Goodman ComfortNet DSXC160241AC, Service Instructions Manual

Page: 34 / 108

34
TROUBLESHOOTING CHART
Com plain t
Sys te m
Op e r atin g
Pr e s s ur e s
P OSS IBLE CAUSE
DOTS IN ANALYSIS
GUIDE INDICATE
"P OSS IBLE CAUSE"
SY
M
P
T
O
M
S
y
s
tem
w
ill
not s
tar
t
C
o
m
p
re
s
s
o
r
w
ill n
o
t s
ta
rt
-
f
a
n
r
u
n
s
C
o
m
p
.
and C
o
nd.
F
an w
ill n
o
t
s
ta
rt
Ev
a
p
o
ra
to
r f
a
n
w
ill
n
o
t
s
ta
rt
C
ondens
er
fan w
ill n
o
t s
ta
rt
C
o
m
p
re
s
s
o
r
runs
-
goes
of
f on
ov
er
lo
ad
C
o
m
p
re
sso
r cycl
e
s
o
n
o
v
e
rl
o
a
d
S
y
s
tem
r
u
ns
c
onti
nuous
ly
-
l
itt
le
c
ool
ing/
htg
T
oo
c
ool
and t
hen t
oo w
a
rm
N
o
t c
ool
enough
on w
a
rm
day
s
C
e
rt
ai
n
ar
eas
too c
ool
, othe
rs
t
oo
w
a
rm
C
o
m
p
re
sso
r i
s
n
o
isy
S
y
s
tem
r
u
ns
-
bl
ow
s
c
o
ld
a
ir
in
heati
n
g
U
n
it w
ill n
o
t t
e
rm
in
a
te
d
e
fr
o
s
t
U
n
it w
ill n
o
t d
e
fr
o
s
t
Low
s
u
c
tion pr
es
s
u
re
Low
head
pr
es
s
u
re
H
igh s
u
c
tion pr
es
s
u
re
H
igh head
pr
es
s
u
re
Te st Me thod
Re m e dy
S
e
e
S
e
rv
ic
e
P
roc
e
dure
R
e
f.
Pow er Failure
•
Tes t V oltage S-1
Blow n Fus e
• • •
Inspect Fus e Siz e & Ty pe S-1
Loose Connection
• • •
Inspect Connection - Tighten S-2, S-3
Shorted or Broken Wires
• • • • • •
Tes t Circuits With Ohmmeter S-2, S-3
Open Fan Ov erload
• •
Tes t Continuity of Ov erload S-17A
Faulty Thermos tat
• • • •
Tes t Continuity of Thermos tat & Wiring S-3
Faulty Trans f ormer
• •
Chec k Control Circ uit w ith V oltmeter S-4
Shorted or Open Capac itor
• • • • •
Tes t Capac itor S-15
Internal Compres sor Ov erload Open
• ♦
Tes t Continuity of Ov erload S-17A
Shorted or Grounded Compress or
• •
Tes t Motor Windings S-17B
Compres s or Stuck
• • •
♦
Use Tes t Cord S-17D
Faulty Compres s or Contac tor
• • •
Tes t Continuity of Coil & Contac ts S-7, S-8
Faulty Fan Relay
•
Tes t Continuity of Coil A nd Contac ts S-7
Open Control Circuit
•
Tes t Control Circ uit w ith V oltmeter S-4
Low V oltage
• • •
Tes t V oltage S-1
Faulty Ev ap. Fan Motor
• • ♦
Repair or Replac e S-16
Shorted or Grounded Fan Motor
• •
Tes t Motor Windings S-16
Improper Cooling A ntic ipator
• •
Chec k Res istanc e of A ntic ipator S-3B
Shortage of Ref rigerant
• •
♦
• •
Tes t For Leaks , A dd Ref rigerant S-101,103
Res tric ted Liquid Line
• • • • •
Remov e Restriction, Replac e Res tric ted Part S-112
Open Element or Limit on Elec . Heater
♦ ♦
Tes t Heater Element and Controls S-26,S-27
Dirty A ir Filter
• • • • ♦
Inspect Filter-Clean or Replace
Dirty Indoor Coil
• • • •
♦
Inspect Coil - Clean
Not enough air across Indoor Coil
• • • •
♦
Chec k Blow er Speed, Duc t Static Press , Filter S-200
Too much air ac ros s Indoor Coil
♦
•
Reduce Blow er Speed S-200
Ov erc harge of Ref rigerant
• • •
♦
• •
Rec over Part of Charge S-113
Dirty Outdoor Coil
• • • ♦ •
Inspect Coil - Clean
Noncondens ibles
• • ♦ •
Rec over Charge, Ev acuate, Recharge S-114
Rec irc ulation of Condens ing A ir
• • •
Remov e Obstruc tion to A ir Flow
Inf iltration of Outdoor A ir
• • •
Chec k Window s, Doors , V ent Fans, Etc .
Improperly Located Thermos tat
• •
Relocate Thermos tat
A ir Flow Unbalanced
• •
Readjus t A ir V olume Dampers
Sy s tem Unders iz ed
• •
Ref igure Cooling Load
Broken Internal Parts
• ♦
Replac e Compres sor S-115
Broken V alv es
• • • •
Tes t Compres s or Ef f icienc y S-104
Inef f ic ient Compres sor
•
♦
• •
Tes t Compres s or Ef f icienc y S-104
Wrong Ty pe Ex pans ion V alv e
• • • • • •
♦
Replac e V alv e S-110
Ex pans ion Devic e Res tric ted
• • • • • • •
Remov e Restriction or Replac e Ex pansion Dev ice S-110
Ov ers ized Ex pansion V alv e
• •
Replac e V alv e
Unders iz ed Expans ion V alve
• • • • •
Replac e V alv e
Ex pans ion V alv e Bulb Loose
• •
Tighten Bulb Brac ket S-105
Inoperativ e Expans ion V alve
• • •
Chec k V alv e Operation S-110
Loose Hold-dow n Bolts
•
Tighten Bolts
Faulty Rev ers ing V alv e
•
♦ ♦ ♦ ♦ ♦ ♦
Replac e V alv e or Solenoid S-21, 122
Faulty Def ros t Control
• ♦ ♦ ♦ ♦ ♦ ♦
Tes t Control S-24
Faulty Def ros t Thermos tat
♦ ♦ ♦ ♦ ♦ ♦ ♦
Tes t Def ros t Thermostat S-25
Flow rator Not Seating Properly
• • •
Chec k Flow rator & Seat or Replac e Flow rator S-111
•
Co oling or He ating Cycle (He at Pu m p )
♦
C OOLIN G/H P AN ALYSIS C H AR T
No Coo lin g
Un s atis factor y
Co o lin g/He atin g
He atin g Cycle Only (He at Pum p)