Belimo ECON-ZIP-BASE - Page 39

39
0
6/16 - Subject to change. © Belimo Aircontrols
(
USA
)
, Inc
.
Fault Detection Problem
Diagnostic Action
(in addition to alarm stored / transmitted)
Potential Cause
CA Fault
Code
RAH sensor
detected but
O
AH
se
n
so
r
not
d
etecte
d
S
ensor previousl
y
i
nstalled
i
s not detected
o
r
se
n
so
r h
as
n
o
t
bee
n
i
nstalled -
D
i
ff
erential Enthalpy
• Economizing functioning b
y
differential
temperature with return air humidit
y
limi
t
• Intended con
fi
gurat
i
on o
f
d
iff
erent
i
al enthalp
y
n
ot completed or OAH sensor faile
d
• Intended con
fi
gurat
i
on o
f
s
i
ngle enthalp
y
,
O
AH sensor inadvertentl
y
placed on RAH
t
erm
i
na
l
•
O
AH sensor deleted or set to not installed, but
R
AH sensor left installe
d
A
, B
RAH sensor
d
etecte
d
b
ut
RAT sensor
not detected
S
ensor previously
i
nstalled
i
s not detected
o
r sensor
h
as not
b
een
i
n
s
t
a
ll
ed
-
D
ifferential Enthal
py
• Economizing functioning b
y
OAE single enthalp
y
•
C
han
g
e over limit modified to 28 Btu
/
lb 75°
F
• Intended con
fi
gurat
i
on o
f
d
iff
erent
i
al enthalp
y
n
ot com
p
leted or RAT sensor faile
d
• RAT sensor deleted, but RAH sensor le
f
t
i
nstalle
d
A
,
B
S
AT
se
n
so
r
out of ran
g
e
S
ensor is returning a
v
a
l
ue
th
a
t
is
ou
t
of
th
e
predetermined ran
g
e
• Economizing functionalit
y
disabled
• Freeze detection based on
O
AT onl
y
• Low d
i
scharge l
i
m
i
t control 45°F d
i
sable
d
• Compressor SAT drop error detection disable
d
• Limitin
g
2nd sta
g
e operation based on low SAT
(
SAT Y2 limit
)
disabled
• Th
e
rm
is
t
o
r
fai
l
u
r
e
• Damage to wire increasing resistance
A,
B
S
AT
se
n
so
r
not detected
S
ensor previousl
y
i
n
s
t
a
ll
ed
is
n
o
t
de
t
ec
t
ed
o
r sensor has not been
i
n
s
t
a
ll
ed
• Economizing functionalit
y
disabled
• Freeze detection based on
O
AT onl
y
• Low d
i
scharge l
i
m
i
t control 45°F d
i
sable
d
• Compressor SAT drop error detection disable
d
• Limitin
g
2nd sta
g
e operation based on low SAT
(
SAT Y2 limit
)
disabled
• Sensor never installe
d
• Installed sensor has o
p
en or short
• W
i
r
e
h
a
rn
ess
b
r
o
k
e
n
A,
B
Y2
p
resent
w
i
thout Y1
Ca
ll f
o
r Y2 with
ou
t
ca
ll
f
or Y1
• Enable 1st sta
g
e
f
ree cool
i
n
g
or mechan
i
cal
coolin
g
in accordance chan
g
e over
con
fi
gurat
i
o
n
• I
f
Y1
f
ollows Y2, 2nd sta
g
e
i
nte
g
rated or
mechan
i
cal cool
i
n
g
w
i
ll be enable
d
• Miswired or reverse wired thermostat
• Mi
s
wir
ed
ZIP E
co
n
o
miz
er
• Thermostat
f
a
i
lur
e
• W
i
re harness broken
N/A
SAT drop for
CC1 or CC2
i
nsu
ffi
c
i
en
t
S
AT sensor determined
t
h
at temperature
d
ownstream o
f
e
vaporator d
i
d not drop
b
y
at least 5°F a
f
ter 4
m
in of CC1 or CC2 bein
g
e
ner
gi
ze
d
• In
f
ormat
i
onal onl
y
- no act
i
on
• F
i
lters or co
i
ls are d
i
rt
y
or blocked –
i
nspect
• SAT sensor in a location where it is not mixed
-
perform temperature travers
e
• Indoor fan is ino
p
erable -
c
heck rela
y
, belt, motor, bearing
s
• Condenser fan is inoperable -
c
heck rela
y
, motor, head pressure control
•
C
ompressor is fault
y
(internal damage) -
ch
ec
k
amperage, pressures
• Contactor ener
g
izes but compressor is off on
i
nt
e
rn
a
l
/e
xt
e
rn
a
l
o
v
e
rl
oad
• Hi
g
h volta
g
e problem to compressor -
c
heck wirin
g
, phases, contacto
r
• Low on refri
g
erant - check char
g
e
N/A
Dam
p
er Pos
value m
i
ss
i
n
g
E
co
n
o
m
i
z
e
r
is
n
o
t
sens
i
n
g
f
eedback
f
rom
actuato
r
• Lo
gi
c recon
fig
ured to use setpo
i
nt as re
f
erence
f
or
i
tems de
p
endent on actual
p
os
i
t
i
on
(i
.e.
i
nte
g
rated cool
i
n
g)
• Damper stuck
f
ault detect
i
on capab
i
l
i
t
y
i
s
disab
l
ed
• Actuator w
i
res not properl
y
term
i
nated
• Actuator w
i
thout
f
eedback capab
i
l
i
t
y
use
d
• W
i
r
e
h
a
rn
ess
b
r
o
k
e
n
• A
c
t
ua
t
o
r
e
l
ec
tr
o
n
ic
fai
l
u
r
e
E
S
AT
s
h
ou
l
d
b
e
l
owe
r
W
hen damper is
g
reater
than 85% o
p
en, and in
f
ree coolin
g
, SAT sensor
d
eterm
i
ned that
temperature
i
s not w
i
th
i
n
10°F of OA
T
• In
f
ormat
i
onal onl
y
- no act
i
on
• Damper l
i
nka
g
e
f
a
i
lur
e
• Actuator clamp
/
interface between damper
is
n
o
t
secu
r
e
• Damper blades are not secured to damper
shaft properl
y
• Outside air dam
p
er and return dam
p
er do not
stro
k
e proper
ly
• Return damper does not closes t
i
ghtl
y
when
o
utdoor damper
i
s
f
ull ope
n
•
O
AT sensor is poorl
y
located
• SAT sensor is poorl
y
locate
d
B
Damper
i
s
stuc
k
Feedback s
i
gnal
i
s not
w
i
th
i
n range o
f
c
ommanded pos
i
t
i
on
• I
f
rotat
i
on
i
s less than 85%, then
i
ntegrated
cool
i
ng w
i
ll be d
i
sable
d
• Damper linkage failur
e
• Damper blocked w
i
th
f
ore
i
gn ob
j
ect
• Actuator l
i
m
i
t stop engage
d
• Damper rotat
i
on has not been scaled us
i
ng
E
conom
i
zer Acceptance Test
B,
C
, D, E
ZIP
Eco
n
o
m
i
z
er
F
ault Detection and Diagnostics
(
FDD
)
Tabl
e