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Servicing should only be performed by a Qualifi ed Service Agent
TROUBLESHOOTING
TEST 7: BLOWER ON, BLOWER PROVER SWITCH CLOSED, NO IGNITER
OPERATION
Conditions:
Power on, but no power to igniter•
Plugs in receptacles•
Blower (Draft Inducer) on•
24V at ignition board E1, Pin 10•
1
2
3
4
E4 Plug
Continuity
Test
Check E1 pin 10 - 24V
Check E4 pin 4 to Ground
Ground
Ground
Check E4 pin 2 to Ground
Figure 26
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 hot surface igniter (HSI).
• replace HSI if needed.
Voltage is present Note ignition board flash code LED. Hot surface igniter (HSI) should work.