Rapid 7500 136 Installation, operation & service manual - page 148
7500-S
ERIES
I
NSTALLATION
, O
PERATION
AND
S
ERVICE
M
ANUAL
136 of 143
Burner Control Module (continued)
BLINK CODE
SYSTEM FAILURE
RECOMMENDED TROUBLESHOOTING
Code 3-1*R
u
nning/Inter-
lock S
w
itch Pro
b
lem*
R
u
nning or Locko
u
t Interlock
fa
u
lt d
u
ring Pre-P
u
rge.
1. Check
w
iring; correct any errors.
2. Inspect the fan; make s
u
re there is no air intake
b
lockage
and that it is s
u
pply-ing air.
3. Make s
u
re the locko
u
t interlock s
w
itches are f
u
nctioning
properly and the contacts are free from contaminants.
4. Reset and seq
u
ence the relay mod
u
le to Pre-P
u
rge
(place the TEST/RUN S
w
itch in the TEST position, if
a
v
aila
b
le). Meas
u
re the
v
oltage
b
et
w
een terminal 7 and
G (gro
u
nd); line
v
oltage sho
u
ld
b
e present. S
w
itch
TEST/RUN
b
ack to RUN.
5. If steps 1 thro
u
gh 4 are correct and the fa
u
lt persists,
replace the relay mod
u
le.
Code 3-2*R
u
nning/Inter-
lock On D
u
ring Stand
b
y*
Locko
u
t Interlock po
w
ered at
improper point in seq
u
ence
or On in Stand
b
y.
1. Check
w
iring to make s
u
re that the locko
u
t interlock
are connected properly
b
et
w
een terminals 6 and 7.
Correct any errors.
2. Reset and seq
u
ence the relay mod
u
le.
3. If the fa
u
lt persists, meas
u
re the
v
oltage
b
et
w
een
terminal 6 and G (gro
u
nd), then
b
et
w
een terminal 7 and
G. If there is line
v
oltage at terminal 6
w
hen the controller
is off, the controller s
w
itch may
b
e
b
ad or is j
u
mpered.
4. If steps 1 thro
u
gh 3 are correct and there is line
v
oltage
at terminal 7
w
hen the controller is closed and the fa
u
lt
persists, check for a
w
elded or j
u
mpered r
u
nning
interlock or airflo
w
s
w
itch. Correct any errors.
5. If steps 1 thro
u
gh 4 are correct and the fa
u
lt persists,
replace the relay mod
u
le.
Code 3-3*VPS in
Improper State*
VPS (Val
v
e Pro
v
ing S
w
itch) in
w
rong state d
u
ring VPS Test.
1. Check
w
iring, making s
u
re
u
pstream
v
al
v
e is connected
to terminal 9 and do
w
nstream
v
al
v
e is connected to
terminal 17.
2. Cond
u
ct
v
al
v
e seat leakage test
u
sing a manometer.
3. Reset and seq
u
ence the relay mod
u
le; if fa
u
lt repeats,
test VPS (connected to terminal 16) is f
u
nctioning
properly; replace if necessary.
4. Reset and seq
u
ence the relay mod
u
le.
5. If fa
u
lt persists, replace the relay mod
u
le.
Code 4-1*P
u
rge Card
Pro
b
lem*
No p
u
rge card or the p
u
rge
card timing has changed from
the original config
u
ration.
1. Make s
u
re the p
u
rge card is seated properly.
2. Inspect the p
u
rge card and the connector on the relay
mod
u
le for any damage or contaminants.
3. Reset and seq
u
ence the relay mod
u
le.
4. If the fa
u
lt code reappears, replace the p
u
rge card.
5. Reset and seq
u
ence the relay mod
u
le.6.If the fa
u
lt code
persists, replace the relay mod
u
le.
Code 4-2*Wiring Pro
b
lem/
Internal Fa
u
lt*
Pilot (ignition)
v
al
v
e terminal,
main
v
al
v
e, ignition or Main
Val
v
e 2
w
as on
w
hen it
sho
u
ld
b
e off.
1. Remo
v
e system po
w
er and t
u
rn off f
u
el s
u
pply.
2. Check
w
iring; correct any errors.
3. Inspect pilot f
u
el
v
al
v
e(s),
b
oth places, and
connections.
4. Reset and seq
u
ence the relay mod
u
le.
5. If the fa
u
lt persists, replace the relay mod
u
le.