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1. Direct Spark Ignition (DSI) Troubleshooting Terms (definitions)
a. DSI MODULE "RED" L.E.D. INDICATOR LIGHT - this "red" L.E.D. (liquid emitting diode) light
is located in the upper right corner of the DSI
module (refer to the top illustration on page
12). This is a diagnostic indicator that
simplifies the operational and troubleshooting
procedures of the DSI system.
b. LOCK-OUT MODE - DSI module "red" L.E.D. indicator light stays on continuously. This indicates
there is a system fault and most likely the fault is the DSI module itself.
c. FLAME-OUT -burner flame shut down by the DSI module due to lack of flame verification. This
condition occurs only after ignition is evident but is lost. The DSI system will immediately
attempt to relight the burner.
d. RECYCLE - flame has been sensed but lost. Initiate a new sequence (THERE ARE NO RETRIES).
2. Troubleshooting and System Basic Diagnosis
a. Preliminary Steps
The following steps must be preformed to minimize the time required to isolate cause of fault.
1) DSI module L.E.D. indicator light is off (no "red" light or no "green" light).
a) Check for voltage (approximately 24 VAC) across the
DSI model terminals "TH" and "GND...
If voltage (approximately 24 VAC) is evident, then, there
is a malfunction within the DSI module itself, and it must
be replaced.
If there is no voltage, and then problem is not the DSI
module or the ignition system, then the problem else-
where in the dryer (i.e., dryers' heat circuit [sail switch,
hi-limit circuits, etc.]).
2) DSI module L.E.D. indicator lights "red" for approximately 1.5 seconds (prepurge). This indicates
that
ALL the controls (including ALL the safety circuits) are functioning and power is being supplied
to the DSI module.
a) DSI module L.E.D. indicator lights "green." This indicates a normal heating cycle. This also
indicates that the preliminary diagnostics of the module has confirmed that the DSI module is
functional.
b) DSI module L.E.D. indicator lights "red" continuously... LOCK OUT MODE. This indicates
that there is a system fault and most likely the fault is internal to the DSI module. To make sure,
open and close the main door. Restart the dryer ... if the module LOCKS-OUT ("red" L.E.D.
indicator light stay on continuously) again, replace the DSI module.