Schwank ATH Brooder/Agricultural Series - Manual (Page 22)

GP-MATH-BX-10A
ATH / IA Manual
RD: Nov, 2005
RL: 10
KH
Page 18
YES
YES
YES
19. TROUBLESHOOTING GUIDE
SET THERMOSTAT TO CALL FOR HEAT
COMBUSTION AIR BLOWER STARTS
NO
YES NO
CHECK WIRING CONNECTION, FUSE / CIRCUIT
BREAKER.
AIR PROVING SWITCH CLOSED
110 VOLTS AT IGNITION CONTROL
NO
ENSURE THAT THE AIR INTAKE AND FLUE
ARE NOT BLOCKED
ENSURE PRESSURE TUBE IS CONNECTED AND
NOT BLOCKED
CHECK AIR PRESSURE WITH MANOMETER
CHECK AIR PROVING SWITCH IS CLOSING
WHEN BLOWER IS RUNNING
REPLACE DEFECTIVE SWITCHES
SPARK ACROSS IGNITER OR
IGNITER/SENSOR GAP
NO
SEE SPARK IGNITION CIRCUIT (on Page 24)
PULL IGNITION LEAD AND CHECK SPARK
CHECK SPARK GAP, ADJUST TO 1/8” TO 3/16” IF
NEEDED USING THE GROUND PRONG ONLY
SPARK OK?
REPLACE IGNITION CONTROL
CHECK IGNITION CABLE, GROUND WIRING
CERAMIC INSULATOR AND CAP.
CHECK BOOT OF THE IGNITION CABLE FOR
SIGNS OF MELTING OR BUCKLING.
TAKE PROTECTIVE ACTION TO SHIELD CABLE
AND BOOT FROM EXCESSIVE TEMPERATURES.
NO VOLTAGE AT PIN 4 - CHECK THERMOSTAT
CHECK FOR LINE VOLTAGE POWER SUPPLY.
CHECK FOR VOLTAGE AT BLOWER MOTOR
IF VOLTAGE IS PRESENT, REPLACE MOTOR.
cont’d