Schwank SER(IR) - Manual (Page 21)

GP-MSER-BX-11A
SER / IR Manual
RD: March 2006
RL: 11A
KH
Page 17
18. TROUBLESHOOTING GUIDE FOR SER / IR- 45 HONEYWELL S87J1034
SET THERMOSTAT TO CALL FOR HEAT
COMBUSTION AIR BLOWER STARTS
YES
NO
YES
NO
CHECK THERMOSTAT
CHECK FOR LINE VOLTAGE POWER SUPPLY
YES
NO
CHECK WIRING CONNECTION AND
REPLACE BLOWER MOTOR IF DEFECTIVE
AIR PROVING SWITCH CLOSED
24 VOLTS AT INGITION CONTROL
YES 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
YES
NO
→SEE APPENDIX 1 PAGE 24 SPARK IGNITION CIRCUIT
→PULL IGNITION LEAD AND CHECK SPARK
→CHECK SPARK GAP, ADJUST TO 3/16” IF REQUIRED
BY MOVING THE GROUND PRONG ONLY
→SPARK OK?
REPLACE IGNITION CONTROL
→CHECK IGNITION CABLE, GROUND WIRING
CERAMIC INSULATOR AND C A P, A N D
CORRECT
→CHECK BOOT OF THE IGNITION CABLE FOR
SIGNS OF MELTING OR BUCKLING
→TAKE PROTECTIVE ACTION TO SHIELD
CABLE AND BOOT FROM EXCESSIVE
TEMPERATURES