47
WARNING
!
COOLING TROUBLE SHOOTING CHART
DISCONNECT ALL POWER TO UNIT BEFORE SERVICING. CONTACTOR MAY BREAK ONLY ONE SIDE. FAIL-
URE TO SHUT OFF POWER CAN CAUSE ELECTRICAL SHOCK RESULTING IN PERSONAL INJURY OR DEATH.
SYMPTOM
POSSIBLE CAUSE
REMEDY
Unit will not run
• Power off or loose electric
a
l connection
•
Check for correct volt
a
ge
a
t compressor cont
a
ctor in control
box
• Thermost
a
t out of c
a
libr
a
tion-set too high
•
Reset
• F
a
iled cont
a
ctor
•
Check for 24 volts
a
t cont
a
ctor coil - repl
a
ce if cont
a
cts
a
re
open
• Blown fuses
•
Determine c
a
use, remedy,
a
nd repl
a
ce fuses
• Tr
a
nsformer defective
•
Check wiring-repl
a
ce tr
a
nsformer
• High pressure control open (if provided)
•
Reset-
a
lso see high he
a
d pressure remedy-The high pressure
control opens
a
t 450 P
S
IG
• Interconnecting low volt
a
ge wiring d
a
m
a
ged
•
Repl
a
ce thermost
a
t wiring
Condenser f
a
n runs, compressor
• Run or st
a
rt c
a
p
a
citor f
a
iled (single ph
a
se only)
•
Repl
a
ce
doesn’t
•
S
t
a
rt rel
a
y defective 9single ph
a
se only)
•
Repl
a
ce
• Loose connection
•
Check for correct volt
a
ge
a
t compressor -
check & tighten
a
ll connections
• Compressor stuck, grounded or open motor winding
•
W
a
it
a
t le
a
st 2 hours for overlo
a
d to reset.
open intern
a
l overlo
a
d.
If still open, repl
a
ce the compressor.
• Low volt
a
ge condition
At compressor termin
a
ls, volt
a
ge must be within 10% of r
a
ting
pl
a
te volts when unit is oper
a
ting.
• Low volt
a
ge condition
•
Add st
a
rt kit components
Insufficient cooling
• Improperly sized unit
•
Rec
a
lcul
a
te lo
a
d
• Improper
a
irflow
•
Check - should be
a
pproxim
a
tely 400 CFM per ton.
• Incorrect refriger
a
nt ch
a
rge
•
Ch
a
rge per procedure
a
tt
a
ched to unit service p
a
nel.
• Air, non-condensibles or moisture in system
•
Recover refriger
a
nt, ev
a
cu
a
te & rech
a
rge,
a
dd filter drier
• Incorrect volt
a
ge
•
At compressor termin
a
ls, volt
a
ge must be within 10% of r
a
ting
pl
a
te volts when unit is oper
a
ting.
Compressor short cycles
• Incorrect volt
a
ge
•
At compressor termin
a
ls, volt
a
ge must be ± 10% of
n
a
mepl
a
te m
a
rking when unit is oper
a
ting.
• Defective overlo
a
d protector
•
Repl
a
ce - check for correct volt
a
ge
• Refriger
a
nt underch
a
rge
•
Add refriger
a
nt
Registers swe
a
t
• Low ev
a
por
a
tor
a
irflow
•
Incre
a
se speed of blower or reduce restriction - repl
a
ce
a
ir
filter
High he
a
d-low v
a
por pressures
• Restriction in liquid line, exp
a
nsion device or filter drier
•
Remove or repl
a
ce defective component
• Flow check piston size too sm
a
ll
•
Ch
a
nge to correct size piston
• Incorrect c
a
pill
a
ry tubes
•
Ch
a
nge coil
a
ssembly
• TXV does not open
•
Repl
a
ce TXV
High he
a
d-high or norm
a
l v
a
por
• Dirty condenser coil
•
Cle
a
n coil
pressure - Cooling mode
• Refriger
a
nt overch
a
rge
•
Correct system ch
a
rge
• Condenser f
a
n not running
•
Rep
a
ir or repl
a
ce
• Air or non-condensibles in system
•
Recover refriger
a
nt, ev
a
cu
a
te & rech
a
rge
Low he
a
d-high v
a
por pressures
• Defective Compressor v
a
lves
•
Repl
a
ce compressor
• Incorrect c
a
pill
a
ry tubes
•
Repl
a
ce coil
a
ssembly
Low v
a
por - cool compressor -
• Low ev
a
por
a
tor
a
irflow
•
Incre
a
se speed of blower or reduce restriction - repl
a
ce
a
ir
iced ev
a
por
a
tor coil
filter
• Oper
a
ting below 65°F outdoors
•
Add Low Ambient Kit
• Moisture in system
•
Recover refriger
a
nt - ev
a
cu
a
te & rech
a
rge -
a
dd filter drier
High v
a
por pressure
• Excessive lo
a
d
•
Recheck lo
a
d c
a
lcul
a
tion
• Defective compressor
•
Repl
a
ce
Fluctu
a
ting he
a
d & v
a
por
• TXV hunting
•
Check TXV bulb cl
a
mp - check
a
ir distribution on coil - repl
a
ce
pressures
TXV
• Air or non-condensibles in system
•
Recover refriger
a
nt, ev
a
cu
a
te & rech
a
rge
Gurgle or pulsing noise
a
t
• Air or non-condensibles in system
•
Recover refriger
a
nt, ev
a
cu
a
te & rech
a
rge
exp
a
nsion device or liquid line
Circul
a
ting
a
ir blower & inducer
• M
a
nu
a
l reset overtemper
a
ture control
•
Reset or repl
a
ce
run continuously,
• tripped
compressor will not st
a
rt
• Wire loose in limit circuit
•
Check wiring
Содержание TGC Series
Страница 5: ...5 FIGURE 3 CABINET DIMENSIONS AND ACCESS LOCATIONS FIGURE 4 SUPPLY AND RETURN DIMENSIONS I282 I288...
Страница 24: ...24 FIGURE 20 FIGURE 21 INTEGRATED FURNACE CONTROL SPEED TAP BLOCK FIGURE 22...
Страница 25: ...25 FIGURE 22 Continued...
Страница 37: ...37 FIGURE 23 WIRING DIAGRAM...
Страница 38: ...38 FIGURE 24 WIRING DIAGRAM...
Страница 39: ...39 FIGURE 25 WIRING DIAGRAM...
Страница 40: ...40 FIGURE 26 WIRING DIAGRAM...
Страница 41: ...41 FIGURE 27 WIRING DIAGRAM...
Страница 42: ...42 FIGURE 28 WIRING DIAGRAM...
Страница 43: ...43 FIGURE 29 SYSTEM CHARGE CHARTS 3 TON COOLING 13 SEER...
Страница 44: ...44 FIGURE 30 SYSTEM CHARGE CHARTS 3 5 TON COOLING 13 SEER...
Страница 45: ...45 FIGURE 31 SYSTEM CHARGE CHARTS 4 TON COOLING 13 SEER...
Страница 46: ...46 FIGURE 32 SYSTEM CHARGE CHARTS 5 TON COOLING 13 SEER...
Страница 50: ...50...
Страница 51: ...51...
Страница 52: ...52 CM 1206...
