York YKFE12BXEXBH-RX Installation And Owner's Manual page 28

Trouble Shooting
Indoor Troubleshooting: YSM3F (10-18) AAS
Board LED display
E0
E1
E2
E8
F2
FC
① : Optional equipment
Outdoor toubleshooting
LED flash times of outdoor control board
4
5
6
TD: discharging temperature
Wired controller display ①
E0
E1
E2
E8
F2
FC
Troubleshooting
Protection of discharging temp.
too high or sensor abnormal
Phase sequence abnormal
Pressure abnormal
Troubleshooting
Malfunction of drain system
Faulty ambient
temperature sensor
Faulty coil temperature
sensor
Abnormal communication
between indoor wired
controller and indoor unit
PCB
EEPROM error
Indoor coil temperature too
high in cooling mode
After compressor starts up, if TD
is over 120°C, 10seconds later
compressor stop.
Power supply phase sequence
wrong.
High/Low pressure switch acts
abnormal.
After compressor running for 3
minutes, if switch is detected
unconnected for 30 seconds, it
alarms, if it occurs 3 times in 30
minutes, confirm this failure.
Possible reasons
Pump motor disconnected
or at wrong position, or
the float switch broken
down, or the float switch
disconnected or at wrong
position.
Sensor disconnected,
or broken, or at wrong
position, or short circuit.
Sensor disconnected,
or broken, or at wrong
position, or short circuit.
Wrong connection, or
the wired controller be
disconnected, faulty PCB.
Loss of data EEPROM.
Refrigerant leakage or
indoor coil sensor falling
off or failure on 3 phases
outdoor unit.
Possible reasons
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