CleaverBrooks CBT User Manual

Maintenance
5-24
750-382
CBT
O. Lockout 173 Pilot
relay feedback error
O.1. Loose wire or neu-
tral in fuel valve circuit
Check fuel valve wir-
ing from control panel
to gas valve connection
DIN connector. With
power disconnected,
perform continuity
check of each wire
from control panel ter-
minal to fuel valve DIN
connector. Refer to
boiler wiring diagram.
Correct/secure any
loose wire connections
in fuel valve circuit.
Ensure DIN connector
is secured to gas valve.
P. Lockout 174 Safety
relay feedback error
P.1. High ambient tem-
perature inside control
panel.
Measure temperature
in boiler room and
inside control panel.
If room is greater than
120F, ventilate room
with cooler make-up
air. If control panel is
greater than 140F,
ventilate control panel.
P.2. Falcon "pump"
relay output assigned
task, but not used
Refer to boiler wiring
diagram for Falcon
"pump" relay connec-
tions. Access Falcon
Pump Configuration
menu.
Set all pump control
block assignments that
are not being used to
“None”.
P.3. External electrical
noise (e.g. ignition
sparking) near Falcon
control circuit
Check that all electrical
noise sources (e.g.
ignition cables) are
kept away from the
Falcon controller and
connected control cir-
cuit wiring.
Separate and secure all
control wiring from
electrical noise genera-
tors such as ignition
transformer and
cables.
P.4. Faulty safety inter-
lock control (e.g.
ALWCO, HLC, HGPS,
LGPS);
Check function of each
safety interlock switch
in ILK circuit.
Secure wiring connec-
tions or replace faulty
safety interlock control
device.
If condition persists,
contact factory
Flame Failure Q. Lockout 108 Flame
failure in Run
Q.1. Refer to Lockout
109 & 107 Possible
Causes and Corrective
Measures -- except for
Ignitor not sparking
Check Lockout History
for boiler state/status
and cycle run time
when lockout occurred.
If feasible, identify
potential adverse oper-
ating conditions at
time of lockout (e.g.
low fire or high fire?)
and remedy.
Q.2. Poor combustion
tuning
With combustion ana-
lyzer, compare O2 lev-
els at HF and LF with
manual recommeda-
tions.
Retune combustion
settings as necessary.
Problem Display Message Possible Cause/Symp-
tom
Diagnostic Check Corrective Measures

CleaverBrooks CBT Specifications

General

Brand	CleaverBrooks
Model	CBT
Category	Boiler
Language	English