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16. TROUBLESHOOTING GUIDE
TURN HEATER ON :
YES
24 VOLTS INTO DSI CONTROL
YES
24 VOLTS OUT FROM DSI CONTROL
YES
24 VOLTS AT GAS CONTROL
YES
GAS VALVE OPENS.
YES
SPARK ACROSS IGNITER.
IS HIGH VOLTAGE SPARK
OK ?
YES
ENSURE THE MANUAL KNOB
ON THE VALVE IS OPEN AND
THAT THERE IS GAS SUP-
PLY TO THE VALVE.
YES
NEXT PAGE
*CHECK 120 V AT PRIMARY TRANSFORMER
*CHECK VOLTAGE OUT AT SECONDARY.
*IF THERE IS NOT 24V TO SECONDARY....
.......REPLACE THE TRANSFORMER
NO
*CHECK 24V WIRING FROM TRANSFORMER
TO IGNITION CONTROL / AND CHECK IF
CORRECT GAUGE OF WIRE FOR DISTANCE.
*REPLACE WIRES IF NECESSARY.
NO
*sportSchwank 30 ONLY: CHECK THAT GAS
SUPPLY PRESSURE EXCEEDS 4.5" W.C. TO
CLOSE LOW GAS PRESSURE SWITCH .....
REMEDY GAS PRESSURE OR REPLACE
SWITCH IF DEFECTIVE
*CHECK FOR 24 VAC ACROSS GAS VALVE
TERMINALS ON CONTROL. IF NO VOLTAGE,
.........REPLACE CONTROL.
NO
*ENSURE GAS IS TURNED ON AT
VALVE.*CHECK ELECTRICAL CONNECTIONS
AT
CONTROL & GAS VALVE.
NO
*CHECK 24V WIRING CONTINUITY FROM DSI
IGNITION CONTROL TO GAS VALVE, RE
IF 24V IS PRESENT AND VALVE DOES NOT
OPEN.......REPLACE VALVE
NO
*PERFORM IGNITION LEAD TEST DESCRIBED
IN "SPARK IGNITION CIRCUIT".
*CHECK DSI MODULE IGNITION POST FOR
NO
DEFECTS.
*SPARK IGNITER MAY BE OUT OF POSITION.
*CHECK BOOT OF THE IGNITION CABLE FOR
SIGNS OF MELTING OR BUCKLING. TAKE
PROTECTIVE ACTION TO SHIELD CABLE &
BOOT FROM EXCESSIVE TEMPERATURES.
*CHECK CERAMIC INSULATOR FOR CRACKS *
*CHECK SPARK GAP, 1/8"-3/16" .
*CHECK IGNITION CABLE, AND GROUND
WIRE,
Page 17
sportSchwank Manual
IM080731
RD: APR 2019
RL: 01B
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