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SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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This service handbook is a supplement to the SBN and SBD151/201 Installation and
Operation Manual. The handbook provides information on servicing and troubleshooting State
SBN/SBD30-150/199/ water heaters in the field. While this handbook is not intended to be all
inclusive, it contains:
• step-by-step procedures with illustrations to verify proper installation, operation,
and troubleshooting
• quick reference data to assist in servicing the product line
• answers to common questions encountered in the operation of the product line.
The handbook is intended to be used by licensed plumbing professionals. Reference should
be made to the installation manual accompanying the product. If you are experiencing a
problem not covered in this handbook, please contact the State Technical Information
Department at 1-800-365-0024 or your local State Water
Heater representative for further
assistance. No duplication or reproduction of this book may be made without the expressed
written authorization of the State Water Heaters.
SBN 71-120 thru 85-390, SBD30-150/199 SERVICE HANDBOOK INTRODUCTION
WATER HEATER CONTROL BOARD TROUBLESHOOTING AND DIAGNOSTIC LED
INTERPRETATION.............................................................................................................................33
WATER HEATER CONTROL BOARD TROUBLESHOOTING AND DIAGNOSTIC LED
INTERPRETATION.............................................................................................................................34
TEST 2 – POLARITY CHECK.............................................................................................................35
TEST 3 - CONTINUITY CHECK OF HIGH LIMIT (ECO)....................................................................36
TEST 4 - UPPER TEMPERATURE PROBE CONTINUITY CHECK..................................................37
TEST 5 - CALLING FOR HEAT – NO INDUCER OPERATION.........................................................38
TEST 6 - INDUCER ON.............NO IGNITION..................................................................................39
TEST 7 – INDUCER ON, PROVER SWITCH AND LOW GAS PRESSURE SWITCH CLOSED
....................NO IGNITER OPERATION.............................................................................................40
TEST 8 – IGNITER HEATS .............. NO MAIN BURNER.................................................................41
TEST 9 – IG
NITER HEATS .......NO MAIN BURNER.........................................................................42
TEST 10 - MAIN BURNER IGNITION FOR LESS THAN 5 SECONDS.............................................43
TEST 11 - WATER HEATER SHUTTING OFF BELOW SETTING....................................................44
DISPLAY LIGHTS ON INTEGRATED WATER HEATER CONTROL................................................45
PARTS SBN71-120 thru 85-390 series 100.......................................................................................46
PARTS SBN71-120 thru 85-390 series 100.......................................................................................47
PARTS SBN71-120 thru 85-390 series 100.......................................................................................48
PARTS SBN71-120 thru 85-390 series 108.......................................................................................49
PARTS SBN71-120 thru 85-390 series 108.......................................................................................50
PARTS SBN71-120 thru 85-390 series 108.......................................................................................51
PARTS SBD30-150/199NE.................................................................................................................52
PARTS SBD30-150/199NE.................................................................................................................53