112144 - 46
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O. Heating unit is not operating (no heat)...both Dual Microprocessor Controller (DMC) computer
heat indicator dot and “HEAT” indicator are on...but no spark at burner area when the dryer is
first started...
1. Failed DMC computer.
P.
Gas heating unit is not operating (no heat)...both DMC computer heat indicator dot and “HEAT”
indicator are on...but no spark at burner area when the dryer is first started...
1. Fault in sail switch circuit...
a. Sail switch is out of adjustment or has failed.
b. Sail switch damper is not closing or is fluttering...
1) Lint drawer/screen is dirty or clogged.
2) Restriction in exhaust ductwork.
2. Fault in burner hi-limit circuit or thermostat.
3. Fault in basket (tumbler) hi-limit circuit or thermostat.
4. Failed Direct Spark Ignition (DSI) module (burner control).
5. Failed DSI ignitor and/or flame-probe assembly.
Q. No heat (GAS MODELS ONLY)...ignitor sparks but there is no flame at burner...
1. DSI ignitor probe out of adjustment...
a. Reposition ignitor assembly closer to the burner ribbon area. Also check to make sure ribbon is flush
ALL
around the top of the burner tube (ribbon should not
stick up at any area).
b. Check gap between ignitor assembly and top of the burner. Gap
must be
set 1/8” +/- 1/32” (3.175 mm +/-
0.79248 mm).
2. Failed ignitor/flame-probe assembly or problem with wiring connections to the assembly.
3. No gas (check shutoff valves) or insufficient (low water column [W.C.] pressure) gas supply.
4. Failed DSI module.
5. Failed gas valve.
R. No heat (GAS MODELS ONLY)...ignitor sparks, burner goes on and off right away...
1. DSI flame sensor (probe) out of adjustment...reposition closer to the flame area.
2. Failed DSI flame sensor (probe).
3. Sail switch is fluttering...
a. Lint drawer/screen is dirty or clogged.
b. Restriction in exhaust ductwork.
4. Insufficient make-up air.
5. Failed DSI module.
Summary of Contents for AD-320
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