Troubleshooting - Trane 4TWR3 Installer's Manual

15.2 Troubleshooting

SYSTEM FAULTS
REFRIGERANT CIRCUIT
Head Pressure Too High
Head Pressure Too Low
Suction Pressure Too High
Suction Pressure Too Low
Liquid Refrig. Floodback (TXV/EEV)
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 H - Heating
6200 Troup Highway
Tyler, TX 75707
www.trane.com
24
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C P P S P S
H P P S P S
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 S P S
H P P S P S
C
H
C
H
C
H
P - Primary Causes S - Secondary Causes
The manufacturer has a policy of continuous product and product data improvement
and it reserves the right to change design and specifications without notice.
Representative-only illustrations included in this document.
© 2011 Trane
P P S P S
P P S
S P S
S P S
S P P
S
P
P S S
P
P
P S S
P S S
P S S
S P S S
S P S
P P
P P
P
P
P
P
P S P P S S S
P S P P S S
S
S
P
P S S
*
- 3 Phase Only
S
P S
S S S S P
S S S P
S P P
S P
S P S S
S S
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
18-BC83D1-2
09/11