SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
TEST 7 - INDUCER ON – PROVER SWITCH AND LOW GAS SWITCH
CLOSED – NO IGNITER OPERATION
Conditions:
Power on
Plugs in receptacles
Inducer on
24V at ignition board E1, Pin 10
No Power to igniter Note: Flash code of LED
Check E4 pin 4 to Ground
Continuity Test
E4 Plug
Check E1 pin 10
24V
Check E4 pin 2 to Ground
TEST 7
Voltage check and continuity check of hot surface igniter circuit
Continuity check - Power off- Plug removed from E4 receptacles Nominal 80 VAC check - Plug in E4- Power "On"
If… | ...then |
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continuity is not indicated between E4 | check wiring and connection from E4 plug to |
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HSI receiving plug |
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plug pin 2 to 4. |
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replace HSI Assembly |
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continuity is present | resistance should be between 11 and 20 Ohms |
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at a temperature of 77°F |
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voltage is not present between E4, Pin 2 | replace ignition board |
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to ground |
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voltage is present | continue |
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voltage is not present between E4, Pin 4 | check wiring and plug connections to HSI |
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to ground | replace HSI |
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voltage is present | note igntion board, Flash code LED |
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HSI should work |
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©2003 | 32 | Technical Training Department | |
Ashland City, Tennessee
