18-BC51D1-4
5
Installer’s Guide
I. ELECTRIC HEATERS
Electric heaters, if used, are to be installed in the air han-
dling device according to the instructions accompanying the
air handler and the heaters.
J. START CONTROL
Some models have quick start components which are
factory installed. For models that do not have factory
installed start components, provisions are made for a field
installed start kit accessory. When adding an accessory,
follow the instructions provided with the kit.
K. OUTDOOR THERMOSTAT
An outdoor thermostat TAYSTAT250B may be field installed.
For data, see wiring diagram attached to unit and instruc-
tion sheet packaged with outdoor thermostat.
L. SEACOAST SALT SHIELD
Units installed within one mile of salt water including
seacoasts and inland waterways, require the addition of
BAYSEAC001 (Seacoast Kit) at the time of installation.
IMPORTANT:
See Limited Warranty information in Use and Care Manual.
SYSTEM FAULTS
REFRIGERANT CIRCUIT
Head Pressure Too High
Head Pressure Too Low
Suction Pressure Too High
Suction Pressure Too Low
Liquid Refrig. Floodback (TXV)
I.D. Coil Frosting
Compressor Runs
Inadequate or No Cooling/Htg
ELECTRICAL
Compressor & O.D. Fan
Won’t Start
Compressor Will Not Start
But O.D. Fan Runs
O.D. Fan Won’t Start
Compressor Hums But Won’t Start
Compressor Cycles on IOL
I.D. Blower Won’t Start
DEFROST
Unit Won’t Initiate Defrost
Defrost Terminates on Time
Unit Icing Up
WHA
T
TO
CHECK MODE
PO
WER SUPPL
Y
HIGH V
O
LTA
GE
WIRING
COMPRESSOR IOL
RUN CAP
ACIT
OR
ST
AR
T CAP
AC
IT
OR
ST
AR
T RELA
Y
CONT
AC
TOR CONT
ACTS
LO
W V
O
LTA
GE
WIRING
CONTR
OL TRANSFORMER
THERMOST
AT
CONT
AC
TOR COIL
LO
W V
O
LTA
GE
FUSE
STUCK COMPRESSOR
INEFFICIENT COMP
.
REF
. UNDERCHARGE
REF
. O
VERCHARGE
EXCESSIVE EV
AP
. LO
AD
NONCONDENSABLES
RES
. O
.D
. AIRFLO
W
O
.D
. AIR RECIRCULA
TION
TXV STUCK OPEN
SUPERHEA
T
RES
. I.D
. AIRFLO
W
REF
. CIR.
RESTRICTIONS
SO
V LEAKING
SO
V COIL DEFECTIVE
CHECK V
AL
VE
LEAKING
*
DEFR
OST RELA
Y DEF
.
DEFR
OST CONTR
OL DEF
.
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
P
P
P
P
P
P
P
P
P
P
P
P
P
P
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
P
P
P
P
S
S
S
S
P
P
P
P
S
S
P
P
P
P
P
P
P
P
P
P
P
P
P
P
S
S
S
S
S
S
S
S
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
S
S
S
S
S
S
S
P
S
S
S
S
S
S
S
S
S
S
S
S
P
P
S
S
S
S
S
S
S
S
S
S
P
P
P
P
P
S
S
S
S
S
S
S
S
S
S
S
P
P
S
S
S
S
S
S
S
P
P
P
P
P
P
P
S
S
P
P
P
P
C - Cooling H - Heating P - Primary Causes S - Secondary Causes
*
- 3 Phase Only
TROUBLESHOOTING CHART — WHAT TO CHECK
M. TROUBLESHOOTING
TYPICAL FIELD HOOK-UP DIAGRAMS
Notes:
1. Be sure power supply agrees with equipment nameplate.
2. Power wiring and grounding of equipment must comply with local codes.
3. Low voltage wiring to be No. 18 AWG minimum conductor.
4. ODT-B must be set lower than ODT-A.
5. If outdoor thermostats (ODT) are not used, connect W1 to W2 and W3.
6. N/A to programmable thermostat.
LEGEND
FACTORY WIRING
FIELD WIRING
