Troubleshooting Chart 1
GREEN POWER INDICATOR LIGHT IS
ILLUMINATED ON THE IBC.
YES
CHECK SYSTEM STATUS. IF LOCKED
OUT NOTE FAILURE MODE. WHICH
INDICATOR LIGHT tS BLINKING?
RESET SYSTEM BY TURNING SERVICE
SWITCH OFF THEN ON. IF NOT
LOCKED OUT, SET THERMOSTAT TO
CALL FOR HEAT.
[
l
CIRCULATOR STARTS?
YES
J NO
)
FALSE POSITIVE PROOF OF AIRFLOW. CHECK
AIR PRESSURE SWITCH CONTACTS,
tF CONTACTS ARE CLOSED WITH NO
AIRFLOW, REPLACE PRESSURE SWITCH.
I_ CLOSED
IBC CHECKS NORMALLY OPEN AIR
PRESSURE SWITCH CONTACTS
OPEN
CHART 3
CHART 2
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