Fig. 28—System Status Symbols
A03136
SYSTEM STATUS
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 SYMBOL STATUS INDICATES
POWER
PURGE
IGNITER
VALVE
FLAME
ON
OFF
IBC IS ENERGIZED THROUGH 24 VOLT TRANSFORMER.
ON
ON
ON
OFF
OFF
OFF
BLINKING
IBC IS NOT ENERGIZED.
IBC IS ENERGIZING THE DRAFT INDUCER AND AIR
FLOW IS PROVEN.
OFF DURING PURGE CYCLE – DRAFT INDUCER IS NOT
POWERED OR AIR FLOW IS NOT PROVEN.
OFF DURING IGNITER AND RUN CYCLE – NORMAL
OPERATION, PURGE CYCLE COMPLETE
IBC IS LOCKED OUT. PROBLEM COULD INDICATE
FALSE POSITIVE PROOF OF AIR FLOW, BLOCKED
VENT OR INTAKE AIR PIPE OR FLUE WAY.
IBC IS ENERGIZING IGNITER
IGNITER IS NOT ENERGIZED
IBC IS ENERGIZING GAS CONTROL BALVE
TO OPEN.
GAS CONTROL VALVE IS CLOSED.
FLAME HAS BEEN SENSED
NO FLAME SENSED
POLARITY IS REVERSED. VERIFY LINE POWER CONNECTED
TO L1, NEUTRAL TO L2
TROUBLESHOOTING
B
ON
OFF
BLINKING
E
E
E
MORE THAN 40 VAC IS APPLIED TO IBC CONTROL
BLINKING
IBC IS LOCKED OUT. FLAME HAS NOT BEEN PROVEN IN 3 IGNITION
ATTEMPTS. MAYBE DUE TO BROKEN IGNITION LOW FLAME SIGNAL,
NO ELECTRICAL GROUND OR NO GAS.
ON
A
D
—36—
→
To Next Page
Loading...
