Amana PTAC 24", Service Instructions Manual, Page: 48 / 74

48
Com plaint
POSSIBLE CAUSE
DOTS IN ANALYSIS
GUIDE INDICATE
"POSSIBLE CAUSE"
SYM
PT
O
M
S
yst
em
W
ill N
o
t S
tar
t
C
o
m
p
resso
r w
ill n
o
t st
ar
t -
f
an
r
u
n
s
C
o
m
p
resso
r an
d
C
o
n
d
en
ser
F
an
w
ill n
o
t st
ar
t
E
vap
o
rat
o
r f
an
w
ill n
o
t st
ar
t
C
o
n
d
en
ser
f
an
w
ill n
o
t st
ar
t
C
o
m
p
resso
r r
u
n
s -
g
o
es o
ff
o
n
o
ver
lo
ad
C
o
m
p
resso
r cycles
o
n
o
ver
lo
ad
S
ys
te
m
r
uns
c
onti
n
u
ous
ly
- l
ittl
e c
ool
in
g
To
o c
ool
a
nd the
n
t
oo w
ar
m
N
o
t c
ool
e
nough on
w
ar
m
da
ys
C
er
tain
ar
eas t
o
o
co
o
l o
th
er
s, t
o
o
w
ar
m
C
o
m
p
resso
r is n
o
isy
L
o
w
su
ct
io
n
p
ressu
re
L
o
w
h
ead
p
ressu
re
H
ig
h
S
u
ct
io
n
P
ressu
re
H
ig
h
h
ead
p
ressu
re
Pow er Failure
•
Test Voltage S-1
Blow n Fuse
• • •
Im pact Fuse Size & Type
Loose Connection
• • •
Inspect Connection - Tighten S-2
Shorted or Broken Wires
• • • • • •
Test Circuits With Ohm m eter S-3
Open Overload
• • • •
Test Continuity of Overloads S-17A
Faulty Therm ostat
• • •
Test Continuity of Therm ostat & Wiring S-3
Shorted or Open Capacitor
• • •
Test Capacitor S-15
Internal Overload Open
•
Test Continuity of Overload S-6
Shorted or Grounded Com pressor
• •
Test Motor Windings S-17
Com pressor Stuck
• •
Use Test Cord S-17
Open Control Circuit
•
Test Control Circuit w ith Voltm eter S-1
Low Voltage
• • •
Test Voltage S-1
Faulty Evap or Cond. Fan Motor
• •
Repair or Replace S-16
Shorted or Grounded Fan Motor
• •
Test Motor Windings S-16
Shortage or Refrigerant
• • • •
Test for Leaks, Replace Drier S-1, S-2
Restructed Liquid Line
• • • •
Replace Restricted Part
Dirty Air Filter
• • • • •
Inspect Filter - Clean or Replace
Dirty Indoor Coil
• • • • •
Inspect Coil - Clean
Airflow Across Coils
•
Check Motor Operation
Overcharge of Refrigerant
• • • •
Recover & Replace Cap Tube S-116
Dirty Outdoor Coil
• • • •
Inspect Coil - Clean
Noncondensibles
• • •
Rem ove Charge, Replace Cap Tube S-1, S-2
Recirculation of Condensing Air
• • •
Rem ove Obstruction to Air Flow
Infiltration of Outdoor Air
• • •
Check Window s, Doors, Vent Fans, etc.
Im properly Located Therm ostat
• •
Relocate Therm ostat
System Undersized
• •
Refigure Cooling Load
Broken Internal Parts
•
Replace Com pressor S-17
Broken Values
•
Test Com pressor Efficiency S-104
Inefficient Com pressor
• • •
Test Com pressor Efficiency S-104
No Heat
Unsatisfactory
Cooling
System
Operating
Pressures
Test Method
Remedy
S
ee S
er
vi
ce P
ro
ced
u
re R
ef
er
en
ce
ANALYSIS CHART