51
E.
“No Heat” drive and blower motors run, display reads normal (Gas Models)...
1. Check for voltage across terminal block nos. 3 and 7.
If no voltage is present, problem is bad wire or broken terminal from terminal block no. 3 to MP harness
connector pin 4.
2. If voltage is present, check for voltage across terminal block nos. 4 and 7.
If no voltage is present, problem is bad wire or broken terminal from terminal block 3 to basket (tumbler)
hi-limit switch and back to terminal block no. 4, or faulty basket (tumbler) hi-limit switch.
3. If voltage is present, check for voltage across Direct Spark Ignition (DSI) module “TH” and “GND.”
If no voltage is present, check voltage through the sail switch and burner hi-limit harness against ground.
Also check for voltage at the terminals of both components. If voltage is not passing through any one (1)
of the two (2) components, replace that component.
4. If voltage is present, refer to DSI Technical Manual (P/N 450119), or if equipped with
ADC
style DSI
module refer to Technical Manual (P/N 450142).
F.
“No Heat” drive and blower motors run, display reads normal (Steam Models)...
1. Check for voltage across terminal block nos. 3 and 7.
If no voltage is present, problem is bad wire(s) or termination(s) between terminal block 3 to MP harness
connector pin 4.
2. If voltage is present, check for voltage across terminal block nos. 4 and 7.
If no voltage is present, problem is bad wire(s) or termination(s) from terminal block 3 to basket (tumbler)
hi-limit switch and back to terminal block 4, or faulty basket (tumbler) hi-limit switch.
3. If voltage is present, across terminal block nos. 4 and 7, check for voltage across the Pneumatic Steam
Damper Solenoid (red and green wires).
If no voltage is present, problem is bad wire(s) or termination(s) between terminal block nos. 4 and 7 and
the Damper Solenoid.
If voltage is present, problem is faulty Damper Solenoid.
Summary of Contents for AD-758
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