Trane 25 Series Installer Manual page 44

25 Series Single Zone
Error Codes
H5
IPM Module Protection
H6
Indoor DC Fan Motor Malfunction
Compressor De-Synchronized
H7
Malfunction
L3
Outdoor Fan Motor Malfunction
Mismatched Indoor and Outdoor
LP
Units
P8
Module Temperature Protection
U4
Reversing Valve Malfunction
If other error codes are present, contact your dealer or qualified service technician.
If any of the following occurs, shut off the unit and contact your dealer or qualified service technician:
• Power cord overheats or becomes damaged
• If you notice a burning smell
• The unit trips the breaker panel or cycles off frequently without obtaining the set temperature
• Abnormal sound during operation
• If you notice water leakage
Malfunction Type Possible Causes
1. Improper or low voltage at the IPM
module.
2. IPM module malfunction.
3. Compressor Malfunction.
1. Loose connections between fan motor
and control board.
2. Fan motor or blower wheel bearings
malfunction.
3. Control board malfunction.
1. Unbalanced compressor voltage.
2. Control board malfunction.
3. Compressor malfunction.
1. Loose connections between fan motor
and control board.
2. Fan motor malfunction.
3. Control board malfunction.
Indoor and outdoor units are non-
compatible.
1. Lack of thermal grease on IPM module.
2. Heat sink (radiator) not tightly mounted.
3. Control board malfunction.
1. Reversing valve voltage is less than
175V.
2. Loose connections between reversing
valve and control board.
3. Reversing valve solenoid malfunction.
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