Trane R-410A Split System Technical & Service Manual page 61

Figure 7. Troubleshooting chart
When unit is
cooling or
heating, both
compressor and
outdoor fan don't
run
When unit is
cooling or
heating, the
compressor runs
but outdoor fan
doesn't run
When cooling or
heating, outdoor
fan runs, but
compressor
doesn't run.
When cooling or
heating, outdoor
fan runs, but
compressor
doesn't run.
Fan doesn't run
when FAN mode
is set
Abnormal power supply of outdoor unit
Damage of outdoor main control board
Breakage of outdoor power module
Improper setting of temperature
Breakage of outdoor fan motor
Wrong wire connection
Breakage of outdoor main control board
Breakage of outdoor fan capacitor
Malfunction of compressor
Poor contact of connection between the
main control board and module
Abnormal input of power module
Abnormal output of power module
Compressor temperature is too high
Wrong wiring
Damage of outdoor main control board
Burn-out or broken wire of indoor fan
motor
Wrong wiring
Circuit break or damage of fan motor
capacitor
Check the circuit according to circuit diagram
Replace the main control board
Replace the power module
Adjust the set temperature
Replace the fan motor
Wire according to the circuit diagram
Replace the main control board
Replace the fan capacitor
Replace the compressor
Re-fasten the connection
Check if input is 320V. If not, replace the
rectifier
Replace the power module
Cool the compressor for 30 min before running
Wire according to the circuit diagram
Replace the outdoor main control board
Repair or change the fan motor
Wire according to the circuit diagram
Replace the indoor main control board
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