Trane 4TXK6512G1000AA, Service Manual, Page: 183 / 187

Error
code Indoor
display
Malfunction Description Diagnosis and Analysis
19 F19 DC voltage or AC voltage low
AC power supply of the driver module get voltage lower
than 155VAC (1phase)or driver module get high DC-BUS
voltage lower than 180VDC
20 F20
Indoor pipe temperature too high
protection
Indoor pipe temperature Tm over 63°C, error clear within 3
minutes. if temperature goes down and lower than 52°C.
21 F21
Indoor pipe temperature
sensor too low protection
Indoor pipe temperature too low, outdoor unit stop toprevent
indoor heat exchange system icing and to prevent the indoor
unit outlet air too low at the same time.
22 F22 PFC circuit loop overcurrent
Overcurrent been detected in power factor correction circuit
loop.
23 F23
Temperature too high for
compressor driver module Compressor driver module’s PIM temperature over 90°C, Error
stat-us lock if it occurs 3 times in 1 hour.
24 F24 Compressor start failure
Compressor start failure been detected by driver driver module
or wrong compressor wiring
25 F25
Input overcurrent of the drive
module
Input current of the compressor drive module higher than
EEPROM setting(details refer to service manual) Lock if
occurs 3 times in 1 hour
26 F26 Lack phase of the drive module
Lack phase of the drive module’s power supply (three
phase type)
27 F27 Input current sampling circuit fault The driver module’s input current sampling circuit damaged
28 F28 No wiring of the compressor
No wiring between compressor and it’s driver module
37 F37
Compressor overcurrent detected
by
compressor driver module
Compressor phase U or V or W over current detected by
compressor driver module (details refer to service manual)
38 F38
Drive module’s ambient temp.
sensor abnormal The temperature detected is not within the range of -25°C to
150 °C
39 F39
Mid-condenser temp. sensor TC
abnormal The temperature detected is not within the range of -55°C to
90 °C
44 F44
Outdoor condenser
temperatureTC too high protection
The maximum temperature value of Tc and T e is over 65 °C,
Error lock if it occurs 3 times in 30 minutes
45 F45 System low pressure protection
The minimum temperature value of indoor pipe Tm and
outdoorT s is lower than-45 °C at cooling mode or minimum
temperature value of outdoor Tc and outdoor T e is lower than-
45 °C at heating mode
1. 4TXK6536G1000AA:
The outdoor control board’s LED1 and LED2 indicates the outdoor error code. for example,the error code 12,
LED1 will flashing 1 and LED2 will flashing 2,alternating flashing.
4TXK6548G1000AA.4TXK6560G1000AA:
The outdoor control board’s LED3 indicates the outdoor error code. for example,the error code 12, LED3 will
display 12 and keep flashing.
2.NO-resumable means error will not clear unless:a. clean out the fault factor b. Cut the power supply off and re-
offer again after point a achieved.
3. The indoor unit can also indictes the outdoor malfuction code too. Please refer to indoor unit manul or indoor
trouble shooting to get the method .
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