York RVHC-09 Service Manual page 36

10.3.4 E3(indoor fan speed out of control) diagnosis and solution
Is the indoor fan motor
connector and connection
good?
Is voltage being applied to
the fan motor?
(rang 90v-160v between
mid pin and N on CN1
10.3.5 E5(Open or short circuit of outdoor temperature sensor) diagnosis and solution.
Is the outdoor temperature
sensor connector and
connection good?
Replace the sensor and
check if E5 display again?
10.3.6 E6(open or short circuit of room or evaporator temperature sensor) diagnosis and solution.
Is the indoor temperature
and evaporator sensor
connector and connection
good?
Replace the sensor and
check if E6 display again?
10.3.7 P0(IGBT over-strong current protection) diagnosis and solution.
Is all connections on PCB
and between PCB and
compressor good?
Replace the outdoor PCB
and then repower on. Is
the failure cleared?
YES
NO
YES
YES
YES
NO
YES
NO
Repair the connector and
reconnect
YES
Replace outdoor e-box
NO
Repair the connector and
reconnect
YES
Replace the.indoor PCB
NO
Repair or correct the
connector or connection.
NO
Check the compressor
Repair the connector and
reconnect
Indoor PCB is defective.
Replace the indoor PCB.
Replace the indoor fan
motor
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