Goodman CONDENSING UNIT, Инструкция по установке и обслуживанию

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10
Troubleshooting Information
For detailed service information refer to the Remote Condensing Unit Service manual.
Complaint
System
Operating
Pressures
POSSIBLE CAUSE
DOTS IN ANALYSIS
GUIDE INDICATE
"POSSIBLE CAUSE"
SY
MP
TO
M
S
y
s
tem
wi
ll not
s
ta
rt
C
o
m
p
re
s
s
o
r w
ill n
o
t s
ta
rt
- fa
n
ru
n
s
Co
mp
.
a
n
d
Co
nd
. Fa
n wi
ll no
t st
a
rt
Eva
p
o
rat
or
f
a
n wi
ll no
t
s
ta
rt
C
ond
en
s
e
r f
a
n wi
ll not
s
ta
rt
C
o
m
p
re
s
s
o
r r
u
n
s
-
go
es
of
f on
o
v
er
lo
ad
Co
m
p
re
sso
r cycl
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s
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ove
rl
o
a
d
S
y
s
tem
r
u
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s
c
o
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ti
n
u
ous
ly
-
l
it
tl
e c
o
o
lin
g/
ht
g
T
o
o
c
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ol
an
d
th
en
t
o
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w
a
rm
N
o
t
c
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ol
en
oug
h on
w
a
rm
da
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s
C
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ai
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rea
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c
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,
ot
her
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t
oo
wa
rm
C
o
m
p
re
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r is
n
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is
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y
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tem
r
u
n
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-
bl
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w
s
c
o
ld
ai
r i
n
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eat
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g
Un
it
w
ill
n
o
t t
e
rm
in
at
e
de
fr
o
s
t
U
n
it
wi
ll not
def
ro
s
t
Lo
w
su
cti
o
n
p
re
ssur
e
L
o
w he
ad
p
res
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re
H
igh
s
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c
ti
on
pr
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re
H
igh
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a
d
pr
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re
Test Method
Remedy
Power Failure
•
Test Voltage
Blown Fuse
• • •
Inspect Fuse Size & Type
Unbalanced Power, 3PH
• • •
Test Voltage
Loose Connection
• • •
Inspect Connection - Tighten
Shorted or Broken Wires
• • • • • •
Test Circuits With Ohmmeter
Open Fan Overload
• •
Test Continuity of Overload
Faulty Thermostat
• • • •
Test Continuity of Thermostat & Wiring
Faulty Transformer
• •
Check Control Circuit with Voltmeter
Shorted or Open Capacitor
• • • • •
Test Capacitor
Internal Compressor Overload Open
•
♦
Test Continuity of Overload
Shorted or Grounded Compressor
• •
Test Motor Windings
Compressor Stuck
• • •
♦
Use Test Cord
Faulty Compressor Contactor
• • •
Test Continuity of Coil & Contacts
Faulty Fan Relay
•
Test Continuity of Coil And Contacts
Open Control Circuit
•
Test Control Circuit with Voltmeter
Low Voltage
• • •
Test Voltage
Faulty Evap. Fan Motor
• •
♦
Repair or Replace
Shorted or Grounded Fan Motor
• •
Test Motor Windings
Improper Cooling Anticipator
• •
Check Resistance of Anticipator
Shortage of Refrigerant
• •
♦
• •
Test For Leaks, Add Refrigerant
Restricted Liquid Line
• • • • •
Remove Restriction, Replace Restricted Part
Open Element or Limit on Elec. Heater
♦ ♦
Test Heater Element and Controls
Dirty Air Filter
• • • •
♦
Inspect Filter-Clean or Replace
Dirty Indoor Coil
• • • •
♦
Inspect Coil - Clean
Not enough air across Indoor Coil
• • • •
♦
Check Blower Speed, Duct Static Press, Filter
Too much air across Indoor Coil
♦ •
Reduce Blower Speed
Overcharge of Refrigerant
• • •
♦
• •
Recover Part of Charge
Dirty Outdoor Coil
• • •
♦
•
Inspect Coil - Clean
Noncondensibles
• •
♦
•
Recover Charge, Evacuate, Recharge
Recirculation of Condensing Air
• • •
Remove Obstruction to Air Flow
Infiltration of Outdoor Air
• • •
Check Windows, 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
Broken Valves
• • • •
Test Compressor Efficiency
Inefficient Compressor
•
♦
• •
Test Compressor Efficiency
Wrong Type Expansion Valve
• • • • • •
♦
Replace Valve
Expansion Device Restricted
• • • • • • •
Remove Restriction or Replace Expansion Device
Oversized Expansion Valve
• •
Replace Valve
Undersized Expansion Valve
• • • • •
Replace Valve
Expansion Valve Bulb Loose
• •
Tighten Bulb Bracket
Inoperative Expansion Valve
• • •
Check Valve Operation
Loose Hold-down Bolts
•
Tighten Bolts
Faulty Reversing Valve
•
♦ ♦ ♦ ♦ ♦ ♦
Replace Valve or Solenoid
Faulty Defrost Control
•
♦ ♦ ♦ ♦ ♦ ♦
Test Control
Faulty Defrost Thermostat
♦ ♦ ♦ ♦ ♦ ♦ ♦
Test Defrost Thermostat
Flowrator Not Seating Properly
• • •
Check Flowrator & Seat or Replace Flowrator
•
Cooling or Heating Cycle (Heat Pump)
♦
No Cooling Unsatisfactory Cooling/Heating
Heating Cycle Only (Heat Pump)
NOTICE
UNITS WITH ROTARY OR RECIPROCATING COMPRESSORS AND NON-BLEED
TXV’S REQUIRE A HARD START KIT.