62
Is
field
wiring
loose
or
fa
ulty?
Is
power
su
pply
betw
een
59
and
61
Hz?
N
O
YE
S
_ P
_ _ _
Blocking Error
E 4 5
Net frequency error
Correct
wiring
Is
p
ow
er
s
up
pl
y
ci
rcu
it
br
ea
ke
r
loose
or
fa
ulty?
Prov
ide
frequency
st
abilize
d
power
supp
ly
rated at 60 Hz +/-
2%
Replace
Control
M
od
ul
e
YES
YE
S
N
O
N
O
Replace
circuit
br
ea
ke
r
13 - TROUBLE SHOOTING
Fix the c
onnection.
These er
ror m
essages ar
e d
ispla
yed
when
the c
ontrol boar
d detects fau
lt in
blower
m
otor system
.
Check wire c
onnector to blower
.
Check c
onnector J
9 o
n c
ontrol boar
d. I
s
an
y connection loose?
YES
NO
Replac
e b
lower
m
otor
. D
oes this
correct the p
roblem
?
YES
NO
Boiler
is o
per
ating
proper
ly
Replac
e Co
ntrol M
odule
PN 240011320 Rev. G 10/01/2021]