Checkout Procedure; Troubleshooting Chart - What To Check - Trane 2TWB0012-036AA Installer's Manual

Installer's Guide
After installation has been completed, it is recommended that the entire system be checked against the following list:
1. Refrigerant Line, Leak checked .................................. [ ]
2. Suction Lines and Fittings properly insulated ........... [ ]
3. Have all Refrigerant Lines been secured and
isolated properly? ........................................................ [ ]
4. Have passages through masonry been sealed?
If mortar is used, prevent mortar from coming
into direct contact with copper tubing ........................ [ ]
5. Verify tightness of all electrical connects ................... [ ]
6. Observe outdoor fan during on cycle for clearance
and smooth operation ................................................. [ ]
7. Indoor coil drain line drains freely. Pour water
into drain pan .............................................................. [ ]
TROUBLESHOOTING CHART — WHAT TO CHECK
SYSTEM FAULTS
REFRIGERANT CIRCUIT
Head Pressure Too High
Head Pressure Too Low
Suction Pressure Too High
Suction Pressure Too Low
Liquid Refrig. Floodback (TXV)
Liquid Refrig. Floodback
(Cap. Tube)
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
C - Cooling
Trane
www.trane.com

CHECKOUT PROCEDURE

C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C P P
H P P
C P S P S S S
H P S P S S S
C P P S
H P P S
C P S S S
H P S S S
C P S P S S S
H P S P S S S
C P P
H P P
C
H
C
H
C
H
H - Heating P - Primary Causes S - Secondary Causes
Literature Order Number
File Number
Supersedes
Stocking Location
Trane has a policy of continuous product and product data improvement and it reserves the right to change
design and specifications without notice.
8. Supply registers and return grilles open and
unobstructed ............................................................... [ ]
9. Return air filter installed ............................................ [ ]
10. Thermostat thermometer is accurate. Check
against a reliable thermometer. Adjust per
instructions with thermostat ...................................... [ ]
11. Is correct speed tap being used?
(Indoor blower motor) ................................................. [ ]
12. Operate complete system in each mode to
insure safe operation. .................................................. [ ]
P P S P S
P P S
S P
S P
S P P
S
P
P S S
P S S
P S S
P S S
S P S 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
P S P P S S
S P S S
S P S S
P
P S S
* - 3 Phase Only
S
P S
S S S S S P
S S S S P
S P P
S P
S P S S
S S
P P
P P
S P
S S
S P S S S S
S P S S S
S S
S P S
P P P
P
S P P
01/10