SBN71-120 thru SBN85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
WATER HEATER CONTROL BOARD TROUBLESHOOTING AND DIAGNOSTIC LED INTERPRETATION
TEST 1 – 120VAC POWER CHECK
●No Green display “Power” LED on.
●Plugs are in receptacles.
●Supply power breaker is not “open”
●On/Off heater switch is “On”.
White Rodgers Integrated Control
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| 120 V. AC check to water heater ON/OFF switch |
TEST 1 |
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Check for | |
| 115 V. AC check to E13 Terminal and 2B receptacle. |
IF | Then |
voltage is not present from on/off switch center | Check conditions above |
black wire to ground | Check wiring from switch to break box |
Power is present from center on/off terminal | Check power from on/off switch to ignition board terminal |
| E13 |
Voltage is not present at E13 to ground | check wiring from on/off. |
| Replace on/off switch. |
Power is present at E13 | Check power from E14 to water heater control E2 receptacle |
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Voltage is not present from water heater control receptacle | Check wiring from ignition control board E14 to water heater |
E2 black to ground | control receptacle E2. |
| Replace ignition control board. |
Power is present at E2. | Green LED should be on. |
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State Water Heaters | 33 | Technical Training Department |
Ashland City, Tennessee © 2007 |
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