1.Direct Spark Ignition (DSI) Troubleshooting Terms (definitions) ADC (DSI) Control Module P/N 128973

a.DSI MODULE “RED” L.E.D. INDICATOR LIGHT - This “red” light emitting diode (L.E.D.) light is located in the upper right corner of the DSI module (refer to the top illustration on page 16). This is a diagnostic indicator that simplifies the operational and troubleshooting procedures of the DSI system.

b.LOCKOUT MODE - DSI module “red” L.E.D. indicator light stays on continuously. This indicates there is a system fault and most likely, the fault is the DSI module itself.

c.FLAMEOUT - Burner flame shutdown by the DSI module due to lack of flame verification. This condition occurs only after ignition is evident but is lost. The DSI system will immediately attempt to relight the burner.

d. RECYCLE - Flame has been sensed but lost. Initiate a new sequence (THERE ARE NO RETRIES).

2.Troubleshooting and System Basic Diagnosis ADC (DSI) Control Module P/N 128973

a.Preliminary Steps

The following steps must be performed to minimize the time required to isolate cause of fault.

1) DSI module L.E.D. indicator light is off (no “red” or “green” light).

a) Check for voltage (approximately 24 VAC) across the DSI model terminals “TH” and “GND”...

If voltage (approximately 24 VAC) is evident, then, there is a malfunction within the DSI module itself, and it must be replaced.

If there is no voltage present, then problem is not the DSI module or the ignition system, the problem is elsewhere in the dryer (i.e., dryer’s heat circuit [sail switch, hi-limit circuits, etc.]).

2)DSI module L.E.D. indicator lights “red” for approximately 1.5-seconds (prepurge). This indicates that ALL the controls (including ALL the safety circuits) are functioning and power is being supplied to the DSI module.

3)DSI module L.E.D. indicator lights “green.” This indicates a normal heating cycle. This also indicates that the preliminary diagnostics of the module has confirmed that the DSI module is functional.

4)DSI module L.E.D. indicator lights “red” continuously...“LOCKOUT” mode. This indicates that there is a system fault and most likely the fault is internal to the DSI module. To make sure, open and close the main door. Restart the dryer...if the module LOCKS OUT (“red” L.E.D. indicator light stays on continuously) again, replace the DSI module.

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ADC AD-200 service manual
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AD-200 specifications

The ADC AD-200 is a high-performance analog-to-digital converter designed to meet the needs of a wide range of applications including industrial automation, instrumentation, medical devices, and consumer electronics. This converter is renowned for its combination of speed, precision, and reliability.

One of the standout features of the ADC AD-200 is its exceptional resolution. Offering up to 24 bits of resolution, it provides an outstanding level of detail and accuracy in signal conversion. This high resolution makes it ideal for applications where precision is paramount, such as in audio processing and sensitive measurements in scientific research.

The AD-200 operates at a maximum sampling rate of 1 Msps (mega-samples per second), allowing it to effectively capture fast-changing signals. This speed ensures that the converter can handle dynamic input signals without missing critical data points. Additionally, the device employs a pipelined architecture, which helps to maintain high throughput while keeping latency low—an essential characteristic for real-time applications.

Another critical aspect of the AD-200 is its low input noise and distortion levels. With a total harmonic distortion (THD) of less than 0.01%, the converter maintains signal integrity even when processing high-frequency signals. This feature is crucial in audio and instrumentation applications where signal clarity and fidelity are necessary.

The ADC AD-200 is equipped with advanced digital signal processing (DSP) capabilities, allowing users to perform filtering, averaging, and other signal conditioning tasks on the incoming data stream. This built-in processing capability means users can reduce the load on external processors, streamlining system designs and improving overall efficiency.

The device supports various input voltage ranges, which makes it versatile for multiple applications. It is compatible with single-ended and differential input configurations, providing flexibility for different circuit designs and requirements.

Connectivity features include both serial and parallel interfaces, offering easy integration into various systems. The ADC also comes with a robust software development kit (SDK) that provides necessary drivers and support to facilitate quicker implementation and system optimization.

In summary, the ADC AD-200 is a versatile, high-performance analog-to-digital converter marked by its high resolution, fast sampling rate, low noise levels, integrated DSP capabilities, and flexible connectivity options. These features make it a preferred choice for engineers and developers aiming for excellence in signal processing tasks across diverse industries.
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