideal choices for commercial applications, providing reliable comfort and operational excellence. Whether for cooling or heating, these systems stand out in performance and sustainability, earning Carrier's reputation as a leader in the HVAC market.

Carrier 48HE003---006, 48HJ004---007 Limit Switch, Burner Ignition, LED Error Code Description

Models: 48HJ004---007 48HE003---006