Goodman Mfg R-410A - Manual (Page 21)

SERVICING
21
COOLING /HEAT PUMP- SERVICE ANALYSIS GUIDE
SERVICING
POSSIBLE CAUSE
DOTS IN ANALYSIS GUIDE
INDICATE SYMPTOM
"POSSIBLE CAUSE"
S
yst
e
m
w
ill
n
o
t sta
rt
C
o
m
p
re
ss
o
r w
ill n
o
t s
ta
rt
-
fa
n
r
u
n
s
C
o
m
p
.
and C
ond.
F
an w
ill
not
s
tart
E
vapor
at
or f
an w
ill
not
s
tart
C
ondens
er
f
an w
ill not
s
tar
t
C
o
m
p
res
sor r
uns
-
goes
of
f
on ov
er
load
C
o
m
p
res
sor c
yc
le
s
on ov
erl
oad
S
ys
tem
runs
c
ont
inuous
ly
- l
itt
le
c
ool
ing/
ht
g
T
oo
cool
and t
hen t
oo w
a
rm
N
o
t c
ool
enou
gh
on w
a
rm
day
s
C
e
rt
ai
n
ar
eas
t
oo c
ool
, ot
her
s
too
w
a
rm
C
o
m
p
re
sso
r i
s
n
o
isy
S
ys
tem
runs
-
b
lo
w
s c
o
ld
ai
r i
n
heat
ing
U
n
it w
ill
not
t
e
rm
inat
e def
ros
t
U
n
it w
ill n
o
t d
e
fr
o
st
Low
s
u
ct
ion
pres
su
re
Low
head
pres
su
re
H
igh s
u
ct
ion
pres
su
re
H
igh head pres
su
re
Pow er Failure
•
Test Voltage S-1
Blow n Fuse
• •
Inspect Fuse Size & Type S-1
Unbalanced Pow er, 3PH
• • •
Test Voltage S-1
Loose Connection
• • •
Inspect Connection - Tighten S-2, S-3
Shorted or Broken Wires
• • • • • •
Test Circuits With Ohmmeter S-2, S-3
Open Fan Overload
• •
Test Continuity of Overload S-17A
Faulty Thermostat
• • • •
Test continuity of Thermostat & Wiring S-3
Faulty Transformer
• •
Check control circuit w ith voltmeter S-4
Shorted or Open Capacitor
• • • •
Test Capacitor S-15
Internal Compressor Overload Open
• ♦
Test Continuity of Overload S-17A
Shorted or Grounded Compressor
• •
Test Motor Windings S-17B
Compressor Stuck
• • • ♦
Use Test Cord S-17D
Faulty Compressor Contactor
• • •
Test continuity of Coil & Contacts S-7, S-8
Compressor High Stage Not Working
• • ♦
Test Voltage to Unloader Plug, Test Plug S-17C
Open Control Circuit
•
Test Control Circuit w ith Voltmeter S-4, S-11, S-12
Low Voltage
• • •
Test Voltage S-1
Faulty Evap. Fan Motor
• • ♦
Repair or Replace S-16
Shorted or Grounded Fan Motor
• •
Test Motor Windings S-16A,D
Improper Cooling Anticipator
• •
Check resistance of Anticipator S-3B
Shortage of Refrigerant
• • ♦ • •
Test For Leaks, Add Refrigerant S-101,103
Restricted Liquid Line
• • • • •
Remove Restriction, Replace Restricted Part S-112
Open Element or Limit on Elec. Heater ♦ ♦ Test Heater Element and Controls S-26,S-27
Dirty Air Filter
• • • • ♦
Inspect Filter-Clean or Replace
Dirty Indoor Coil
• • • • ♦
Inspect Coil - Clean
Not enough air across Indoor Coil
• • • • ♦
Check Blow er Speed, Duct Static Press, Filter S-200
Too much air across Indoor Coil
• ♦ •
Reduce Blow er Speed S-200
Overcharge of Refrigerant
• • • ♦ • •
Recover Part of Charge S-113
Dirty Outdoor Coil
• • • ♦ •
Inspect Coil - Clean
Noncondensibles
• • ♦ •
Recover Charge, Evacuate, Recharge S-114
Recirculation of Condensing Air
• • •
Remove Obstruction to Air Flow
Infiltration of Outdoor Air
• • •
Check Window s, Doors, Vent Fans, Etc.
Improperly Located Thermostat
• •
Relocate Thermostat
Air Flow Unbalanced
• •
Readjust Air Volume Dampers
System Undersized
• •
Refigure Cooling Load
Broken Internal Parts
• ♦
Replace Compressor S-115
Broken Valves
• • • •
Test Compressor Efficiency S-104
Inefficient Compressor
• ♦ • •
Test Compressor Efficiency S-104
Loose Hold-dow n Bolts
•
Tighten Bolts
Faulty Reversing Valve
• ♦ ♦ ♦ ♦ ♦ ♦
Replace Valve or Solenoid S-21, 122
Faulty Defrost Control
• ♦ ♦ ♦ ♦ ♦ ♦
Test Control S-24
Faulty Defrost Thermostat ♦ ♦ ♦ ♦ ♦ ♦ ♦ Test Defrost Thermostat S-25
Flow rator Not Seating Properly
• • •
Check Flow rator & Seat or Replace Flow rator S-111
•
Cooling or Heating Cycle (Heat Pump) ♦ Heating Cycle Only (Heat Pump)
Test Method Remedy
S
ee S
er
vi
ce P
ro
ced
ur
e R
e
f.
Complaint No Cooling Unsatisfactory Cooling/Heating
System Operating
Pressures