CleaverBrooks CBT User Manual

750-382
CBT
5-23
Troubleshooting
M.3. Flame Rod (Ion-
ization Electrode)
grounding itself
Check flame signal and
inspect flame rod posi-
tion.
Increase the gap
between the flame rod
tip to the burner canis-
ter surface. Replace
flame rod if damaged.
N. Lockout 122 Ligh-
toff rate proving failed
N.1. Blower speed sig-
nal cable is too close to
ignition cables
Observe RPM on dis-
play during trial for
ignition
Route blower signal
cable at least 12" away
from ignition cables.
Clear Lockout and try
again
N.2. Blower speed
control not functioning
properly
On display screen,
compare Fan speed to
Firing rate command.
If blower/fan speed
does not respond to
Firing rate command,
perform the following
Diagnostic Checks.
If Fan speed is slow to
respond to Firing rate
command, adjust the
Fan gain up and down
parameters in Fan Con-
figuration group for
better response.
Check that blower sig-
nal cable is securely
connected at both ends
-- Falcon control J2
socket and blower
speed control signal
socket.
Secure blower signal
cable connections.
Check blower AC
power fuse and con-
nections.
If AC power not pres-
ent replace fuse.
If AC power low, check
blower wiring circuit
for proper connec-
tions. Check ground to
boiler control panel.
With boiler demand is
off, temporarily discon-
nect blower signal
cable. With AC power
connected, blower
should go to max
speed.
If blower does not
respond, recheck
blower AC power cir-
cuit. If AC power is
OK, replace blower.
Clear Lockout and try
again
If condition persists,
contact factory
Problem Display Message Possible Cause/Symp-
tom
Diagnostic Check Corrective Measures

CleaverBrooks CBT Specifications

General

Brand	CleaverBrooks
Model	CBT
Category	Boiler
Language	English