Carrier 42LUVH045N - Page 39

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9.2.6 E6(open or short circuit of room or evaporator temperature sensor) diagnosis and solution.
9.2.7 P0(IGBT over-strong current protection) diagnosis and solution.
9.2.8 P1(over voltage or too low voltage protection) diagnosis and solution.
Replace the outdoor
e-box.
YES
Is the power supply
good?
NO
Be sure the power
supply is normal when
using the units
Is all connections on
PCB and between
PCB and compressor
good?
Repair or correct the
connector or connection.
Replace the outdoor
PCB and then
repower on. Is the
failure cleared?
NO
YES
Check the compressor
NO
Is the indoor
temperature and
evaporator sensor
connector and
connection good?
Repair the connector
and reconnect
Replace the sensor
and check if E6
display again?
NO
YES
Replace the.indoor
PCB
YES