![background image](http://html1.mh-extra.com/html/daikin/dbg-series/dbg-series_service-instructions-manual_3242735022.webp)
22
DBC***XXX**XXX
Complaint
System
Operating
Pressures
POSSIBLE CAUSE
DOTS IN ANALYSIS
GUIDE INDICATE
"POSSIBLE CAUSE"
SYM
PT
O
M
Sy
st
em
w
ill not
s
tar
t
C
om
pr
es
sor
w
ill not
s
tar
t -
fan r
uns
C
om
p.
and C
ond.
F
an w
ill not
s
tar
t
Ev
apor
at
or
fan w
ill not
s
tar
t
C
ondens
er
fan w
ill not
s
tar
t
C
om
pr
es
sor
runs
- goes
of
f on ov
er
load
C
om
pr
es
sor
c
yc
les
on ov
er
load
Sy
st
em
runs
c
ont
inuous
ly
- l
itt
le
cool
ing
Too c
ool
and t
hen t
oo w
ar
m
N
ot
c
ool
enough on w
ar
m
day
s
C
er
tai
n ar
eas
too c
ool
, ot
her
s
too w
ar
m
C
om
pr
es
sor
is
noi
sy
Low
s
uc
tion pr
es
sur
e
H
igh s
uc
tion pr
es
sur
e
H
igh head pr
es
sur
e
Test Method
Remedy
See S
er
vi
ce P
ro
ced
ur
e R
ef
.
Power Failure
•
Test Voltage
S-1
Blown Fuse
•
• •
Inspect Fuse Size & Type
S-1
Unbalanced Power, 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 with 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
Faulty Fan Relay
•
Test Continuity of Coil And Contacts
S-7
Open Control Circuit
•
Test Control Circuit with Voltmeter
S-4
Low Voltage
•
• •
Test Voltage
S-1
Faulty Evap. Fan Motor
•
•
Repair or Replace
S-16
Shorted or Grounded Fan Motor
•
•
Test Motor Windings
S-16
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
Dirty Air Filter
•
• •
•
Inspect Filter-Clean or Replace
Dirty Indoor Coil
•
• •
•
Inspect Coil - Clean
Insufficient air across Indoor Coil
•
• •
•
Check Blower Speed and Rotation, Belt, Pulleys,
Duct Static, Filter
S-200,205,
206, 207
Too much air across Indoor Coil
•
Reduce Blower Speed, Check Pulley Adjustment
S-205, 207
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 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
S-115
Broken Valves
•
•
•
Test Compressor Efficiency
S-104
Inefficient Compressor
•
•
Test Compressor Efficiency
S-104
Expansion Device Restricted
• • •
•
•
•
Remove Restriction, Replace Expansion Device
111
Loose Hold-down Bolts
•
Tighten Bolts
Flowrator Not Seating Properly
•
•
Check Flowrator & Seat or Replace Flowrator
S-111
•
No Cooling
Cooling Cycle
COOLING ANALYSIS CHART
Unsatisfactory
Cooling
Содержание DBG Series
Страница 51: ...51 ACCESSORIES GAS ELECTRIC...
Страница 52: ...ACCESSORIES 52 GAS ELECTRIC...
Страница 53: ...53 ACCESSORIES...
Страница 54: ...ACCESSORIES 54...
Страница 95: ...95 DBC COMMERCIAL 15 25 Ton Packaged Air Conditioner Unit WIRING DIAGRAMS...
Страница 100: ...100 DBG COMMERCIAL 15 25 Ton Packaged Gas Electric Unit WIRING DIAGRAMS...