Trane 4TXK6512G1000AA Service Manual page 180

10.7 4TXK6518G1000AA failure code
LED flash
times of
Indoor
Contents of Malfunction
outdoor
display
PCB
1 F1 EEPROM fault
2 F2 IPM protection
Communication between
4 F4 main board and power
module
5 F5 High pressure protection
Power module over/lack-
6 F6
voltage protection
Compressor Td temp.
8 F8
protection
9 F9 DC fan motor fault
10 F10
Abnormal of coil sensor
Suction temperature sensor Suction temperature sensor short-circuit or open-circuit or the
11 F11
failure
Outdoor ambient sensor
12 F12
fault
13 F13 Compressor Td sensor fault Compressor Td sensor short-circuit oropen-circuit
Communication between
15 F15
indoor and outdoor unit
16 F16 Lack of refrigerant
17 F17 4-way valve reverse failure
18 F18 Compressor jam
Power module PWM select
19 F19
circuit fault
Compressor U-phase over-
25 F25
current
Compressor V-phase over-
25 F25
current
Compressor W-phase over-
25 F25
current
Diagnosis and Analysis
EEPROM chip damaged or data fault
Input overcurrent occured been detected by PIM hardware
Communication fail over 4 min
System high pressure over 4.15Mpa
Send from power module
Compressor Td temp. over 110°C
Jam of DC motor or motor fault
Coil sensor short-circuit or open-circuit
compressor connection is poor
Outdoor ambient sensor short-circuit or open-circuit
Communication fail over 4min
Check if there is leakage in the unit
Alarm and stop if detect Td-Tci≤15 last for 1 min after
compressor has started for 10 min in heating mode, confirm the
failure if it appears 3 times in one hour.
Compressor jamed internally
Power module PWM selects wrong circuit
The current of compressor U-phase is too high
The current of compressor V-phase is too high
The current of compressor W-phase is too high
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