Troubleshooting - Carrier BW9 Series Installation Instructions Manual

THE INDICATOR LIGHTS TRACK THE
OPERATING SEQUENCE. IF THE SYSTEM LOCKS OUT, THE LIGHTS
INDICATE THE POINT IN THE SEQUENCE OF OPERATION WHERE LOCKOUT
OCCURS. IF THIS TABLE DOES NOT READILY PROVIDE THE REASON FOR
BOILER MALFUNCTION OR NON-OPERATION, REFER TO THE FOLLOWING
PAGES FOR MORE DETAILED TROUBLESHOOTING PROCEDURES.
LIGHT STATUS
ON
IBC IS ENERGIZED THROUGH 24 VOLT TRANSFORMER.
POWER
IBC IS NOT ENERGIZED.
OFF
IBC RECEIVES MORE THAN 40 VAC
BLINKING
IBC IS ENERGIZING THE DRAFT INDUCER AND AIR
ON
FLOW IS PROVEN.
OFF DURING PURGE CYCLE
POWERED OR AIR FLOW IS NOT PROVEN.
PURGE
OFF
OFF DURING IGNITER AND RUN CYCLE
OPERATION, PURGE CYCLE COMPLETE
IBC IS LOCKED OUT. PROBLEM COULD INDICATE
FALSE POSITIVE PROOF OF AIR FLOW, BLOCKED
BLINKING
VENT OR INTAKE AIR PIPE OR FLUE WAY.
ON
IBC IS ENERGIZING IGNITER
IGNITER
OFF IGNITER IS NOT ENERGIZED
IBC IS ENERGIZING GAS CONTROL VALVE
ON
TO OPEN.
VALVE
OFF GAS CONTROL VALVE IS CLOSED.
BLINKING IBC IS LOCKED OUT. FLAME HAS NOT BEEN PROVEN IN 3 IGNITION
ATTEMPTS. MAY BE DUE TO BROKEN IGNITER LACK OF OR LOW
FLAME SIGNAL OR NO GAS.
ON BRIGHT
FLAME FLAME PROVEN
OFF FLAME UNPROVEN
CHECKING FOR FLAME SIGNAL (DURING TRIAL FOR IGNITION)
ON DIM
Fig. 25 --- System Status Symbols
SYSTEM STATUS
INDICATES
DRAFT INDUCER IS NOT

TROUBLESHOOTING

27
NORMAL
A06103