All installations and services must be performed by qualified service personnel.

VI. TROUBLESHOOTING

NOTICE: BEFORE TROUBLESHOOTING, FAMILIARIZE YOURSELF WITH THE START UP AND CHECKOUT PROCEDURE.

ALL INSTALLATION AND SERVICES MUST BE PERFORMED BY QUALIFIED HEATING CONTRACTORS.

To assist you in troubleshooting this furnace, it is equipped with an integrated ignition control with diagnostics. These diagnostics evaluate what control system has experienced a failure and will activate a flashing light on the control in different sequences to help pinpoint the failure which has occurred.

IMPORTANT: For your convenience, Thermo Products has installed a sight glass in the blower door of this furnace. The number of flashes in groups should be observed through this sight glass and recorded before turning off power to the furnace. Otherwise power to the furnace will be when turning off power or removing the blower door which is equipped with door interlock switch, which will reset the control. Should this occur, it will be necessary to restart the furnace and have the failure occur again.

DIAGNOSTIC FEATURES

The 50A65 control continuously monitors its own operation and the operation of the system. If a failure occurs, the LED will indicate a failure code as shown below. If the failure is internal to the control, the light will stay on continuously. In the case, the entire control should be replaced, as the control is not field-repairable.

If the sensed failure is in the system (external to the control), the LED will flash in the following flash-pause sequences to indicate failure status (each flash will last approximately 0.25 seconds, and each pause will last approximately 2 seconds).

1 flash, then pause

System lockout

2 flashes, then pause

Pressure switch stuck closed

3 flashes, then pause

Pressure switch stuck open

4 flashes, then pause

Open limit switch or rollout switch

6 flashes, then pause

115 Volt AC power reversed

7 flashes, then pause

Low flame sense signal

8 flashes, then pause

Check ignitor or improper grounding

Continuous flashing

Flame has been sensed when

(no pause)

no flame should be present

 

(no call for heat)

The LED will also flash once at power-up.

: Power must be disconnected before servicing.

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Thermo Products CBD1-50N, CHB1-125N, CHB1-75N, CHB1-100N, CBD1-75N, CBD1-100N VI. Troubleshooting, Diagnostic Features
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CHB1-50N, CBD1-50N, CBD1-125N, CBD1-100N, CBD1-75N specifications

Thermo Products offers a range of high-performance heating and cooling solutions tailored to meet the demands of both residential and commercial applications. Among their innovative offerings are the CHB1-50N, CBD1-75N, CHB1-100N, CHB1-125N, and CBD1-100N models, which are designed to provide efficient temperature control while maximizing energy savings.

The CHB1 series, including the CHB1-50N, CHB1-100N, and CHB1-125N, features advanced heating technologies that allow for rapid heating response times. These units are equipped with high-efficiency heat exchangers that ensure optimal heat transfer with minimal energy consumption. A key characteristic of these models is their ability to operate quietly, making them ideal for settings where noise reduction is a priority.

In comparison, the CBD1 series, specifically the CBD1-75N and CBD1-100N, focuses on cooling capabilities that are equally impressive. These units utilize state-of-the-art cooling compressors designed to provide powerful cooling while maintaining low operational costs. The CBD1 models incorporate environmentally friendly refrigerants, ensuring compliance with the latest environmental regulations, which appeals to environmentally conscious customers.

All models in this lineup are designed with user friendliness in mind, featuring intuitive digital controls that allow for precise temperature adjustments. This makes them suitable for end users with varying levels of technical expertise. Additionally, the units support smart home integration, enabling remote monitoring and control via mobile apps, which enhances comfort and convenience for users.

Durability is another hallmark of Thermo Products. The robust construction of both the CHB1 and CBD1 series units ensures resilience against harsh weather conditions and prolonged usage. Furthermore, they come equipped with advanced safety features, including over-temperature protection and automatic shut-off mechanisms, which provide peace of mind for consumers.

In summary, the Thermo Products CHB1-50N, CBD1-75N, CHB1-100N, CHB1-125N, and CBD1-100N models represent a comprehensive solution for effective heating and cooling needs. With their blend of efficiency, innovative technologies, user-friendly design, and durability, these products are positioned to deliver exceptional value and performance in a variety of environments.
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