A.O. Smith BTR 120-400, Руководство по обслуживанию

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Servicing should only be performed by a Qualified Service Technician
STEP 6: IID MODULE TEST (POWER TO THE PILOT VALVE)
CONDITION:
• 24VAC to module, no pilot.
Using a multimeter, test for 24 VAC between terminal PV and 24 V (GND) on the IID during the 90 second
trial for ignition.
IF THEN
The meter does not read 24 VAC and the IID module
is not between ignition trials:
• Replace the module.
The meter does read 24 VAC: • Go to Step 7.