A.O. Smith Master-Fit 100 Series, Руководство по обслуживанию

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Servicing should only be performed by a Qualified Service Technician
TEST 7
–
INDUCER ON
–
PROVER SWITCH AND LOW GAS SWITCH CLOSED.
NO IGNITER OPERATION
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............
Continuity is not indicated
between E4 plug pin 2 to 4.
Check wiring and connection from E4 plug to HSI receiving plug.
Replace HSI Assembly.
Continuity is present. Resistance should be between 11 and 20 Ohms at a temperature of
77°F.
Voltage is not present between
E4, Pin 2 to ground.
Replace ignition board.
Voltage is present. Continue.
Voltage is not present between
E4, Pin 4 to ground.
Check wiring and plug connections to HSI. Replace HSI.
Voltage is present. Note ignition board, Flash code LED. HSI should work.
CONDITIONS:
• Power On.
• Plugs in Receptacles.
• Inducer ON.
• 24V at ignition board E1, Pin 10.
• No power to Igniter.