American Dryer Corp ML-310 Phase 7 service manual First Visual Check

h. Troubleshooting Flowchart - Quick Reference...

First Visual Check

No Spark And System Does Not Work

Is power available

to primary?

No Yes

Determine why voltage is not present.

Is 24 VAC available at transformer?

No Yes

Replace

Transformer.

Reset

or replace hi-limits

Is 24 VAC present from terminal

THS(2) to ground?

No Yes

Are thermostat contacts and hi-limit control contacts closed?

No Yes

Check continuity of wiring to determine why voltage does not exist at THS(2).

Is jumper installed from terminal 5 to ground?

Install
	No	Yes
Jumper.

Open thermostat contacts for 30 seconds. Close contacts and wait for prepurge (if applicable)

period. Is spark present now?

No

Yes

Turn off supply voltage.

Check high voltage cable.

Is it securely attached

to DSI module?

Is condition of high voltage

cable good (not brittle,

No

Yes

burnt, or cracked)?

Securely attach wire

No

Yes

to DSI module

Replace high

voltage cable

Is spark electrode

ceramic cracked

or is electrode

grounded out?

Replace

No

Yes

DSI module

Replace spark electrode

assembly.

System was in lockout.

Observe a complete operating

cycle to determine why

control locked out.

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