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I - GENERAL INFORMATION (cont.)
HOW TO USE THIS MANUAL
It is intended for this manual to be used by qualified service personnel for the primary purpose of
troubleshooting analysis and repair of this tankless gas fired water heater. Understanding the basic
operation of the "Main Components" and the "Sequence of Operation" sections of this manual will
contribute greatly to your success in the troubleshooting analysis of this product.
Sections of this manual reference general information and specifications. The primary focus is trouble
shooting analysis and repair. The trouble shooting section consists of the following:
• Error Message Table.
Table showing Error Message as displayed on remote control indicating likely fault and
remedy.
• Quick Reference Diagnostics Points Table.
This guide will identify the specific diagnostic point for each component as well as the
correct electrical value for each component.
• Troubleshooting Flow Chart.
The "Trouble Shooting Flow Chart" identifies fault potentials and directs service to
the appropriate diagnostic check points. The check points are identified in the
troubleshooting procedure and are shown on the wiring diagram by means of an
encircled letter with a subscript number.
Example:
This chart will also refer to a page number to reference a pictorial version of the
component analysis as outlined in the "Trouble Shooting Procedure" section of this
manual.
• Trouble Shooting Procedure.
Pictorial procedure including diagnostic points, electrical values and referral to
"Service Procedure" for replacement of faulty components.
• Service Procedure.
Pictorial procedure for removal and replacement of components.
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