Troubleshooting - Trane 2TWR3 Installer's Manual

page 8. To obtain proper performance, all units must be
operated and charge adjustments made in accordance with
procedures found in the Service Facts.
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 instruction
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.
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.
18-BC59D1-1
TYPICAL FIELD HOOK-UP DIAGRAMS
Installer's Guide
M. TROUBLESHOOTING
TROUBLESHOOTING CHART — WHAT TO CHECK
SYSTEM FAULTS
REFRIGERANT CIRCUIT
C
Head Pressure Too High
H
C
Head Pressure Too Low
H
C
Suction Pressure Too High
H
C
Suction Pressure Too Low
H
C
Liquid Refrig. Floodback (TXV)
H
C
I.D. Coil Frosting
H
Compressor Runs C
Inadequate or No Cooling/Htg
H
ELECTRICAL
C P P
Compressor & O.D. Fan
Won't Start H P P
C P S P S S S
Compressor Will Not Start
But O.D. Fan Runs
H P S P S S S
C P P S
O.D. Fan Won't Start
H P P S
C P S S S
Compressor Hums But Won't Start
H P S S S
C P S P S S S
Compressor Cycles on IOL
H P S P S S S
C P P
I.D. Blower Won't Start
H P P
DEFROST
C
Unit Won't Initiate Defrost
H
C
Defrost Terminates on Time
H
C
Unit Icing Up
H
C - Cooling H - Heating P - Primary Causes
P P S P S S
P P S P S
S P S S S
S P S S S
S P P S
S S
P S P S
P S S S S
P
P
P S S
S P S S S P S
S P S S P S
S P S P P
S P S P P
P
P
P
P
P S P P S S S S
P S P P S S S P
S P S S
S P S S
P
P S S S
S - Secondary Causes * - 3 Phase Only
LEGEND
FACTORY WIRING
FIELD WIRING
S S P
S P
P P
P
S
P
P
S S S
S S
S
S
P P P
P
P P
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