Self-Diagnosis; Leds For The Indication Of Outdoor Trouble - York YKHC 18 Service Manual

5.2 Self-diagnosis

5.2.1 Indoor unit
No. Type Contents
1 protection Over
compressor occurs 4 times in 1h
2 protection Outdoor protection (absent phrase,
phrase
protection)
3 error Room temperature sensor checking
channel is abnormal
4 error Evaporator sensor checking channel is
abnormal
5 error Condenser sensor checking channel is
abnormal
6 error Temperature fuse is melt(reserved)
5.2.2 LEDs for the indication of outdoor trouble(3 phase type,3.5~5HP)
Type
Trouble Phase sequence
Trouble Lack of phase
Trouble Protection of pressure
Trouble Overload of current
Trouble Open-circuit and short-circuit trouble of T3
Trouble Open-circuit and short-circuit trouble of T4
Trouble High temperature protection of condenser
current protection of
sequence and temperature
Contents
LED Flashing
the Lamps of operation, timer,
defrosting (only fan ) flashing
simultaneously at 5Hz.
All lamps flashing at 5Hz
Timer lamp flashing at 5Hz
Operation lamp flashing at 5Hz
Defrosting lamp flashing at 5Hz
Operation lamp and timer lamp
flashing at 5Hz
LED1
Flash
Flash
Flash
Off
Off
Off
Flash
21
Remark
Whole unit is shut down.
It cannot recover unless
power is cut off
Recover automatically
after errors are
eliminated(For T3
malfunction of 5HP,
can"t recover
automatically)
LED2 LED3
Off Off
Off Off
Flash Off
Off Flash
Flash Flash
Flash Off
Flash Flash